FL3100_FL3101_MAN

Models FL3100/FL3101UV/IR and UV onlyFlame Detectors

The information and technical data disclosedin this document may be used anddisseminated only for the purposes and to theextent specifically authorized in writing byGeneral Monitors.

Instruction Manual 11/01

General Monitors reserves the right to changepublished specifications and designs withoutprior notice.

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Part No. MANFL3100/3101Revision G/11-01

Models FL3100/3101

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WarrantyGeneral Monitors warrants the Models FL3100 and FL3101 to be free fromdefects in workmanship or material under normal use and service within twoyears from the date of shipment.

General Monitors will repair or replace without charge any such equipment foundto be defective during the warranty period. Full determination of the nature of,and responsibility for, defective or damaged equipment will be made by GeneralMonitors personnel.

Defective or damaged equipment must be shipped to General Monitors plant orrepresentative from which the original shipment was made. In all cases thiswarranty is limited to the cost of the equipment supplied by General Monitors.The customer will assume all liability for the misuse of this equipment by itsemployees or other personnel.

All warranties are contingent upon proper use in the application for which theproduct was intended and does not cover products which have been modified orrepaired without General Monitors approval, or which have been subjected toneglect, accident, improper installation or application, or on which the originalidentification marks have been removed or altered.

Except for the express warranty stated above, General Monitors disclaims allwarranties with regard to the products sold, including all implied warranties ofmerchantability and fitness and the express warranties stated herein are in lieu ofall obligations or liabilities on the part of General Monitors for damages including,but not limited to, consequential damages arising out of, or in connection with,the performance of the product.

WarningInstallation and Maintenance must be carried out by suitably skilled andcompetent personnel only.

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System Integrity VerificationGeneral Monitors mission is to benefit society by providing solutions throughindustry leading safety products, services and systems that save lives andprotect capital resources from the dangers of hazardous flames, gases andvapors.

The safety products you have purchased should be handled carefully andinstalled, calibrated and maintained in accordance with the respective productinstruction manual. Remember these products are for your safety.

To ensure operation at optimum performance, General Monitors recommendsthat certain maintenance items be performed.

Commissioning Safety SystemsBefore power up, verify wiring, terminal connections and stability of mounting forall integral safety equipment including, but not limited to:

Power supplies Control modules Field detection devices Signaling / output devices Accessories connected to field and signaling devices

After the initial application of power (and any factory specified warm-up period) tothe safety system, verify that all signal outputs, to and from devices and modules,are within the manufacturers specifications. Initial testing should be performedper the manufacturers recommendations and instructions.

Proper system operation should be verified by performing a full, functional test ofall component devices of the safety system, ensuring that the proper levels ofalarming occur.

Fault/Malfunction circuit operation should be verified.

Periodic Testing of Field DevicesPeriodic testing/calibrating should be performed per the manufacturersrecommendations and instructions. Testing/Calibrating procedures shouldinclude, but not be limited to:

Verify integrity of all optical surfaces and devices For flame detectors, use the appropriate test lamp

When testing produces results outside of the manufacturers specifications,replacement of the suspect device(s) should be performed as necessary.Maintenance intervals should be independently established through adocumented procedure, including a Maintenance log maintained by plantpersonnel or third party testing services.

Models FL3100/3101

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Periodic System VerificationThe following system verifications should be performed at least annually:

Verify wiring, terminal connections and stability of mounting for all integral safetyequipment including, but not limited to:

Power supplies Control modules Field detection devices Signaling / output devices Accessories connected to field and signaling devices

Proper system operation should be verified by performing a full, functional test ofall component devices of the detection system, ensuring that the proper levels ofalarming occur.

Fault/Malfunction circuit operation should be verified.

Maintenance intervals should be independently established through adocumented procedure, including a maintenance log maintained by plantpersonnel or third party testing services.

Models FL3100/3101Quick Start Guide

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1.0 Quick Start Guide1.1 Mount and wire the detector (see pages 2 through 17).

Pay special attention to the conduit seal entry (Canadian Electrical Code Handbook Part1, Section 18-154). Also, lithium based grease is applied to the O-ring seal between theback-plate and housing, as additional protection to avoid water ingression into thehousing. Mount detector using swivel mount or mounting bracket hardware.

Figure Q-A 961-004 Union Swivel Mounting Hardware

Figure Q-B 71172 Rear View Wall Mounting Assembly

EP SWIVEL MOUNTING HARDWARE

P/N 961-003

3/4-14 NPT

360 SWIVEL ELBOW

DF/IR UNIT SHOWN(FL3102)

3/4 CONDUIT

12.5[317.5]

CONDUIT SEAL MUST BE WITHIN 18'' OF UNIT

WALL MOUNTINGREAR VIEW

2.80[71.12]

2.80[71.12]4.66[118.4]

4X .26[6.6]REF HOLE :


v

Figure Q-C 71172 Rear View Bracket Assembly

Figure Q-D Field Terminations

Terminal Block 2 Terminal Block 1

10987654321

Term #

12345678910

Term #

4X M6 X 14

BRACKET ASSEMBLY

4X M6 WASHER

5.00[127.0]3.75[95.3]

3060

30


vi

1.2 Apply power to the detector.Two light emitting diodes (LEDs) are visible through the UV window (the larger window onUV/IR units). Immediately upon powering up the detector, both LEDs will start blinkingalternately for 10 seconds. The unit will then enter the Ready mode. During the Ready"mode, the green LED will flash off 1 second, every 10 seconds.

1.3 Test the detector using the TL100 (UV only) orTL103 (UV/IR)Test the integrity of your system by using either the TL100 UV test lamp (part# TL100-000-000-020) or the TL103 UV/IR test lamp (part# TL103-000-000-130). The originalconfiguration (i.e. sensitivity and relay options) can be changed by using the SwitchSelectable Options (Figure 3-A), then changing the dip-switch settings located on thebottom of the power board (SW1).

NOTE - The instrument is now ready to operate! Please consult the manual formore information on the instruments many features.

NOTE - If you have any problems in the set-up or testing of the detector, pleaserefer to the Trouble Shooting Section, or call the factory direct.

Worldwide Service is available by calling:

Lake Forest, California Phone: +1-949-581-4464(24 hr. service) Fax: +1-949-581-1151

Houston, Texas Phone: +1-281-855-6000Fax: +1-281-855-3290

Ireland Phone: +353-91-751175Fax: +353-91-751317

Singapore Phone: +65-748-3488Fax: +65-748-1911

United Arab Emirates Phone: +971-4-8815751Fax: +971-4-8817927

United Kingdom Phone: +44-1625-619583Fax: +44-1625-619098

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Table of Contents Warning ..........................................................................................iSystem Integrity Verification...............................................................................ii1.0 Quick Start Guide ...................................................................................iv 1.1 Mount and wire the detector (see pages 2 through 17). ............. iv

1.2 Apply power to the detector. ....................................................... vi1.3 Test the detector using the TL100 (UV only) or .............................

TL103 (UV/IR) ................................................................ viTable of Contents .......................................................................................viiTable of Figures ........................................................................................ix

2.0 Product Description ................................................................................12.1 General Description......................................................................1

3.0 Installation .........................................................................................23.1 Tools Required .............................................................................23.2 Choosing Product Locations ........................................................23.3 Mounting and Wiring ....................................................................5

4.0 Operation .......................................................................................164.1 Checklist .....................................................................................164.2 Start Up ......................................................................................164.3 System Test ...............................................................................164.4 User Selectable Options/Factory Defaults .................................17

5.0 Maintenance .......................................................................................195.1 General Maintenance.................................................................195.2 Cleaning the Lenses/Light Rods ................................................195.3 Sensitivity Check ........................................................................205.4 Storage.......................................................................................22

6.0 Trouble Shooting...................................................................................236.1 Trouble Shooting ........................................................................236.2 Final Assembly ...........................................................................25

7.0 Customer Support.................................................................................27

8.0 MODBUS Interface ................................................................................288.1 Baud Rate ..................................................................................288.2 Data Format ...............................................................................288.3 MODBUS Read Status Protocol (Query/Response)..................28

8.3.1 MODBUS Read Query Message ..................................288.3.2 MODBUS Read Response Message............................29

8.4 MODBUS Write Command Protocol (Query/Response)............298.4.1 MODBUS Write Query Message...................................298.4.2 MODBUS Write Response Message ............................308.4.3 Function Codes Supported ...........................................30

8.5 Exception Responses and Exception Codes .............................308.5.1 Exception Responses....................................................31

8.6 Command Register Locations....................................................328.6.1 Operational Mode Commands ......................................32

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8.7 FL3100, FL3101 Operational Mode Command Register Details.368.7.1 Analog ...........................................................................368.7.2 Mode..............................................................................368.7.3 Status/Error ...................................................................368.7.4 UV/IR Only ....................................................................368.7.5 Model Type....................................................................378.7.6 Software Revision .........................................................378.7.7 COPM Fault...................................................................378.7.8 EEPROM Override ........................................................378.7.9 Options ..........................................................................388.7.10 Comm 1 Address...........................................................388.7.11 Comm 1 Baud Rate.......................................................398.7.12 Comm 1 Data Format....................................................398.7.13 UV Signal Count............................................................398.7.14 IR Signal Count .............................................................408.7.15 UV Fault Total ...............................................................408.7.16 IR Fault Total.................................................................408.7.17 Remote Reset ...............................................................408.7.18 Remote Alarm Test .......................................................408.7.19 Clear COPM Faults .......................................................408.7.20 Comm 1 & 2 Total Receive Errors ................................408.7.21 Comm 1 or 2 Bus Activity Rate %.................................418.7.22 Comm 1 & 2 Function Code Errors ...............................418.7.23 Comm 1 & 2 Starting Address Errors............................418.7.24 Comm 1 Only Total Receive Errors ..............................418.7.25 Comm 1 & 2 RXD CRC Lo Errors .................................418.7.26 Comm 1 & 2 RXD CRC Hi Errors..................................418.7.27 Comm 1 Only Overrun Errors .......................................418.7.28 Comm 1 Only Noise Flag Errors ...................................418.7.29 Comm 1 & 2 Framing Errors .........................................418.7.30 Comm 1 or 2 Message Interval .....................................428.7.31 Comm 2 Only Total Receive Errors ..............................428.7.32 Comm 1 Only SCI Errors ..............................................428.7.33 Clear Comm 1 & 2 Errors..............................................428.7.34 Comm 2 Address...........................................................428.7.35 Comm 2 Baud Rate.......................................................428.7.36 Comm 2 Data Format....................................................43

9.0 Appendix .......................................................................................449.1 Principle of Operation.................................................................44

9.1.1 UV Detector - FL3100 & FL3101.................................449.1.2 UV/IR Flame Detector - FL3100..................................45

9.2 Specifications .............................................................................469.2.1 System Specifications ...................................................469.2.2 Mechanical Specifications.............................................479.2.3 Electrical Specifications ................................................489.2.4 Environmental Specifications ........................................49

9.3 Approvals ...................................................................................499.4 Accessories ................................................................................49

9.4.1 Mounting Swivel/Union..................................................499.4.2 Mounting Bracket ..........................................................499.4.3 Optical Air Guard...........................................................49

9.5 Storage.......................................................................................49

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Table of FiguresFigure Q-A 961-004 Union Swivel Mounting Hardware................................. ivFigure Q-B 71172 Rear View Wall Mounting Assembly ................................ ivFigure Q-C 71172 Rear View Bracket Assembly............................................vFigure Q-D Field Terminations........................................................................vFigure 2-A Model FL3100 .............................................................................1Figure 2-B Model FL3101 ..............................................................................1Figure 3A-1 FL3100 (UV/IR) Field of View.......................................................3Figure 3A-2 FL3101 (UV) Field of View ...........................................................4Figure 3A-3 FL3101 (UV) Field of View ...........................................................5Figure 3-B 961-004 Swivel Elbow Drawing

(Class I, Div 1 & 2, Groups C & D)............................................6Figure 3-C 71072 Mounting Bracket Drawing

(Class I, Div 1 & 2, Groups B, C & D or Zone 1 and 2).............6Figure 3-D 71072 Mounting Bracket Drawing

(Class I, Div 1 & 2, Groups B, C & D or Zone 1 and 2).............7Figure 3-E FL3100 & FL3101 Outline Drawing..............................................7Figure 3-F FL3100 & FL3101 Outline Drawing..............................................8Figure 3-G FL3100 & Fl3101 Field Terminations ...........................................8Figure 3-H Terminal Designations..................................................................9Figure 3-I Detector Housing and Base .........................................................9Figure 3-J Terminal Block Operation...........................................................10Figure 3-K Protection Circuits for Relay Contacts .......................................10Figure 4-A Dip Switch Options .....................................................................17Figure 4-B1 Dip Switch Location....................................................................18Figure 4-B2 Dip Switch Location....................................................................18Figure 5-A UV and IR Windows ...................................................................20Figure 6-A 71100 FL3100 (UV/IR), Final Assembly.....................................25Figure 6-B 71125 FL3101 (UV), Final Assembly .........................................26Figure 9-A Spectral Response of UV and IR Detectors...............................44

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2.0 Product Description2.1 General Description

Fire is a phenomenon of combustion. Combustion is the continuous chemicalreaction of a reducing agent (fuel) and an oxidizing agent (oxygen, etc.) with theevolution of thermal energy (heat). Fire is usually manifested in heat (IR),smoke, light (visible), and flame (UV). Flame is the gaseous region of a firewhere vigorous combustion chain reactions take place. These reactions emitradiation covering the Infrared, Ultraviolet and the Visible Spectral Regions.

The General Monitors Model FL3100 is an Ultraviolet/Infrared (UV/IR) FlameDetector (Figure 2-A). It detects the Ultraviolet and Infrared spectral regions offlame to produce a system which is highly immune to false alarms caused bylightning, arc-welding, hot objects, and other sources of radiation.The Model FL3101, is an Ultraviolet (UV) flame detector (Figure 2-B). It onlyresponds to UV and has been optimized for speed of response.

Both units may be used with the General Monitors TA40X Modules, FL802controller, or with other equipment which accepts the 4 to 20mA output. Theymay also be interfaced directly with alarm/suppression devices or with switchedinput modules using integral relays.

NOTE - Model FL802 is not CE Marked and, therefore, cannot be supplied to theEU.

The Models FL3100 and FL3101 features include:

! Compact unitized design! Continuous optical path monitoring (COPM)! 4-20mA, alarm relays and MODBUS RTU RS-485 standard (Dual

MODBUS optional)! Wide field of view! High false alarm immunity! Visual indicators

Figure 2-A Model FL3100 Figure 2-B Model FL3101

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3.0 InstallationWARNING - Installation and Maintenance must be carried out by suitably skilledand competent personnel only.

3.1 Tools Required1. T allen head wrench to remove detector head from detector base (included

with flame detector).2. Flat head screwdriver maximum 3/16 (5 mm) width for terminal block

connections.3. Adjustable wrench for conduit, or cable gland connections.

3.2 Choosing Product LocationsSeveral variables are involved in selecting the locations to install detectors toensure proper flame detection. There are no hard and fast rules defining theoptimum location. Following are some general suggestions that should beconsidered in regard to particular conditions at the site where the unit(s) arebeing installed:

Detector Field of ViewThe Models FL3100 and FL3101 Flame Detectors have a maximum cone ofvision of 120 and 140 maximum respectively. This cone has its vertex at thecenter of the detector (see Figures 2A-1, 2A-2, and 2A-3).Optical Sensitivity RangeThe distance at which the detector will respond to a flame is a function of theintensity of that flame. The maximum distance is 50 feet (15.2m) for a gasolinefire with a surface area of 1 square foot (0.093m2).

Environmental Factors1. Mounting should be as free from shock and vibration as possible and

convenient for visual inspection and cleaning.2. Detectors mounted in dirty atmospheric conditions will require frequent

inspection, cleaning, and sensitivity checking.3. Observe the ambient temperature range for the specific model (see Section

9-2 Environmental Specifications). For outdoor installations or other areasexposed to intense, direct solar radiation, the detector may reachtemperatures well above specifications. For these installations, a shade orcover may be required to keep the detector temperature within specifications.

4. Make sure the field-of-view of the detector is not obstructed by the cover ornearby objects.

5. Avoid conditions which would allow ice build-up on the optical detectorwindows. Complete icing over of the detector window(s) can result in faultconditions.

6. Mount away from sources of electrical noise where possible.7. A constant UV source detected by the unit will cause the detector to go into

FAULT after 9 10 minutes of exposure. Source must be removed ordetector reposi-tioned. (UV detectors can pick-up arc welding up to 23miles away).

Models FL3100/3101

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15

HORIZONTAL

SENSITIVITY

HORIZONTAL(5)

0

50%75%100%

60

30

45

15

60

45

10'

15'

40'

35'

30'25'

20'

3015 50'

45'

0

25'50'50'

50'

50'

30'

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Figure 3A-2 FL3101 (UV) Field of View

10'

15'

20'

30'

35'

40'

45'

50'

60

45

150

15

30

75

70

75

70

60

45

30

25'

SENSITIVITY

(5)

30

60

70

45

HORIZONTAL

15

75%

50%

100%

50'

TABLE CHART

50'

25'

50'

50'

20'

50'

75

100%

0

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Figure 3A-3 FL3101 (UV) Field of View

3.3 Mounting and WiringWARNING - The conduit entries should be sealed per the Canadian ElectricalCode Handbook (Part 1, Section 18-154) or NEC 500-3d. Additional benefit ofconduit seals is the prevention of water entering the housing through the conduitentry.

WARNING - Unused cable entry holes must be sealed with an approvedstopping plug. Red caps supplied by GM are for dust protection only and mustnot be left on unit when installed.

The Model FL3100/FL3101 Flame Detector should be mounted pointingdownward so that dust/moisture will not accumulate on the optical window(s).The detector(s) should be mounted in locations, which will inhibit people orobjects from obscuring the detectors cone of vision.

Detectors should be mounted such that the conduit or cable gland entries arepointed downward. See above warning for conduit entries. For cable glands andstopping plugs, the threads should be sealed with Castrol EP and boots fittedover the cable gland to prevent water ingress at the cable-to-gland junction.

Mounting hardware should be used as shown in Figures 3-B, 3-C and 3-D. Theoverall dimensions of the detector and mounting hardware are shown in Figures3-E and 3-F.

0

VERTICAL

50'

75%

50'

50'

50'

50'

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NOTE - General Monitors does not recommend the use of cable shoes or crimpson any junction box or housing wiring terminals. Poor crimping can cause a badconnection when the unit experiences temperature variations. Good practice isto just terminate unused cable wires following insulation removal.

Figure 3-B 961-004 Swivel Elbow Drawing (Class I, Div 1 & 2, Groups C & D)

Figure 3-C 71072 Mounting Bracket Drawing (Class I, Div 1 & 2, Groups B, C & D or Zone 1and 2)

EP SWIVEL MOUNTING HARDWARE

P/N 961-003

3/4-14 NPT

360 SWIVEL ELBOW

DF/IR UNIT SHOWN(FL3102)

3/4 CONDUIT

12.5[317.5]

CONDUIT SEAL MUST BE WITHIN 18'' OF UNIT

WALL MOUNTINGREAR VIEW

2.80[71.12]

2.80[71.12]4.66[118.4]

4X .26[6.6]REF HOLE :

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4X M6 X 14

BRACKET ASSEMBLY

4X M6 WASHER

5.00[127.0]3.75[95.3]

3060

30

Figure 3-D 71072 Mounting Bracket Drawing (Class I, Div 1 & 2, Groups B, C & D or Zone 1and 2)

Figure 3-E FL3100 & FL3101 Outline Drawing

6.2[157.5]

2X 3/4 NPT ENTRY

1.50[38.1].75[19.1]

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5.5 [139.7]5.0[127.0]

6.2[157.5]2.94[74.7]

4X M6 X 1

1.67[42.4].75[19.1]

1.63[41.4]

Figure 3-F FL3100 & FL3101 Outline Drawing

Figure 3-G FL3100 & Fl3101 Field Terminations

TB110

9

8

7

6

5

4

3

2

1

COM

+24VDC

COM

+24VDCDATA2-

0-20mADATA2+ALMTEST

RESET

DATA-

DATA+

9

10

8

6

7

5

4

2

3

1

TB2

FLT 2

FLT 1

FLT C

WARN C

WARN 1

WARN 2

ALM 1

ALM 2

ALM C

CHAS GND

FIELD TERMINATIONS

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Figure 3-H Terminal Designations

Figure 3-I Detector Housing and Base

Power Supply

12345678910

2

6

8910

7

45

3

1

- +

CONTROLDEVICEPLC, DCS, ETC

RS232COM.

COM.

NORMALLY OPEN SWITCH

NORMALLY OPEN SWITCH

CHASSIS GROUND(ONLY IF REQUIRED)

*ALARM RELAY

*WARN RELAY

*FAULT RELAY

* PLEASE SEE FIGURE 2-JFOR RELAY PROTECTION

CIRCUITS

UNIT #2(IF POWERED IN SERRIES)

COM.COM.+24V DC+24V DC

0-20 mAALARM TESTRESETDATA -DATA +

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Figure 3-J Terminal Block Operation

Terminal ConnectionsAll wire connections are made through the base entries to the terminal block (seeFigure 3-J). The terminal block accepts 14 AWG to 22 AWG (2.1 to 0.3mm2)stranded or solid core wire. Each wire should be stripped to .25 (.64cm). Toconnect the wire to the terminal block, insert the conductor into the connectionspace as shown in Figure 3-J and tighten the corresponding screw terminal.There are twenty terminal connections. The following pages contain descriptionsand specifications for each connection.

WARNING - Relay contacts must be protected against transient and over-voltageconditions (see Figure 3-K below).

Figure 3-K Protection Circuits for Relay Contacts

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Alarm RelayTB2, Term 2 = ALARM CTB2, Term 3 = ALARM 1TB2, Term 4 = ALARM 2

These connections are for the SPDT ALARM relay. The ALARM output is timedelayed for 1, 2, 4, or 8 seconds. This time delay can be set by RS-485 or byDIP switch.

The ALARM output can be normally energized or normally de-energized, latchingor non-latching, and these options are also set via RS-485 or by DIP switch.

(See Section 4.4 User Selectable Options/Factory Defaults)Alarm RelayTB2, Term 2 = ALM C = Alarm Common

Normally de-energizedTB2, Term 3 = ALM 1 = Normally ClosedTB2, Term 4 = ALM 2 = Normally Open

Normally energizedTB2, Term 3 = ALM 1 = Normally OpenTB2, Term 4 = ALM 2 = Normally Closed

CAUTION - For all relay connections see Figure 3-K.

North American Approved Applications: The ALARM relay contact ratings are 8A@ 250 VAC and 8A @ 30 VDC resistive max.

European Union (EU) Approved Applications: The ALARM relay contact ratingsare 8A, 30 V RMS/42.4 V peak or 8A @ 30 VDC resistive max.

Warning RelayTB2, Term 5 = WARN CTB2, Term 6 = WARN 1TB2, Term 7 = WARN 2

These connections are for the SPDT WARN relay. The WARN output isimmediate on the Models FL3100/FL3101. The WARN output can be normallyenergized or normally de-energized, latching or non-latching, and these optionsare also set via RS-485 or by a DIP switch. (See Section 4.4 User SelectableOptions/Factory Defaults).Warning RelayTB2, Term 5 = WARN C = Warning Common

Normally de-energizedTB2, Term 6 = WARN 1 = Normally ClosedTB2, Term 7 = WARN 2 = Normally Open

Normally energizedTB2, Term 6 = WARN 1 = Normally OpenTB2, Term 7 = WARN 2 = Normally Closed

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The WARN relay contact ratings are 8A @ 250VAC and 8A @ 24VDC.

CAUTION - Inductive loads (bells, buzzers, relays, etc.) on dry relay contactsmust be clamped down as shown in Figure 2-J. Unclamped inductive loads cangenerate voltage spikes in excess of 1000 Volts. Spikes of this magnitude maycause false alarms and contact damage.

North American Approved Applications: The ALARM relay contact ratings are 8A@ 250 VAC and 8A @ 30 VDC resistive max.


Fault RelayTB2, Term 8 = FLT CTB2, Term 9 = FLT 1TB2, Term 10 = FLT 2

These connections are for the SPDT FAULT relay. The FAULT outputconfiguration is normally energized and non-latching. This is the standardconfiguration and it cannot be changed. The FAULT circuit will be activatedduring the time-out function, a low power or loss of power condition, and during afailed COPM check. During these conditions the FAULT relays will de-energizeand the analog output signal will drop to 0mA (2mA for COPM Faults) for theduration of the FAULT.

Fault RelayTB2, Term 8 = FLT C = Fault Common

Normally energizedTB2, Term 9 = FLT 1 = Normally OpenTB2, Term 10 = FLT 2 = Normally Closed

North American Approved Applications: The ALARM relay contact ratings are 8A@ 250 VAC and 8A @ 30 VDC.


CAUTION - For all relay connections see Figure 3-K.

Alarm Reset TerminalTB1, Term 3 = RESET

The RESET, when activated, returns a latched ALARM and/or WARN output,that is no longer valid, to its original state. For this RESET function, place onecontact of a normally open momentary switch to TB1 Terminal 3 and the othercontact to DC COM (the detectors common). To activate, just press and releasethe switch.

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Alarm Test TerminalTB1, Term 4 = TEST

By connecting one contact of a normally open, momentary switch, to TB1Terminal 4 and the other contact to TB1 Terminals 9 and 10 (DC COM), the usercan test the alarm outputs of the Flame Detector by activating this switch for oneto eight seconds depending on the alarm time delay setting. The Alarm Test willactivate the WARN and ALARM relay outputs as well as the appropriate analogoutput. The Flame Detector will remain in this state until the switch is released.

NOTE - The latching WARN and/or ALARM will have to be RESET manually.The Alarm Test feature cannot be daisy chained between two or moreFL3100/FL3101 Flame Detectors.

Analog OutputTB1, Term 5 = 0 - 20mA (Analog Output)

The 0 to 20mA output is a current signal that corresponds to the followingsignals:

FAULT 0 to 0.2mACOPM Fault 2.0 0.2mAReady 4.0 0.2mAIR (FL3100 only): 8.0 0.2mAUV (FL3100 only): 12.0 0.2mAWARN 16.0 0.2mAALARM 20.0 0.2mA

The maximum analog output load is 600 ohms, including wiring.

Cable RequirementsFor interfacing with 250 ohm input impedance devices, the following maximumcable lengths apply (maximum 50 ohm loop):

CableAWG

RunFeet

Cablemm2

RunMeters

14 9000 2.50 275016 5800 1.50 177018 3800 1.00 116020 2400 0.75 73022 1700 0.50 520

PowerTB1, Term 7, 8 = +24VDCTB1, Term 9, 10 = COM

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These are the power connections. The supply voltage range is 20 to 36VDC atthe detector (low voltage is detected at approximately 18.5 VDC). The followingmaximum cable lengths apply for a +24VDC supply (maximum 20-ohm loop):CableAWG

RunFeet

Cablemm2

RunMeters

14 1370 2.5 450016 715 1.5 234018 470 1.00 154020 300 0.75 97022 205 0.50 670

MODBUS InterfaceTB1, Term 1 = DATA+TB1, Term 2 = DATA-

These are the connections for the MODBUS interface. It is used to either querythe units status or to configure the unit. See Section 8, for detailed informationon MODBUS RTU Protocol.

NOTE - If Dual MODBUS output is ordered, then the 0-20mA output is notavailable and the wiring terminals for the second MODBUS channels are:

TB1, Term 5 = DATA2+TB1, Term 6 = DATA2-

Chassis GroundTB2, Term 1 = CHAS GND

This connection is available for use in wiring that requires a connection tochassis ground.

Connection to Fire Cards/PanelsFor special applications where the detectors are to be wired together formonitoring via standard fire cards, GM will factory-fit EOL and alarm resistors. Ifthis special option is required, please specify at time of order and provide thefollowing information:

Specify one or two resistors (i.e. Alarm only, or alarm resistor and EOL). Specify value of resistors.

Where detectors are used in conjunction with a GM Model IN042 card, valueswould be 470 ohm Alarm resistor and 5.6K EOL. The EOL resistors are onboardthe IN042, selectable by DIP-switches.

Contact General Monitors or an authorized representative for further details.

European Union (EU) Approved Applications: Interconnecting cables must havean overall screen or screen and armor. Cables BS5308 Part 2, Type 2, orequivalent are suitable. Note that the terms screen and shield are equivalentfor the purpose of this manual. The cable armor must be terminated in a suitablecable gland at the detector to ensure a positive electrical connection.

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15

Cable termination in the non-hazardous area! The cable armor must be connected to safety earth in the safe area.! The cable screen (drain wire) must be connected to an instrument earth in

the safe area.! The power supply OV return must be connected to an instrument earth in

the safe area.! The interconnecting cables should be segregated from power and other

noisy cables. Avoid proximity to cables associated with radio transmitters,welders, switch mode power supplies, inverters, battery chargers, ignitionsystems, generators, switch gear, arc lights and other high frequency or highpower switching process equipment. In general, maintain separation of atleast 1m between instrument and other cables. Greater separations arerequired where long parallel cable runs are unavoidable. Avoid runninginstrument cable trenches close to lightning conductor earthing pits.

! Complete all cable insulation testing before connecting the cable at eitherend.

WARNING - Under no circumstances should equipment be connected ordisconnected when under power. This is contrary to hazardous area regulationsand may lead to serious damage to the equipment. Equipment damaged in thismanner is not covered under warranty.

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4.0 Operation4.1 Checklist

Prior to starting the system verify the following:

1. Inhibit any external devices, such as automatic extinguishing fire suppressionsystems or others, which you do not want activated.

2. Verify that the DIP-switch settings are set for the desired configuration.3. Verify that the unit is properly mounted. Ensure the conduit/cable gland

entries are pointed downward.4. Verify the field of view for each detector covers the area intended for flame

detection.5. Verify that the wiring is correct.6. Verify that the power supply is connected properly. The detector is powered

by +24VDC (20 to 36 VDC voltage range). The detector will output a lowvoltage fault at 18.5 VDC or below.

4.2 Start UpTo start up the system, apply power to the flame detectors. Each detector willbegin its self-test start up sequence. For the first 10 seconds, the unit will output0mA, the fault relay stays de-energized, and the green and red LED will flashalternately for 1.0 second, each, or .05 seconds, each.

After this 10 second period, the unit will output 4mA, the fault relay will energize,the red LED will turn off, and the green LED will turn on constant and briefly flashoff every 10 seconds.

4.3 System TestTo test the system, use the General Monitors Test Lamp Model TL103 for theFL3100 Flame Detector or the Model TL100 for the FL3101 Detector. (Refer toSection 5.3).

Models FL3100/3101

17

4.4 User Selectable Options/Factory DefaultsAll settings on the Models FL3100 and FL3101 are done via a DIP switch on thePower/Relay Board or via MODBUS (overrides switch settings). To set theseoptions, remove the detector head from the Base Assembly and locate the DIPswitch (see Figures 4-B1 & 4-B2). On the DIP switch, ON/CLOSED means theswitch is pushed in on the side labeled ON or CLOSED (opposite the OPENside). OFF/OPEN means the switch is pushed in on the side with the numbercorresponding to the switch position or the side labeled OPEN. Refer to the tablein Figure 4-A for the switch assignments. The settings for the WARN andALARM outputs have been covered in Section 3.3. The time delay specifies theamount of time a WARN condition persists before an ALARM condition will occur.

8

7

6

5

43 & 4

3

8

7

6

5

43 & 4

15. WARN normally de-energized14. WARN normally energized13. ALARM normally de-energized12. ALARM normally energized11. WARN latching10. WARN non-latching9. ALARM latching8. ALARM non-latching7. 8 Second ALARM Time Delay6. 4 Second ALARM Time Delay5. 2 Second ALARM Time Delay4. 1 Second ALARM Time Delay

OFFOption

Figure 4-A Dip Switch Options

1. 100% Sens - 1 sqft @ 50 ft2. 75% Sens - 1 sqft @ 35 ft

2 2

3. 50% Sens - 1 sqft @ 25 ft 1

ON1 & 2

1

Models FL3100/3101

18

PIN 1

12

43

57

68

ON

Figure 4-B1 Dip Switch Location

Figure 4-B2 Dip Switch Location

PIN 1

OPE

N

12

34

56

78

Models FL3100/3101

19

5.0 Maintenance

5.1 General Maintenance

Once correctly installed, the unit requires very little maintenance other thanregular sensitivity checks and cleaning of the lenses. General Monitorsrecommends that a schedule be established and followed.

WARNING - Disconnect or inhibit external devices, such as automaticextinguishing or fire suppression systems before performing any maintenance.

NOTE - The removal of particulate matter and any film buildup on the windowsand light rods is necessary to ensure proper sensitivity of the system. It isrecommended that the window and light rods be cleaned at least every 30 daysor more often if the detector is located in a particularly dirty environment.

During routine maintenance of the equipment, if the base plate is removed, theflame path should be replenished with grease compound.

European Union (EU) Approved Applications: The following grease compound isrecommended for use: PBC Plybutylcuprysil, (or equivalent), which hasBASEEFA Health & Safety Executive component approval No. 1051U for use asa jointing compound on flameproof electrical enclosures. This is available fromGeneral Monitors.The neoprene rubber gasket should also be lubricated with Type P80 lubricantavailable from General Monitors (P/N 610-010) should it be found to be dry.

The removal of dust and film build-up on the windows is necessary to ensureproper sensitivity of the system. Windows may be cleaned periodically, to avoida COPM fault being triggered by build-up, dirt or debris.

For use in environments where windows are likely to become blocked regularly,an optical air guard is recommended.

5.2 Cleaning the Lenses/Light Rods

NOTE - DO NOT USE A COMMERCIAL GLASS CLEANER OTHER THAN"INDUSTRIAL STRENGTH WINDEX with Ammonia D. The lenses are notglass. The UV lens material is quartz and the IR lens material is sapphire. Thecleaning solution should be General Monitors P/N 10272-1 ("Industrial StrengthWindex with Ammonia D").

A clean, soft, lint-free cloth, tissue or cotton swab should be used to apply thecleaning solution. Do not touch the lenses or light rods with fingers.

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20

1. Wet the window with the cleaning solution.2. Rub with a dry, unsoiled cloth until the window is clean.3. Let the window dry completely.4. Repeat steps 1, 2 and 3 for the light rods. (See Figure 5-A). Take care only

to clean the uncoated (non - aluminum) areas of the light rods.

NOTE - The removal of particulate matter and any film buildup on the lenses andlight rods is necessary to ensure proper sensitivity of the system. It isrecommended that the window and light rods be cleaned at least every 30 daysor more often if the detector is located in a particularly dirty environment.

Figure 5-A UV and IR Windows

5.3 Sensitivity Check

To verify that each detector is functioning correctly, a General Monitors TestLamp and/or the ALARM TEST function should be used. For the Model FL3100(UV/IR) the General Monitors Model TL103 Test Lamp is recommended. For theModel FL3101 (UV only) the General Monitors Model TL100 Test Lamp isrecommended.

Alarm TestThe Models FL3100 and FL3101 Flame Detectors have a built-in Alarm Testfeature. By connecting one contact of a SPST momentary switch to TB1 position4 and the other contact to DC COM TB1, position 9 and 10 (see Section 3.3Terminal Connections), the user can test the alarm outputs of the Flame Detectorby activating this switch for one to eight seconds depending on the Alarm TimeDelay Setting.

IR SAPPHIRE WINDOW

UV QUARTZ WINDOW

LIGHT RODS

Models FL3100/3101

21

If the Flame Detector detects these sources, it will immediately go into WARNand then into the time delayed ALARM. After one to eight seconds the FlameDetector will reset the non-latching WARN and/or ALARM. A latching WARNand/or ALARM will remain latched until manually reset. If the Flame Detectordoes not respond to the sources, it will output a FAULT condition and will retestevery ten seconds, as in the COPM FAULT case.

TL100 UV Test LampThe General Monitors TL100 Test Lamp is a portable, rechargeable source ofultra-violet radiation, specifically designed for use in testing UV flame detectionsystems. It emits a wide band of radiation and specifically covers the 185 to 260nanometer region which corresponds with the response of most ultraviolet flamedetectors. The Test Lamp is CSA certified intrinsically safe for Class I, Division1, Groups C and D and therefore does not require an explosion-proof housing.

To avoid damaging exposure to ultraviolet radiation, the TL100 provides a PowerOn indicator so that direct viewing is not necessary. Insert the charging plug intothe receptacle. Complete recharging takes a minimum of fourteen hours.

Operating InstructionsThe TL100 has two intensity levels, LO and HI as indicated on the rocker switchlabel. With the switch in the HI position, the Test Lamp is capable of activatingGeneral Monitors UV flame detection systems at distances up to 40 feet (12meters) from the detector. The LO switch will activate the system at distances upto 20 feet (6 meters).To operate the Test Lamp switch, aim it directly at the detector to be tested andactivate the desired intensity level. The ON LED (green) should light, indicatingPower On and the Low Battery LED (red) should remain off, indicating asufficient charge for normal operation. The response of the system will dependon the distance from the detector, as well as the sensitivity and/or time-delaysettings at the control module. If the system is operating normally, it will respondimmediately upon activating the TL100. If the TL100 remains ON for the timeperiod set by the Time Delay adjustment, the flame detector and the controlmodule will go into ALARM.

If the low battery LED (red) is illuminated, the batteries are nearing discharge;however, there is a built-in battery reserve of approximately 15 minutes. It isrecommended that the batteries be recharged as soon as possible after thisperiod. Do not allow the unit to remain in a discharged state.

NOTE - Recharging the TL100 must be done in a non-hazardous area.Recharging the batteries is required whenever the Low Battery LED (red) isilluminated. Plug the charger into a suitable outlet and insert the charging pluginto the charging receptacle located on the back end of the Test Lamp. Fourteento sixteen hours are required for a complete charge. Although overcharging forup to twenty-four hours is tolerable, it will reduce battery life and is notrecommended. If the TL100 is not used for an extended period of time, it isrecommended that it be charged bimonthly to prevent excessive discharge.Batteries may be recharged on an average 500 times.

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22

TL103 UV/IR Test LampThe General Monitors TL103 Test Lamp is a battery operated, rechargeable, testsource specifically designed to test General Monitors UV, UV/IR, and DigitalFrequency IR Flame Detection Systems. It consists of a high-energy broad bandradiation source which emits sufficient energy in both the Ultraviolet and Infraredspectra to activate UV and/or IR detectors. To simulate a fire, the test lampautomatically flashes at one of three DIP switch selectable rates. The ModelTL103, rated explosion-proof, is CSA certified for use in Class I, Division 1,Groups C and D areas. The test lamp operates on internal lead-acid batterieswhich, when fully charged, will operate continuously for 25 to 30 minutes. Aninternal circuit will prevent operation when the batteries are low.

Operating InstructionsIt is always important to start a series of TL103 checks with a fully charged unit.Stand within 15 feet (FL3100) or within 35 feet (FL3101) of the unit to be testedand aim the TL103 squarely into the detector face. If the system is operatingnormally, the detector will go into a WARNING condition after a few flashes of theTest Lamp. If the lamp remains ON for the time-delayed period of the DIP switchsetting, the detector will go into ALARM. To conserve charge, do not operate theTest Lamp longer than is necessary to test each detector. When the battery leveldrops below the level required to maintain the proper intensity of the lamp, aninternal low voltage circuit will shut the lamp off until the batteries have beenrecharged.

Recharging InstructionsInsert the charging plug into the receptacle. Complete recharging takes aminimum of fourteen hours. A schedule should be established and followed.

WARNING: Replace the knurled plug after charging is complete. Charging mustbe carried out in a non-hazardous area. The charging receptacle is located insidethe housing adjacent to the ON button. To gain access, it is necessary tounscrew the gnarled plug from the body of the unit. The plug is secured to theON button by a safety strap to keep it from being lost. It is recommended thatthe TL103 be kept on charge when not in use to prevent excessive batterydischarge. The batteries may be charged an average of 500 times and thebattery pack is replaceable.

5.4 StorageGeneral Monitors Flame Detectors should be stored in a clean, dry area andwithin the temperature and humidity ranges quoted in the Appendix, underEnvironmental Specifications.

When prolonged storage is anticipated, detectors should be sealed together witha dessicant into plastic bags and double wrapped for protection. They should notbe subjected to shock or vibration as this may cause damage. Ideally, thedetectors should remain packed in the molds as shipped by General Monitors.

Insert red dust caps into vacant cable entry holes.

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6.0 Trouble Shooting6.1 Trouble Shooting

CAUTION - Component level repair must be undertaken either by GeneralMonitors personnel or by competent authorized service engineers. SMT PCBrepair shall only be performed at a GM facility.

IntroductionIncluded in this section is a trouble-shooting table. The information included isdesigned to cope with the more common faults, which occur duringcommissioning and operation and which are repairable by a competent operator.

Should the various actions suggested in the table fail to restore normal operation,the unit should be returned to General Monitors for repair. A complete writtendescription of the problem should be included.

Be sure to inhibit or disconnect external alarm wiring before making any checkwhich might send the unit into alarm, if an alarm condition will cause a problem.

NOTE - On no account should repair of the electronic circuit be undertaken byanyone other than General Monitors personnel or authorized representative.Failure to comply with this requirement will invalidate the warranty.

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Problem Possible Cause Corrective Action

No output signal and greenLED in UV window is off.

No DC Power to the Unit Be sure the +24 VDC isapplied with the correctpolarity.

No output signal and greenLED in UV window is rapidlyblinking.

Low voltage FAULT (voltageat unit less than +18VDC).

Be sure that the unit ispowered with at least+20VDC under load.

2mA signal and green LED inUV window is slowly blinking.

COPM FAULT, dirty orobscured optical path (UV orIR window)

Clean UV and IR window andassociated source light rods.

Constant 8mA signal with noknown radiation to detector(FL3100 only).

Background IR radiation atdetector.

Cover IR portion of FL3100for ten seconds to determineif there is background IR. Ifthere is, remove IR Radiationsource or change FL3100location. If there is nobackground IR, replace IRdetector in FL3100.

Constant 12mA signal with noknown radiation to detector(FL3100 only).

Background UV radiation atdetector.

Cover UV portion of FL3100for ten seconds to determineif there is background UV. Ifthere is, remove UV radiationsource or change FL3100location. If there is nobackground UV, replace UVdetector tube in FL3100.

Constant 16mA or 20mAsignal (WARN or ALARM)with no known radiation atdetector (FL3101 only).

Background UV radiation atdetector.

Cover UV portion of FL3101for ten seconds to determineif there is background UV. Ifthere is, remove UV radiationsource or change FL3101location. If there is nobackground UV, replace UVdetector tube in FL3101.

Models FL3100/3101

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6.2 Final Assembly

Figure 6-A 71100 FL3100 (UV/IR), Final Assembly

LIGHT ROD

LENSUV DETECTOR

STANDOFF

CCA DETECTOR BDCCA CONTROL BD

COMM BD, SINGLE/DUAL MOBUSCA POWER BD

3 PL

UV/IR, HOUSING SUBASSY

SCR, M6 SOC HD4 PL

SCR, 8-32WASHER, #8 3 PL

ASSY, BASE

PLUG

NAMEPLATE

Models FL3100/3101

26

Figure 6-B 71125 FL3101 (UV), Final Assembly

NAMEPLATE

PLUG

3 PL

3 PL

LIGHT ROD

UV HOUSING SUBASSY

ASSY, BASE

SCR, 8-32WASHER, #8

SCR, M6 SOC HD4 PL

UV LAMP

STANDOFF

CCA DETECTOR BDCCA CONTROL BD

CCA POWER BDCCA COMM BD, DUAL MODBUS

LENS

Models FL3100/3101

27

7.0 Customer SupportGENERAL MONITORS OFFICES

Area Phone/Fax/Email

UNITED STATES

Corporate Office:26776 Simpatica CircleLake Forest, CA 92630

Phone: +1-949-581-4464Fax: +1-949-581-1151Email: [email protected]

9776 Whithorn DriveHouston, TX 77095


UNITED KINGDOMHeather CloseLyme Green Business ParkMacclesfield, Cheshire,United Kingdom, SK11 0LR


IRELANDBallybrit Business ParkGalway, Republic of Ireland

Phone: +353-91-751175Fax: +353-91-751317Email: [email protected]

SINGAPORENo. 2 Kallang Pudding Rd.#09-16 Mactech BuildingSingapore 349307


MIDDLE EASTLOB12, #G20P.O. Box 61209Jebel Ali, DubaiUnited Arab Emirates


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8.0 MODBUS InterfaceStandard Model FL3100 or FL3101 Flame Detectors include a Single MODBUSCommunications Board that is referenced as Comm 1. A Dual MODBUS featureis optional, which includes two independent communications channelsreferenced as Comm 1 and Comm 2.

NOTE - Comm 2 is utilized as a backup communications channel, therefore it isnot recommended to have both Comm 1 and Comm 2 channels activesimultaneously. If the dual Comm option is ordered, the Analog output will not beavailable.

8.1 Baud RateThe Baud Rate is a selectable setting via the MODBUS CommunicationsInterface. The selectable baud rates are 19.2K, 9600, 4800, or 2400 bits persecond.

8.2 Data FormatThe Data Format is a selectable setting via the MODBUS CommunicationsInterface. The selectable data formats are as follows:

Data Bits Parity Stop Bit Format 8 None 1 8-N-1 8 Even 1 8-E-1 8 Odd 1 8-O-1 8 None 2 8-N-2

8.3 MODBUS Read Status Protocol (Query/Response)8.3.1 MODBUS Read Query Message

Byte MODBUS Range Referenced toFL3100, FL3101

1st Slave Address 1-247*(Decimal)

FL3100, FL3101 ID(Address)(X = 0 or 1 ModelType)

2nd Function Code 03 Read HoldingRegisters

3rd Starting AddressHi**

00 Not Used by FL3100,FL3101

4th Starting AddressLo**

00-FF (Hex) FL3100, FL3101Commands

5th No. of Registers Hi 00 Not Used by FL3100,FL3101

6th No. of Registers Lo 01 No. of 16 Bit Registers7th CRC Lo 00-FF (Hex) CRC Lo Byte8th CRC Hi 00-FF (Hex) CRC Hi Byte

Models FL3100/3101

29

NOTE*- Address 0 is reserved for broadcast mode and will not be supported atthis time.NOTE**- Start Address can be a maximum of 9999 Address Locations (0000-270E)

8.3.2 MODBUS Read Response Message

Byte MODBUS Range Referenced to FL3100, FL31001

1st Slave Address 1-247* (Decimal) FL3100, FL3101 ID (Address)2nd Function Code 03 Read Holding Registers3rd Byte Count 02 No. of Data Bytes4th Data Hi 00-FF (Hex) FL3100, FL3101 Hi Byte Status

Data5th Data Lo 00-FF (Hex) FL3100, FL3101 Lo Byte Status

Data6th CRC Lo 00-FF (Hex) CRC Lo Byte7th CRC Hi 00-FF (Hex) CRC Hi Byte

NOTE - Address 0 is reserved for broadcast mode and will not be supported atthis time.

8.4 MODBUS Write Command Protocol (Query/Response)8.4.1 MODBUS Write Query Message



FL3100, FL3101 ID (Address)

2nd Function Code 06 Preset Single Register3rd Register Address

Hi**00 Not used by FL3100, FL3101

4th Register AddressLo**

00-FF (Hex) FL3100, FL3101 Commands

5th Preset Data Hi 00-FF (Hex) FL3100, FL3101 Hi ByteCommand Data

6th Preset Data Lo 00-FF (Hex) FL3100, FL3101 Lo ByteCommand Data

7th CRC Lo 00-FF (Hex) CRC Lo Byte8th CRC Hi 00-FF (Hex) CRC Hi Byte

NOTE* - Address 0 is reserved for broadcast mode and will not be supported atthis time.NOTE** - Register Address can be maximum of 9999 Address Locations (0000-270E)

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30

8.4.2 MODBUS Write Response Message



FL3100, FL3101 ID (Address)

2nd Function Code 06 Preset Single Register3rd Register Address

Hi**00 Not used by FL3100, FL3101

4th Register AddressLo**

00-FF (Hex) FL3100, FL3101 Commands

5th Preset Data Hi 00-FF (Hex) FL3100, FL3101 Hi ByteCommand Data

6th Preset Data Lo 00-FF (Hex) FL3100, FL3101 Lo ByteCommand Data

7th CRC Lo 00-FF (Hex) CRC Lo Byte8th CRC Hi 00-FF (Hex) CRC Hi Byte

NOTE* - Address 0 is reserved for broadcast mode and is not be supported atthis time.NOTE** - Register Address can be a maximum of 9999 Address Locations(0000-270E)

8.4.3 Function Codes SupportedFunction Code 03 (Read Holding Registers) is used to read status from the slaveunit. Function Code 06 (Preset Single Register) is used to write a command tothe slave unit.

8.5 Exception Responses and Exception CodesIn a normal exchange, the master device sends a query to the FL3100, FL3101.The FL3100, FL3101 receives the query and returns a normal response to themaster. If a normal communications error occurs, there are 4 possible responsesfrom the FL3100, FL3101:

1. If the FL3100, FL3101 does not recognize the query due to acommunications error, then no response is returned from the FL3100,FL3101 and the master device will eventually process a timeout condition forthe query.

2. If the FL3100, FL3101 receives the query, but detects a communication error(CRC, etc.), then no response is returned from the FL3100, FL3101 and themaster device will eventually process a timeout condition for the query.

3. If the FL3100, FL3101 receives the query without a communications error,but cannot process the response to the master within the master's timeoutsetting, then no response is returned from the FL3100, FL3101 and themaster device will eventually process a timeout condition for the query.

Models FL3100/3101

31

In order to prevent this condition from occurring the typical response times for theFL3100, FL3101 are listed below:

BaudRate(bps)

Query FromMaster(msec)

UnitResponseDelay Time toQuery (msec)

ResponseFrom Unit(msec)

Master ResponseDelay Time BetweenEnd of UnitResponse and NextMasterQuery (msec)

TotalResponseTime(msec)

19.2K 4 4 4 100 - 120* 112 1329600 8 5 8 100 - 120* 121 1414800 16 6 16 100 - 120* 138 1582400 32 8 32 100 - 120* 172 192

NOTE* - Master Response Delay Time is dependent on the speed of responsefor the Master (DCS, PLC, etc.) Cycle Time can be significantly reduced with afaster Master. The 100ms Delay Time was taken from a typical Master, using aPC with Intellution Industrial Control Software, which was set at the minimum polltime.

4. If the FL3100, FL3101 receives the query without a communications error,but cannot process it due to reading or writing to a non-existent or illegalFL3100, FL3101 Function Code, Illegal Command Starting Address orRegister Address, or Illegal Data Value, then the FL3100, FL3101 will returnan exception response message informing the master of the error.

The exception response message has two fields that differentiate it from anormal response, which is explained in Section 8.5.1.

8.5.1 Exception Responses


1st Slave Address 1-247* (Decimal) FL3100, FL3101 ID (Address)2nd Function Code 83 or 86 (Hex) MSB is set with Function Code3rd Exception Code 01 - 06 (Hex) Appropriate Exception Code (See

below)4th CRC Lo 00-FF (Hex) CRC Lo Byte5th CRC Hi 00-FF (Hex) CRC Hi Byte

Function Code Field: In a normal response, the FL3100, FL3101 echoes thefunction code of the original query in the function code field of the response. Allthe Function Codes have a most-significant bit (MSB). In an exception response,the FL3100, FL3101 sets the MSB of the function code to a one (1). With thefunction codes MSB set, the master can recognize the exception response andcan process the data field for the exception code from the FL3100, FL3101response message.

Models FL3100/3101

32

Exception Code Field: In a normal response, the FL3100, FL3101 returns dataand status in the data field, which was requested in the query from the master.In an exception response, the FL3100, FL3101 returns an exception code in thedata field, which describes the FL3100, FL3101 condition that caused theexception. Below is a list of exception codes that are supported by the FL3100,FL3101:

Code Name Description

01 Illegal Function The function code received in the query is not anallowable action for the FL3100, FL3101.

02 Illegal Data Address The data address received in the query is not anallowable address for the FL3100, FL3101.

03 Illegal Data Value A value contained in the query data field is not anallowable value for the FL3100, FL3101.

04 Slave Device Failure An unrecoverable error occurred while the FL3100,FL3101 was attempting to perform the requestedaction.

05 Acknowledge The FL3100, FL3101 has accepted the request andis processing it, but a long duration of time will berequired to do so. This response is returned toprevent a timeout error from occurring in themaster.

06 Device Busy The FL3100, FL3101 is engaged in processing along-duration program command. The mastershould retransmit the message later when the slaveis free.

8.6 Command Register Locations8.6.1 Operational Mode CommandsSee section number listed below and reference Section 8.7 for details of eachregister.

Models FL3100/3101

33

R - indicates Read Only Access R/W - indicates Read/Write Access

MasterReg I/O Refer to

Parameter Function Type Scale Access Addr Addr Section

Analog 0-20mA Current Output Value 16-Bit R 0000 40001 7.7.1

Mode Indicates Fire Status Mode Value (0-11) R 0001 40002 7.7.2

Status/Error Indicates Error Bit 8-Bit R 0002 40003 7.7.3

UV/IR Only Indicates Detection of UV Bit 2-Bit R 0003 40004 7.7.4Only or IR Only (FL3100 only)

Model Type Identifies the Model FL3100,FL3101

Decimal 310X R 0004 40005 7.7.5

(X=0 or 1 to indicate Model)

Software Rev Indicates the SoftwareRevision

ASCII 2-Char R 0005 40006 7.7.6

COPM Fault UV/IR COPM Fault Bit 2-Bit R 0006 40007 7.7.7

EEPROM Set Bit for EEPROM to Bit 1-Bit R/W 0007 40008 7.7.8Override Override Dip Switch Settings

Options Indicates Unit Options Bit 8-Bit R/W 0008 40009 7.7.9

Comm 1 Unit Address (Comm 1) Decimal (1-247) R/W 0009 40010 7.7.10Address Hex (01- F7)

Not Used 000A 40011

Comm 1 Indicates present Baud Rate Value (0-3) R/W 000B 40012 7.7.11Baud Rate (Comm 1)

(2400, 4800, 9600,19.2K)

Models FL3100/3101

34


MasterReg I/O Refer to

Parameter Function Type Scale Access Addr Addr Section

Comm 1 Indicates present Data Format Value (0 - 3) R/W 000C 4013 7.7.12Data Format (Comm 1)

(8N-1, 8E-1, 8O-1, 8N-2)

UV Indicates No. of UV Signal Value 8-Bit R 000D 4014 7.7.13Sig Count Pulses within 500 ms

IR Indicates No. of IR Signal Value 8-Bit R 000E 4015 7.7.14Sig Count Pulses within 500 ms

UV Fault Indicates Total No. of UV Value 8-Bit R 000F 40416 7.7.15Total COPM Faults

IR Indicates Total No. of IR Value 8-Bit R 1010 4017 7.7.16Fault Total COPM Faults

Remote Remotely Resets the Alarm Bit 1-Bit R/W 0011 4018 7.7.17Reset & Warn Relays

Remote Remotely Activates Alarm Bit 1-Bit R/W 0012 40419 7.7.18Alarm Test Test

Clear COPM Clears UV/IR COPM Fault Bit 1-Bit R/W 0013 40020 7.7.19Faults Counters

Comm 1 & 2 Total # of Receive Errors Value 8-Bit R 0020 40033 7.7.20TotalReceive

(Comm 1 & 2)Errors

Comm 1 or 2 Bus Activity Rate in % Decimal (0-100%) R 0021 40034 7.7.21Bus Activity Of this Addressed Node vs. Hex (0-64)Rate % Other Addressed Nodes

(Comm 1 or 2)

Comm 1 & 2 Total # of Function Code Value 8-Bit R 0022 40035 7.7.22Function Errors (Comm 1 & 2)Code Errors

Comm 1 & 2 Total # of Starting Addresses Value 8-Bit R 0023 40036 7.7.23Starting Errors (Comm 1 & 2)AddressErrors

Models FL3100/3101

35


MasterReg I/O Refer

Parameter Function Type Scale Access To Addr Addr Section

Comm 1 Only Total # of Comm 1 Only Value 8-Bit R 0024 40037 7.7.24Total Receive Receive ErrorsErrors

Comm 1 & 2 Total # of RXD CRC Lo Value 8-Bit R 0025 40038 7.7.25RXD CRC Lo Errors (Comm 1 & 2)Errors

Comm 1 & 2 Total # of RXD CRC Hi Value 8-Bit R 0026 40039 7.7.26RXD CRC Hi Errors (Comm 1 & 2)Errors

Comm 1 Only Total # of Overrun Errors Value 8-Bit R 1027 40040 7.7.27Overrun Errors (Comm 1 Only)Comm 1 Only Total # of Noise Flags Value 8-Bit R 0028 40041 7.7.28Noise Flag Errors (Comm 1 Only)Errors

Comm 1 & 2 Total # of Framing Value 8-Bit R 0029 40042 7.7.29Framing Errors Errors (Comm 1 & 2)Comm 1 or 2 Indicates Comm 1 or 2 Value 8-Bit R 002A 40043 7.7.30Message Interval Message Interval in Milli-

secondsComm 2 Only Total # of Comm 2 Only Value 8-Bit R 002B 40044 7.7.31Total ReceiveErrors

Receive Errors

Comm 1 Only Total # of Serial Comm Value 8-Bit R 002C 40045 7.7.32SCI Interrupt Interface Errors (Comm 1Errors Only)Comm 1 & 2Errors

Clear All Comm 1 & 2Errors

Bit 1-Bit R/W 002D 40046 7.7.33

Not Used 002E 40047

Comm 2 Address Unit Address (Comm 2) Decimal (1-247) R/W 002F 40048 7.7.34Hex (01-F7)

Comm 2 Baud Indicates present Baud Rate Value (0-3) R/W 0030 40049 7.7.35Rate (Comm 2)

(2400, 4800, 9600, 19.2K)Comm 2 Data Indicates present Data Value (0-3) R/W 0031 40050 7.7.36Format Format (Comm 2)

(8N-1, 8E-1, 8O-1, 8N-2)

Models FL3100/3101

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8.7 FL3100, FL3101 Operational Mode Command RegisterDetails8.7.1 AnalogA read returns a value, which is proportional to the 0-20mA output current. Thecurrent is based on a 16-bit value. The master scaling is 0-65535 decimal, whichcorresponds to the FL3100, FL3101 scaling which is 0-20mA.

8.7.2 ModeA read returns the fire status mode of the FL3100, FL3101.

Mode Decimal Value

Power-up Delay 1Warn Non-latching Only 2Warn & Alarm Non-Latching 3Warn Latching Only 4Alarm Latching Only 5Warn & Alarm Latching 6Ready State (No Fire) 7UV Only Fire (FL3100 Model Only) 8IR Only Fire (FL3100 Model Only) 9Alarm Test 10COPM Fault Detected 11

8.7.3 Status/ErrorA read returns the errors that are occurring at the present time which areindicated by bit position.

Byte Function Bit Position

Low EPROM Checksum 8 EEPROM Checksum 7RAM Test 6Low Line Voltage Check 5UV COPM 4IR COPM 3Not Used 2Not Used 1

High Reset Line Shorted 8UV 10 Minute 7Not Used 6-1

8.7.4 UV/IR OnlyA read indicates the detection of UV Only or IR Only when using the UV/IRModel FL3100.

UV Only Detected= 01 (Lo Data Byte)IR Only Detected = 02 (Lo Data Byte)High Data Byte Not Used.

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8.7.5 Model TypeA read returns the Decimal Value 3100 or 3101, which identifies each particulartype of unit by model number.

Model Version Decimal Value

FL3100 UV/IR 3100FL3101 UV Only 3101

8.7.6 Software RevisionA read returns the software revision of the FL3100, FL3101 in 2 ASCIIcharacters. (Usually a blank and then a letter revision ex. A, B, C, etc).8.7.7 COPM FaultA read returns the type of Continuous Optical Path Monitoring (COPM) Fault,which is an UV COPM Fault or an IR COPM Fault, or both. The UV COPMand/or the IR COPM Fault indicates that the UV and/or IR windows are dirty andneed to be cleaned, or that there is a hardware problem with the UV and/or IRdetection circuitry.

UV COPM Fault = 01 (Lo Data Byte)IR COPM Fault = 02 (Lo Data Byte)

High Data Byte Not Used.

8.7.8 EEPROM OverrideA read indicates the status of the EEPROM Override bit. A write commandchanges the state of the EEPROM Override bit. When the EEPROM Override bitis enabled, the options for the Detector Sensitivity, Relay Delay, RelayLatching/Non-Latching and Relay Energized/Non-Energized features are nowcontrolled by the data stored in the EEPROM and are no longer controlled by the8-position DIP Switch located on the bottom of the Power/Relay Board. Whenthe EEPROM Override bit is disabled the options are under the control of the 8-position DIP Switch. The EEPROM Override bit is located in the LSB of the LowData Byte and the High Data Byte is not used.

Function Bit (LSB) AccessEnable 1 Read/WriteDisable 0 Read/Write

EXCEPTION - If an EEPROM error occurs, then the Exception Code 04 (SlaveDevice Failure) is returned.

NOTE - By grounding the ALARM TEST input during power-up cycle(approximately 10 seconds), the FL3100, FL3101 will disable the EEPROMOverride and set the Bit = 0, thus enabling the 8-position Dip Switch.

Models FL3100/3101

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8.7.9 OptionsA read returns the status of the settings for the Detector Sensitivity, Relay Delay,Relay Latching/Non-Latching and Relay Energized/Non-Energized featureseither from the Options DIP Switch or the EEPROM depending on the setting ofthe EEPROM Override bit listed above. A write command changes the settingsfor the EEPROM only when the EEPROM Override bit is set.

EXCEPTION - If an attempt to change the EEPROM Options is made while theEEPROM Override bit is not set, then the unit shall return an Exception Code 01(Illegal Function).These Functions are indicated on the Low Data Byte and the High Data Byte isnot used.

Function Bit Position Conditions Access

Warn Energized 8 (MSB) 1 = Energized Read/Write 0 = Non-Energized

Alarm Energized 7 1 = Energized Read/Write0 = Non-Energized

Warn Latched 6 1 = Latched Read/Write0 = Non-Latched

Alarm Latched 5 1 = Latched Read/Write 0 = Non-Latched

4 8 2 1 (Time Delay in Seconds)Alarm Time Delay 2 4 0 0 1 1 Read/WriteAlarm Time Delay 1 3 0 1 0 1 Read/Write

100 75 50 (% Sensitivity)Sensitivity 2 2 0 0 1 Read/WriteSensitivity 1 1 (LSB) 0 1 0 Read/Write

8.7.10 Comm 1 AddressA read returns the Comm 1 address of the FL3100, FL3101. A write changes theaddress to the requested address. The range of the address is 1 to 247 (01 toF7 Hex). After the address has been changed to the slave unit, the MODBUScommunications will cease because the address has changed; therefore themaster will have to change its query address to the slaves new address in orderto restart the communications.

EXCEPTION - If the EEPROM write error occurs, then the Exception Code 04(Slave Device Failure) is returned.

NOTE - By grounding the RESET input during power-up cycle (approximately 10seconds), the FL3100, FL3101 Address will default to 1.

Models FL3100/3101

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8.7.11 Comm 1 Baud RateA read returns the Comm 1 baud rate of the FL3100, FL3101. A write changesthe baud rate to the requested baud rate. After the baud rate has been changedto the addressed unit, the MODBUS communications will cease because thebaud rate has changed; therefore the master will have to change its baud rate tothe slaves new baud rate in order to restart the communications.

Baud Rate Low Data Byte Access

19.2K 03 Read/Write9600 02 Read/Write4800 01 Read/Write2400 00 Read/Write

This function is indicated on the Low Data Byte and the High Data Byte is notused.

EXCEPTION - If an illegal data value is entered which is not listed above, thenthe Exception Code 03 (Illegal Data Value) is returned.EXCEPTION - If an EEPROM write occurs, then the Exception Code 04 (SlaveDevice Failure) is returned.

NOTE - By grounding the RESET input during power-up cycle (approximately 10seconds), the FL3100, FL3101 Baud Rate will default to 19.2K.

8.7.12 Comm 1 Data FormatA read returns the Comm 1 data format of the FL3100, FL3101. A writechanges the data format to the requested data format. After the data format hasbeen changed to the addressed unit, the MODBUS communications may ceaseor start producing Comm errors because the data format has changed; thereforethe master will have to change its data format to the slaves new data format inorder to restart or provide proper communications.

Data Parity Stop Format Low Data Byte Access

8 None 1 8-N-1 00 Read/Write8 Even 1 8-E-1 01 Read/Write8 Odd 1 8-O-1 02 Read/Write8 None 2 8-N-2 03 Read/Write


NOTE - By grounding the RESET input during power-up cycle (approximately 10seconds), the FL3100, FL3101 Data Format will default to 8-N-1.

8.7.13 UV Signal CountA read indicates the number of UV Signal Counts that have occurred within 500ms which is the time duration that is required to detect a fire in the UV spectrum.

Models FL3100/3101

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8.7.14 IR Signal CountA read indicates the number of IR Signal Counts that have occurred within 500ms which is the time duration that is required to detect a fire in the IR spectrum.

8.7.15 UV Fault TotalA read indicates total number of UV COPM Faults for an indefinite period of timeuntil the Clear COPM Fault command is activated. The maximum count is 255and then the counter will rollover to zero and begin counting again.

8.7.16 IR Fault TotalA read indicates total number of IR COPM Faults for an indefinite period of timeuntil the Clear COPM Fault command is activated. The maximum count is 255and then the counter will rollover to zero and begin counting again.

8.7.17 Remote ResetWriting a 1 to the bit activates the Remote Reset function that resets the Alarmand Warn Relays. The function is active momentarily and will reset automaticallyafter being used.


8.7.18 Remote Alarm TestWriting a 1 to the bit activates the Remote Alarm Test function that activates theWarn and Alarm relay turn-on along with the Analog current status. Once theAlarm Test is complete the function should be disabled by writing a zero toRemote Alarm Test and then resetting the Alarm and Warn relays by writing aone to the Remote Reset (referenced above).Function Bit (LSB) AccessEnable 1 Read/WriteDisable 0 Read/Write

8.7.19 Clear COPM FaultsWriting a 1 to the bit activates the Clear COPM Faults function that resets boththe UV and IR COPM faults. The function is active momentarily and will resetautomatically after being used.


8.7.20 Comm 1 & 2 Total Receive ErrorsA read indicates the total MODBUS Comm 1 & 2 Receive Errors that occurred inthe slave device. The maximum count is 255 and then the counter will rollover tozero and begin counting again. The total errors are an accumulation of theindividual Comm errors listed below.

Models FL3100/3101

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8.7.21 Comm 1 or 2 Bus Activity Rate %A read indicates the Comm 1 or 2 Bus Activity Rate in percent of this Slave'saddressed node versus other addressed nodes. Range of this value is in hex (0-64) which translates to decimal (0-100%).8.7.22 Comm 1 & 2 Function Code ErrorsA read indicates the number of Comm 1 & 2 Function Code Errors that occurredin the slave device. The maximum count is 255 and then the counter will rolloverto zero and begin counting again.

8.7.23 Comm 1 & 2 Starting Address ErrorsA read indicates the number of Comm 1 & 2 Starting Address Errors thatoccurred in the slave device. The maximum count is 255 and then the counterwill rollover to zero and begin counting again.

8.7.24 Comm 1 Only Total Receive ErrorsA read indicates the total MODBUS Comm 1 Only Receive Errors that occurredin the slave device. The maximum count is 255 and then the counter will rolloverto zero and begin counting again.

8.7.25 Comm 1 & 2 RXD CRC Lo ErrorsA read indicates the number of Comm 1 & 2 RXD CRC Lo Byte Errors thatoccurred in the slave device. The maximum count is 255 and then the counterwill rollover to zero and begin counting again.

8.7.26 Comm 1 & 2 RXD CRC Hi ErrorsA read indicates the number of Comm 1 & 2 RXD CRC Hi Byte Errors thatoccurred in the slave device. The maximum count is 255 and then the counterwill rollover to zero and begin counting again.

8.7.27 Comm 1 Only Overrun ErrorsA read indicates the number of Comm 1 Only Overrun Errors that occurred in theslave device. The maximum count is 255 and then the counter will rollover tozero and begin counting again.

NOTE - An overrun error occurs, when the next received byte of data tries tooverwrite an existing received data byte, which has not been processed.Therefore, the next received byte of data is lost. This can be controlled byimplementing the proper DCS or PLC Error Handling Timing Setting (ex. ReplyTimeout Setting, Delay Time, and Number of Retries) and proper Baud RateSetting.

8.7.28 Comm 1 Only Noise Flag ErrorsA read indicates the number of Comm 1 Only Noise Flag Errors that occurred inthe slave device. The maximum count is 255 and then the counter will rollover tozero and begin counting again.

8.7.29 Comm 1 & 2 Framing ErrorsA read indicates the number of Comm 1 & 2 Framing Errors that occurred in theslave device. The maximum count is 255 and then the counter will rollover tozero and begin counting again.

Models FL3100/3101

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8.7.30 Comm 1 or 2 Message IntervalA read indicates the time interval in milliseconds between Comm 1 or 2 MessageIntervals. The maximum time interval indicated is 255.

8.7.31 Comm 2 Only Total Receive ErrorsA read indicates the total MODBUS Comm 1 Only Receive Errors that occurredin the slave device. The maximum count is 255 and then the counter will rolloverto zero and begin counting again.

8.7.32 Comm 1 Only SCI ErrorsA read indicates the number of Comm 1 Only SCI (Serial CommunicationsInterface) Errors that occurred in the slave device. The maximum count is 255and then the counter will rollover to zero and begin counting again.

8.7.33 Clear Comm 1 & 2 ErrorsWriting a 1 to the bit activates the Clear Comm 1 & 2 Errors function which resetsall of the MODBUS Comm Error counters to zero. The function is activemomentarily and will reset automatically after being used.


8.7.34 Comm 2 AddressA read returns the Comm 2 address of the FL3100, FL3101. A write changes theaddress to the requested address. The range of the address is 1 to 247 (01 toF7 Hex). After the address has been changed to the slave unit, the MODBUScommunications will cease because the address has changed; therefore themaster will have to change its query address to the slaves new address in orderto restart the communications.

EXCEPTION - If the EEPROM write error occurs, then the Exception Code 04(Slave Device Failure) is returned.

NOTE - By grounding the RESET input during power-up cycle (approximately 10seconds), the FL3100, FL3101 Address will default to 1.

8.7.35 Comm 2 Baud RateA read returns the Comm 2 baud rate of the FL3100, FL3101. A write changesthe baud rate to the requested baud rate. After the baud rate has been changedto the addressed unit, the MODBUS communications will cease because thebaud rate has changed; therefore the master will have to change its baud rate tothe slaves new baud rate in order to restart the communications.

Baud Rate Low Data Byte Access19.2K 03 Read/Write9600 02 Read/Write4800 01 Read/Write2400 00 Read/Write


Models FL3100/3101

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EXCEPTION - If an illegal data value is entered which is not listed above, thenthe Exception Code 03 (Illegal Data Value) is returned.EXCEPTION - If an EEPROM write occurs, then the Exception Code 04 (SlaveDevice Failure) is returned.

NOTE - By grounding the RESET input during power-up cycle (approximately 10seconds), the FL3100, FL3101 Baud Rate will default to 19.2K.

8.7.36 Comm 2 Data FormatA read returns the Comm 2 data format of the FL3100, FL3101. A writechanges the data format to the requested data format. After the data format hasbeen changed to the addressed unit, the MODBUS communications may ceaseor start producing Comm errors because the data format has changed; thereforethe master will have to change its data format to the slaves new data format inorder to restart or provide proper communications.

Data Parity Stop Format Low Data Byte Access8 None 1 8-N-1 00 Read/Write8 Even 1 8-E-1 01 Read/Write8 Odd 1 8-O-1 02 Read/Write8 None 2 8-N-2 03 Read/Write


NOTE - By grounding the RESET input during power-up cycle (approximately 10seconds), the FL3100, FL3101 Data Format will default to 8-N-1.

Models FL3100/3101

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9.0 Appendix9.1 Principle of Operation

9.1.1 UV Detector - FL3100 & FL3101The Model FL3101 is a Flame Detector, which contains an ultraviolet phototubethat responds to Ultra-Violet (UV) radiation in the 185 to 260 nanometer region(Figure 9-A). When radiation from a flame reaches the cathode plate within theUV detector tube, electrons are ejected from the cathode plate. These electronsare accelerated towards the positively charged anode of the tube. They collidewith molecules of an ionizable gas, with which the tube is filled. This emits moreelectrons and produces an avalanche condition. More electrons are releasedwhich creates a momentary electron flow from the cathode to the anode. Thismomentary current (pulse) recurs at a rate proportional to the intensity of the UVradiation.

The Model FL3101 UV Flame Detector processes these UV pulses with amicrocomputer and produces the following outputs:

4 to 20 Milliampere (mA) signal Immediate WARN relay contacts Time delayed ALARM relay contacts FAULT relay contacts RS-485 MODBUS RTU output Optional: Redundant RS-485 MODBUS RTU output

(See Sections 3, and 8.2, for more information on detector outputs.)

Figure 9-A Spectral Response of UV and IR Detectors

Rel

ativ

e En

ergy

Ultraviolet Region Visible Region Infrared Region

Sun's RadiationReaching the Earth

Wavelength185nm 260nm 4.35um

IR Detector'sSpectral SensitivitySensitivity

Spectral UV Detector's

Models FL3100/3101

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9.1.2 UV/IR Flame Detector - FL3100The Model FL3100 is a discriminating UV/IR Detector, which makes use of anultraviolet radiation sensitive phototube in addition to an infrared detector. Thiscombination provides a flame detection system, which is highly immune to falsealarms.

The UV portion of the detector, as described in UV Detector, is combined with aninfrared detector, which responds to changes in the intensity of infrared radiation.By sensing very specific wavelengths in both the UV and IR spectra (Figure 9-A)and then processing these signals with a microcomputer, a very high degree ofdiscrimination is achieved.

Incorporated in the IR circuitry is a flicker discrimination circuit. This permits thedetector to ignore steady IR sources such as hot objects. The inherent flickeringof a flame provides the necessary modulation to activate the IR circuit.

Since a flame is a copious source of both ultraviolet and infrared radiation,discrimination is provided when both UV and IR emissions are detected. If onlyUV is detected, as in the case of arc welding, no alarm is given. If only IR isdetected, such as a large modulating hot object, no alarm is given. However, ifboth conditions are met in the correct combination and intensity, as determinedby an algorithm in the microcomputer, a fire is identified and the alarm outputsare activated.

COPM CircuitryA self-testing feature called Continuous Optical Path Monitoring (COPM) checksthe optical path, the detector(s), and the related electronic circuitry once everyminute. If foreign material impairs the optical path of the UV detector tube (bothModels FL3100 and FL3101) or the infrared detector (Model FL3100 only) for twoconsecutive checks, the unit will indicate FAULT. The optical FAULT outputs area 2.0mA signal, de-energizing of the FAULT relay, and RS-485 output signal (seeSection 3.3 Terminal Connections). After a COPM FAULT, a COPM check isperformed every 7 - 8 seconds until the fault condition is removed. Then theCOPM check will resume a once per minute check.

WARNING - Dirty or partially blocked windows can significantly reduce thedetectors field of view and detection distance.

NOTE - Since the optical path is checked once per minute and it requires twocheck failures to produce a FAULT, it may take up to two minutes for the unit todetect an obstruction.

Alarm TestThe Models FL3100 and FL3101 Flame Detectors have a built-in Alarm Testfeature. By connecting one contact of a SPDT momentary switch to TB1 position4 and the other contact to DC COM TB1, position 9 and 10 (see Section 3.3Terminal Connections), the user can test the alarm outputs of the Flame Detectorby activating this switch for one to eight seconds depending on the Alarm TimeDelay Setting.

Models FL3100/3101

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If the Flame Detector detects these sources, it will immediately go into WARNand then into the time delayed ALARM. After one to eight seconds the FlameDetector will reset the non-latching WARN and/or ALARM. A latching WARNand/or ALARM will remain latched until manually reset. If the Flame Detectordoes not respond to the sources, it will output a FAULT condition and will retestevery ten seconds, as in the COPM FAULT case.

Visual IndicatorsTwo light emitting diodes (LEDs) are visible through the UV window (the largerwindow). LEDs are provided for a visual indication that corresponds with thedetectors outputs. The following blinking sequence indicates the operationcondition:

Timeout (10 seconds when the unit is first powered) - Green and red LEDsblinking alternately

Ready - Green LED that flashes off 1 second, every 10 seconds WARNING - Slow blinking red LED with green LED on steady ALARM - Fast blinking red LED with green LED on steady COPM FAULT - Slow blinking green LED Low Voltage FAULT/Shorted Reset Switch - Fast blinking green LED

9.2 Specifications9.2.1 Sys

Documents

FL3100_FL3101_MAN