BA377NE Rugged one input Ex nA and Ex tc Timer or Clock · external events, or control external events via two ... whether it is configured as a Timer or as a Clock. 2.1 ATEX Ex nA

Issue: 6 3rd July 2018

BA377NERugged one inputEx nA and Ex tcTimer or Clock

Issue 6

2

1. DESCRIPTION

2. Ex nA NON-SPARKING CERTIFICATION2.1 ATEX Ex nA certification2.2 Zones, gas groups and T rating2.3 Special conditions for safe use2.4 Power supply2.5 Input terminals2.6 Remote reset terminals2.7 Control outputs - optional2.8 Certification label information

3. SYSTEM DESIGN FOR HAZARDOUS AREAS3.1 Power supply3.2 Pulse input

3.2.1 Input switching threshold3.2.2 Switch contact input3.2.3 Open collector input3.2.4 2-wire proximity detector input3.1.5 Magnetic pick-off input3.1.6 Voltage pulse input

3.3 Remote reset3.4 Control outputs - optional

3.4.1 Solid state output3.4.2 Ex nA certification

4. INSTALLATION4.1 Location4.2 Installation procedure4.3 Timer or Clock earthing4.4 EMC4.5 Scale card

5. ACCESSORIES5.1 Display backlight5.2 Control outputs5.3 Scale card5.4 Tag information

6. OPERATION AS A TIMER6.1 Initialisation6.2 Controls when configured as a Timer6.3 Displays when configured as a Timer6.4 Timer structure6.5 Configuration as a Timer

6.5.1 Accessing configuration functions6.5.2 Summary of Timer configuration

functions.6.5.3 Instrument function: FunCtion

6.5.4 Input: inPut

6.5.5 Input type: inP . tYPE

6.5.6 debounce: debounce

6.5.7 Lower display: di5P-2

6.5.8 Starting & stopping the Timer: 5tAr5toP

6.5.9 Units of display: unit5

6.5.10 Set time: 5Et t

6.5.11 Repeat timing cycle: CYCLE5

6.5.12 Cycle function enable: EnbL

6.5.13 Cycle count: cycl cnt

6.5.14 Restart delay: r5t dela

6.5.15 Adjusting the set time 5Et t andrestart delay r5t dela from the

display mode: AC5Et t

6.5.16 Direction of count: uP or dn

6.5.17 Power fail: p fail

6.5.18 Local reset: LoC rEt

6.5.19 Local total reset: rE5Et . enbl

6.5.20 Local grand total reset: clr Gtot

6.5.21 Control output 1 (Optional): oP1

6.5.22 Control output 1 enable: EnbL

6.5.23 Control output on at: oP1 on

6.5.24 Control output off at: oP1 oFF

6.5.25 Output on delay time: oP1 dELA


6.5.27 Reset grand total from within theconfiguration menu: Clr Gtot

6.5.28 Security code: CodE

6.5.29 Reset configuration to Timer factory defaults: r5Et dEF

7. TIMER CONFIGURATION EXAMPLES7.1 Measuring the time that a contact is closed7.2 Controlling an Ex nA solenoid valve

CONTENTS

The BA377NE is CE marked to show compliance with the European Explosive Atmospheres Directive2014/34/EU and the European EMC Directive 2014/30/EU

3

8 MAINTENANCE when configured as a Timer8.1 Fault finding during commissioning8.2 Fault finding after commissioning8.3 Servicing8.4 Routine maintenance8.5 Guarantee8.6 Customer comments

9. OPERATION AS A CLOCK9.1 Initialisation and loss of power9.2 Controls when configured as a clock9.3 Displays when configured as a clock9.4 Configration as a clock

9.4.1 Accessing configuration functions9.4.2 Summary of Clock configuration

functions.9.4.3 Instrument function: FunCtion

9.4.4 Display format: di5PLAY

9.4.5 Set Clock display time: 5et

9.4.6 Enter synchronising time: 5YnC t


9.4.8 Enable Control output 1: EnbL

9.4.9 On and off times:oP 1 : on 1; oP 1 : off 1

oP 1 : on 2; oP 1 : off 2


9.4.11 Enable control output 2: EnbL

9.4.12 On and off times:oP2 : on 1; oP2 : off 1

oP2 : on 2; oP2 : off 2

9.4.13 Access on & off times from displaymode: AC5P


9.4.15 Reset configuration to Clock factory defaults: r5Et dEF

10. CLOCK CONFIGURATION EXAMPLE10.1 Configuration procedure

11. MAINTENANCE when configured as a Clock11.1 Fault finding during commissioning11.2 Fault finding after commissioning11.3 Servicing11.4 Routine maintenance11.5 Guarantee11.6 Customer comments

Appendix 1 Dust certification

Appendix 2 IECEx certification

Appendix 3 ETL and cETL certification

4

5

1. DESCRIPTIONThe BA377NE is an Ex nA non-sparking and Ex tccertified, panel mounting instrument with a singleinput that can be installed in Zone 2 or Zone 22without the need for Zener barriers or galvanicisolators. It may be configured on-site as a Timer oras a Clock. As a Timer the BA377NE is able tomeasure and display the elapsed time betweenexternal events, or control external events via twooptional factory fitted control outputs.

When configured as a Clock, the instrument candisplay time in a variety of formats and the twooptional control outputs may be configured to switchloads on and off at pre-set times.

This instruction manual is divided into sections.

Common features2. Ex nA certification3. System design for hazardous areas4. Installations5. Accessories

Timer6. Operation as a timer7. Configuration example8. Maintenance

Clock9. Operation as a clock

10. Configuration example11. Maintenance

The common features sections of this instructionmanual describe ATEX Ex nA certification for use ingas atmospheres.

Ex tc dust certification is described in Appendix 1.

For international applications the BA377NE hasIECEx gas and dust certification which is describedin Appendix 2.

For applications in the USA and Canada theBA377NE has ETL and cETL certification which isdescribed in Appendix 3.

This instruction manual supplements theabbreviated instruction sheet supplied with eachinstrument.

2. Ex nA NON - SPARKING CERTIFICATIONThe BA377NE has ATEX and IECEx gas and dustcertification. This section of the instruction manualdescribes ATEX gas certification. Dust, IECEx andother approvals are each described in separateappendixes to this manual. The Ex nA and Ex tccertification of the instrument is unaffected bywhether it is configured as a Timer or as a Clock.

2.1 ATEX Ex nA certificationNotified Body Intertek Testing and Certification Ltdhave issued the BA377NE with a Type ExaminationCertificate number ITS16ATEX48409X. This hasbeen used to confirm compliance with the EuropeanATEX Directive for Group II, Category 3Gequipment. The instrument carries the CommunityMark and, subject to local codes of practice, may beinstalled in any of the European Economic Area(EEA) member countries and in the EEA EFTAstates, Iceland, Liechtenstein and Norway. ATEXcertificates are also acceptable in Switzerland andTurkey. The European Commission's Blue Guidelists the member states, overseas countries andterritories that have adopted harmonisationlegislation.

This section of the instruction manual describesATEX installations in explosive gas atmospheresconforming with EN 60079-14 Electrical installationsdesign, selection and erection. When designingsystems for installation outside the UK the localCode of Practice should be consulted.

2.2 Zones, gas groups and T ratingThe Timer or Clock has been certified as Group IICategory 3G Ex ic nA IIC T5 Gc –40°C ≥ Ta ≥ +60°Capparatus. This is non-sparking apparatuscomplying with EN 60079-15 Equipment protectionby type of protection 'n' that minimises the risk ofarcs or sparks capable of creating an ignition hazardoccurring during conditions of normal operation.

The instrument's front panel push button contactsare non incendive and have been certifiedintrinsically safe Ex ic without the need for anexternal Zener barrier or galvanic isolator, as shownon the Type Examination Certificate. This allows theTimer or Clock to be adjusted and configured livewhen installed in a Ex n panel enclosure located inZone 2.

6

When connected to a suitable system and correctlymounted in a panel enclosure complying with therequirements for Type of protection 'n', the panelenclosure containing the BA377NE may be installedin:

Zone 2 explosive gas air mixture notlikely to occur, and if it does will only exist for a short time.

Be used with gases in groups:Group A propaneGroup B ethyleneGroup C hydrogen

In gases that may safely be used with equipment having a temperature classification of:

T1 450oCT2 300oCT3 200oCT4 135oCT5 100oC

At ambient temperatures between -40 and +60oC.

This allows use with all commonly used industrialgases except carbon disulphide CS2.

2.3 Special conditions for safe useSpecial conditions for safe use are specified by theEx nA certificate indicated by the certificatenumber's 'X' suffix. These state that the BA377NETimer or Clock should be:

a. Mounted such that the instrument terminalsare protected by at least an IP54 enclosurecompliant with IEC 60079-0 & IEC 60079-15.

b. Be supplied from limited energy circuits withoutput parameters in normal operation equalto, or less than the instruments inputparameters.

These special conditions for safe use can besatisfied by mounting the BA377NE in an Ex n, Ex eor Ex p panel enclosure. For ATEX Category 3installations in Zone 2, self or third party certifiedEx n, Ex e or Ex p panel enclosures may be used.Additional requirement apply for non-metallic panelenclosures.

2.4 Power supplyThe input safety parameters for the power supplyterminals 1 and 2 are:

Ui = 30V dcIi = 100mA

This allows the BA377NE to be powered from anydc supply which in normal operation has an outputvoltage of less than 30V. See section 3.1 for powersupply recommendations.

2.5 Input terminalsThe BA377NE Timer or Clock has a single pair ofpulse input terminals 5 and 6 that may be configuredfor use with different types of sensor. For sensors that require energising to determinetheir state, such as switch contacts or a 2-wireproximity detector, an external link betweenterminals 3 & 4 of the BA377NE connects an internal7V, 6mA supply to the input terminals. Energising isnot required when the Timer or Clock input isconnected to a voltage pulse source.

Fitting an external link between terminals 3 & 4changes the Timer or Clock's pulse input safetyparameters as shown below. This table also showsthe types of sensor requiring energising (link fitting).

Safety parameters Input Output

Type of input Link 3 & 4 Ui Uo IoSwitch contact Yes 15V 10.5V 9.2mAProximity detector Yes 15V 10.5V 9.2mAOpen collector Yes 15V 10.5V 9.2mAMagnetic pick-off No 30V 1.1V 0.5mAVoltage input (low) No 30V 1.1V 0.5mAVoltage input (high) No 30V 1.1V 0.5mA

2.6 Remote reset terminalsThe BA377NE total display my be reset to zero byconnecting the external reset terminals RS1 andRS2 together for more than one second. The tworeset terminals have the following safety parametersin normal operation:

Ui = 30V Uo = 3.8VIo = 1mA

2.7 Control outputs - optionalEach of the two optional control outputs is aseparate galvanically isolated Ex nA circuit with thefollowing input parameters:


This allows each control output to switch any dccircuit providing that in normal operation themaximum supply voltage is not greater than 30V dcand the switched current is not greater than 200mA.

Providing that the BA377NE Timer or Clock iscorrectly installed in a panel enclosure located inZone 2 complying with the requirements for Ex nprotection, the two control outputs may be used toswitch suitably protected equipment located in Zone1 or 2 of a hazardous area, or equipment located ina safe area.

7

2.8 Certification label informationThe BA377NE product certification label is fitted in arecess on the top outer surface of the enclosure. Itshows the ATEX and IECEx certification informationplus BEKA associates name and location and theinstrument serial number. Certification informationfrom other authorities may also be included.

BA377NE Certification information label

3. SYSTEM DESIGN FOR HAZARDOUS AREAS

When correctly installed in Zone 2 the BA377NETimer or Clock may be connected to almost anyapparatus in the safe area and to Ex n, Ex e, Ex pand Ex d protected apparatus located in Zone 2.Because the BA377NE is not certified intrinsicallysafe it should not be connected to an intrinsicallysafe system.

BEKA Application Guide AG310, Guide forInstallation of [extra low voltage d.c.] Ex nAinstrumentation, which can be downloaded fromwww.beka.co.uk, contains explanations andrecommendations for the installation of Ex nAequipment.

In addition to being able to be connected to otherequipment in the safe area and in Zone 2, theBA377NE may also be connected to suitablyprotected and certified equipment located in Zone 1.This is illustrated in Fig 4 and explained inApplication Guide AG310.

There are four design requirements:

1. The BA377NE must be installed in a panelenclosure complying with the requirements forEx n protection as shown in section 4 of thismanual.

2. The BA377NE should be powered from acircuit that has output safety parameters innormal operation equal to, or less than, theinput safety parameters for terminals 1 and2 specified by the BA377NE ATEX TypeExamination Certificate.

3. Hazardous area apparatus to which theBA377NE is connected should be protectedby a technique suitable for the Zone inwhich the equipment is located such as Ex nor Ex e if located in Zone 2. Equipmentprotected by intrinsic safety should not beconnected to a BA377NE.

4. Wiring should comply with Clause 9 ofEN 60079-14.

When designing a system it is important toremember that terminals 2, 6 and RS2 areinterconnected within the BA377NE. See Figs 7 & 11.

8

3.1 Power supplyThe BA377NE Timer or Clock require a minimum of10V between terminal 1 & 2 and consumes:

10mA without optional backlightplus 6mA when terminals 3 & 4 are linked

A 24V dc regulated supply with a current limitlocated in a safe area is suitable. The power supplyshould meet the requirements for personnel safetyso that ‘live maintenance’ can safely be performed.The implicit requirement for galvanic isolation fromthe mains supply ensures that the possibledifficulties from circulating earth currents caused bymains faults is minimised. In European terms if thepower supply is CE marked it is almost certainlyacceptable.

To comply with the requirements of EN 60079:14Electrical installations design, selection anderection, each of the wires entering the hazardousarea should be individually fused and contain ameans of isolation. These two requirements may besatisfied by using DIN rail mounted terminalsincorporating a fuse with easily removable fuseswhich can be extracted to achieve isolation asshown in Fig 1. Clear identification of, and easyaccess to the means of isolation is essential for theireffective use. It is also necessary to ensure that themaintenance procedure makes sure thatunauthorised re-closure of the switches does notoccur. It is not considered necessary to have ameans of isolation or electrical protection for thescreen.

Fig 1 DIN rail mounting terminals incorporating afuse

For some applications Ex nA instrumentationenergised by a current limited power supply orinstrument that can be switched off, is consideredadequate and to comply with the requirements of thestandard.

3.2 Pulse inputThe BA377NE can be controlled from a wide varietyof pulse output sensors located in a Zone 2hazardous areas or in a safe area. Fig 2 shows theconnections when the sensor is located in Zone 2and Fig 3 the connections required when the sensoris in a safe area.

Fig 2 Connections for sensor in Zone 2

Fig 3 Connections for sensor in safe area

9

Providing the BA377NE Timer or Clock is correctlyinstalled in an Ex n panel enclosure located inZone 2, the input terminals may be connected to acertified sensor located in Zone 1 as shown in Fig 4.The sensor should have Ex e or Ex d certificationpermitting installation in Zone 1. Intrinsically safeEx i certified sensors should not be used.

Fig 4 Connection to an Ex d or Ex e sensor in Zone 1.

3.2.1 Input switching thresholdFor reliable totalisation the Timer or Clock pulseinput must fall below the lower threshold and riseabove the upper thresholds shown in the followingtable.

Input transducer

Switching thresholds

Lower Upper

Open collector 2kΩ 10kΩ

Voltage pulselow

1.0V 3.0V

Voltage pulsehigh

3.0V 10.0V

Magnetic pick-off 0mV 40mV peak

Proximitydetector

1.2mA 2.1mA

Switch 100Ω 1000Ω

Switch contact, proximity detector and opencollector sensors require energising which isachieved by linking BA377NE terminals 3 and 4.

3.2.2 Switch contact inputAny mechanically or magnetically activated switchcontact located in Zone 2 or in the safe area may bedirectly connected to the BA377NE pulse inputterminals 5 and 6, providing the sensor andassociated wiring can withstand a 500V rmsinsulation test to earth. Most magnetically activatedreed relays comply with these requirements.

The BA377NE contain a configurable debouncecircuit to prevent false triggering. See section 6.5.6.

3.2.3 Open collector inputOpen collector sensors located in Zone 2 or in thesafe area may be directly connected to inputterminals 5 & 6 providing the sensor and associatedwiring can withstand a 500V rms insulation test toearth.


3.2.4 2-wire proximity detector inputMost Zone 2 certified NAMUR 2-wire proximitydetectors may be directly connected to a BA377NEinput terminals 5 & 6 providing minimum operatingvoltage is greater than 7.5V. The sensor and theassociated wiring should be able to withstand a500V rms insulation test to earth.


3.2.5 Magnetic pick-off input Magnetic pick-offs will usually have a low level acvoltage output which a BA377NE Timer or Clock cansense when configured for a CoiL input. The Timeror Clock input terminals 5 and 6 may be connectedto any Zone 2 certified magnetic pick-off sensorproviding the output in normal operation is less than30V which is the Ui of the BA377NE. The sensorand associated wiring should be able to withstand a500V rms insulation test to earth.


3.2.6 Voltage pulse inputTwo voltage pulse input ranges are selectable in theBA377NE Timer or Clock configuration menu, VoLt5

L and VoLt5 H. The Timer or Clock input terminals5 and 6 may be connected to any Zone 2 certifiedvoltage pulse, providing the output in normaloperation is equal to or less than 30V and thesensor and associated wiring are able to withstand a500V rms insulation test to earth.


10

3.3 Remote resetThe BA377NE Timer or Clock's total display may beremotely reset to zero by connecting terminals RS1and RS2 together. Permanent interconnectioninhibits timing. Remote resetting may beaccomplished by any mechanically operated switchlocated in Zone 2 as the Timer or Clock's resetcircuit is non incendive. The reset switch and theassociated wiring should be able to withstand a500V rms insulation test to earth.

A BA377NE may also be remotely reset from thesafe area. Any switch may be used. Fig 3 illustrateshow a BA377NE may be reset from both the safeand the hazardous area.

The BA377NE total display may also be reset whenthe & and * push buttons are operatedsimultaneously in the display mode i.e. when theinstrument is displaying elapsed time. See 6.5.19

3.4 Control outputs (optional)The BA377NE can be supplied with factory fitteddual, solid state, single pole control outputs that maybe independently configured with normally open ornormally closed outputs.

CAUTION

Control outputs should not be used forcritical safety applications such as a shutdown system.

When the BA377NE Timer or Clock power supply isturned off or disconnected, the control outputs willopen irrespective of whether normally open ornormally closed outputs have been selected.

Control output annunciators on the instrumentdisplay indicate the status of each output. If acontrol output delay or silence time has beenselected the annunciator will flash during the delayor silence period.

3.4.1 Solid state output Each control output has a galvanically isolatedsingle pole solid state switch output as shown inFig 5. The outputs are polarised and current willonly flow in one direction. Terminals A1 and A3should be connected to the positive side of thesupply.

Ron = less than 5Ω + 0.7V

Roff = greater than 1MΩ

Note: Because of the series protection diode sometest meters may not detect a closed controloutput.

Fig 5 Equivalent circuit of each control output

11

3.4.2 Ex nA certificationEach control output is a separate galvanicallyisolated Ex nA circuit with the following inputparameters:


This allows each control output to switch any dccircuit providing that in normal operation themaximum supply voltage is not greater than 30V dcand the switched current is not greater than 200mA.

Providing that the BA377NE Timer or Clock iscorrectly installed in a panel enclosure located inZone 2 complying with the requirements for Ex nprotection, the two control outputs may be used toswitch suitably protected equipment located in anyZone of a hazardous area, or equipment located in asafe area.

Fig 6 shows a typical application in which aBA377NE Timer or Clock, mounted in an Ex n panelenclosure located in Zone 2, is being controlled by aflameproof Ex d 2-wire sensor located in Zone 1.Control output 1 is switching an Ex e sounder inZone 1 and control output 2 is switching a sounderlocated in the safe area.

Fig 6 Typical control output application(Shown without recommended screened cables)

To comply with the requirements of EN 60079-14Electrical installations design, selection anderection, each of the wires entering the hazardousarea should be individually fused and contain ameans of isolation. These two requirements arefrequently satisfied by using fuse holders with easilyremovable fuses and removing the fuses to achieveisolation. This is a satisfactory method at the lowvoltages and currents common in instrumentationsystems. Clear identification of, and easy access tothe means of isolation is essential for their effectiveuse. It is also necessary to ensure that themaintenance procedure makes sure thatunauthorised re-closure of the switches does notoccur. It is not considered necessary to have ameans of isolation or electrical protection for thescreen. Figure 2 illustrates an example of this typeof fused terminal block.

For some application Ex nA instrumentationenergised by a current limited power supply orinstrument that can be switched off, is oftenconsidered adequate and to comply with therequirements of the standard.

12

4. INSTALLATION

4.1 LocationWhen installed in a panel enclosure complying withthe requirements for Ex n protection as shown insection 3.2 of this manual, the BA377NE may belocated in a Zone 2 hazardous area providing thatthe operating temperature is between –40°C and+60°C and the installation complies with the Timer orClocks certification requirements. Certified Ex epanel enclosures are frequently used as Ex n panelenclosures as they satisfy the same impact andingress protection requirements.

The BA377NE Timer or Clock has a stainless steelhousings with a 7J front of panel impact resistanceincorporating a 10mm thick toughened glass windowwhich can withstand a 4J impact. This, togetherwith a captive silicone gasket which seals the jointbetween the instrument and the panel, enclosureprovides IP66 ingress protection. The BA377NEhas IP20 rear protection which can be increased toIP66 by an optional A495 rear cover sealing kit.

Although the front of the BA377NE Timer or Clockhas IP66 protection, it should be shielded fromcontinuous direct sunlight and severe weatherconditions.

Fig 7 shows the overall dimensions of the BA377NEtogether with the recommended panel enclosurecut-out dimensions and terminals.

4.2 Installation Procedure

a. Cut the aperture specified in Fig 7 in the panelenclosure. Ensure that the edges of aperture arede-burred.

b. Inspect the Timer or Clock's captive gasket andensure that it is not damaged before inserting itinto the panel enclosure aperture.

c. If the enclosure panel is less than 1.0mm thick,or is non-metallic, an optional BEKA stainlesssteel support plate should be slid over the rear ofthe indicator before the panel clamps are fitted toevenly distribute the clamping force and preventthe enclosure panel being distorted or creeping.

d. Slide a panel clamp into the two grooves at eachcorner of the indicator housing with the M3 studprotruding through the hole at the rear of theclamp. Fit the stainless steel spring washer overthe stud and secure with the stainless steel wingnut.

e. Evenly tighten the four clamps to secure theinstrument. The recommended minimumtightening torque for each wing nut is 22cNm(1.95 lbf in).

f. Connect the panel enclosure wiring to the rearterminal blocks. To simplify installation, theterminals are removable so that wiring can becompleted before the instrument is installed.Wiring should be supported to prevent damageresulting from vibration.

g. Finally, fit a silicone rubber push-on cap to theend of each M3 threaded rod.

Support panel wiring to prevent vibration damage

Note: Optional backlight is internally powered

Fig 7 BA377NE dimensions and terminals

13

Fig 8 Installation procedure

4.3 Timer or Clock earthingThe BA377NE has an M4 earth stud on the rearpanel which should be electrically connected to thepanel enclosure in which the Timer or Clock ismounted, or to the plant equipotential conductor.

4.4 EMCThe BA377NE complies with the requirements of theEuropean EMC Directive 2014/30/EU. For specifiedimmunity all wiring should be in screened twistedpairs, with the screens earthed in the safe area.

Fig 9 Rear terminals without accessories

4.5 Scale cardThe BA377NE's units of measurement are shown ona printed scale card in a window at the right handside of the display. The scale card is mounted on aflexible strip that is inserted into a slot at the rear ofthe instrument as shown in Fig 10. Thus the scalecard can easily be changed without removing theBA377NE from the panel or opening the instrumentenclosure.

New instruments are supplied with a printed scalecard showing the requested units of measurement, ifthis information is not supplied when the instrumentis ordered a blank card will be fitted.

A pack of self-adhesive scale cards printed withcommon units of flow measurement is available asan accessory from BEKA associates. Customprinted scale cards can also be supplied - see 5.3

To change a scale card, unclip the tapered end ofthe flexible strip at the rear of the instrument bygently pushing it upwards and pulling it out of theenclosure. Peel the existing scale card from theflexible strip and replace it with a new printed card,which should be aligned as shown below. Do not fita new scale card on top of an existing card.

Install the new scale card by gently pushing theflexible strip into the slot at the rear of theinstrument, when it reaches the internal end-stopsecure it by pushing the end of the flexible stripdownwards so that the tapered section is held by therear panel.

Align the self-adhesive printed scalecard onto the flexible strip and insertthe strip into the instrument as shownbelow.

Fig 10 Inserting the flexible strip carrying the scalecard into slot at the rear of the instrument.

14

5. ACCESSORIES

5.1 Display backlightThe BA377NE Timer and Clock can be supplied witha factory fitted backlight that produce greenillumination enhancing display contrast and enablingit to be read at night or in poor lighting conditions.The backlight is internally powered from theinstrument power supply so no additional field wiringis required, but the supply current increases asshown below.

BA377NE current

consumptionWithout backlight 10mA

Additional for backlight 22mAAddition with terminals 3 & 4 linked 6mA

---------------Total current 38mA max

5.2 Control outputsAlthough the dual isolated control outputs arefactory fitted options, they are described in the mainbody of this instruction manual as they will be usedfor the majority of applications. If control outputs arerequired they should be specified when theinstrument is ordered.

5.3 Scale cardThe BA377NE has a window on the right hand sideof the display through which a scale card showingthe units of measurement such as hours can beseen. New instruments are fitted with a scale cardshowing the units of measurement specified whenthe instrument was ordered, if the units are notspecified a blank scale card will be fitted. A pack ofscale cards pre-printed with common units ofmeasurement is available as an accessory. Thesecan easily be fitted on-site without opening theinstrument enclosure or removing it from the panel.See section 4.5 of this instruction manual.

Custom scale cards for applications requiring lesscommon units of measurement are also available.

5.4 Tag informationNew instruments can be supplied with a tag numberor application information printed onto the rear paneladjacent to the terminals. This information is notvisible from the front of the instrument afterinstallation.

5.5 Rear cover sealing kitThe BA377NE Timer or Clock’s rear of panel ingressprotection can be increased from IP20 to IP66 with aBA495 rear cover sealing kit. Manufactured from316 stainless steel the cover incorporates two M20unthreaded entries for cable glands.

Note:The BA495 rear cover sealing kit provides additionalrear impact and ingress protection but it is not Ex nAcertified. Therefore the BA377NE Timer or Clockmust still be mounted within an Ex nA, Ex e or Ex penclosure as described in section 4 of this manual tocomply with Ex nA certification requirements.

15

6. OPERATION AS A TIMERWhen configured as a Timer the BA377NE canmeasure and display the elapsed time betweenexternal events such as measuring and displayinghow long machinery is operating. The Timer can bestarted and stopped by a remote sensor, or from thefront panel push buttons.

The addition of two optional factory fitted isolatedcontrol outputs allows the Timer to control externalevents such as opening a valve for a predeterminedtime. Again the Timer can be started and stoppedby a remote sensor, or from the front panel pushbuttons.

When controlling external events the CYCLE functionenables the BA377NE Timer to be configured torepeat the timing period up to 99 times with aconfigurable delay between timed periods up to 100hours or to repeat continuously.

The BA377NE may be configured to time-up fromzero to the set time 5Et t, or to time-down from theset time to zero. The set time may be entered anddisplayed in hours, minutes or seconds, or acombination of units. Elapsed or remaining time iscontinuously displayed and a separate display maybe activated to show the Timer set time 5Et t.Resetting the timer cycle can be accomplished viathe front panel push buttons or by a remote contact.

A grand total time is maintained which can beviewed by operating the front panel push buttons. Itmay be reset to zero from within the configurationmenu, or the instrument may be configured to allowresetting from the front panel push buttons.

Fig 11 shows a simplified block diagram of theBA377NE when configured as a Timer. The inputcan be configured to accept inputs from a widevariety of sensors. When the sensor requiresenergising, such as a switch contact, open collectoror a two wire proximity detector, a link connectedbetween terminals 3 & 4 supplies power to thesensor input.

The instrument can be supplied with the followingfactory fitted accessories:

Internally powered Backlight

Dual isolated Control Outputs

The two factory fitted solid state isolated controloutputs may be independently configured to closeand open at specified parts of the timer cycle, suchas when the timer starts or finishes.

6.1 InitialisationEach time power is applied to a BA377NEinitialisation is performed. After a short delay thefollowing display sequence occurs:

All segments of the display are activated

BA377NE is ready to start functioning usingthe configuration information stored in theinstrument's permanent memory.

Fig 11 BA377NE block diagram with Timerconfiguration.

16

6.2 Controls when configured as a TimerThe BA377NE is controlled and configured via fourfront panel push buttons. In the display mode i.e.when the instrument is displaying time the pushbutton functions are:

Push Button Functions

& When local control is enabled startsthe Timer. See 6.5.8

* When local control is enabled stopsthe Timer. See 6.5.8

) + * Shows the grand total (run time) inhours and tenths of an hourirrespective of Timer configuration.If buttons are held for longer thanten seconds the grand total may bereset to zero if the grand total resetsub-function clr gtot is enabled inthe LoC r5Et configuration function.See 6.5.20

To reset the grand total to zero fromthe display mode press the) + * buttons for ten secondsuntil CLr. no is displayed, using the& or * button change the displayto CLr. YE5 and press ).

& + * Resets the Timer to zero or to theset time 5Et t depending onwhether the Timer is configured totime-up or time-down when the twobuttons are operatedsimultaneously for more than twoseconds. This is a configurablefunction. See 6.5.19

( + * When enabled in the configurationmenu, operating these two buttonssimultaneously provides directaccess to the set time 5Et t andallows adjustment when the timer isin the display mode. See 6.5.15

( + & Shows in succession, firmwareversion number, instrument functionelap5e and any output accessoriesthat are fitted:

-A Dual Control Outputs

( + ) Access to configuration menu

6.3 Displays when configured as a TimerThe BA377NE has two digital displays andassociated annunciators as shown on front cover ofthis manual.

Elapsed time The upper display shows theelapsed time since the Timerwas started when timing-up fromzero and the remaining timewhen timing-down from the settime. The display may beformatted as hh:mm:ss; hh:mm;mm:ss or ss.

Lower display The display options available onthe lower display depend onwhether the Timer repeat cyclefunction CYCLE5, which canrepeat the timing period up to 99times, or continuously with aconfigurable delay betweenperiods, is enabled.

CYCLE5 disabledThe lower display shows the settime 5ET t, or the lower displaymay be disabled if not required.See 6.5.7

CYCLE5 enabledThe lower display shows thetotal number of repeat cyclesrequested together with thenumber of the current cycle.Each operation may be brieflynamed at it's start or periodicallythroughout the cycle.The lower display may also bedisabled if not required.See 6.5.7

Reset Activated while elapsed time isannunciator being reset to zero or to the set

time 5ET t.

Grand total Activated when the grand totalannunciator time is being shown on the

upper display.

Control output Show status of both optionalannunciators control outputs.

17

6.4 Timer structureFig 12 illustrates the Timer structure and function asa state diagram. It applies when the instrument ismeasuring the time between events or is controllingexternal events.

The circles in Fig 12 represent the five Timer states,Reset, Running, Restart-delay, Paused andComplete. The lines between the circles representthe event required to move the Timer betweenstates. e.g. to initiate timing the Timer is movedfrom the Reset state to the Running state by a startevent. This could be an input signal or operation ofthe & button. Similarly, to pause the Timer while itis timing, the Timer must be moved from theRunning state to the Pause state by a stop eventwhich could be an input or operation of the *

button.

ResetIn this state the Timer is readied for operation.The Timer is stopped and loaded with zero fortiming-up or 5Et t for timing-down.

RunningEntered by a start event from the Reset orPaused states. The Timer times-up to 5et t

or times-down to zero depending upon it'sconfiguration.

PauseEntered by a stop event from Running orRestart-delay. Timer is stopped, a start eventreturns the timer to it's previous state.

Restart-delayEntered automatically from Running. At theend of the delay time automatically returns toRunning.

CompleteEntered automatically from Running whenthere are no more timing cycles to perform.

When the CYCLE5 function is enabled the timingcycle can be repeated a specified number of times,or continuously.

18

6.5 Configuration as a TimerThe BA377NE is configured via the four front panelpush buttons. All the configuration functions arecontained in an easy to use intuitive menu that isshown diagrammatically in Fig 13.

Each menu function is summarised in section 6.5.2of this manual and each summary includes areference to more detailed information.

All new BA377NE instruments are suppliedconfigured as requested at the time of ordering. Ifconfiguration is not requested, the BA377NE will besupplied with default Timer configuration as shownbelow, but the instrument can easily be re-configured on-site.

Function Display DefaultAccess code CodE 0000

Function FunCtion ELAP5E

Input inPut oP . CoL

Debounce dEbounCE dEFAuLt

Display 2 di5P-2 5td

Start stop 5tAr5toP LoCAL

Units unit5 12 : 00 : 00

Set time 5Et t 00 : 00 : 00

Enable repeat cycle CYCLE5 oFF

Access set time from AC5Et t oFF

display mode.

Direction of count uP or dn dn

Recovery from power p-fail idle

supply failure.Local total reset t-rE5Et on

Local grand total reset Gt-rE5Et oFF

External reset E-r5et 5td

Enable control output 1 * EnbL oFF

Enable control output 2 * EnbL oFF

* Optional output

6.5.1 Accessing configuration functionsThroughout this manual front panel push buttons areshown as &, *, ( and ) and legendsdisplayed by the instrument are shown in a sevensegment font just as they appear on the instrumente.g. inPut and Clr Gtot.

Access to the configuration menu is obtained byoperating the ( and ) push buttonssimultaneously. If the instrument is not protected byan access security code the first parameterFunCtion will be displayed. If a security code otherthan the default code 0000 has already beenentered, the instrument will display CodE. Press( to clear this prompt and enter the security codefor the instrument using the & or * push button toadjust the flashing digit and the ( push button totransfer control to the next digit. If the correct codehas been entered pressing ) will cause the firstparameter FunCtion to be displayed. If an incorrectcode is entered, or a push button is not operatedwithin ten seconds, the instrument will automaticallyreturn to the display mode.

All configuration functions and prompts are shownon the upper eight digit display.

Once within the main configuration menu therequired function can be selected by scrollingthrough the menu using the & or * push button.The Timer configuration menu is showndiagrammatically in Fig 13.

When returning to the display mode followingreconfiguration, the Timer will display dAtA followedby 5AVE while the new information is stored inpermanent memory.

19

6.5.2 Summary of Timer configuration functions

This section summarises all the Timer configurationfunctions. When read in conjunction with Fig 13 itprovides a quick aid for configuring the Timer. Ifmore detail is required, each section of thissummary contains a reference to a full description ofthe function.

Display Summary of function

FunCtion Instrument functionDefines the function of the instrument.May be set to:

ELAP5E Timer configurationCloC Clock configuration

All the entries in this Timer summaryassume that the BA377NE isconfigured as a Timer by selectingELAP5E.See section 6.5.3

inPut Configuration of Input Contains a sub-menu with two sub-functions:

inP . tYPE Selects input sensor typedEbounCE Defines input debounceSee section 6.5.4

inP . tYPE

Configures the Timer sensor input toaccept one of six types of input:oP.CoL Open collector VoLt5 L Voltage pulse <1 >3VVoLt5 H Voltage pulse <3 >10VCoiL Magnetic pick-off Pr.dEt Proximity detector ContACt Switch contact

Energise input by linking terminals3 & 4.

See section 6.5.5

dEbounCE

Defines the level of debounce appliedto the input to prevent falsefunctioning:

dEFAuLt

HEAVY

LiGHt

See section 6.5.6


di5P-2 Lower displayConfigures the lower display to showset time 5Et t or, when the CYCLE5

repeat function is activated, the restartdelay count-down plus the cycle countnumber.

With CYCLE5 not enabled:

Select Lower display shows5td Set time 5et t

oFF Disables lower display.See section 6.5.7

With CYCLE5 enabled:

Select Lower display shows 5td Cycles requested and

cycles performed with time-down shown duringrequested delay period.Brief notification of timerstatus i.e. CYCLE or dELAY at start of each period.

LAbEL Exactly as 5td but with periodic notification of timer status i.e. CYCLE ordELAY.

oFF Disables lower display.See section 6.5.7

5tAr5toP Starting and stopping the timerDefines how the Timer is started andstopped.

Start StopLoCAL & button * buttonControL 1 Input high Input lowControL 2 Input low Input high

High and low inputs are specified for avoltage input. For other types ofsensor input. See section 6.5.8

20


unit5 Units of displaySelects displayed units.

12 : 00 : 00 Hours, minutes & seconds12 : 00 Hours & minutes *

30 : 00 Minutes & seconds 30 Seconds

Excludes delay of optional controloutputs which is always shown inseconds and the grand total which isalways shown in hours.*Only available if 5et t and r5t dELA ,if already entered, specify zeroseconds or seconds which are exactlydivisible by sixty.See section 6.5.9

5Et t Set timeWhen controlling an external event viathe optional control outputs theBA377NE will time-down from the settime to zero or time-up from zero to theset time.Note: Timer will only start if a non zerovalue is entered for set time 5et t.See section 6.5.10

CYCLE5 Repeat timing cycleContains a sub-menu with threesub-functions, EnbL, CYCL Cnt andr5t dELA.See section 6.5.11

Cycle function enable EnbL

Enables or disables the cycle5

function without changing theparameters.See section 6.5.12

Cycle count CYCL Cnt

Defines the number of times that thetimer cycle is repeated.See section 6.5.13

Restart delay r5t dELA

Defines the time delay between timercycles.See section 6.5.14

AC5Et t Access 5Et t and r5t dela fromdisplay mode.Enables 5Et t and r5t dela to beadjusted from the display mode. Alsocontains a sub-function ACCd whichdefines a separate code to protectaccess from the display mode to 5Et t

and r5t dela .See section 6.5.15


uP or dn Direction of countDefines whether the Timer times-downfrom 5Et t' to zero or times-up fromzero to the set time 5Et t.See section 6.5.16

P-FAiL Power FailureDefines how the Timer functions whenpower is restored after a power failure.Contains three sub-functions idle,Pau5E and continue.

idle Timer returns in stopped stateas if having completed asingle timing cycle displayingTimer value when power waslost. Timing resumes whenreset followed by startinstructions are received.

Pau5e Timer returns in paused statedisplaying Timer value whenpower was lost. Timingresumes when startinstruction is received.

Continue Timer will continue withoutany manual intervention.

See section 6.5.17

LoC r5Et Local resetContains two sub-functions whichwhen enabled allow the Timer and thegrand total, which represents totalTimer run-time, to be reset to zero viathe front panel push buttons while theTimer is in the display mode.See section 6.5.18

Local total reset r5Et.EnbL

When on is selected, Timer is reset tozero, or 5et t if timing-down, when the& and * buttons are operatedsimultaneously for more than 2seconds in the display mode.See section 6.5.19

Local grand total reset CLr Gtot

When on is selected the grand total,which represents total run-time, maybe reset to zero by operating the) + * buttons simultaneously formore than 10 seconds in the displaymode.Note: Once reset, the grand total cannot be recovered.See section 6.5.20

21


oP1 Control output 1 (Optional)Contains sub-menu with four sub-functions, EnbL, oP1 on, oP1 oFF andoP1 dELA.See section 6.5.21

Control output enable EnbL

Enables or disables control output 1without changing the parameters.See section 6.5.22

Control output 1 on at oP1 on

Defines when the control output turnson (closes).See section 6.5.23

Control output 1 off at oP1 oFF

Defines when the control output turnsoff (opens).See section 6.5.24

Control output 1 delay oP1 dELA

Introduces a configurable delaybetween the oP1 on condition occurringand the control output turning on(closing).See section 6.5.25

oP2 Control output 2 (Optional)Functions as control output 1.See section 6.5.26


CLr Gtot Resets grand total to zeroThis function resets the grand total,which represents the total Timer run-time, from within the configurationmenu when CLr YE5 is selected and5urE is entered to confirm theinstruction.Note: Once reset, the grand total cannot be recovered.See section 6.5.27

CodE Security codeDefines a four digit alphanumeric codethat must be entered to gain access tothe instrument's configuration menu.Default code 0000 disables the securityfunction and allows unrestrictedaccess to all configuration functionswhen the ( and ) buttons areoperated simultaneously in the displaymode.See section 6.5.28

r5Et dEF Reset to factory defaultsResets the BA377NE to the factorydefault configuration shown in section6.5 when YE5 is selected andconfirmed by entering 5urE.See section 6.5.29

22

6.5.3 Instrument function: FunCtion

The BA377NE may be configured as a Timer or as aClock. This section of the instruction manualdescribes the Timer, for details of Clockconfiguration see section 9.

To reveal the existing function of the instrumentselect FunCtion from the configuration menu andpress (. If ELAP5E is displayed, the instrument isalready configured as a Timer therefore press ) toreturn to the FunCtion prompt in the configurationmenu. If CloC is displayed, press the * or &

button to change the setting to ELAP5E followed bythe ( button which will result in a 0000 promptbeing displayed with the first digit flashing. This is arequest for the instruction to be confirmed byentering 5urE using the & and * buttons to adjustthe flashing digit and the ( button to move controlto the next digit. When 5urE has been entered,pressing ) will reconfigure the instrument to aTimer and return the display to FunCtion in theconfiguration menu.

6.5.4 Input: inPut

The inPut function contains two sub-functionsinP . tYPE which defines the type of sensor that maybe connected to the input and dEbounCE whichadjust the amount of input noise rejection.

6.5.5 Input type: inP . tYPE

inP . tYPE is a sub-menu in the inPut function whichdefines the type of input sensor that may beconnected to the input. To check or change the typeof input, select inPut in the configuration menu andpress ( which will reveal the inP . tYPE prompt,pressing ( again will show the existing input type.If set as required press ) twice to return to theconfiguration menu, or repeatedly press the * or& button until the required type of input isdisplayed and then press ) twice to return to theconfiguration menu.

One of following six types of input may be selected:

Display Input type Switchingthresholds

Low HighoPCoL Open collector² 2 10kΩVoLt5 L Voltage pulse low¹ 1 3VVoLt5 H Voltage pulse high¹ 3 10VCoiL Magnetic pick-off 0 40mVPr . dEt Proximity detector² 1.2 2.1mAContACt Switch contact² 100 1000Ω

Notes:1. Maximum voltage input +30V.

2. For sensors that require energising i.e.proximity detectors, switch contacts andthose with open collector outputs, terminals3 & 4 of the BA377NE Timer should belinked together.

3. For the Timer to function correctly, the inputsignal must fall below the lower switchingthreshold and rise above the higherswitching threshold for the minimum timesshown in the debounce section 6.5.6 below.

6.5.6 Debounce: dEbouncE

dEbouncE is an adjustable sub-menu in the inPut

function which prevents the Timer mis-functioningwhen the input has noisy edges, such as thoseresulting from a mechanical contact closing andbouncing. Three levels of protection may beselected and the amount of debounce applieddepends upon the type of Timer input that has beenselected in the inP . tYPE function.

The following table shows the minimum time that theinput signal must be continuously above the upperinput switching threshold and continuously below thelower switching threshold to ensure that the Timerprocesses the input signal. Input switchingthresholds are shown in section 6.5.5.

Debouncelevel

Min input pulse width

Type of Input

Contact All others

Default 1600µs 40µs

Heavy 3200µs 350µs

Light 400µs 5µs

23

6.5.7 Lower display: di5P-2

The configuration of the lower display which has six12mm high digits, depend upon whether the repeattimer function CYCLE5, which can repeat the timingperiod up to 99 times or continuously with aconfigurable delay between periods, is enabled.The configuration options are:

CYCLE5 disabledThe lower display shows the set time 5ET t

or the lower display may be disabled.

CYCLE5 enabledThe lower display shows the total number ofrepeat cycles requested together with thecurrent cycle number. During theconfigurable delay between cycles thedisplay times-down from the requesteddelay time to zero. Each operation may bebriefly named at it's start or periodicallythroughout the cycle.The lower display may also be disabled ifnot required.

To check or change the configuration of the lowerdisplay select di5P-2 from the configuration menuand press ( which will reveal the existing settingwhich can be changed by pressing the * or &

button followed by the ) button to enter theselection and return to the configuration menu.

If the CYCLE5 function is not enabled thefollowing two options are available:

5td Lower display shows the Timer's settime 5Et t, from which the BA377NEwill time-up or time-down dependingupon the direction of count selected inthe uP or dn function.

oFF Lower display disabled.

If the CYCLE5 function is enabled the followingthree options are available:

5td Lower display shows the number ofcycles requested together with thecurrent cycle number. During theconfigurable delay period the displaytimes-down from the requested delay tozero. A brief notification of timer statusi.e. CYCLE or dELAY is shown at start ofeach period.

02 - 11Current Number of cyclescycle requested, not shown

number when cycle is continuously repeated.

LabEL Exactly the same as 5td, but timerstatus i.e. CYCLE or dELAY is shownperiodically.

oFF Lower display disabled.

6.5.8 Starting & stopping the Timer: 5tAr5toP

The Timer may be started and stopped by a sensorinput signal or by operation of the front panel * or& push buttons.

To check or change the control of the Timer, select5tAr5toP from the configuration menu and press (

which will reveal the existing setting which can bechanged by pressing the * or & button followedby the ) button to enter the selection and return tothe configuration menu. Options available are:

Voltage inputs or control from front panelDisplay Start Stop

ControL 1 Input high Input lowControL 2 Input low Input highLoCAL & button * button

Contact and open collector inputsDisplay Start Stop

ControL 1 Open ClosedControL 2 Closed Open

Proximity detector inputDisplay Start Stop

ControL 1 Low current High currentControL 2 High current Low current

6.5.9 Units of display: unit5

Defines the format of all displayed times, except thedelay time of the optional control outputs which isshown in seconds and the grand total which isshown in hours and tenths of an hour.

To check or change the units of display, select unit5

from the configuration menu and press ( whichwill reveal the existing setting. The required unitscan be selected by pressing the * or & buttonfollowed by the ) button to enter the selection andreturn to the configuration menu. The optionsavailable are shown below:

Display12 : 00 : 00 Hours, minutes & seconds12 : 00 Hours & minutes* 30 : 00 Minutes & seconds 30 Seconds

* Only available when time in seconds specified inany Timer function is zero or divisible by 60.

The Timer's maximum elapsed time in any format isequivalent to 99 hours, 59 minutes & 59 seconds.

24

25

26

6.5.10 Set time: 5Et t

This is the Timer's setpoint. When controlling anexternal event via the optional control outputs theBA377NE will time-down from the set time to zero ortime-up from zero to the set time.

To check or change the set time, select 5Et t fromthe configuration menu and press ( which willreveal the existing setting with the most significantdigit flashing. The flashing digit may be adjusted bypressing the * or & button followed by the( button to transfer control to the next digit. Whenset as required, enter the selection and return to the5Et t prompt in the configuration menu by operatingthe ) button.

Note: If 5Et t is zero the Timer will not functionwhen an external start input is received or the &

button is operated.

6.5.11 Repeat timing cycle: CYCLE5

This powerful function which allows the BA377NEtiming cycle to be repeated up to 99 times orcontinuously with a configurable delay betweencycles of up to 99 hours, 59 minutes & 59 seconds.

To check or adjust the repeat timing cycle, selectcycle5 from the configuration menu and press( which will enter a sub-menu containing threesub-functions, EnbL, CYCL Cnt and r5t dELA whichare described in the following sections.

6.5.12 Cycle function enable: EnbL

This sub-function allows the repeat timing cycle tobe enabled or disabled without altering any of therepeat timing cycle parameters. To check or changethe function select EnbL from the repeat timing cyclesub-menu and press ( which will reveal if therepeat cycle function is on or oFF. The setting canbe changed by pressing the & or * buttonfollowed by the ) button to return to the repeattiming cycle sub-menu.

6.5.13 Cycle count: cycl cnt

This sub-function defines the number of times thatthe timer cycle is repeated. It may be set to anynumber between 1 and 99, or to 00 for continuousrepetition.

To check or change the function select cycl cnt

from the repeat timing cycle sub-menu and press (

which will reveal two digits with the most significantflashing. The flashing digit may be adjusted bypressing the * or & button followed by the( button to transfer control to the next digit. Whenset as required, enter the selection and return to thecycl cnt prompt in the sub-menu by operating the) button.

6.5.14 Restart delay: r5t dela

This sub-function defines the time delay betweenrepeat timing periods. It is shown in the formatselected in the units function and may be set to anytime between zero and the maximum time allowed inthe selected format.

Time format Maximum delayselected in

unit5

12 : 00 : 00 99 : 59 : 59

12 : 00 99 : 59

30 : 00 5999 : 59

30 359999

To check or change the reset delay time selectr5t dela from the repeat timing cycle sub-menu andpress ( which will reveal the delay time in theselected format with the most significant digitflashing. The flashing digit may be adjusted bypressing the * or & button followed by the( button to transfer control to the next digit. Whenset as required, enter the selection and return to ther5t dela prompt in the sub-menu by operating the) button.

Can also be adjusted from the Timer display mode,see 6.5.15

6.5.15 Adjusting the set time 5Et t and restartdelay r5t dela from the display mode:AC5Et t

When this function is enabled the Timer's set time5Et t and restart delay r5t dela can be adjustedfrom the display mode by simultaneously operatingthe ( and * push buttons. Thus allowing anoperator to adjust these parameters without havingaccess to the instrument's configuration menu. Thefunction contains two sub-functions, EnbL whichactivates the function and ACCd which defines aseparate code for access to 5Et t with the Timer inthe display mode.

To check or change the function, select AC5Et t inthe configuration menu and press ( which willreveal the EnbL prompt, pressing ( again will showif the function is on or oFF. If adjustment of the settime from the display mode is not required press the* or & button to select off and then press )

twice to return to the configuration menu. If thefunction is required, select on and press ) to returnto the EnbL prompt from which ACCd, which allows aseparate access code to be entered, can beselected by pressing the * or & button.

Access to 5Et t and r5t dela from the display modemay be protected by a four digit alphanumericsecurity code which must be entered to gain access.Default security code 0000 allows unrestrictedaccess.

27

With ACCd displayed, press ( to enter a newaccess code. The Timer will display 0000 with onedigit flashing. The flashing digit may be adjustedusing the * or & push button, when set asrequired operating the ( button will transfer controlto the next digit. When all the digits have beenentered press ) twice to return to the AC5Et t

prompt in the configuration menu. The revisedaccess code will be activated when the BA377NE isreturned to the display mode.

Please contact BEKA associates sales department ifthe access code is lost.

6.5.16 Direction of count: uP or dn

The Timer may be configured to time-up from zeroto the set time 5Et t while displaying elapsed time,or to time-down from the set time 5Et t to zero whiledisplaying the remaining time.

When the repeat timing cycle function CYCLE5 isenabled, it is recommended that a down count isselected so that the progress of the timer can beobserved with a known completion time i.e zero. Ifset as an up counter, elapsed will be displayed, but5et t at which the Timer will stop is not shown.

To check the direction of count, select uP or dn fromthe configuration menu and press ( which willreveal the existing setting which can be changed bypressing the * or & button followed by the )

button to enter the selection and return to theconfiguration menu.

6.5.17 Power Fail: P-FAiL

Defines how the Timer powers-up and functionswhen power is restored after a power supplyinterruption. Three options are available, idle,Pau5e and continue.

idle The Timer is stopped in the state it achieveswhen it has timed-up to 5et t or timed-downto 0000,,with the elapsed or remaining timewhen power was lost shown on the upperdisplay. The Timer must be reset before itcan be restarted. If the repeat timing cycleis in use the number of cycles completedwill be lost when the Timer is reset.

Pau5e The Timer is stopped in the state it achievesfollowing receipt of a stop input to pausetiming. The elapsed or remaining time whenpower was lost is shown on the upperdisplay. Timing resumes when a startinstruction is received. If a start input existswhen power is restored timing will startimmediately.

Continue When power is restored the Timer willcontinue from where it stopped without anymanual intervention. To check or changethe function, select P-fail from theconfiguration menu and press ( which willreveal the existing setting which can bechanged by pressing the * or & buttonfollowed by the ) button to enter theselection and return to the configurationmenu.

6.5.18 Local reset: LoC r5Et

The Local reset function contains two separate sub-functions rE5Et . enbl and clr Gtot which whenenabled allow the Timer and the grand total to bereset via the instrument's front panel push buttonswhile the Timer is in the display mode.

6.5.19 Local total reset: r5Et . enbl

r5Et . enbl is a sub-function in the Loc r5Et functionwhich when activated allows an operator to reset theTimer from the display mode by operating the *

and & push buttons simultaneously for more thanthree seconds.

To check or change the local total reset selectLoC r5Et in the configuration menu and press( which will reveal the r5Et . enbl prompt, press (

again to show if the local total reset is on or oFF. Ifset as required operate the ) button twice to returnto the configuration menu, or the * or & button tochange the setting followed by the ) button twiceto enter the change and return to the LoC r5Et

prompt in the configuration menu.

Note:The Timer may also be reset remotely byconnecting terminals RS1 and RS2 togetherfor more than one second. See section 3.3

6.5.20 Local grand total reset: Clr Gtot

The grand total is the total run-time of the Timer thatmay be viewed by operating the ) and * pushbuttons simultaneously in the display mode. Whenactivated clr Gtot allows an operator to reset thegrand total display to zero from the display mode byoperating the ) and * push buttonssimultaneously for more than ten seconds.

Clr Gtot is a sub-function in the LoC r5Et menu. Tocheck or change the setting select LoC r5Et in theconfiguration menu and press ( which will revealrE5Et enbl. Using the & or * button selectClr Gtot and press ( which will show if local grandtotal reset is on or oFF. If set as required operatethe ) button twice to return to the configurationmenu, or the & or * button to change the settingfollowed by the ) button twice to enter the changeand return to the LoC r5Et prompt in theconfiguration menu.

28

6.5.21 Control output 1 (optional): op1

Control output 1 is an optional factory fitted,galvanically isolated solid state switch contact whichcan be configured to turn on and off when the Timerenters a specified states. When control output 1 ison the '1' annunciator on the Timer display isactivated.

The function contains four sub-functions, EnbL,op1 on, op1 oFF and op1 dELA. To gain access to thesub-menu select op1 in the configuration menu andpress ( which will show the EnbL prompt fromwhich the other sub-functions can be accessedusing the & or * button.

Control output 1 may be configured to turn on whenthe Timer enters a selected Timer state and to turnoff when the Timer enters another specified Timerstate. e.g. if run is selected in the op1 on sub-function and done is selected the op1 off function.Control output 1 will turn on when the Timer entersthe run state and will stay on until the Timer entersthe done state. Alternatively, the control outputphase may be reversed by selecting the n statessuch as n re5et.

If control output 1 is required to be on in only oneTimer state, this can be achieved with the followingconfiguration.

op1 on state required e.g. run

op1 off n state required e.g. n run

In this example when the Timer enters the run statecontrol output 1 turns on. When the Timer movesfrom the run to any other state, control output 1turns off.

The Timer configuration example in section 7.2 ofthis manual illustrates the use of the control outputs.Further examples can be found in Application GuideAG374 which is available on the BEKA website.

6.5.22 Control output 1 enable: EnbL

This function allows control output 1 to be enabledor disabled without altering any other control outputparameters. To check or change the function selectEnbL from the control output 1 sub-menu and press( to reveal if control output 1 is on or oFF. Thesetting can be changed by pressing the & or *

button followed by the ) button to return to thecontrol output 1 sub-menu.

6.5.23 Control output 1 on at : op1 on

Control output 1 may be configured to turn on whenthe Timer enters in any one of the five Timer states.Alternatively, the control output 1 phase may bereversed, by selecting an n state which will causethe control output to turn on when the Timer entersany other than the specified Timer state. Timerstates are shown in Fig 12.

To define when control output 1 turns on selectop1 on from the sub-menu and press ( to show theexisting setting. Pressing the & or * button willscroll through the options:

Display Control output 1 turns on when Timer enters selected state

re5et Reset state run Running statepau5ed Paused statedelay Restart delay statedone Complete state

Control output 1 turns on when Timer enters any other than the selected state

n re5et Reset state n run Running staten pau5ed Paused staten delay Restart delay staten done Complete state

When the required setting has been selected press) to enter the selection and return to the sub-menu.

29

6.5.24 Control output 1 off at: op1 off

Control output 1 may be configured to turn off whenthe Timer enters any one of the five Timer states.Alternatively, the phase of control output 1 may bereversed, by selecting an n state which will causethe control output to turn off when the Timer entersany other than the specified Timer state. Timerstates are shown in Fig 12.

To define when control output 1 turns off selectop1 off from the sub-menu and press ( to showthe existing setting. Pressing the & or * buttonwill scroll through the options:

Display Control output 1 turns off when Timer enters selected statere5et Reset state run Running statepau5ed Paused statedelay Restart delay statedone Complete state

Control output 1 turns off when Timer enters any other than the selected state

n re5et Reset state n run Running staten pau5ed Paused staten delay Restart delay staten done Complete state

When the required setting has been selected press) to enter the selection and return to the controloutput 1 sub-menu.

6.5.25 Control output 1 on delay time: op1 dELA

Control output 1 may be delayed from turning on

(output closed) for a fixed time following the selectedcondition occurring. e.g. when the Timer enters therun state. This delay is useful for many controlapplications, for example when the control output isconnected to the reset terminals RS1 and RS2 toautomatically reset the BA377NE Timer.

The delay can be adjusted in 1 second incrementsup to 32,400 seconds, which is 9 hours. If a delay isnot required zero should be entered. To adjust thedelay select op1 dELA from the control output 1 sub-menu and press ( which will reveal the existingdelay time with one digit flashing. The flashing digitcan be adjusted using the & or * button and the( button to move to the next digit. When therequired delay has been entered, press ) to returnto the control output 1 output sub-menu.

6.5.26 Control output 2 (optional): op2

Control output 2 is an optional, galvanically isolatedsolid state switch contact which can beindependently configured to turn on and off whenthe Timer is any of it's five states. It's functionsand configuration are identical to control output 1described in sections 6.5.21 to 6.5.25

The control output status is shown by the '2' controloutput display annunciator on the instruments frontpanel.

6.5.27 Reset grand total from within theconfiguration menu: Clr Gtot

The grand total is the total run-time of the Timer thatmay be viewed by operating the ) and * pushbuttons simultaneously in the display mode.

The grand total can be reset to zero from within theconfiguration menu using this Clr Gtot function, orfrom the display mode if Clr Gtot is activated in thelocal grand total clear function - see 6.5.20

To zero the Timer grand total from within theconfiguration menu select Clr Gtot and press( which will cause the instrument to display Clr . no

with no flashing. Press the & or * push buttonuntil Clr . YE5 is displayed and then press ( whichwill result in a 0000 prompt being displayed with thefirst digit flashing. This is a request for theinstruction to be confirmed by entering 5urE usingthe & and * buttons to adjust the flashing digitand the ( button to move control to the next digit.Pressing ) will then reset the grand total to zeroand return the Timer to the configuration menu.

Note: Once reset, the grand total can not berecovered.

30

6.5.28 Security code: CodEAccess to the instrument configuration menu may beprotected by a four digit alphanumeric security codewhich must be entered to gain access. Newinstruments are configured with the default securitycode 0000 which allows unrestricted access to allconfiguration functions.

To enter a new security code select CodE from theconfiguration menu and press ( which will causethe Timer to display 0000 with one digit flashing.The flashing digit may be adjusted using the * and& push button, when set as required operating the( button will transfer control to the next digit.When the new security code has been enteredpress ) to return to the CodE prompt. The revisedsecurity code will be activated when the Timer isreturned to the display mode.

Please contact BEKA associates sales department ifthe security code is lost.

6.5.29 Reset configuration to Timer factory defaults: r5Et dEF

When the BA377NE is configured as a Timer thisfunction resets the instrument to the Timer factorydefaults shown in sections 6.5

To reset the configuration select r5Et dEF from theconfiguration menu and press (. The BA377NEwill display 0000 with the first digit flashing which is arequest to confirm the instruction by entering 5urE.Using the * or & button set the first flashing digitto 5 and press ( to transfer control to the seconddigit which should be set to u. When 5urE has beenentered pressing the ) button will reset all theconfiguration functions and return the instrument tothe display mode.

Note:r5Et dEF does not reset the grand total tozero.

7. TIMER APPLICATION EXAMPLESThis section illustrates three common applicationsfor the BA377NE when configured as a Timer.

7.1 Measuring the time that a contact is closed.

In this example a BA377NE is required to display thetime that a Zone 2 contact is closed. The display isrequired in hours and minutes within the hazardousarea and is to be reset to zero by a push buttonlocated in the same hazardous area, not by theinstrument front panel push buttons. The operatoris required to zero the grand total by operating the) + * buttons simultaneously. No securitycodes are required to protect access to theconfiguration menu or to the grand total reset.When power is restored after a supply interruptionthe Timer is to resume normal operation withoutmanual intervention.

Figure 14 shows the wiring for the BA377NE.

Fig 14 Wiring for displaying time a contact is closed

The required instrument configurations for thisexample are shown below.

Function Display SettingAccess code CodE 0000


Input inPut ContACt

Terminals 3 & 4 linked to energise inputdebounce dEbounCE dEFAuLt

Display 2 di5P-2 oFF

Start stop 5tAr5toP ControL 2

Units unit5 12 : 00

Set time 5Et t 9999 : 99 : 99

Direction of count up or dn up

Power fail p-fail continue

Local total reset r5Et . EnbL oFF

Local grand total reset Clr Gtot on

31

7.2 Controlling an Ex nA solenoid valveThe BA377NE Timer is required to open an Ex nsolenoid valve for 5 minutes when an externalcontact is closed. 55 minutes after the valve isclosed it is to be opened again for another 5 minuteperiod. This process is to be repeated 10 times afterwhich the Timer is to automatically reset so that isready to start the next 10 cycles when the externalcontact is closed.

In this example illustrated in Fig 15, control output 2has been wired to the timer reset terminals andconfigured with a five seconds control output delayafter the solenoid valve has closed for the tenthtime. Therefore five seconds after the tenth cyclehas been completed the system automatically resetsand is ready for the next timing cycle to be initiated.

The lower display is required to show timer status atthe start of each period.

After a power interuption the timer is required toresume operation from the point at which it stoppedwhen the start button is operated.

Fig 15 Control of Ex nA solenoid valve in a hazardous area.

The required instrument configuration for thisexample are shown below.

Function Display SettingAccess code CodE 0000


Input inP . type ContACt

debounce dEbounCE dEFAuLt

Display 2 di5P-2 5td

Start stop 5tAr5toP ControL 2

Units unit5 12 : 00

Set time 5Et t 00 : 05

Timer repeat cycle CYCLE5

Cycle function enable EnbL on

Cycle count cycl cnt 10

Reset delay r5t dela 00 : 55

Access set time from AC5Et - t oFF

display mode.Direction of count uP or dn uP

Power failure p-fail pau5e

Local total reset rE5Et . EnbL on

Local grand total reset CLr Gtot oFF

Enable control output 1 EnbL on

Control output 1 on at oP1 on run

Control output 1 off at oP1 oFF n run

Control output 1 delay oP1 dELA 00000

Enable control output 2 EnbL on

Control output 2 on at oP2 on done

Control output 2 off at oP2 oFF re5et

Control output 2 delay oP2 dELA 00005

In this example local total reset rE5Et . EnbL is on.This enables the Timer to be reset when power isfirst connected by operating the * and & downbutton simultaneously for more than 3 seconds.

32

8. MAINTENANCE when configured as a Timer

8.1 Fault finding during commissioningIf a BA377NE fails to function as a Timer duringcommissioning the following procedure should befollowed:

Symptom Cause Check:

No display No powersupply, or

incorrect wiring.Note: Terminals2, 6 & RS2 areinterconnected

within theinstrument.

That there isbetween 10 and

30V onterminals 1 & 2with terminal 1

positive.

Instrumentconfiguration

menu does notcorrespond withTimer section of

this manual.

BA377NE maybe configured as

a clock.

That FunCtion in configurationmenu is set toELAP5E not to

CloC.

Timer will notstart.

Timer not reset

Set time 5Et t

has not beenentered.

Reset timer viaexternal contactor by operating

* and &buttons

simultaneously ifthe local total

reset r5Et enbL

has beenactivated.

Enter a value for5Et t' other than

zero.

Timer will notrespond to

external input.

Input incorrectlyconfigured, or

sensorincorrectlyconnected.

Inputconfiguration

and inputenergising link is

correctly fittedfor selected

sensor.

Control output(s)do not function.

Control outputshave not been

enabled.

Enable ControlOutput(s) in the

configurationmenu.

Unable to enterconfiguration

menu.

Incorrect securitycode

That the correctsecurity code is

being used.

Contact BEKA ifcode is lost.

8.2 Fault finding after commissioningEN 60079-17 Electrical installations inspection andmaintenance permits live maintenance in Zone 2 if arisk analysis demonstrates that this does notintroduce an unacceptable risk. The removal ofcovers [opening of Ex n enclosure] is permitted ifthis can be done without contaminating the interiorof the instrument with dust or moisture. Some end-users may prefer not to permit live maintenance tominimise risk.

ENSURE PLANT SAFETY BEFORESTARTING MAINTENANCE

Live maintenance within the hazardous areashould only be performed when it ispermitted by risk analysis, or when there isno risk of a flammable atmosphere beingpresent.

If a BA377NE fails after it has been functioningcorrectly, the following table may help to identify thecause of the failure.


No display No power supply That there isbetween 10 and

30V onterminals 1 & 2with terminal 1

positive.

Timer will notstart.

Timer not reset

Reset terminalsRS1 & RS2 arelinked which will

inhibit Timer.

Reset timer viaexternal contactor by operating

* and &buttons

simultaneously iflocal total resetrE5Et . EnbL hasbeen activated.

Remove link.

Control output(s)do not function.

Control Outputshave not been

enabled.


configurationmenu.

Unable to enterconfiguration

menu.



being used.Contact BEKA if

code is lost.

33

If this procedure does not reveal the cause of thefault, it is recommended that the instrument isreplaced.

Note:If configuration changes are made to Input,5tart5top, cycle5, up or dn, op1 or op2

functions the Timer will be forced into a failsafe idle condition. This stops the Timer inthe state it achieves when it has timed-up to5et t or timed-down to 0000. The Timermust be reset before it can be restarted.

8.3 ServicingWe recommend that faulty BA377NE Timers arereturned to BEKA associates or to our local agent forrepair. It is helpful if a brief description of the faultsymptoms is provided.

8.4 Routine maintenanceThe mechanical and electrical condition of theinstrument should be regularly checked. Inspectionfrequency should be chosen to suit theenvironmental conditions.

8.5 GuaranteeInstruments which fail within the guarantee periodshould be returned to BEKA associates or our localagent. It is helpful if a brief description of the faultsymptoms is provided.

8.6 Customer commentsBEKA is always pleased to receive comments fromcustomers about our products and services. Allcommunications are acknowledged and wheneverpossible, suggestions are implemented.

34

9. OPERATION AS A CLOCKWhen configured as a clock the BA377NE candisplay local time in a variety of twelve or twenty fourhour formats. The displayed time can be adjustedvia the front panel push buttons which may beprotected by a user definable four digit security codeto prevent unauthorised or accidental adjustment.

The clock may be synchronised to an external timestandard via the instrument's reset terminals. Whenthese two terminals are connected together by anexternal switch contact, the clock display will bereset to a preconfigured time and will resumerunning from this time when the contacts areopened.

When fitted with the optional galvanically isolatedcontrol outputs the clock can be configured to turneach solid state output on and off twice during eachtwenty four hour period.

Fig 16 shows a simplified block diagram of theBA377NE configured as a clock.

The instrument can be supplied with the followingfactory fitted accessories:

Backlight Internally powered

Dual isolated control outputs

Fig 16 BA377NE block diagram with clockconfiguration.

9.1 Initialisation and loss of powerEach time power is applied to a BA377NEinitialisation is performed. After a short delay thefollowing display sequence occurs:

All segments of the display are activated

Instrument starts functioning using theconfiguration stored in the instrument'spermanent memory.

Following initialisation, the instrument will display aflashing display which is a request for the local timeto be entered. The clock will not start to functionuntil a display time has been entered, or the remotereset contacts are closed and opened tosynchronise the clock to a preconfigured time.

If during normal operation the power supply isinterrupted for more than 30ms, the display willreturn to the flashing condition and the display timewill have to be re-entered. Longer interruptions maybe tolerated by powering the Clock from a lightlyloaded instrument supply with large outputcapacitance.

9.2 Controls when configured as a clock The BA377NE clock is configured and adjusted viafour front panel push buttons. In the display modei.e. when the instrument is displaying time, the pushbutton functions are:

( + & Shows in succession, firmwareversion number, instrument functionCLoc and output accessories thatare fitted:

-A Dual Control Outputs

( + ) Access to configuration menu

Note: When optional control outputs are fitted, theBA377NE Clock may be configured to provide directaccess to the control output on and off times fromthe display mode when the ( and * push buttonsare operated simultaneously. - see section 9.4.13

9.3 Displays when configured as a clockThe BA377NE clock has a single digital display plusannunciators.

Time Shows time in selected 12 ordisplay 24 hour format.

Reset Activated while clock is beingannunciator synchronised and external

reset contacts are closed.

Control output Show status of both optionalannunciators control output.

35

9.4 Configuration as a clockThe BA377NE is configured and calibrated via fourfront panel push buttons. All the configurationfunctions are contained in an easy to use intuitivemenu that is shown diagrammatically in Fig 17.

Each menu function is summarised in section 9.4.2of this manual and each includes a reference tomore detailed information.

All new BA377NE instruments are suppliedconfigured as requested at the time of ordering. Ifconfiguration is not requested, the BA377NE will besupplied with default Timer configuration as shownin section 6.5.

If a BA377NE Clock is requested without detailedconfiguration information, the instrument willsupplied with default Clock configuration as shownbelow, but can easily be re-configured on-site.

Default Clock Configuration

Function Display DefaultAccess code CodE 0000

Function FunCtion CLoC

Display di5PLAY 12 : 00

Syncronise time 5YnC t A 12 : 00 : 00

Enable control output 1* EnbL oFF

Enable control output 2* EnbL oFF

Enable access alarm AC5P oFF

times from display mode.Access code for alarm ACCd 0000

times from display mode.

Note: * Control outputs are an option

9.4.1 Accessing configuration functionsThroughout this manual push buttons are shown as&, *, ( and ) and legends displayed by theClock are shown in a seven segment font as theyappear on the instrument e.g. di5PLAY and CodE.

Access to the configuration menu is obtained byoperating the ( and ) push buttonssimultaneously. If the instrument is not protected byan access security code the first parameterFunCtion will be displayed. If a security code otherthan the default code 0000 has already beenentered, the instrument will display CodE. Press( to clear this prompt and enter the security codefor the instrument using the & or * push button toadjust the flashing digit, and the ( push button totransfer control to the next digit. If the correct codehas been entered pressing ) will cause the firstparameter FunCtion to be displayed. If an incorrectcode is entered, or a push button is not operatedwithin ten seconds, the instrument will automaticallyreturn to the display mode.

All configuration functions and prompts are shownon the upper eight digit display.

Once within the main configuration menu therequired function can be selected by scrollingthrough the menu using the & and * pushbuttons. The Clock configuration menu is showndiagrammatically in Fig 17.

When returning to the display mode followingreconfiguration, the Clock will display dAtA followedby 5AVE while the new information is stored inpermanent memory.

36

37

9.4.2 Summary of Clock configuration functions.

This section summarises all the Clock configurationfunctions. When read in conjunction with Fig 17 itprovides a quick aid for configuring the Clock. Ifmore detail is required, each section of thissummary contains a reference to a full description ofthe function.


FunCtion Instrument functionDefines the function of the instrument.May be set to:

ELAP5E TimerCloC Clock

All the entries in this Clockconfiguration summary assume thatthe BA377NE is configured as a Clockby selecting CLoC.See section 9.4.3

di5PLAY Display formatDefines the clock display format, fouralternatives are available.Select:

12 : 00 : 00 Twelve hours with seconds12 : 00 Twelve hours without seconds24 : 00 : 00 Twenty four hours with seconds24 : 00 Twenty four hours without secondsSee section 9.4.4

5Et Set clock display timeEnables the clock displayed time to beadjusted, the clock resumes operationwhen the instrument is returned to thedisplay mode.See section 9.4.5

5YnC t Synchronising timeDefines the time to which the clockdisplay is set when the reset terminalsRS1 and RS2 are connected together.The Clock restarts from thesynchronising time when terminalsRS1 and RS2 are disconnected.See section 9.4.6


oP1 Control output 1 (Optional)Control output 1 can turn on (outputclosed) and off (output open) twice ineach twenty-four hour period. Thisfunction contains five sub-function:

EnbL Enables output 1 and defines ifit turns on and off once or twicein each 24 hours.

oP 1 : on 1 Time when oP 1 turns on 1st timeoP 1 : oFF 1 Time when oP 1 turns off 1st timeoP 1 : on 2 Time when oP 1 turns on 2nd timeoP 1 : oFF 2 Time when oP 1 turns off 2nd timeSee section 9.4.7 to 9.4.9

oP2 Control output 2 (Optional)As control output 1 described above.See section 9.4.10 to 9.4.12

AC5P Access control output alarm-timesfrom display mode.Contains two sub-functions, EnbL whichwhen activated allows the control outputtimes to be adjusted from the displaymode (displaying time). The secondsub-function ACCd defines a four digitalphanumeric access code which maybe used to protect access to the alarm-times from the display mode. Defaultcode 0000 disables this security featureand allows unrestricted access.See section 9.4.13

CodE Security codeDefines a four digit alphanumeric codethat may be used to protect access tothe Clock configuration menu. Defaultcode 0000 disables this security functionand allows unrestricted access to allconfiguration functions when the ( and) buttons are operated simultaneouslyin the display mode.See section 9.4.14

r5Et dEF Reset to factory defaultsResets the BA377NE to the factorydefault configuration shown in section9.4 when YE5 is selected and confirmedby entering 5uRE.See section 9.4.15

38

9.4.3 Instrument function: FunCtion

The BA377NE may be configured as a Timer or as aClock. This section of the instruction manualdescribes the Clock configuration, for details ofTimer configuration see section 6.5.

To reveal the existing function of the instrumentselect FunCtion from the configuration menu andpress (. If CLoC is displayed, the instrument isalready configured as a Clock therefore press ) toreturn to the FunCtion prompt in the configurationmenu. If ELAP5E is displayed, press the * or &

button to change the setting to CLoC followed by the( button which will result in a 0000 prompt beingdisplayed with the first digit flashing. This is arequest for the instruction to be confirmed byentering 5urE using the * or & button to adjustthe flashing digit and the ( button to move controlto the next digit. When 5urE has been entered,pressing ) will change the instrument to a Clockand return the instrument to the display mode. Toconfigure the Clock enter the configuration menu bypressing the ( and ) buttons simultaneously untilfunction is displayed.

9.4.4 Display format: di5PLAY

The BA377NE Clock may be configured to displaytime in a 12 or 24 hour format with or withoutseconds. When a 12 hour format is selected, AM isdenoted by an A prefix at the left hand side of thedisplay, similarly a P is displayed to denote PM.

To check or change the display format of the clock,select di5PLAY from the configuration menu andpress ( which will reveal the existing setting whichcan be changed by pressing the * or & buttonfollowed by the ) button to enter the selection andreturn to the configuration menu. The optionsavailable are shown below:

12 : 00 : 00 Twelve hour format with seconds12 : 00 Twelve hour format without seconds24 : 00 : 00 Twenty four hour format with seconds24 : 00 Twenty four hour format without seconds

9.4.5 Set clock display time: 5Et

This function sets the time displayed by the Clockwhich must be entered each time the BA377NEClock is powered. Until a set time is entered theClock will display a flashing 00 : 00 : 00 or 00 : 00 for 24hour formats, or A12 : 00 : 00 or A12 : 00 for 12 hourformats.

To adjust the clock set time, select 5Et from theconfiguration menu and press ( that will show00 : 00 : 00 or the existing set time with the hoursflashing. When setting the clock display timeseconds are always shown.

Using the * or & button adjust the flashing hoursand then press ( to transfer control to the minutesdisplay, pressing ( again will transfer control to theseconds display. When the clock display time hasbeen adjusted press ) to start the Clock and returnto the 5Et prompt in the configuration menu.

9.4.6 Enter synchronising time: 5YnC t

When the external reset terminals RS1 and RS2 areconnected together the clock is stopped and thedisplayed time is set to the synchronising time.When the connection between the reset terminals isremoved, the clock restarts from the synchronisingtime. This function enables the BA377NE clock tobe synchronised with a master clock.

To enter the synchronising time, select 5YnC t fromthe configuration menu and press ( which willreveal the existing synchronising time with the hoursflashing. Using the * or & button adjust thehours and then press ( to transfer control to theminutes display, pressing ( again will transfercontrol to the seconds display. When thesynchronising time has been set as required, press) to return to the configuration menu.


Control output 1 is an optional factory fittedgalvanically isolated solid state switch contact outputwhich can be configured to turn on (output closed)and off (output open) twice in each twenty-four hourperiod. The control output status is shown by the 1control output display annunciator.

Function oP1 contains a sub-menu with five sub-functions:

EnbL Number of times output 1turns on & off in 24 hours.

oP 1 : on 1 First time oP 1 turns on (closes)oP 1 : oFF 1 First time oP 1 turns off (opens)oP 1 : on 2 Second time oP 1 turns on (closes)oP 1 : oFF 2 Second time oP 1 turns off (opens)

To check or change the function of Control output 1select oP1 from the configuration menu and press( which will reveal the first sub-function EnbL.

39

9.4.8 Enable Control output 1: EnbL

This is a sub-function in the Control output 1 functionoP1 which allows output 1 to be enabled or disabledwithout changing any of the on or off times and alsodetermines whether output 1 turns on and off onceor twice in each twenty four hour period.

Select oP1 in the configuration menu and press (

which will result in the EnbL prompt being displayed.Pressing ( again will enter the sub-function fromwhich one of the three options may be selectedusing the * or & button:

Display Control output 1oFF Control output 1 disabledon : 1 Turns on & off once per 24 hourson : 2 Turns on & off twice per 24 hours

When the required option is displayed operating )

will enter the selection and return to the EnbL promptfrom which another sub-function may be selected ifcontrol output 1 has not been disabled.

9.4.9 On and off times: oP 1 : on 1; oP 1 : off 1

oP 1 : on 2; oP 1 : off 2

The control output will have one or two on and offtimes depending upon whether control output 1 hasbeen configured to turn on and off once or twice ineach 24 hour period. - see 9.4.8.

All of the times are adjusted in the same way. Toadjust any of them select oP1 from the configurationmenu and press ( which will result in the EnbL

prompt being displayed. The * or & button willscroll through the sub-functions. Only oP 1 : on 1 andoP1 : oFF1 will be present if control output 1 has beenconfigured to switch on and off once in a 24 hourperiod in the EnbL sub-function.

Select the required sub-function

oP1 : on1 Time oP1 turns on first timeoP1 : oFF1 Time oP1 turns off first timeoP1 : on2 Time oP1 turns on second timeoP1 : oFF2 Time oP1 turns off second time

When selected, pressing ( will show the existingtime with the hours flashing. Using the * or &

button adjust the hours and then press ( totransfer control to the minutes display, pressing (

again will transfer control to the seconds display.When the time has been set as required press ) toreturn to the sub-menu from which another on andoff times may be selected for adjustment. When allthe on and off times have been entered, return to theconfiguration menu by pressing the ) button twice.

9.4.10 Control output 2 (Optional): oP2Control output 2 is an optional factory fitted outputwhich can be configured to turn on (output closed)and off (output open) twice in each twenty-four hourperiod. The control output status is shown by the 2control output display annunciator.

Function oP2 contains a sub-menu with five sub-functions:

EnbL Number of times output 2turns on & off in 24 hours.

oP 2 : on 1 First time when oP 2 turns on (closes)oP 2 : oFF 1 First time when oP 2 turns off (opens)oP 2 : on 2 Second time when oP 2 turns on (closes)oP 2 : oFF 2 Second time when oP 2 turns off (opens)

To check or change the function of Control output 2select oP2 from the configuration menu and press( which will reveal the first sub-funtion EnbL.

9.4.11 Enable control output 2: EnbL

This is a sub-function in the Control output 2 functionoP2 which allows output 2 to be enabled or disabledwithout changing any of the on or off times and alsodetermines whether output 2 turns on and off onceor twice in each twenty four hour period.Select oP2

in the configuration menu and press ( which willresult in the EnbL prompt being displayed. Pressing( again will enter the sub-function from which oneof the three options may be selected using the * or& button:

Display Control output 2oFF Control output 2 disabledon : 1 Turns on & off once per 24 hourson : 2 Turns on & off twice per 24 hours

When the required option is displayed operating )

will enter the selection and return to the EnbL promptfrom which another sub-function may be selected ifcontrol output 2 has not been disabled.

9.4.12 On and off times: oP2 : on 1; oP2 : off 1

oP2 : on 2; oP2 : off 2

The control output will have one or two on and offtimes depending upon whether control output 2 hasbeen configured to turn on and off once or twice ineach 24 hour period. - see 9.4.11.

All of the times are adjusted in the same way. Toadjust any of them select oP2 from the configurationmenu and press ( which will result in the EnbLprompt being displayed. The * or & button willscroll through the sub-functions. Only oP2 : on1 andoP2 : oFF1 will be present if control output 2 has beenconfigured to switch on and off once in a 24 hourperiod in the EnbL sub-function.

40

Select the required sub-function

oP2 : on1 Time oP2 turns on first timeoP2 : oFF1 Time oP2 turns off first timeoP2 : on2 Time oP2 turns on second timeoP2 : oFF2 Time oP2 turns off second time

When selected pressing ( will show the existingtime with the hours flashing. Using the * or &

button adjust the hours and then press ( totransfer control to the minutes display, pressing (

again will transfer control to the seconds display.When the time has been set as required press ) toreturn to the sub-menu from which another on / offtime may be selected for adjustment. When all theon / off times have been entered, return to theconfiguration menu by pressing the ) button twice.

9.4.13 Access control output on & off times from display mode: AC5P

This function activates a separate menu thatprovides direct access to the control output's on andoff times when the Clock is the display mode(displaying time). An operator may therefore adjustthe on and off times without having access to theinstrument configuration menu. Further protection isprovided by a separate security code. When thisfunction is enabled the on and off times of the twocontrol outputs may be adjusted from the displaymode by simultaneously operating the ( and *

push buttons. The function contains two sub-functions, EnbL which activates the function andACCd which defines a separate access code thatmay be used to prevent the on and off times beingaccidentally adjusted from the display mode.

To check or change the function, select AC5P in theconfiguration menu and press ( which will revealthe EnbL prompt, pressing ( again will show if thefunction is on or oFF. If adjustment of the controloutput times from the display mode is not requiredpress the * or & button to select off and thenpress ) twice to return to the configuration menu.If the function is required, select on and press ) toreturn to the EnbL prompt from which ACCd, whichallows a separate access code to be entered, canbe selected by pressing the * or & button.

Access to the control output times from the displaymode may be protected by a four digit alphanumericsecurity code which must be entered to gain access.Default security code 0000 allows unrestrictedaccess. With ACCd displayed, press ( to enter anew access code. The BA377NE Clock will display0000 with one digit flashing. The flashing digit maybe adjusted using the * or & push button, whenset as required operating the ( button will transfercontrol to the next digit. When all the digits havebeen adjusted press ) twice to return to the AC5P

prompt in the configuration menu. The revisedsecurity code will be activated when the BA377NE isreturned to the display mode.


Access to the instrument's configuration menu maybe protected by a four digit alphanumeric securitycode which must be entered to gain access. Newinstruments are configured with the default securitycode 0000 which allows unrestricted access to allconfiguration functions.

To enter a new security code select CodE from theconfiguration menu and press ( which will causethe Clock to display 0000 with one digit flashing.The flashing digit may be adjusted using the * and& push button, when set as required operating the( button will transfer control to the next digit.When all the digits have been adjusted press ) toreturn to the CodE prompt. The revised security codewill be activated when the Clock is returned to thedisplay mode.

Please contact BEKA associates sales department ifthe security code is lost.

9.4.15 Reset configuration to Clock factorydefaults:. r5Et dEF

When the BA377NE is configured as a Clock, thisfunction resets the configuration to the Clock factorydefaults shown in sections 9.4 of this manual.

To reset the instrument configuration selectr5Et dEF from the configuration menu and press (.The Clock will display 0000 with the first digitflashing which is a request to confirm the instructionby entering 5urE. Using the * or & button set thefirst flashing digit to 5 and press ( to transfercontrol to the second digit which should be set to u.When 5urE has been entered pressing the )

button will reset all the configuration functions to thefactory defaults and return the instrument to thedisplay mode as a Clock with default configuration.

41

10. CLOCK CONFIGURATION EXAMPLEIn this example a BA377NE is required to functionas a Clock. Time is to be displayed in a 24 hourformat including seconds. For externalsynchronisation the displayed time is required tochange to 12 : 00 : 00 when the external resetterminals are connected together.

Both control outputs are required to close and openonce in each 24 hour period. Control output 1 (oP1)is to turn on (close) at 07 : 30 : 00 and off (open) at09 : 30 : 00, control output 2 (oP2) is to turn on (close)at 18 : 00 : 00 and off (open) at 22 : 30 : 00.

For this application the operator needs to adjust thecontrol output on and off times from the displaymode via an access code of 1111. To preventtampering the instrument configuration menu is to beprotected by security code of 1209

10.1 Configuration procedureThe BA377NE may be configured as a Clock on-sitewithout disconnection from external wiring.

Step 1 Enter the configuration menuEnter the configuration menu bysimultaneously pressing ( and ).Assuming a security code has not alreadybeen entered the instrument will respond bydisplaying FunCtion which is the first item inthe configuration menu.See Fig 18.

Step 2 Configure instrument as a ClockWith FunCtion displayed press ( to revealthe existing function of the instrument. IfCloc is displayed no change is required,therefore return to the FunCtion prompt bypressing the ) button.If ELAP5E is displayed, press the * or &

button to change the setting to CLoC

followed by the ( button which will result ina 0000 prompt being displayed with the firstdigit flashing. This is a request for theinstruction to be confirmed by entering 5urE

using the & and * buttons to adjust theflashing digit and the ( button to movecontrol to the next digit. Pressing ) willthen change the instrument to a Clock andreturn the display to FunCtion in theconfiguration menu.

Step 3 Select display formatUsing the * or & button select di5PLAY inthe configuration menu and press ( whichwill reveal the current display format. Usingthe * or & button select 24 : 00 : 00 which isthe required 24 hour format with secondsand press ) to enter the selection andreturn to the configuration menu.See 9.4.4

Step 4 Enter the synchronisation timeUsing the * or & button select 5YnC t inthe configuration menu and press ( toreveal the current synchronisation time withthe hours flashing. Using the * or &

push button adjust the hours to 12 andpress ( to transfer control to the minutes.Using the * or & push button adjust theminutes to 00 and press ( to transfercontrol to the seconds which should beadjusted to 00, in the same way. When theseconds are set enter the selection andreturn to the 5YnC t prompt in theconfiguration menu by pressing the )

button.See 9.4.6

Step 5 Enable control output 1 and enter the onand off times.Using the * or & button select oP1 in theconfiguration menu and press ( to revealthe EnbL prompt in the control output 1 sub-menu.

In this application control output 1 isrequired to turn on and off once every 24hours. With EnbL displayed press ( andusing the * or & button select on 1

followed by the ) button to return to theEnbL prompt.

The control output on time should now beentered by selecting oP1 : on1 in the controloutput 1 sub-menu using the * or &

button. Pressing ( will reveal the existingon time which should be adjusted to 07 : 30 :

00 using the * or & button and the( button to transfer control to the followingdigits. When entered return to the oP1 :

on1 prompt by pressing the ) button.

The off time should now be entered byselecting oP1 : oFF1 from the sub-menu andadjusting the time to 09 : 30 : 00. Finally press) to return to the oP1 : oFF1 prompt in thesub-menu and press ) again to return tooP1 in the configuration menu.

42

Step 6 Enable control output 2 and enter the onand off times.Using the * or & button select oP2 in theconfiguration menu and press ( to revealthe EnbL prompt in the control output 2 sub-menu. Follow the procedure described instep 5 above, but set control output 2 to turnon at 18 : 00 : 00 and off at 22 : 30 : 00.

Step 7 Allow control output times to be adjustedfrom the display mode & enter separatesecurity code.Using the * or & button select AC5P inthe configuration menu and press ( toreveal the EnbL prompt, pressing ( againwill show if this function is on or oFF. Usingthe * or & button select on followed by) to return to the EnbL prompt. A separatesecurity code which must be entered to gainaccess to the alarm times in the operatingmode, is entered in the ACCd function whichmay be selected by operating the * or &

button once. Pressing ) will reveal theexisting access code with one digit flashing.This should be changed to the requiredcode of 1111 by adjusting the flashing digitusing using the * or & button and the (

button to transfer control to the next digit.When 1111 has been entered press )

twice to return to the configuration menu.

Step 8 Define the configuration menu securitycode.Defining a security code preventsunauthorised access to the configurationmenu. Using the & and * buttons selectCodE from the configuration menu and press( which will reveal 0000 with the first digitflashing. This example requires the securitycode to be 1209, using the & and *

buttons set the flashing digit to 1 and press( to transfer control to the second digit.When all have been entered press ) toreturn to the main configuration menu.See 9.4.14.

Step 9 Return to the display modeThe BA377NE is now configured asrequired for this example. Pressing the )

button will save the configuration and returnthe BA377NE to the display mode with allthe digits flashing indicating that the set timehas to be entered.

Step 10Enter the set timeFinally the current time to be displayed bythe Clock should be entered. Re-enter theconfiguration menu by pressing the ( and) buttons simultaneously which will resultin code being displayed. Pressing ( willallow the access code 1209 to be enteredusing the & or * button to adjust theflashing digit and the ( button to transfercontrol to the next digit. When all four digitshave been adjusted press ( to enter theconfiguration menu and using the & or *

button select 5Et and press ) to reveal00 : 00 : 00 with the hours flashing. Using the& or * button adjust the flashing hoursdigit and press ( to transfer control to theminutes and then to the seconds. When allhave been set as required, press ) to startthe clock from the entered time and returnto the display mode.

43

11. MAINTENANCE when configured as a Clock

11.1 Fault finding during commissioningIf a BA377NE fails to function as a Clock duringcommissioning the following procedure should befollowed:


No display No power supply, orincorrect wiring.

Note: Terminals 2 &RS2 are

interconnectedwithin the

instrument.

That there isbetween 10 and

30V on terminals 1& 2 with terminal 1

positive.

That there are noconnections to

terminals3, 4, 5 & 6.

Configuration menudoes not

correspond with theClock section of this

manual.

BA377NE isconfigured as a

Timer.

That FunCtion inconfiguration menuis set to CLoC not to

ELAP5E.

Clock displayflashes

00 : 00 : 00

Local time has notbeen entered.

Enter the local timein the 5Et functionof the instrument

configuration menu.

Control output(s) donot function.


enabled.


configuration menu.

Clock will not start Reset terminalsRS1 and RS2 are

connected togetherand the clock is

resetting.

If reset annunciatoron display isactivated,

disconnect linkbetween RS1 and

RS2.

Unable to enterconfiguration menu.



being used.


11.2 Fault finding after commissioningEN 60079-17 Electrical installations inspection andmaintenance permits live maintenance in Zone 2 if arisk analysis demonstrates that this does notintroduce an unacceptable risk. The removal ofcovers [opening of Ex n enclosure] is permitted ifthis can be done without contaminating the interiorof the instrument with dust or moisture. Some end-users may prefer not to permit live maintenance tominimise risk.


Live maintenance within the hazardous areashould only be performed when it ispermitted by risk analysis, or when there isno risk of a flammable atmosphere beingpresent.

If a BA377NE fails after it has been functioningcorrectly as a Clock, the following table may help toidentify the cause of the failure.


No display No power supply That there isbetween 10 and

30V on terminals 1& 2 with terminal 1

positive.

Clock displayflashes 00 : 00 : 00

Instrument powersupply has been

interrupted and localtime has been lost.

Enter the local timein the 5Et functionof the instrument

configuration menu.

Control output(s) donot function.


enabled.


configuration menu.

Clock will not start Reset terminalsRS1 and RS2 are

connected togetherand the clock is

resetting.

If reset annunciatoron display isactivated, disconnect

connection betweenRS1 and RS2.

Unable to enterconfiguration menu.



being used.


If this procedure does not reveal the cause of thefault, it is recommended that the instrument isreplaced.

44

11.3 ServicingWe recommend that faulty BA377NE Clocks arereturned to BEKA associates or to our local agent forrepair.

11.4 Routine maintenanceThe mechanical and electrical condition of theinstrument should be regularly checked. Inspectionfrequency should be chosen to suit theenvironmental conditions.

11.5 GuaranteeInstruments which fail within the guarantee periodshould be returned to BEKA associates or our localagent. It is helpful if a brief description of the faultsymptoms is provided.

11.6 Customer commentsBEKA is always pleased to receive comments fromcustomers about our products and services. Allcommunications are acknowledged and wheneverpossible, suggestions are implemented.

45

Appendix 1 Dust certification

A1.0 ATEX dust certificationIn addition to ATEX Ex nA certification permittinginstallation in explosive gas atmospheres which isdescribed in the main section of this instructionmanual, all BA377NE Timer or Clocks have ATEXdust ignition protection by enclosure certificationEx tc permitting installation in combustible dustatmospheres. The front panel push button switchesare non incendive and have been certifiedintrinsically safe Ex ic without the need for Zenerbarriers or galvanic isolators.

This appendix describes ATEX installations inexplosive dust atmospheres conforming withEN 60079-14 Electrical installations design,selection and erection. When designing systems forinstallation outside the UK the local Code of Practiceshould be consulted.

The Timer or Clock’s Ex tc dust input and outputsafety parameters are identical to the Ex nA gasparameters, therefore all the electrical circuitsshown in the main section of this manual may alsobe used for dust applications.

A1.1 Zones, and Maximum SurfaceTemperature

The BA377NE has been ATEX dust certified

Group II, Category 3D Ex ic tc IIIC T80ºC Dc -40 ≤ Ta ≤ 60°C

When connected to a suitable system the Timer orClock may be installed in:

Zone 22 explosive atmosphere in the form of acloud of combustible dust in air is notlikely to occur in normal operation, butif it does occur, will only persist for ashort period.

Be used with dust in subdivisions:

IIIA combustible flyings

IIIB non-conductive dust

IIIC conductive dust

Having a Minimum Ignition Temperature of:

Dust cloud 120°C

Dust layer on indicator 155°Cup to 5mm thick

Dust layer on indicator Refer toover 5mm thick. EN 60079-14

At an ambient temperature between -40 and +60°C

A1.2 Special conditions for safe use in dust atmospheres.

The BA377NE ATEX Type Examination Certificatehas an 'X' suffix to show that special conditions forsafe use are specified by the BA377NE Ex ic tccertificate. These state that the BA377NE Timer orClock should be:

a. Mounted such that the instrument terminalsare protected by at least an IP54 enclosurecertified to IEC 60079-15 or IEC 60079-0 asappropriate. Note: An Ex t, Ex n, Ex e or Ex p certifiedenclosure satisfies this requirement.

b. Instrument terminals must be supplied fromlimited energy circuits. Note: This means that the BA377NE shouldonly be connected to circuits with outputparameters in normal operation equal to, orless than the instruments input parameterswhich are the same as the Ex nA inputparameters specified in section 3 of thismanual.

A1.3 MaintenanceThe IEC guidance on maintenance proceduresEN 60079-17 permits live maintenance in Zone 22 ifa risk analysis demonstrates that this does notintroduce an unacceptable risk. The removal ofcovers [opening of Ex tc enclosure] is permitted ifthis can be done without contaminating the interiorof the enclosure and instrument with dust ormoisture. Some end-users may prefer not to permitlive maintenance to minimise risk.


Live maintenance within the hazardousarea should only be performed when it ispermitted by risk analysis or when there isno risk of a flammable atmosphere beingpresent.

Before closing the Ex tc enclosure ensurethat the sealing gaskets are undamagedand free from dirt and foreign bodies.

Inspection of the Timer or Clocks mechanicalcondition and removal of accumulated dust from thefront of the instrument and the outside of theenclosure should be regularly performed. Theinterval between inspections depends uponenvironmental conditions. Removal of flammabledust should be performed with care to avoid creatinga dust cloud.

46

Appendix 2 IECEx certification

A2.0 The IECEx Certification SchemeIECEx is a global certification scheme for explosionprotected products which aims to harmoniseinternational certification standards. For additionalinformation about the IECEx certification schemeand to view the BEKA associate certificates, pleasevisit www.iecex.com

A2.1 IECEx Certificate of ConformityThe BA377NE Timer or Clock has been issued withan IECEx Certificate of Conformity numberIECEx ITS 16.0005X which specifies the followingcertification code:

Ex nA ic IIC T5 Gc Ex ic tc IIIC T80ºC Dc IP66 -40ºC ≤ Ta ≤ +60ºC

The IECEx certificate may be downloaded fromwww.beka.co.uk, www.iecex.com or requested fromthe BEKA sales office.

A2.2 InstallationThe IECEx safety parameters are identical to theATEX safety parameters described in the mainsection of this manual and both refer to equivalentstandards. Therefore the ATEX installationrequirements specified in the main sections and inAppendix 1 of this manual, also apply for IECExinstallations, but the local code of practice shouldalso be consulted.

The Timer or Clock's front panel push buttoncontacts are non incendive and have been certifiedintrinsically safe Ex ic, without the need for anexternal Zener barrier or galvanic isolator, as shownon the IECEx certificate. This allows the Timer orClock to be adjusted and configured live wheninstalled in a Ex n panel enclosure located inZone 2.

For ATEX installations self certified Category 3GDequipment, such as enclosures, may be installed inZone 2 or 22, but self certified equipment is notpermitted for IECEx installations.

A2.3 Special conditions for safe useThe IECEx certificate number has an ‘X’ suffixindicating that special conditions apply for safe use.These conditions are identical to the ATEX specialconditions for safe use specified in the mainsections and in Appendix 1 of this manual.

47

Appendix 3 ETL & cETL certification forinstallations in USA and Canada

A3.0 cETL MarkFor installations in the USA and Canada, theBA377NE Timer or Clock has ETL and cETL Ex nAand Ex tc approval, Control Number 4008610.Copies of the Authorisation to Mark are availablefrom the BEKA associates sales office andwww.beka.co.uk

A3.1 ETL and cETL certificationThe US and Canadian standards used forassessment and certification of the BA377NE arelisted on the cETL Authorisation to Mark.

Installations must comply with BEKA associatesControl Drawing CI330-53, which is attached to thisappendix.

The ETL safety parameters are the same as theATEX and IECEx parameters, the systems shown insections 2, 3 & 4 of this manual may therefore alsobe used for US and Canadian installations subject tocompliance with the local codes of practice.

ETL and cETL codes

CL I Zone 2 AEx nA ic IIC T5 Gc (US gas, Zone cert)

Zone 22 AEx ic tc IIIC T80ºC Dc (US dust, Zone cert)

Ex nA ic IIC T5 Gc (Canadian gas, Zone cert)

Ex ic tc IIIC T80ºC Dc (Canadian dust, Zone cert)

-40ºC Ta 60ºC

The Timer or Clock's front panel push buttoncontacts are non incendive and have been certifiedintrinsically safe Ex ic, without the need for anexternal Zener barrier or galvanic isolator, as shownon the ETL Authorisation to Mark. This allows theTimer or Clock to be adjusted and configured livewhen installed in a Ex n panel enclosure located inZone 2.

Documents

BA377NE Rugged one input Ex nA and Ex tc Timer or Clock · external events, or control external events via two ... whether it is configured as a Timer or as a Clock. 2.1 ATEX Ex nA