1

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Fi 41.85(2)GB

SpecificationType: NAF LinkIT, intelligent, electro-pneumatic,valve controller, product code no. 370991-

Function: NAF-LinkIT converts an analog or digitalelectrical signal from control systems and electroniccontrollers using the HART- communication signalsuperimposed on the 4 to 20 mA analog controlsignal.to a predetermined position for a pneumaticactuator. Analog / digital or pure digital signals canbe used via FOXCOM, Profibus or FoundationFieldbus.

Control parameters and alarm limits can beconfigured by means of local keys, or on versionswith communication (HART, FOXCOM, Profibus, orFieldbus Foundation) remote, with hand-heldterminal, PC, or DCS system.

With applicable software,NAF-LinkIT can also beused to provide diagnostics of valve condition.

Application: Can be mounted directly on a NAFactuator, or with a mounting kit on other pneumaticrotary actuators.The spindle sleeve of the NAF actuator has a slot toreceive the positioner spindle. A driver pin thentransfers the rotary motion from the actuator to thevalve positioner. The driver pin is spring-loaded fortransmission without backlash.

Design: NAF-LinkIT has a very robust and ruggeddesign made for severe applications in the processindustry.

The valve controller has a very high air outputcapacity to fit on large size actuators and valves.NAF-LinkIT is equipped with an integrated beaconindicator visible through the transparent cover. Thebeacon has red indicator markings for 90° rotationangle.

Maintenance and installation instruction

NAF-LinkIT, IntelligentValve Controller

2

TABLE OF CONTENTS:

CONTENT PAGE

1 METHOD OF OPERATION 31.1 General 31.2 Block diagram 31.3 Operation 31.3.1 Analog mode 31.3.2 Digital mode 31.3.3 Introduction to operating modes 32 LABELS 53 DESIGN 63.1 Pneumatic accessories 74 MOUNTING TO

LINEAR ACTUATORS 8Not applicable

5 MOUNTING TO ROTARYACTUATORS 8

5.1 Type of mount 85.1.1 Preparation of the positioner 86 PNEUMATIC CONNECTIONS 97 ELECTRICAL CONNECTION 98 START-UP 108.1 General 108.2 Setting by means of local keys 108.2.1 Operating modes of the positioner 10

Operation with local keys 10Table 2: Menu 11Table 3: Parameter / Functions 12

8.2.2 Description of menus 148.3 Configuration by means of hand-held

terminal, PC or I/A Series system 229 DECOMMISSIONING 2210 TROUBLE-SHOOTING GUIDE 2310.1 Errors detected during initialization 2310.2 Errors detected during self-test 2310.3 Diagnosis without LED codes 2410.4 Messages

CONTENT PAGE

11 MAINTENANCE 2711.1 General 2811.2 Supply filter replacement 2711.3 Removal of the electronics unit 2711.4 Replacement of mechanical and

pneumatic units 2711.4.1 Amplifier replacement 2711.4.2 Preamplifier replacement 2711.4.3 IP-module replacement 2711.4.4 Feedback unit replacement 2711.5 Angle calibration 2811.6 Jumper settings 2912 OPTIONS 3012.1 „Additional In-/Outputs“ 3012.2 „Built-in pressure sensors“ 3013 SYSTEM CONFIGURATION 3213.1 With HART Communication 3313.2 With FOXCOM Communication

(4-20 mA) 3413.3 With FOXCOM Communication

(digital) 3514 PHASE DIAGRAMS 3614.1 NAF-LinkIT with

communication HART 3614.2 NAF-LinkIT with

communication FOXCOM 3615 SAFETY REQUIREMENTS 3815.1 Accident prevention 3815.2 Electrical safety 3815.3 Explosion protection 3815.4 EMC and CE 3816 DIMENSIONS 39

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Fi 41.85(2)GB

single acting or double acting pneumatic amplifier 14 through the preampifier 13. The output of the amplifier14 is the output pressure y (y

1,y

2) to the actuator.

The pneumatic amplifiers are supplied with supply airs 1.4 ... 7 bar (20 ... 100 psig).The position x of the actuator is sent to the controlunit 11 by the position sensor (conductive plastic) 15 and is independently displayed at the mechanicaltravel indicator 16 .

Optional pressure sensors 19 , 20 , inputs / outputs21 (two binary outputs; a 4-20 mA output and alarm;control inputs for ‘Open/Close’ and ‘Hold last value’)enable additional diagnostic indications and possibleintervention. The mechanical limit switch 22 (optional)enables independent alarm signals.

Adjusting, start-up of the positioner as well as thedemand for internal information can be made using thelocal keys 17 with indication given by LEDs 18 .HART and FOXCOM versions: For the HART unit,start-up and the demand for internal information canbe made using hand-held terminal or a PC. For aFOXCOM unit, a PC or I/A Series System may beused.

1.3.2 Digital modeDuring digital operation a DC voltage is provided atinput w. On this voltage a FSK-signal is modulated.The modulation contains information (eg setpointvalue), sent digitally to the control unit 11 across the FSK-unit 8 .

Inquiry commands enable information to be sent fromthe unit to the user. The remaining modes ofoperation do not differ from operation with an analoginput.

1.3.3 Introduction to operating modesOperation of the positioner is divided into individual‘operating modes’. Operating modes may changedepending on, for example, key commands or internalcalculations.The different operating modes are described inabbreviated form below. On page 36 the operatingmodes are shown graphically in a ‘mode diagram’.

1 METHOD OF OPERATION1.1 GeneralThe intelligent positioner NAF-LinkIT 1 and thepneumatic actuator 2 form a control loop with thesetpoint value w (from master controller or controlsystem), the output pressure y and the position x ofthe actuator on valve 3 .The positioner can be attached to both linearactuators and rotary actuators.Actuators with spring force are controlled by a singleacting positioner. Actuators without spring force arecontrolled by a double acting positioner. Thepositioner can be operated locally by means of localkeys.

HART and FOXCOM versions:The positioner NAF-LinkIT can be operated locally orremotely by means of a hand-held terminal 4 , a PCor I/A Series System (FOXCOM).

For the supply air, we recommend the FOXBOROECKARDT FRS923 filter regulator.

1.2 Block diagram

1.3 Operation

1.3.1 Analog mode

During analog mode operation (point to point) thecurrent signal 4 ... 20 mA at the input w is convertedto supply voltage by the voltage converter 7 .Thecurrent value is measured, converted by the A/Dconverter 9 and flows through switch10 to the digitalcontrol unit 11 containing the micro processor . Thisoutput drives the analog operating electromechanicconverter (IP module) 12 , which controls the analog

x

w

y

1

3

2

4

10

11 12 13 14

15

17

18

16

1920

21

U

const.

FSK

I

P

Cµ7

8

9

22

A

D

D

4

INITIALIZE:Upon power-up or Reset , several self-tests areconducted. Individual steps in the self-test processare indicated by the green LEDs.

If no error occurs the device moves to OUT OFSERVICE, if it is still in a delivery condition;AUTOSTART has to be performed. If AUTOSTARTwas done already, the device will go to IN SERVICE.

If faults are detected, code of the faulty self-test willstop (see chapter 10). If error reoccurs after reset,the device is probably defect and should be sent infor repair.

FAULT:In the event that the red LED lights up constantlyand all green LEDs are off, a device fault is signaled.These faults are detected during cyclical self-test.The device can no longer be operated. This could becaused a. o. by a depressed menu key, defectprogram memory, etc. (see chapter 10 „Trouble-shooting“).This condition disappears through new resetting untilthe same error is detected again. If a device erroroccurs repeatedly, the device should be sent in forrepair.

IN SERVICE:After performing function AUTOSTART, the devicemoves to IN SERVICE and will move to IN SERVICEalways after restarting or resetting.

OUT OF SERVICE:The NAF-LinkIT in its delivery condition is configuredin such a way that it will remain OUT OF SERVICEafter turn-on until moving to IN SERVICE via themanually initiated function AUTOSTART.

In OUT OF SERVICE the menu entering moderemains active at all times. If a device, having beenIN SERVICE already, is removed from an actuatorand mounted to another actuator it is recommendedto take the device off operation via RESET CONFIG.prior to disconnecting the device from the firstactuator. This enables the next actuator to bestarted in the delivery condition.

CALIBRATE:During functions AUTOSTART and SHORT-AUTOSTART the device is in conditionCALIBRATION. The actuator is moved up- anddownwards several times, and the device could bebusy for a longer period of time. Subsequently, thedevice moves to IN SERVICE.

MESSAGE:The NAF-LinkIT constantly supervises its importantdevice functions. In the event limit values areexceeded or operational problems occur, messagesare signaled via the special blinking mode: red LEDwith long, green LEDs with short fluorescent time.The message with the highest priority will beindicated first. Further messages may be called upvia keys UP resp. DOWN. It is possible at all timesto reach the menu by pressing the menu keys topossibly eliminate the problem by performingsuitable menu functions. Further references may befound in chapter 10 „Trouble-shooting“.

FAILSAFE:This mode only applies to units having digitalcommunication capability.Positioner carries out actions as configured in menu„failure handling“. Additionally, the cyclical self-diagnosis takes place.

The brief descriptions above are only intended toprovide a quick overview on the mode of operation forthe NAF-LinkIT.State diagrams for the unit versionsNAF-LinkIT—H: with HART communicationNAF-LinkIT—F/ -E:with FOXCOM communicationare explained in greater detail on page 36.

Definition of the LEDs and possible operatorinterventions are described in chapter 8: START-UP.

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A

2 LABELS

NameplateB Additional label FM/CSA or optionsC Additional label for option „Limit switches“D Labeling of electronicsE Brief description inside cover

Nameplate (Example A)Without Ex-protection

Nameplate (Example A)Classified intrinsically safe by CENELEC. Type ofprotection "EEx ia"SRD [ Device specification, Model Code ]

SER.No [ Serial number ]ECEP [ Number for special engineered version ]

Additional label at option „Limit switches“(Example C)

Additional manufacturing data are stored in thesoftware and are read via communication interface(see chapter 8.4)

SRD

TEMP. Tu : - 20˚C ... 80˚C

SER.No ECEP

ZULUFT / SUPPLY : max. 6 bar ( 90 psi )

DOPPELT / DOUBLEEINFACH / SINGLE

FOXCOM IT2FOXCOM IT1

EINGANG / INPUT : 4 ... 20 mA HART

MADE IN FRANCE (4)

REV.

SRD

EINGANG / INPUT :

TEMP. Tu : - 20˚C ... 80˚C

SER.No

TYPE BIA 637PTB Nr. Ex-96.D.2175

EEx ia IIC T4

ECEP

MADE IN FRANCE

(5)

ZULUFT / SUPPLY : max. 6 bar ( 90 psi )

= 900 mWPmax.C i = 1,4 nFUmax. = 30 V

REV.

I max. = 130 mA Li = 0 mH

DOPPELT / DOUBLEEINFACH / SINGLE4 ... 20 mA

FOXCOM IT2FOXCOM IT1HART

GRENZWERTGEBERLIMIT SWITCH

INDUKTIV KONTAKTINDUCTIVE CONTACT

A Siebe Group Product

Type BIA 637K EEx ia IIC T4

PTB Nr. Ex-96.D.2175U = 16V ; I = 76 mAP = 242 mWC = 60 nF ; L = 100 uH

i i

i

i

i

MA

DE

IN F

RA

NC

E(0

)

A

DB

C

C

6

1. Cable gland PG 13.52. Plug interchangeble by pos.13. Screw terminals 11+ 12- for input (w)3a. Screw terminals for options4. Ground connection5. Female thread 1/4-18 NPT for air supply6. Female thread 1/4-18 NPT for air output II (y2)7. Female thread 1/4-18 NPT for air output I (y1)8. Direct connection hole for output I (y1)9. Feedback shaft10. Connection manifold for mounting to linear actuator11. Connection base for mounting to rotary actuators12. Travel indicator13. Key UP14. Key DOWN15. Key M16. Status display (1 red LED, 4 green LEDs)17. Damping screw for output I18. Damping screw for output II19. Shaft for limit switch connection20. Cover22. Name plate

3 DESIGN

911

26

22

10

12

12

5

6

7

19

13

14

15

7

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Code LEXG -M:Connection manifiold

3.1 Pneumatic AccessoriesWhen mounting, check the proper seating of the O-rings and bolt on the accessories with the two M8bolts. Unused outputs are closed by means ofplastic plugs.

8

4 MOUNTING TO LINEARACTUATORS

Not applicable for this unit.

5 MOUNTING TO ROTARYACTUATORS

5.1 Type of mountApplicable to rotary actuators that meet the VDI/VDE 3845 standard for mounting or NAFmanufactured actuators. Installation position ofpositioner: Mount the positioner so that thepneumatic connections are in the same direction asthe longitudinal drive axis of the actuator as shown inthe photograph below.

Attention: The feedback shaft 9 of the NAF-LinkIThas no mechanical stop, therefore may spin round. The permissible rotation angle range is between +50and –50 degrees around the arrow at the housingconcerning the flat area of the feedback shaft (alsosee detail page 13 bottom). Since a rotary actuatorhas a rotary angle of about 90 degrees the mountingas described in the following must be carried out veryprecise.

Attachment of the positioner to actuators notmanufactured by NAF is made by using the rotaryadaptor kit EBZG -R.

Pneumatic connections: Do not use Teflon tape forsealant. The fine fibres could disturb the function ofthe NAF-LinkIT. Use only Loctite® #243 for sealant1).

Screw-type glands for electrical connections areused as needed. Any unused threaded holes areclosed by plugs.

Caution! Prevent accumulation of water in theinstrument in this mounting position by sealing cableentry against water. Provide a continuous supply ofdry instrument air.

1) Apply only to male thread.

5.1.1 Preparation of positionerValve must be in failsafe position and the direction ofrotation of the actuator drive shaft must be known. These items are extremely important for properfunctioning. These items can be checked as follows

in case they are not clear:

In the single-acting actuator the force of the installedsprings closes. The pressure-less actuator is infailsafe position. Through manually feedingcompressed air it can be seen whether the actuatordrive shaft rotates to the left or to the right. In thepowerless NAF-LinkIT is y1 pressureless.

In the double-acting actuator without spring resetboth air chambers are basically equal. Failsafeposition can be either „open“ or „close“. Therefore,indication of the failsafe position has to bedetermined by engineering. Then the direction ofrotation may be determined by manual feeding ofcompressed air. In the powerless NAF-LinkIT y1pressureless and y2 under pressure.

Bolt 2 is screwed into actuator drive shaft 1 forsubsequent centering of the rotary adaptor 3 . Theattachment console is mounted to the strokeactuator (see photo).

Attachment diagram for bracket

Rotary adaptor

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Fi 41.85(2)GB

6 PNEUMATIC CONNECTIONS

Following alignment and mounting of the positionerto the valve, pneumatic tubing has to be provided.

Explanation of abbreviatons:s Supply airy1-d Output 1 for direct mounting, depressurized at

currentless electronics. When using thisoutput y1 has to be closed by means of hex.screw.

y1 Output 1, depressurized at currentlesselectronics. When using this output, y1-d hasto be closed by means of sealing screw andO-ring.

y2 Output 2 for double-acting actuator. Fullpressure at currentless electronics. Closed atsingle-acting actuator.

n1 Hex. Screw with NPT threadn2 Sealing screw with O-ring

7 ELECTRICAL CONNECTIONThe safety requirements on page 38 must beobserved!Unused cable glands should be closed off. Feed in the cable through the gland 1. The gland issuitable for cable diameters of 6 to 12 mm. Observethe tightness of the cable entry.Make the electrical connection of the input line at thescrew terminals 3 marked with 11+ and 12 - . Theterminals are suitable for wire cross-sections of 0.3to 2.5 mm2 (22 -14 AWG).

Connection of options (see terminals below item 3 ):

Note: When connecting shielded cable connectthe cable shield only to the system! Do not connectthe cable shield to the NAF-LinkIT!

Optional equipment ‘limit switch’ (see terminals 40 )

For enhancement of EMC-protection by connectionto a local ground the internal and external groundterminal 4 can be used.

At the tip jacks 23 + and 23 - the input current canbe measured. For that purpose the switch 24 should be on ‘1’. In normal position (‘ON’) the bothtip jacks 23 are short circuited.

Version HART or FOXCOM:At the tip jacks 23 + and 25 - a hand-held terminal ora modem can be connected for communication.

The tip jacks fit plugs with a diameter of 2 mm.

Explanation of abbreviations:Setp. Input Setpoint value

(Analog 4 to 20 mA or digital)AB Binary output ext. suppliedEB Binary input for ext. switchAI Analog output 4 to 20 mA for

position feedbackGW Binary output ext. supplied

M-noitpO)snoitpoow(

P-noitpOyranib2stuptuo

B-noitpOstupniyranib2

Q-noitpO.bdeef.soP1

mralA1

kraM langiS kraM langiS kraM langiS kraM langiS

+11 .pteS +11 .pteS +11 .pteS +11 .pteS

-21 .pteS -21 .pteS -21 .pteS -21 .pteS

+18 1BA +31 1BE +18 1BA

-28 1BA -41 1BE -28 1BA

+38 2BA +51 2BE +38 IA

-48 2BA -61 2BE -48 IA

rosnesevitcudniaiv,U,T-noitpO

kraM langiS

+14 1WG

-24 1WG

+15 2WG

-25 2WG

10

8 START-UP8.1 GeneralFirst of all, the nameplate should be checked,especially with respect to indications referring to Ex /non- Ex, input signal, communciation, output signal,single / double acting, additional inputs / outputs.

Before starting the positioner the NAF-LinkIT has tobe mounted to the actuator; an input signal and airsupply must be connected. The supply airconnection must have sufficient capacity andpressure of 1.4 - 6 bar (20...90 psig) and should notexceed the maximum operating pressure of theactuator.The NAF-LinkIT can be adjusted by means of a localkey-pad when the cover is off.

Attention: Configuration using local keys or thecommunication interface may interferewith operation of the actual process !

During configuration it is recommended that there is no flow through the valve.

Versions with HART or FOXCOM communicationhave an extended function range. Setting functions inthe communication mode is accomplished by meansof a hand-held terminal, a PC or an I/A Seriessystem (FOXCOM). In this case the local key-pad atthe positioner can be locked-out to the user (seechapter 8.4).

If there is no response using the local key-pad (orhand- held terminal) make shure that the WriteProtection is not set !Remove the write protection using WPP991 software(HART) or PC20 / IFDC software (HART / FOXCOM)

For first start-up it is recommended to first performconfiguration of „Actuator System, Mounting Side“(see chapter 8.2.2, menu 1), thereafter an Autostartresp. Short Autostart (see chapter 8.2.2, menu 2resp. 10).After selecting the gear ratio of the travel indicator 12put the travel indicator on the gear shaft in thedesired position and fit to the mark on the window inthe housing cover (see page 31).When putting on the housing cover note that the airvent should face-down.

8.2 Setting by means of local keysSetting up the positioner functions is carried out byusing the local keys 15 (M), 13 (UP), 14 (DOWN).

M (Menu) start menu / end menuUP / DOWN counting up/down of menu

numbers resp. parameternumbers

UP + DOWN simultaneously:confirm at start, or whenentering, storing, or verifying

M + UP + DOWN simultaneously:Reset = new start of NAF-LinkIT,thereafter initialization 1)

Attention: Do not touch behind the positionerhousing while operating the keys!

D A N G E R O F I N J U R I E S !The LEDs 16 serve as indication in the followingdifferent methods:1 constant light, ON¼ flashing: short ON, long OFF¾ flashing: long ON, short OFF 2)

½ flashing: ON and OFF same duration- OFFOverview: Description of LEDs

Red and green LEDs counter-flash.

8.2.1 Operating modes for local key operationINIT: Initialization1) after new start of device takesabout 10 seconds and is concluded when all LEDsare off (device is IN SERVICE) or if flash mode ofmenu 1 appears (device is still OUT OF SERVES;start-up is required).Menu: Selection is summarized in Table 2. Parameters and sub-menu selection are summarizedin Table 3, the sub-menu parameters in Table 4.Message: NAF-LinkIT detected a problem. In orderto continue operation, user has to eliminate problemthrough suitable measures.FAULT:NAF-LinkIT detected error during self-test and is nolonger ready for operation, see chapter 10.2:Troubleshooting.

1) All data stored in NAF-LinkIT is not affected by this andremains unchanged2) In NAF-LinkIT with option „Built-in pressure sensors“ flashingis superimposed by a flickering.

sDEL

noitpircseDder neerg

M 1 2 3 4

- i i i i sesahptiniwohssDEL:TINI

- - - - - noitarepolamroN

2/1 x x x x unem=xxxx:noitcelesuneM

4/1 y y y y uenmbus=yyyy:unemBUS

- u u u u deddauuuuRETEMARAP

4/3 z z z z zzzz.oNegasseM )2

1 - - - - TLUAF

11

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Fi 41.85(2)GB

Operation with local keys

Table 2:Menu

½ = ON and OFF flashing same duration

1) Exception in Menu 6. No parameter indicated at first, butflashing rhythm with long green and short red phases. Thispoints to a sub-menu. Then entry into parameter selection as described.

• Enter the Menu mode by pressing the M key. The red LED flashes alternately with the greenLED1, which indicates the Menu item 1.• Select the desired Menu item by pressing theUP (or DOWN) key, see table 2.Each press of the key moves one menu item forward(or back). The flashing green LEDs indicate theselected menu item.LED test before configuration: Move form menu item1 to 4 and inspect that each LED lights.• Simultaneously pressing the UP and DOWNkey confirms the selected menu item and enters theParameter change mode for the selected menu item.The red LED goes off and the remaining green LEDindicate the parameter or state to be set1).To set a parameter see Table 3: Parameter• Leave Menu mode by pressing M key. Redand green LEDs extinguish when device is INSERVICE. If device remains in menu mode it still isOUT OF SERVICE and AUTOSTART has to beinitiated.

M

M

DNUP

M

UP

UP

DN

DN

UPDN

1–

Parameter

1

2

3

4

5....

123456789

10

Enter Para.*

Enter menu

back

Save*selection

save and back to menu

* Local keys DOWN and UP simultaneously

Menu

Ch.curve

Autostart or Short Autostart

IN SERVICEi.e.

CancelwithoutsaveLED ON

LED OFFLED flashing 1/2 ON, 1/2 OFF

linearequal perc.inv.equ.perc.custom

Key UPKey DOWN

hsalfsDEL

uneM noitpircseD

der neerg

M 1 2 3 4

½ ½ 1 ,metsysrotautcAedisgnitnuom

½ ½ 2 tratsotuA

½ ½ 3 noitcnufevlaV

½ ½ 4 tnioptesfocitsiretcarahC

½ ½ ½ 5 langistupni,stimillevarTegnartilpsrofegnar

½ ½ ½ 6 noitisoprofretemaraPrellortnoc

½ ½ ½ 7 fognitteslaunaMtuptuocitamuenp

½ ½ ½ 8 evlavfognitteslaunaMnoitisop

½ ½ ½ 9 rofsnoitcnufnoitarbilaCpohskrow

½ ½ ½ 01 tratsotuatrohS

12

Table 3: Parameter / Functions

3) Input value stands for current value for setting at inputterminals (0% = 4 mA, 100% = 20 mA).4) For respective option only.5) See page 15.

1) These functions are inaccessible during configuration todigital set value source2) If error is detected, message will be signaled

:uneMmorfsDEL

sDEL noitpircseD xeyrotcaf

I4I3I2I1IIMI M 1 2 3 4morf2.veR

1

I-I-I-I½II½I

,metsysrotautcAedisgnitnuom

1 gnitnuomtceridrodnah-tfel,rotautcaraeniL X

1 gnitnuomdnah-thgir,rotautcaraeniL

1 esiwkcolc-retnuocgninepo,rotautcayratoR

1 esiwkcolcgninepo,rotautcayratoR

2

I-I-I½I-II½I

tratsotuA

1 1 ND+PUaivtratS.tratsrofydaeR

1 yrtemoegenimreted:tratS

1 retemarapmetsyslortnocdroceR

1 noitpadacimanydrofstsetpmuJ

1 evasdnatluserkcehC

ECIVRESNI:noitidnoC

3I-I½I-I-II½I

noitcnufevlaV1 eulavtnioptesgnisaercnitasnepoevlaV X

1 eulavtnioptesgnisaercnitasesolcevlaV

4

I½I-I-I-II½I

focitsiretcarahCtnioptes

1 wolfdnanoitisopneewtebenilcitsiretcarahcraeniL X

1 05:1oitarnicitsiretcarahcegatnecreplauqE

1 )gninepokciuq(citsiretcarahcegatnecreplauqeesrevnI

1 citsiretcarahcmotsuC )5

5

I-I-I½I½II½I

dnastimiLevlavfosmralA

1 eulavtupniottessitimilgnisolC )3 %0

1 eulavtupniottessitniopgnilaesthgit-%0 )3 %0

1 eulavtupniottessitniopgnilaesthgit-%001 )3 %001

1 eulavtupniottessitimilgninepO )3 %001

1 1 eulavtupni:%0egnartilpS )3 %0otsdnopserroc Am4

1 1 eulavtupni:%001egnartilpS )3 %001otsdnopserroc Am02

1 1 mralanoitisoprewoL )4 eulavtupniottessi1tuptuono )3 %01-

1 1 mralanoitisopreppU )4 eulavtupniottessi2tuptuono )3 %011

6

I-I½I-I½II½I

rofretemaraPrellortnocnoitisop

ot1foseulavhtiwhcae,sretemaraplortnocrofsunembuS)4elbatees(dedocyranib51

4/1 4/3 'evlavesolc'rofnoitacifilpmalanoitroporP 8

4/1 4/3 4/3 'evlavnepo'rofnoitacifilpmalanoitroporP 1

4/1 4/3 'evlavesolc'rofemitnoitargetnI 8

4/1 4/3 4/3 'evlavnepo'rofemitnoitargetnI 4

4/1 4/3 'evlavesolc'rofemitgnitteS 4

4/1 4/3 4/3 'evlavnepo'rofemitgnitteS 4

4/1 4/3 4/3 ecnereffidlortnocrofenozlartuendettimreP 2

7

I½I-I-I½II½I

tuptuocitamuenP

1 spets7gniwollofdnaeulavtratS

1 spets8retfa

1 spets61retfa

1 eulavdneotspets42retfa

13

9.01

Fi 41.85(2)GB

Attention: During execution of functions marked withX the configuration of menus 1,3, 4, 5, and 6 isreturned to „ex factory“ setting (see gray boxes forvalues)!

In the moment when the parameters are saved theLEDs extinguish for a short time.

1) These functions are inaccessible during configuration todigital set value source.2) Detected errors are signaled via message

Table 3 (continued)

Additional parametersThe following parameters are accesible via communication only:

:uneMmorfsDEL

sDEL noitpircseD xeyrotcaf

I4I3I2I1IIMI M 1 2 3 4morf2.veR

8

I-I½I½I-II½I

fognitteslaunaMnoitisopevlav

)eulavtneserp=eulavgnitrats(tnioptesfoecnawollA X

1 %0

1 1 %5,21

1 %52

1 1 1 %5,73

1 1 %05

1 1 1 %5,26

1 %57

1 1 %5,78

1 %001

9

I½I-I½I-II½I

noitarbilaCrofsnoitcnuf

pohskrow

1dewollof>-'yrotcafxe'gnittesotnoitarugifnocfognitteseR

ECIVRESFOTUOnoitidnocyb X

1 Am4ottnerructupnietarbilaC )1

1 1 Am02ottnerructupnietarbilaC )1

1 54-oteulavgnirusaemnoitisopetarbilaC O

1 1 54+oteulavgnirusaemnoitisopetarbilaC O

1'yrotcafxe'ot)!(noitarbilaCdnanoitarugifnocfognitteseRTUOnoitidnocretfaerehT>-tuptuognitca-elgnisrofgnittes

ECIVRESFOX

1 1'yrotcafxe'ot)!(noitarbilaCdnanoitarugifnocfognitteseRTUOnoitidnocretfaerehT>-tuptuognitca-elbuodrofgnittes

ECIVRESFOX

1 1foAm02-4tuptuotnerrucrofnoitcnufnoitarbilacfotratS

kcabdeefnoitisop )1

01

I½I½I-I-II½I

tratsotuAtrohS

1 1 .NWOD+PUaivtratS.tratSrofydaeR

1 yrtemoegenimreteD:tratS

1 retemarapmetsyslortnocdroceR

ECIVRESNI:noitidnoC )2

retemaraP yrotcafxe

eulavtimilecnereffidlortnoC %5

emitesnopserecnereffidlortnoC nim1

siseretsyhgnilaeS %5,0

noitcA-efasliaF FFO

noitcapu-rewoP ECIVRESNI

noitcetorpetirwretemaraP ffO

sekortslatotroftimilmralA M09

selcyclatotroftimilmralA M09

selcycevlavrofdnabdaeD %1

xxFxedoCledoM:ecruoseulavteS latigid

srehtolla:ecruoseulavteS golana

tuptuomralaesaeleR 11-2.sseM

mrala-erpreppU %001

mrala-erprewoL %0

smralanoitisoprofsiseretsyH %5,0

Complete parameter list see PC20/IFDC software.

14

Attention: Autostart overwritesprevious control parameters!

Autostart is selected if green LED1 and LED4 are lit.After start (by simultaneous pressing of DOWN andUP keys) the function taking several minutes can befollowed at the green LEDs.Duration on a valve position can take some timedepending on actuator volume, air supply, pressure,etc.

Moving direction, mechanical starting and endingpositions are determined by one or several passagesof valve position range.

Ramps are entered and control system parameter isdetermined (ratio position/valve size).

Jumps are entered for determination of controlparameters.

Determination of positioning speeds.

Direction of movement, starting position, endingposition as well as control system parameter aresaved; previous values are superscribed. NAF-LinkITis again IN SERVICE with detected new mechanicalstops and control parameters.Abort of automatic run by Reset (simultaneouspressing of M, DOWN and UP key) is possiblebefore LEDs are off. Values of previous Autostart arethen preserved.If Autostart shows that the direction of movement isopposite compared to what is stored this will beindicated by message 52). Confirm message bysimultaneous pressing of keys UP + DOWN.

Menu 3: Valve functionM 1 2 3 4

Function of the positioner is set at:

„Normal“ if increasing input signal is to initiateincreasing output signal.

„Inverse“ if increasing input signal is to initiatedecreasing output signal.

8.2.2 Description of menusVarious parameters can be changed only viahandterminal, PC or I/A Series System and therespective software. See chapter 8.4.

In case operation via local keys (or hand terminal)is not possible check if write protection is set.

Change via WPP991 software (HART)or PC20 / IFDC software (HART / FOXCOM).

Menu 1: Actuator system, Mounting sideM 1 2 3 4

For an optimal actuator adaptation NAF-LinkIT has tobe configured whether it is a rotary or a strokeactuator.

The positioner of the rotary actuator can workdirectly with the linear position sensor value.

There are rotary actuator types opening in the leftdirection and others opening in the right direction.This also has to be signaled to NAF-LinkIT so that0% „Valve closed“ and 100% „Valve open“ arecorrectly assigned.

N.A. here (For stroke actuators mounted left of thespindle resp. directly mounted. The travel indicatorrotates clockwise during opening of the valve.)

N.A. here (For stroke actuators mounted right of thespindle. The travel indicator rotates counter-clockwise during opening of valve.)

For rotary actuators opening the valve during leftrotation. The travel indicator rotates during openingof the valve clockwise.

For rotary actuators opening the valve during rightrotation. The travel indicator rotates during openingof valve counter- clockwise.

Menu 2: AutostartM 1 2 3 4

To automatically adapt the positioner to the valve.Geometric data of the actuator is determined andoptimally assigned to control parameters.

½ ½ - - - hsalf1DELdnaM

- 1 - - - pusthgil1DEL

- - 1 - - pusthgil2DEL

- - - 1 - pusthgil3DEL

- - - - 1 pusthgil4DEL

½ - ½ - - hsalf2DELdnaM

2) Messages see chapter 10.4

- 1 - - - pusthgil1DEL

- - 1 - - pusthgil2DEL

- - - 1 - pusthgil3DEL

- - - - 1 pusthgil4DEL

- - - - - ffoerasDELllA

½ - - ½ - hsalf3DELdnaM

- 1 - - - pusthgil1DEL

- - - - 1 pusthgil4DEL

15

9.01

Fi 41.85(2)GB

Basics for setting limits and alarmsAllows for presetting different software generatedtight closing points and stroke limits explained in thefollowing pages. The following combinations arepossible:0% tight closing + upper stroke limit100% tight closing + lower stroke limit0% tight closing + 100% tight closinglower stroke limit + upper stroke limit

Note: Contrary to the mechanical impact in case ofpressure failure or of failure of the input signal (<3.6mA) the actuator spring will press the valve higherthan the limit value to the mechanical impact (failsafeposition of valve)!

Limit values:For all settings mentioned in this sub-section a valueof between 0% and 100%, max. 4 and 20 mA corres-ponding to the selected limit value is applied toanalog input 2) of the device. Normally, NAF-LinkIT isIN SERVICE and moves the valve position to therespective setpoint value. This enables the user tocheck the limit values with the valve.

Basic factory setting and disconnecting limitvalues:All of the limit values described here are factorydisconnected. Disconnection of the limit values canbe achieved through resetting of the configuration(see menu 9) resp. through entering an input value ofsmaller than 0.5 % resp. larger than 99.5 %.

Storing limit values:Activation and storing of limit values is done bypressing keys UP + DOWN simultaneously.

With valve characteristic line:In case a non-linear characteristic line was selectedin menu 4, the limit values are also related to thevalve position via the characteristic line. If the userknows exactly the position of the limit values withrespect to valve position prior to setting, he will beable to allocate these values exactly proportionatelyand percentage-wise to the valve position by meansof the input signal and the setting Linear Character-istic Line. This allocation is maintained independentof which characteristic line is selected later.

Checking limit values:The stroke limitation may be checked via messages12 and 13 (see chapter 10.4) during passing throughsetpoint range. These messages are solely for thepurpose to avoid an erroneous limitation. All otherlimit values can be checked solely via the valveposition at running actuator.

1) The support positions of the characteristic line can bechanged only via handterminal, PC or I/A Series System andsoftware. Not via the local keys.2) Not NAF-LinkIT with digital set value input! Only viacommunication.

Menu 4: Characteristic of setpointM 1 2 3 4

A relationship between the input signal and valveposition is set.

"Linear"

„Equal percentage“:Results in an equalpercentage characteristicline with a position ratioof 1:50 for a valve oflinear characteristic.

"Inverse equal perc.“:Results in an inverselyequal percentage charac-teristic line with a positionratio of 50:1 for a valveof linear characteristic.

„User defined characteristic“:A characteristic line1) entered via configurator( 2 to 22 supportingpoints) is activated.A linear characteristicline is factory set.

Menu 5: Limit and Alarms of valveM 1 2 3 4

- 1 - - - pusthgil1DEL

- - 1 - - pusthgil2DEL

½ - - - ½ hsalf4DELdnaM

- - - 1 - pusthgil3DEL

- - - - 1 pusthgil4DEL

½ ½ ½ - - hsalf2DELdna1DEL,M

20 40 60 80 1000 %

20

40

60

80

100

w

x

20 40 60 80 1000 %

20

40

60

80

100

w

x

20 40 60 80 1000 %

20

40

60

80

100

w

x

16

Menu 5-3 Setting 100% seal-tight point

If a 100% seal-tight point is pre-set and in case acertain set value is exceeded, NAF-LinkIT providesthat the pneumatic output presses the valve 100%into its seat with full force. As soon as the commandvalue is 0.5%* lower than this seal-tight value, theposition again follows the command value.This function makes sense for 3-way valves. Alsoboth seal-tight points can be used in order to tightlyclose the respective shut-off path during partialoperation.Procedure (for both seal-tight points):Move to desired position with input signal or in apressureless case enter respective input signal andstore value via the 2 keys (see above).Tight closing will follow immediately, and at runningactuator a distinct blowing-off at closing or blowing-ininto actuator at opening operating spring can beheard.

Menu 5-4 Setting opening limit

NAF-LinkIT provides that IN SERVICE the valveposition does not open any further than defined bythe opening limit. If the set value is exceeded,message 13 is produced.Procedure: Operate desired position via input signalresp. in case of pressureless condition enter therespective input signal and store value via 2 keys(see above).

Sealing tightly, inversely equal percentage

Opening limit xa, Closing limit x

z,

inversely equal percentage characteristic

Menu 5-1 Setting closing limit

The positioner provides that IN SERVICE the valveposition does not close any further than defined bythe closing limit. If the setpoint value is lower thanthis limit, message 12 is produced.

Procedure: Start desired position with input signalresp. if pressure-less, enter respective input signaland save value via keys (see above).

Menu 5-2 Setting 0% seal-tight point

If a 0% seal-tight point is given, in case the setpointis deviated lower, NAF-LinkIT provides the pneumaticoutput to press the valve into its seat with full force inorder to tightly seal valve. As soon as the commandvalue is 0.5%* higher than this seal-tight value, theposition again follows the command value.

* This is the „Seal-tight hysteresis“ factory set at 0.5%. Thevalue may be changed via communication.

Sealing tightly, linear charcteristic line

Opening limit xa, Closing limit x

z, linear

characteristic

- 1 - - - pusthgil1DEL

- - 1 - - pusthgil2DEL

- - - 1 - pusthgil3DEL

- - - 1 - pusthgil3DEL

20 40 60 80 1000 %

20

40

60

80

100

w

x

x

x

a

z

0 % w

x

0.5

%

0 % w

x

0.5

%

20 40 60 80 1000 %

20

40

60

80

100

w

x

x

x

a

z

17

9.01

Fi 41.85(2)GB

Split range, subdivision of input signal rangeExample: At low current, only the smaller valvepositions; from approx. 40 % the large valve isadded

Subdivision of input signal range, split range:If several positioners are operated at one current loopin sequence with the standard signal 4 to 20 mA,individual valve positions may be allocated to eachdevice, which also may overlap if necessary.

This function is useful if an additional control range isdemanded which cannot be covered by one valveonly. A valve of smaller nominal size can be appliedovertaking the smallest quantities; a parallelmounted valve of bigger nominal size takes on thelarger quantities.

Important: If the signal range of split range ischanged after setting the limit value, then thesevalues are maintained in relation to the valve positionand therefore don’t have to be re-set.

Menu 5-5 Allocate mechanical closing limit (0%)to input signal

(Split range zero)The presently existing input signal is allocated to themechanical impact at closed valve.

Procedure: Enter desired input signal for zero pointof the valve position and store via the 2 keys (seeabove). At running actuator this moves directly to 0% impact.

Menu 5-6 Allocate mechanical opening limit(100%) to input signal

(Split range span)The presently existing input signal is allocated to themechanical impact of the open valve.

Procedure: Enter desired input signal for the valvespan and save with the 2 keys (see above). Atrunning actuator this moves directly to 100 %impact.

- 1 - 1 - puthgil3DELdna1DEL

- - - 1 1 puthgil4DELdna3DEL

Definitions

Stroke, stroke range of the membrane actuator is defined for rotary actuators as angle, angle range0% position is the mechanical impact at actually closed valve (caution if using handwheel and mechanically

adjustable stroke limitation!)100% position is the mechanical impact at actually open valve.Closing limit is a lower limit set via software. In normal operation the valve will not close more than sethere.

Attention: In the event of failure of the auxiliary energy no controlling is possible, thereforethe

springs in the actuator will move the valve into safety position (for single-acting actuator).Normal operation (=IN SERVICE) means that the position is controlled to the 4-20 mA input signal.

JCE

JCE

40

60

80

100

x

4 20

40

60

80

100

x

mA mA

%

0

20

%

0

20

40 %

18

be selected in each of these and by simultaneouspressing of UP+ DOWN be entered in the positioncontroller as constant. Controller type is a PIcontroller.

The dead band prevents (at the expense of accuracy)that the valve in the controlled condition constantlymoves around the setpoint. This less harms themechanical parts of the actuator and in particular thevalve packing.

Selection of sub-menus:

Following selection of the sub-menu the codes forthe parameter values (table 4) can be selected bysimultaneously pressing UP+DOWN.

Table 4: Allocation of the parameter values tocoding:

Option „Two Limit signals“Menu 5-7 Set switch point for binary output 1(AB1)

The binary output 1 switches to high current belowthe limit value 1 in direction 0 % valve position (valveclosed). This enables to set a closing alarm to the additionalterminals, signal AB1 (see page 9).

Procedure: Operate desired position via input signalresp. in case of no pressure enter the respectiveinput signal and store value via the two keys (seeabove).

Menu 5-8 Set switch point for binary output 2(AB2)

The binary output 2 switches to high current abovethe limit value 2 in direction 100 % valve position(valve opened). This enables to set a opening alarmto the additional terminals, signal AB2 (see page 9).

Procedure: Operate desired position via input signalresp. in case of no pressure, enter the respectiveinput signal and store value via the two keys (seeabove).

Menu 6: Parameter for Position controllerAlong with the determination of the actuatorgeometry and control parameters the suitable settingparameters for the position controller are determinedvia function AUTOSTART in Menu 2. Assessment ofa control behavior generally is very subjective.Partially a quick response is requested withoutconsideration of the overshoot width, partially a verysmooth swinging is requested with minor overshoot.We basically recommend to first perform theexecution of the automatic setting via AUTOSTARTin Menu 2 in order to achieve a stable controlbehavior. Corrections may then be made from thedetermined values.In rare cases AUTOSTART cannot find the optimalsetting for the respective application. See „Remarksfor controller optimization“ following table 4.

For small actuators an improvement of the controlbehavior can be achieved also by increasing dampingat the pneumatic output (see page xx). A furtheroptimization may follow by repeating AUTOSTART.

M 1 2 3 4

Seven control parameters are combined in Menu 6each availing of a sub-menu. 15 different values may

- 1 1 - - puthgil2DELdna1DEL

- - 1 - 1 puthgil4DELdna2DEL

½ ½ - ½ - hsalf3DELdna1DEL,M

-retemaraPnoitangiseD

sievlaVgninepo

sievlaVgnisolc

tinU

etanoitroporPPKnoitacifilpma

puP nwodP -

emitnoitargetnItnatsnoc

punT nwodnT ces

emitgninoitisoP pu36T nwod36T ces

rofdnabdaeD.ffidlortnoc

PAG PAG napsfo%

4/1 - 4/3 - - nwodP:hsalf2DEL,M

4/1 4/3 4/3 - - puP:hsalf2DELdna1DEL,M

4/1 - - 4/3 - nwodnT:hsalf3DEL,M

4/1 4/3 - 4/3 punT:hsalf3DELdna1DEL,M

4/1 - - - 4/3 nwod36T:hsalf4DEL,M

4/1 4/3 - - 4/3 pu36T:hsalf4DELdna1DEL,M

4/1 - 4/3 4/3 - PAG:hsalf3DELdna2DEL,M

edoCsDEL4321

puPnwodP

punTnwodnT

)ces(

pu36Tnwod36T

)ces(

daeDdnab)%(

1 0001 00,2 00,1 01,0 00,0

2 0010 66,2 33,1 51,0 21,0

3 0011 05,3 57,1 52,0 61,0

4 0100 07,4 04,2 53,0 22,0

5 0101 03,6 02,3 05,0 03,0

6 0110 04,8 02,4 57,0 04,0

7 0111 02,11 06,5 51,1 35,0

8 1000 00,51 05,7 57,1 07,0

9 1001 00,02 00,01 06,2 49,0

01 1010 06,62 03,31 09,3 52,1

11 1011 05,53 08,71 09,5 76,1

21 1100 03,74 07,32 58,8 22,2

31 1101 01,36 06,13 03,31 69,2

41 1110 02,48 01,24 00,02 59,3

51 1111 02,211 -ffo- 00,03 03,5

19

9.01

Fi 41.85(2)GB

elapsed.Basically, the following is possible:a) to accept a remaining deviationb) to accept some response procedures (such asremaining in over-response for a short time, andremaining below setpoint and trailing).When deciding a), „Tn“ should become ineffective,table value (15). Compensating „P(kp)“ should beincreased until the setpoint jumps reach the setpointwithin a short period of time and without significantover-response (adapt to both movement directions).When deciding b) start as in a) above. Thereafter „Tn“is reswitched and decreased until the setpointdeviation has been re-controlled within a short periodof time and without long after-response (adapt in bothmovement directions).It is recommended to maintain the Tn’s for bothdirections about the same.If a post oscillation occurs after a setpoint jump, „Tn“is selected too small, possibly „P(kp)„ was selectedtoo large.The positioning time delay „T63“, also called valvedamping, does not have an effect during AUTO-START in Menu 2, however, setpoint jumps in Menu8 reach the position controller in a damped conditionwhich then is not easily stimulated to oscillation.This behavior is also true for the setpoint input.This enables setting the controller to higher „P(kp)„values without producing oscillations in the process.On one side this helps the position control to leveldisturbances due to friction, changes in load or airsupply pressure changes faster. On the other handit helps the superimposed valve control circuit thatneutral times in the valve control route do no havesuch a big effect (stability in valve control circuit).Changing valve dynamics during behavior B):Increase „Tn“ for both movement directions, possiblyturn- off and proceed as described in behavior A)alternative b).

Remarks to Controller TuningIf AUTOSTART does not find the optimum setting thefollowing may be the result:A) small response to setpoint, long positioning

time or long neutral timeB) continuous oscillation following setpoint jumpC) wide and high overshootFor the assessment of the control 12.5 % jumps inboth directions may be performed in Menu 8. Thevalve dynamics may be observed at the mechanicalindicator.Prior to changing parameters for valve dynamics anumber of items are to be checked - see below. Thepneumatic output can be approached directly withoutcontroller via Menu 7 and the valve movement maybe assessed.In case of behavior A) check:1.) Has the damping screw of the pneumaticamplifier been screwed in too far?Not applicable here, no damping screw.2.) Is the air pressure high enough to possibly over-come the actuator spring force and friction (sizing?)Remedy through increasing air pressure.3.) Is the actuator requiring an increased aircapacity for fast valve movement? Remedy through booster, see accessories.4.) Was AUTOSTART performed in Menu 2 and didmessages 8 resp. 9 occur (messages, see chapter10.4)? Remedy: „AUTOSTART“ in Menu 2 resp. observeinformation in table, chapter 10.3.5.) Has the parameter for the positioning time delaybeen set at a value too high?Remedy: decrease both parameters T63 in Menu 6.6.) Is valve packing too tight resulting in a very highfriction?7.) Is the supply air filter blocked?Remedy - see chapter 11.2.8.) Has the supply air been contaminated by smalloil drops resp. particles or are pneumatic partspossibly blocked?Remedy: exchange of pneumatic parts; possiblyuse a suitable air supply station.Behaviors B) and C) check:1.) Has a booster been switched?Remedy: possibly working without booster.2.) Has an air capacity throttle been opened too farin a small actuator?Remedy: see text beneath, damping screw, enforcethrottling.3.) Has the air supply pressure been set too high?Remedy: reduce pressure resp. install pressurereducer.Changing valve dynamics during behavior A):If valve has a high friction (for example, often thecase in small rotary actuators due to low air supplypressure or due to a valve seat packing which is tootight) then the valve position gets stuck after asetpoint jump and possibly is recontrolled via theresetting time Tn, possibly after quite some time has

20

Menu 7: Pneumatic output (for trouble-shooting)M 1 2 3 4

Serves to check the pneumatic parts of thepositioner by directly applying current to the IPmodule (no control; software limit values such as„stroke limits“ or „tight closing“ are ignored).

The current of the IP module is increased by about3% in 32 steps. By measuring the output pressuregenerally the following characteristic line of the IPmodule is achieved. The ramp also may be moresteep or flat depending on the air supply pressure.

If no reaction is shown, check:- does air supply exist? - is plug connected to IP module? If these items are okay, possibly the electronics or apneumatic part is defect. Exchange see chapter11.4.After leaving this menu (by pressing the M key or bysimultaneous pressing of UP and DOWN keys) theactual setpoint is automatically restarted.

Menu 8: Manual setting of valve positionM 1 2 3 4

For the purpose of checking the control reaction ofthe actuator to a setpoint jump can be observed viathe indicator. As far as the device is IN SERVICEthe UP or DOWN keys can initiate jumps of 12.5 %each. The starting value for Menu 8 is always thecurrent setpoint value.

If the control behavior is to be improved, this can bereached by performing a complete Autostart (seeMenu 2) or through manual tuning (see Menu 6).

After leaving this menu the existing setpoint value atthe input is automatically restarted.

Menu 9: Calibration functions (for workshop)M 1 2 3 4

Factory calibrations are carried out with sufficientaccuracy and remain unchanged during life time.However, an alignment may become necessary insome cases.

Menu 9-1 Reset Configuration

It is possible to restore the configuration existing attime of delivery via this function. This may becomenecessary if it is unclear what had been changed permenu or in the event that a positioner was taken fromone actuator and mounted to another actuator.Following this function the device is turned tocondition OUT OF SERVICE. This has to befollowed by Autostart for the purpose of adapting thecalibration to the actuator and to start IN SERVICE. The parameters of the factory setting are listed intable 3: Parameters/Functions (page 12).

Menu 9-2 Calibration of input current 1)

For adaptation to poorly calibrated systemcomponents the input current can be suited by theA/D alignment. It is recommended, however, to usefunction „Split range“.

Calibration of input current to 4 mA

The present input current value is taken over as „4mA“ (simultaneous pressing of UP+ DOWN).

Calibration of input current to 20 mA

The present input current value is taken over as „20mA“ (simultaneous pressing of UP+ DOWN).

Menu 9-3 Calibration of position sensor (anglecalibration)The angle pertaining to the vertical tap position(arrow mark) is factory calibrated for the position tap.If the position sensor is exchanged or if the electro-nics bar is exchanged the mechanical and electrictolerances have to be aligned through recalibration.

Calibration of position sensor value to –45°

The present position value is taken over as angle „–45°“ (simultaneous pressing of UP+ DOWN).

½ ½ - - ½ hsalf4DELdna1DEL,M

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 31

6

0

4

2

[bar

]

½ - ½ ½ - hsalf3DELdna2DEL,M

½ - ½ - ½ hsalf4DELdna2DEL,M

- - 1 - - pusthgil2DEL

- 1 - - - pusthgil1DEL

- 1 1 - - pusthgil2DELdna1DEL

- - - 1 - pusthgil3DEL

1) Only with NAF-LinkIT with analog input

21

4.00

Fi 41.85(1)GB

Calibration of position sensor value to +45°The present position value is taken over as angle„+45°“ (simultaneous pressing of UP+ DOWN).

Menu 9-4 Resetting of Configuration andCalibrationFor the exchange of the electronics the device mustbe signaled whether the pneumatic output is single-acting or double-acting so that the controller showsthe correct behavior during the next start-up.

Caution: The current calibration for inputs andoutputs, the angle calibration and all othercalibrations are reset to their factory definedcondition!

– for single-acting pneumatic output

The factory calibration for single-acting pneumaticoutput is restored (simultaneous pressing ofUP+DOWN).

– for double-acting output

The factory calibration for double-acting pneumaticoutput is restored (simultaneous pressing ofUP+DOWN).

Caution: Also the current calibration for inputs andoutputs as well as the angle calibration are returnedto the „ex factory“ defined condition!

Menu 9-5 Option position feedback–Calibration1)

In case option position feedback signal exists and ifoption board is exchanged, alignment of analogoutput to analog input is accomplished via analignment function. Without calibration the deviationis < 1%.

First, NAF-LinkIT is shut-off by returning to factorysetting in menu 9.1. This prevents the position to betransmitted to the analog output. Then NAF-LinkIT isconnected to a power source of exactly 20 mA,namely input parallel to output:

Terminal 11+ and 31+ to +20 mA andTerminal 12– and 32– to –20 mA.

The follwing is required for an accurate calibration:- a power source of exactly 20 mA- an accurately calibrated current input

Following the selection of the start-up menu 9 thefunction „Calibration of output current for positionfeedback“ is initiated.

Calibration of output current for positionfeedback

The function „output current alignment“ is started bysimultaneous pressing of keys UP+DOWN.

Thereby the output is trimmed via the input:if LED2 lights up, to the correct zero point andif LED3 lights up, to the correct span.

NAF-LinkIT returns to the menu selection and thealignment is concluded at the latest after 30 secondsif there is no message.

In case of message 3- the current at terminals 11+, 12- is too low or- the static current of the position response signal istoo high; exchange option board.

In case the alignment has not been concluded (LED2or LED3 stay „on“), possibly the wiring of input withoutput is incorrect, or the option board is defect.

Menu 10: Short AutostartM 1 2 3 4

For the automatic adaptation of the positioner to thegeometric data of the actuator (no change of controlparameters). Short Autostart is selected as soon asgreen LED1 and LED4 light up.

After start (simultaneous pressing of UP and DOWNkey) the run taking several minutes may be observedat green LEDs.

Direction of move, start and end positions are deter-mined by one or more passages of rotary angle.

Ramps are entered and the record control systemparameters (ratio position/actuator size) determined.

Direction of move, start and end positions are stored.Previous values are overwritten. NAF-LinkITcondition is again IN SERVICE.

Abort of automatic run by Reset (simultaneouspressing of M, DOWN and UP key) is possiblebefore LEDs are off. Values of previous Autostart arethen preserved.

- 1 - 1 - LED1 and LED3 light up

- 1 - - 1 LED1 and LED4 light up

- - - - 1 LED4 lights up

Ω - - Ω Ω M, LED3 and LED4 flash

- - 1 1 - LED2 and LED3 light up

- 1 - - 1 LED1 and LED4 light up

- - - - - All LEDs are off

- - 1 - - LED2 lights up

- 1 - - - LED1 lights up

1) Not with digital input

22

8.3 Configuration by means of hand-held terminal, PC or I/A Series System

See Master Instructions:HART by means of hand-held terminal MI EVE0105BHART by means of PC with ABO991 1) MI EVE0105CHART/FOXCOM by means of PC withPC20 / IFDC MI 020-495I/A Series System B 0193 VH

9 DECOMMISSIONINGBefore decommissioning the unit, disconnect thesupply air and the electrical input signal.

After disconnecting the electrical input signal the lastconfirmed configuration of the positioner is preservedin the memory.

23

4.00

Fi 41.85(1)GB

10 TROUBLE-SHOOTING GUIDEThe components of the positioner are under constantsurveillance by the installed micro controller. Errorsdetected are indicated in the LEDs.

Certain conditions (such as „Stroke limitation active“)are indicated in the LEDs as message.

10.1 Errors detected during initializationAfter start-up or reset several initialization phasesare passed through which are shown in the greenLEDs. If this phase stops an error was detected.If after renewed reset 1) the LED indicator stops aterror code the device is probably defect and shouldbe sent to the manufacturer for repair. Stating theerror code will be of help to the Repair and ServiceDept.

1 = LED constant light

LED indication for diagnosis, errorsThe following combinations are possible:After start / reset:(X X X X = error code)M 1 2 3 4

Device in normal operation:M 1 2 3 4

X=flashing

10.2 Errors detected during self-testDuring cyclical self-test certain components of NAF-LinkIT are under constant surveillance. At troubledetection in the electronics the red LED is initiated;output y1 becomes pressureless (‘fail safe position’).If after reset 1) the red LED shows the error again thedevice is probably defect and should be sent tomanufacturer for repair.

1 = LED constant light

1) Execute reset by simultaneous pressing M, UP, and DOWNkey or by turn-off and restart of input signal2) See page 30, jumper 2 wrong, or watchdog / ADC defect

LEDs

Descriptionred green

M 1 2 3 4

- 1 1 1 1 Micro controller functional test

- 1 1 1 - Micro controller RAM test

- 1 1 - 1 Micro controller settings test

- 1 1 - - Micro controller ADC test

- 1 - 1 1 Memory mapping

- 1 - 1 - Emulation test

- 1 - - 1 RAM test

- 1 - - - switch on EPROM

- - 1 1 1 Program data test

- - 1 1 - initialize data

- - 1 - 1 initialize stack

- - 1 - - AD-converter / watchdog test

- - - 1 1 initialize interfaces

- - - 1 - start operating system

- - - - 1 start controller

LEDs

Descriptionred green

M 1 2 3 4

1 - - - -

=>Red LED lights up const.RAM / EPROM fault

Actuate "Reset"; send device tomanufacturer if error appears again.

- X X X XError detected duringinitialization, see 10.1

1 - - - -Cyclic self-test detecterrors, see 10.2

- - - - - Diagnosis without LEDinform., see 10.3

3/4 X X X X Message, see 10.4

24

10.3 Diagnosis without LED codes

Fault Possible cause Solution

Positioner not operational usingkey pads

No input signal at 11+, 12- Connect input signal

No automatic power up reset Actuate reset with keys

A key got jammedRelease cover screws, check menu functions,retighten cover.

Failure in the positioner Send device to manufacturer

Autostart not completed (> 45min.) Actuator volume too large

Stop Autostart and carry out Short autostart,see chapter 8.2.2, Menu 10

Failure in the positioner, otherwise Message8, 9

Carry out Autostart again, see chapter 8.1 and8.2.2, menu 2 and 10

Send device to manufacturer

Actuator does not react to achange in the input signal

Autostart not carried out Carry out Autostart

Positioner is not in Normal operation modeSwitch NAF-LinkIT to Normal operation mode,see chapter 8.2.1,, or Short autostart orAutostart or using Configurator

Set value source incorrectly configured (tolocal or digital instead of analog)

Correct configuration via configurator resp.switch to analog source by correct set ofjumper position

Actuator does not attain theclosed or opened position

Autostart not carried out Carry out Autostart

Supply pressure too low Check supply air pressure

Travel limit is set, Message 12, 13Check settings, see chapter 8.2.1 and 8.2.2,menu 5

Angle position lnearization, position action orcharacteristic curve is set incorrectly (e.g.'Special' but values are missing)

Check settings, see chapter 8.2.1 and 8.2.2,menus 1, 3, 4

Unstable behaviour, positioncontrol circuit oscillates

Autostart incomplete, therefore, controlparameters not suitable

Carry out complete Autostart, see chapter 8.1and 8.2.2, menu 2

Small actuator volume at existing high aircapacity

Increase damping at pneumatic output, seechapter 8.2.2, Menu 8

Friction on valve packing too great Loosen packing gland slightly or replace

IP module or pneumatic amplifier defect Change module, see chapter 11.4

Actuator reads too sluggish Air capacity insufficient Attach booster

Damping set too highReduce damping at pneumatic output, seechapter 8.2.2, Menu 8

Positioning time T63 set too highReduce positioning time, see chapter 8.2.2Menu 6

No communication possible Voltage source instead of current source.Model codes -xHxx or -xExx

Change device

Current source instead of voltage source.Model code -xFxx

Change device

Source AC impedance too low Impedance >400 ohm, see chapter 13

Input voltage too low Eliminate voltage drop

Faulty protocol, communicator and device typenot match

Check configuration of device

Wrong electronics unit Change device

For tuning controller parameters see remarks on page 19.

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10.4 MessagesIn NAF-LinkIT with option'Built-in pressure sensors' flashing is superimposed by a flickering.

LEDs Description of message Remedy

M 1 2 3 4

3/4 1/4 - - -

Message 1: Writeprotection

Parameter and functions are write-protected Can be changed via Configurator, PC20/IFDCor WPP991

3/4 - 1/4 - -

Message 2: Parameter Invalid, undefined parameter values Reset of configuration to factory setting inMenu 9

3/4 1/4 1/4 - -

Message 3: Calibration Incomplete calibration or entering value resp.calibration value outside of permissibletolerance range

Repeat calibrations in Menu 9 resp. repeatentry in Menu 5

3/4 - - 1/4 -

Message 4: Inputcurrent outside ofoperating range

Check nameplate (see chapter 2) for correctversion

Echange device if necessary

Check jumper at lower side of electronics, sepage xx

Reconfigure jumpers, see page xx

with analog setpoint:option -H or option -E,<3,8 mA, > 22mA

Current source incorrectly set Set current source for input current to 3,8 - 22mA, if necessary check at measuring points23+, 23-. Caution: If operated at supplyterminal (instead of current source) NAF-LinkITmay be damaged; if necessary checkcalibration current input.

Configured value source is in digital (insteadof analog)

Reconfigure jumpers, se page xx.

with digital setpoint:option -F, < 8 mA

NAF-LinkIT is connected to a current source(instead of FBM43, digital)

Connect device to FBM43 or via resistor tovoltage supply

> 10 mA Jumper 1 is incorrectly set; deviceisconnected to FBM43 as current input (insteadof voltage input).

Reconfigure jumpers, see page xx.

3/4 1/4 - 1/4 -

Message 5: Positionsensor

Position sensor input recognizes error Check 3-pole plug at electronic board

Check cable to sensor

Check sensor (potentiometer; 5k +20% - 0%)

Position not within permissible rotation anglerange

Check feedback lever mounting (flat areapoints to arrow on housing)

During Autostart a change of the direction ofmovement was found

Acknowledge via keys UP+DOWN(simultaneously), then OK.

3/4 - 1/4 1/4 -

Message 6: I/Pconverter output

Connection I/P converter to electronic boardfaulty

Check 2-pole plug at electronic board

Check cable to I/P converter

Check I/P converter to detect short circuit orinterruption

3/4 1/4 1/4 1/4 -

Message 7: Air supply Detection:spring closes: w>2%, but position <1%spring opens: w<98%, but position >99%w/o spring: no actuator change in direction ofposition signal

Lead cable separated

Possible poor control parameter set

Pneumatic parts blocked

26

LEDs Description of message Remedy

M 1 2 3 4

3/4 - - - 1/4

Message 8:AUTOSTART defect

Air suply too low Check air supply

Coupling (rotary actuator) incorrectly linked (Rand L interchanged)

Check link, see chapetr 5Arrow on coupling points to arrow on housing

Pneumatic output to actuator closed or untight Check pneumatic connections, see chapters 4and 5

Mechanical stops not determinable Check link

No control parameter determinable since aircapacity is too high ( in general, oscillation invalve movement)

See chapter 8.2.2 Menu 8

Possibly incomprehensible configuration data Reset configuration, see Menu 9

3/4 1/4 - - 1/4

Message 9:AUTOSTART defect

Configuration to single-acting instead ofdouble-acting actuator

Initialize factory calibration for double-acting inMenu 9

3/4 - 1/4 - 1/4

Message 10: Optionboard

Wrong type Check if correct option board has beenchanged

Bad contact Connections to terminals interchanged

Check connections

Tighten electronics

Defect Exchange option board

3/4 1/4 1/4 - 1/4

Message 11: Remainingcontrol deviation

Actuator problems, for example friction Check actuator

Insufficient air supply Check air supply / air filter, see chapter 11.2

Insufficient parameters for position controls, forexample, amplification too small

Check control parameters, check pneumaticcomponents

IP module or pneumatic amplifier defect Check. Replace if necessary, see chapter 11.4

3/4 - - 1/4 1/4

Message 12:Configurated closinglimit has been reached1)

If this is desired, the message may beignored, of course

If not, the setting in menu 5 has to be checkedIf necessary reset configuration and renewconfiguration

3/4 1/4 - 1/4 1/4

Message 13:Configurated openinglimit has been reached1)

If this is desired, the message may beignored, of course

If not, the setting in menu 5 has to be checkedIf necessary reset configuration and renewconfiguration

3/4 - 1/4 1/4 1/4

Message 14:Maintenance required

Operating point of controller is outside ofpermissible tolerance

Pneumatic components have to be checkedand if necessary readjusted. Filters arepossibly blocked and have to be replaced

3/4 1/4 1/4 1/4 1/4

Message 15: Not defined

1) Message is shown on LEDs, independent of NAF-LinkIT version or set value source (analog / digital)

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11.3 Removal of the electronics unit*Pull off the travel indicator 12 .To remove the electronics unit 40, loosen the 7screws on the front.

Disconnect the plugs 41 and 42 from the board.Do not use tools to remove plugs, becausecomponents could be damaged. Tight-fitting plugscan be easily removed by tilting them diagonallyinward before pulling them off.

Connect the plugs 41 and 42 to the new electronicsunit 40 and attach the new unit by using the 7screws on the front (attention with the cables).

After replacing the electronics unit an anglecalibration should be carried out (see chapter 11.5)

11 MAINTENANCE11.1 GeneralNAF-LinkIT requires little maintenance. Whenreplacing components during repair work, the safetyrequirements on page xx must be observed!

11.2 Supply filter replacementAn obstructed supply filter can be replaced. Unscrewthe air supply fitting, remove the filter and exchangethe filter with a new one.

* On NAF-LinkIT with ‘pressure sensors’ option, seechapter 12.3 Pressure sensors

28

Replace the 4 O-rings between preamplifier 45 andthe base plate* and install the new preamplifier.

11.4.3 IP module replacementUnscrew the IP module 48 from the base plate andreplace with a new IP module. Replace the O-ringbetween the IP module and the base plate and installthe new IP module.

11.4.4 Feedback unit replacementFirst, remove the feedback lever or rotary adapterfrom the feedback shaft. Now remove the retainingring from the feedback shaft 9 (see page 6). Removescrews and pull out the complete unit 49 consistingof feedback shaft, gears and position sensor.

Insert the new feedback unit 49 and secure withscrews. Remember to replace the retaining ring onthe feedback shaft.

After replacing the feedback unit an angle calibration must be completed

(see chapter 11.5).

11.4 Replacement of mechanical andpneumatic units

First remove the electronics unit 40 . After theexchange always Autostart has to follow.

11.4.1 Amplifier replacementUnscrew the pneumatic amplifier 43 from the baseplate and replace the O-rings between the amplifierand base plate*.Use 3 O-rings for a single-acting amplifier and 5 O-rings for a double-acting amplifier. If replacing asingle-acting amplifier with a double acting, removethe sealing screw 44 before installation. Duringstart-up configuration has to be performed in Menu 9to „double-acting output“.

In the installation of a new amplifier, make sure thescrews are tightened for proper sealing.The damper screws have to be loosened until thescrew head is even with the amplifier surface ( = nodamping).

11.4.2 Preamplifier replacementUnscrew the preamplifier 45 from the base plate byremoving screws 46 and 47 .

* The base plate consists of a manifold and air ducts. O-ringsare required to guarantee sealing of the mounted elements.

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Now loosen the ACT and turn it with feedback shaftclockwise 90 degrees to the second set of mountingholes BB . See Figure.

Fig.: Position "+45“

Push down the ACT until the pins are centered in themounting holes BB and screws on to secure theACT to the feedback shaft. The position is nowlocked at "+45°“.

Acknowledge the second calibration position bytyping the value +45 when prompted by thecomputer.

For operation with local keys, the menu item 9 "Calibrate position measuring value to +45°“ is used.Confirm with simultaneously pressing the UP +DOWN keys.

Remove angle calibrator.

With FOXCOM use the IFDC to reinstall theconfiguration.

11.5 Angle calibrationWhen the electronic unit or the position feedbackunit is replaced, the position sensor requirescalibration. To accomplish the calibration, an anglecalibration tool ‘ACT’ (see Recommended SpareParts List) is required.

Fig.: Angle calibration tool (‘ACT’)

Rotate the feedback shaft 9 so that the flat on theshaft is perpendicular to the arrow 26 on thehousing. Attach the ACT to the top of the feedbackshaft. Rotate the feedback shaft counter-clockwiseuntil the two pins line up with the mounting holes AA on the back of the positioner, as shown below.

Fig.: Position "-45“

Push down the ACT until the pins are centered in themounting holes AA and screws on to secure theACT to the feedback shaft. The position is nowlocked at "–45°“.

Now the measurement value of the position sensormust be stored in NAF-LinkIT. To save the positionvalue for the HART and FOXCOM versions, the PC20/ IFDC software is required (not with the HT991). Follow the directions in the appropriate workshopfunction. Enter value „–45“ and confirm.

For operation with local keys, the menu item 9 „Calibrate position measuring value to -45°“ is used. Confirm with simultaneously pressing the UP +DOWN keys.

Center pinsClamping plate

A

A

-45˚

B

B

+45

30

Conversion to analog set value input is feasiblewithout commmunication. Jumper 1 into position 1-B, connect a current source 10 ... 20 mA, wait forinitialization and acknowledge message 4 via keysUP+DOWN (simultaneously).

Jumper 2Defines behavior of pneumatic output in case thewatchdog recognized an error in the electronics:

Position 2-A (fundamentally)Output y1 becomes depressurized

Position 2-BNot permitted; an error message is issued.

This restriction to „Output y1 becomesdepressurized“ increases the reliability: this assuresthat a defined value (failsafe position of the valve) isinitiated during failure of the electronics.

11.6 Jumper SettingsDepending on the version of NAF-LinkIT, the followingjumpers are located on the electronics unit(Electronics unit removed, see chapter 11.3).

Jumper 1(only for FOXCOM version)Hardware dependent conversion between FOXCOManalog and FOXCOM digital

Position 1-A Model Code NAF-LinkIT-xExxInput 11+ 12– is a current input 4-20 mA for analogsetpoint value (FOXCOM 4-20 mA)

Position 1-B Model Code NAF-LinkIT-xFxxInput 11+ 12– is a voltage input 13 - 48 V for digitalsetpoint value (FOXCOM)

(Other positions of the jumper are inadmissible andcan lead to damage of the device).

Attention: Changes to the jumper 1 must be carriedout by trained personnel only since otherwise

damage of the electronics cannot be ruled out. Inposition 1-A only a current signal, in case 1-B only a

respective voltage signal can be connected.

Additionally, conversion to the digital input signalrequires reconfiguration by means of PC20 or IFDCsoftware as per FOXCOM communication. Theimpedences for communication are to be consideredin any case, see chapter 13.

2-A

2-B

1-A

1-B

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12 OPTIONS12.1 Additional Inputs / OutputsGeneralFor a subsequent conversion to this option it has tobe checked whether the electronics 40 is preparedfor additional inputs and outputs.

Take current off NAF-LinkIT and turn-off supply air.Unscrew cover and remove electronics unit 40 (seechapter 11.3).

Attach option board 8 to connection ledge (observeorientation, see illustration). Refasten electronicsunit 40 .

After initialization acknowledge message 10 bysimultaneous pressing of keys UP + DOWN. If analignment becomes necessary, please see ch. 11.5.

Option „Position feedback and alarm“The analog output for position feedback indicatesthe valve position 0 - 100 % as current signal 4 to 20mA 1).The binary output for Alarm will be activated in thefollowing cases (see Messages, chapter 10.4):- Calibration error (for example due to break-up ofcalibration) Message 3- Output outside of limits determined during Autostart(Check mounting of feedback lever) Message 5- Circuit to potentiometer is disturbed (cableplugged?) Message 5- Circuit to IP module is disturbed (cable plugged?)Message 6- No actuator movement; Message 7- Remaining control deviation (packing is too tight?)message 11During disturbance of the electronics of NAF-LinkITthe Watchdog circuit is activated. The binary outputfor alarm signalizes this as „cable failure“.

12.3 „Built-in pressure sensors“The pressure sensors 50 are part of the electronics40 , therefore, the electronics has to be exchangedfor conversion to this option.

Disconnect electric power and air supply. Removecover and electronic unit 40 (see chapter 11.3)

Remove, if present, the M3 bolts with sealingwashers from both chimneys 52 . Press in a sealingplug 51 Part No. 534 346 013 into the top of eachchimney 52 until the collar makes contact.DO NOT GREASE!

To install an electronics unit with pressure sensors,c a r e f u l l y guide the tubes 50 of the pressuresensors vertically into the sealing plugs 51. Do nottwist or tilt the unit. Fasten screws on theelectronics unit.

Option „Two Limit signals“Both binary outputs AB1 resp. AB2 switch to highcurrent as soon as the valve position is below resp.exceeds the associated limit value. If the binaryoutputs AB1 resp. AB2 are to be inverted (highercurrent no alarm, lower current alarm), the associa-tion upper/ lower alarm have to be exchanged.

Option „Binary Inputs“The binary inputs EB1 and EB2 for two externalswitches resp. sensors initiate the following actions: 2)

An input not used is to be short-circuited (wire bridgebetween + and –).

Attention: Even if opening limit or closing limit areset: these actions are superimposed, and theactuator actually moves to 0 % resp. 100 %.

EB1 EB2 Action

closed closed IN SERVICE

open closed Position to be operated full power to 0%

closed open Position to be operated full power to 100%

open open Position to be maintained at final value

1)The direction of action of the position response message is set: valve position 0% = 4 mA; valve position 100% = 20 mA

2)Factory setting. Via communication actions may be turned off or used otherwise

32

13 SYSTEM CONFIGURATIONThe safety requirements on page xx must beobserved!

When using ‘Communication’ (an AC signal whichmodulates on the 4-20 mA signal), it must beensured that the connected outputs, buffer amplifierand barriers are compatible with the frequencyranges used. In addition to the load, the AC impe-dances requirements must be met. Therefore, it isrecommended that only the specified amplifier,barrier and configuration device is used.

To prevent crosstalk between lines and reducedisturbances through electromagnetic influences, itis recommended that twisted-pair shielded lines beused, with a diameter of AWG 22 - 14 and a max.capacity of 100 pF / m.

The line capacities and connected devices may notexceed the maximum values listed for a particularHART or FOXCOM protocol.

All components connected to the NAF-LinkIT in thehazardous location must be approved for use athazardous locations. Their limits may never beexceeded. These limits must also be observed whenconnecting other capacitance, inductive, voltage orcurrent sources.

The various NAF-LinkIT versions must be connectedas described in the Chapter numbers listed below.

(Here ‘Setpoint 4-20 mA’ or ‘digital’ means that thesetpoint value at the input of the NAF-LinkIT ispresent as either an analog current signal or as adigital signal.)

The following symbols are used:

HT991 Hand held terminal HT991 (intr.safe)

PC20/MOD PC with software PC20 and intr. safemodem MOD991

HT991 HT991 orPC20/MOD PC with PC20 and MOD991

PC20 PC with software PC20 and modem-PC10- PC10

Option -Hwith HART

communication

Option -E/Fwith FOXCOM

communication

Setpoint 4-20 mA,not intrinsically safe,see chapter 13.1.1

Setpoint 4-20 mA,not intrinsically safe,see chapter 13.2.1

Setpoint 4-20 mA,intrinsically safe,

see chapter 13.1.2

Setpoint 4-20 mA,intrinsically safe,

see chapter 13.2.2

Setpoint digital,not intrinsically safe,see chapter 13.3.1

Setpoint digital,intrinsically safe,

see chapter 13.3.2

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13.1 With HART CommunicationSetpoint value analogConfiguration with HART

The NAF-LinkIT is designed for HART-conformity(current sink with an impedance Zi of about 250 ohmand DC load of 600 ohm). The supply unit shouldfulfill the requirements for HART conformity (currentsource with an impedance Z1 of about 50 kohm at500 Hz and about 3 kohm at 10 kHz).For connection to one positioner an impedance Z1 of > 1.8 kohm in the frequency range from 500 Hz to10 kHz is sufficient.A total of all device and line capacitance must be <200 nF.

13.1.1 Non-intrinsically safe operationThe NAF-LinkIT can be connected directly to theoutput of the process control system or controller. Ifthe output impedance Z1 conforms to HART, a hand-held terminal or a PC-modem can be connected forcommunication at any place in the line.

Installation example: Direct Connection

If the output impedance Z1 is not sufficient Z1 shouldbe increased by insertion of an impedance-converter(resistor Rv, two-pole impedance, buffer amplifier,see 13.1.2). For communication the hand-heldterminal or the PC-mo+dem can be connected atany place following the converter.Configuration manual see chapter 8.4.

Measuring Communication SignalIf a reliable communication signal can not bereceived, it is advisable to check the level with anoscilloscope. The first data block always comesfrom the configurator and the second block is thereply from NAF-LinkIT.

LL: Line length to ConfiguratorFor HART max. 3000 m (10 000 ft.)

13.1.2 Intrinsically safe operationA suitable buffer amplifier with an intrinsically safeoutput and conforming to HART protocol must beconnected. For communication an intrinsically safeHT991 hand-held terminal can be connected at anylocation following the buffer amplifier. For the TV228,a PC modem MOD991 can be connected to thesockets at the front of the TV228.

Installation example: Insertion of the TV228Output intrinsically safe

If the output of the process control system orcontroller and the buffer amplifier input comply withHART, then the hand- held terminal or the PC-modem can be connected at any location before orafter the buffer amplifier. For the TV228, a PCmodem MOD991 can be connected to the socketsat the front of the TV228.

Installation example: Insertion of the TV228Output intrinsically safe

The following buffer amplifier/ barrier safety devicemay be used:

If a different intrinsically safe power supply unit thanthe TV228 buffer amplifier is used, the connection tothe SRD and the hand-held terminal or PC- modemmust be checked for conformance to intrinsic safetybefore commissioning.

HARTmeasured atconfigurator:

measured at NAF-LinkIT:

Configuratortransmits:

at least 350 mVpp at least 150 mVpp

NAF-LinkITtransmits:

at least 120 mVpp at least 300 mVpp

DeviceInput loadR2

Drives loadon output

Z2 Z3

TV228 100 ohm 650 ohm 350 ohm 400 ohm

NAF-LinkIT

NAF-LinkIT

NAF-LinkIT

34

13.2.2 Intrinsically safe operationIf the output impedance Z1 of the PCS or controller issufficiently high, a suitable buffer amplifier with anintrinsically safe and FOXCOM- conformed outputshould be connected after the controller. Forcommunication a PC with PC20 software can beconnected any place ahead of the buffer amplifierusing a PC10 modem.

Installation example: Insertion of the TV228Output intrinsically safe

The following buffer amplifier/ barrier safety devicemay be used:

The connection between NAF-LinkIT and the PCmodem must be checked for conformance to theintrinsic safety and FOXCOM compatibility beforecommissioning.

13.2 With FOXCOM CommunicationSetpoint value analog (4-20 mA)Configuration with FOXCOM

The NAF-LinkIT is designed for FOXCOM-conformity(current sink with an impedance Zi of approx. 500ohm and DC load of 600 ohm). The power supplyunit must be a power source with an impedance Z1of approx. 50 kohm at 500 Hz and approx. 3 kohm at10 kHz.A total of all device and line capacitance must be <200nF.

13.2.1 Non- intrinsically safe operationThe NAF-LinkIT is connected to the output of aprocess control system or controller. If the outputimpedance Z1 meets the requirements listed above,a PC with PC20 software can be connected at anyplace in the line for communication via a PC10modem.

Installation example: Direct Connection

If the output impedance Z1 is not sufficient, it shouldbe increased to the required value by inserting animpedance converter (resistor Rv, two-pole impedan-ce, buffer amplifier, see 13.2.2). For communicationthe hand-held terminal or the PC-modem can beconnected at any place downstream of this sub-assembly. Configuration manual see chapter 8.4.

Measuring Communication SignalIf a reliable communication signal can not bereceived, it is advisable to check the level with anoscilloscope. The first data block always comesfrom the configurator and the second block is thereply from the NAF-LinkIT.

LL: Line length to ConfiguratorFor FOXCOM max. 1800 m (6000 ft.)

FOXCOM (IT1)4-20 mA analog

measured atconfigurator:

measured at NAF-LinkIT:

Configuratortransmits:

at least 350 mVpp at least 75 mVpp

NAF-LinkITtransmits:

at least 75 mVpp at least 350 mVpp

DeviceInput loadR2

Drives loadon output

Z2 Z3

TV228 100 ohm 650 ohm 480 ohm 480 ohm

NAF-LinkIT

NAF-LinkIT

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13.3 With FOXCOM CommunicationSetpoint value digitalConfiguration with FOXCOM

The NAF-LinkIT is designed for FOXCOM- conformityThe power supply unit must have an impedance ofapprox 200 to 500 ohm.A total of all device and line capacitances must be <60 nF

13.3.1 Non- intrinsically safe operationNAF-LinkIT is connected to the output of the I/ASeries System for process control. It can beconfigured using the I/A series system with IFDCsoftware, or via PC with PC20 software connected atany place in the line using a PC10 modem.

Installation example: Direct Connection

Configuration manual see chapter 8.4.

Measuring Communication SignalIf a reliable communication signal can not bereceived, it is advisable to check the level with anoscilloscope. The first data block always comesfrom the configurator and the second block is thereply from the NAF-LinkIT.

LL: Line length to ConfiguratorFor FOXCOM IT2 max. 600 m (2000 ft.)

13.3.2 Intrinsically safe operationA suitable buffer amplifier with an intrinsically safeand FOXCOM-conform input and output must beconnected downstream. It can be configured usingthe I/A series system with IFDC software, or via PCwith PC20 software connected at any place in theline ahead of the buffer amplifier using a PC10modem.

Installation example: Insertion of a Zener barrierOutput intrinsically safe

The connection between NAF-LinkIT and the PCmodem must be checked for conformance to theintrinsic safety and FOXCOM compatibility beforecommissioning.

FOXCOMdigital (IT2)

measured atconfigurator:

measured at NAF-LinkIT:

Configuratortransmits:

at least 350 mVpp at least 75 mVpp

NAF-LinkITtransmits:

at least 75 mVpp at least 350 mVpp

NAF-LinkIT

NAF-LinkIT

36

14 Phase Diagrams Modes ofOperation

14.1 NAF-LinkIT with communication HART

14.2 NAF-LinkIT with communication FOXCOM

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Explanations to Phase diagramsThe respective oval shape indicates the mode. Mode of operation changes in direction of arrow ifdescribed conditions are met.

Key / menu „xxx“ : Operation via local keys

Command „yyy“ : Command via Communication

Power-Up: Return of the supply voltage or RESET

Power-up-action: A configurable 'switch' determi-ning what is to happen at power-up.

Example HART: In delivery condition the switch is'OUT OF SERVICE' since Autostart has not yetbeen executed and, therefore, no useful operationis possible. After the execution of Autostart theswitch changes automatically to 'IN SERVICE'. Ifthe power should be down and returns again, thepower- up action will bring NAF-LinkIT into mode 'INSERVICE'.

Writing permission in FOXCOMEven without write protection there are certainlimitations dependent on the respective mode:

Mode Who is allowed to write?

ONLINEFAILSAFE

I/A system - setpoint valueIFDC - no setpoint valueNeither one - configuration data

OFFLINENeither one - setpoint valueAll - configuration data

CALIBRATENeither one - setpoint valueNeither one - configuration data

LOCALI/A system - no setpoint valueIFDC - setpoint valueAll - configuration data

Key menu(Keyboard mode)

Neither one - setpoint valueNeither one - configuration data

38

15.3 Explosion protection(Only if ordered)Technical data for explosion protection see ProductSpecifications Sheet PSS EVE0105 A-(en).

For installations located in explosive atmospheres,all relevant national regulations and installationconditions must be observed, e.g. in the FederalRepublic of Germany ElexV and DIN VDE 0165.

Attention:When repairing explosion-protected equipment,observe the national regulations.

Repairs involving parts must be manufacturer’soriginal parts.

The following applies to the Federal Republic ofGermany: Repairs involving parts required forexplosion protection must either be carried out bythe manufacturer or by authorized personnel andconfirmed by certificate.

15.4 EMC and CEFor notes regarding Electromagnetic compatibilityEMC and CE labels see Product SpecificationsSheet PSS EVE0105 A-(en).

In order to ensure EMC protection, the following ismandatory:- the black electronic cover made of conductiveplastic has to be screwed to the housing- the sheet metal angle must have contact at thebottom of the electronics with the housing (springcog or EMC protection screws).

15 SAFETY REQUIREMENTS

15.1 Accident preventionThis device complies with regulations for theprevention of accidents Power-Driven Work Aids(VGB 5) of 1st October 1985.

In option „limit switch“ do not touch control vaneduring operation - danger of injuries!!

15.2 Electrical safetyThis instrument satisfies the conditions for safetyclass III, overvoltage category I according to EN61010-1 or IEC1010-1.

Any work on electrical parts must be done byqualified personnel if any supply is connected to theinstrument.

The instrument must be used for its designatedpurpose and connected in accordance with itsconnection diagram (see chapter 7 and 13).Locally applicable installation regulations forelectrical equipment must be observed, e.g. in theFederal Republic of Germany DIN VDE 0100 resp.DIN VDE 0800. The instrument contains no built-infuses.

The instrument must be operated with safety extralow voltage SELV or SELV-E.

Safety precautions taken in the instrument may berendered ineffectual if the instrument is not operatedin accordance with the Master Instructions.

Limitation of power supplies for fire protection mustbe observed due to EN 61010-1, appendix F or IEC1010-1.

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16 DIMENSIONS

All measures in mm

Subject to alterations - reprinting, copying and translation prohibited. Products and publications are normallyquoted here without reference to existing patents, registered utility models or trademarks. The lack of any suchreference does not justify the assumption that a product or symbol is free.

VEREENIGINGTel: 011 397 2833Fax: 011 397 4700

DURBANTel: 031 579 2593Fax: 031 579 2562

E-mail: sales@valve.co.zaExports: africaexports@valve.co.za