Fairchild PAX1 Electric Linear Actuator User manual

Brand: Fairchild

Model: PAX1 Electric Linear Actuator

Type: User manual

Fairchild PAX1 Electric Linear Actuator is a flexible low voltage DC powered linear actuator featuring a 25 mm maximum thrust rod stroke moving at speeds up to 60 mm/min and a maximum thrust of 2890 N all in a flameproof enclosure. The unit is inherently lock in last place as the thrust rod maintains its position upon loss of electrical power. The actuator can be actuated open loop using two optically isolated switch closure inputs (Up and Down) to move the actuators thrust rod. The actuator will continue to move the thrust rod in response to the inputs until either of the adjustable stroke limits are reached.



RotorkFairch ildPAX1LinearActuator

User’sManual

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ProductOverview

ThePAX1isaflexiblelowvoltageDCpoweredlinear

actuatorfeaturinga25mmmaximumthrustrod

strokemovingatspeedsupto60mm/minanda

maximumthrustof2890Nallinaflameproof

enclosure.Theunitisinherentlylockinlastplaceas

thethrustrodmaintains

itspositionuponlossof

electricalpower.

Theactuatorcanbeactuatedopenloopusingtwo

opticallyisolatedswitchclosureinputs(UpandDown)

tomovetheactuatorsthrustrod.Theactuatorwill

continuetomovethethrustrodinresponsetothe

inputsuntileitheroftheadjustablestroke

limitsare

reached.

Theactuatorcanbecontrolledwithanisolated4‐20

mAanaloginputtoproportionallypositionthethrust

rodanywherewithinits25mmstroke.Thereisa1‐5

vdcnon‐isolatedcontrolinputaswell.Inanalog

controlmode,theunitisfailfreezeuponloss

of

eithercontrolsignals.

TheactuatorfeaturesUPandDOWNpushbuttonsunderthecovertofacilitatecommissioningandto

permitlocalcontroloftheactuator.Thereisan8mm(5/16”)femalehexmotordriveinterfaceunderthe

covertoallowmanualactuatormovement.

Theactuatorincludestwofullyadjustable

SPDTalarmrelays(oneHighandoneLow)providingalarm

functionwhentheactuator’sthrustrodreachescriticalpositionswithinitsstroke.Therelaysare

magneticallylatchedsothealarmswitchstatesaremaintainedwhenthepowerisdisconnected.This

allowsaccuratealarmfunctiononsystemsthatremovepowerfromthe

actuatorbetweenadjustmentsto

conservepowerasistypicallydoneinsolarpoweredinstallations.

ThePAX1offersanoptionalisolated4‐20mAfeedbackoutput.Thisfeedbackfeatureisfunctionalfor

boththepulsecontrolandanalogcontrolconfigurations.Theunitmustbepoweredtofacilitatethe

feedbackoutputfunction.





GeneralInformation

TheLinearElectricActuatordescribedinthisdocumenthasbeendesignedandmanufacturedwithstate

ofthearttechnology.Allcomponentsaresubjecttostringentqualityandenvironmentalrequirements

duringmanufacture.OurqualitysystemsarecertifiedISO9001.

Thisuser’smanualcontainsimportantinformationthatenablesacompetentusertoinstall,

operateand

maintainthislinearelectricactuator.Theinstallation,operationandmaintenanceofthisactuatorina

hazardousareamustbecarriedoutbyanappropriatelytrainedandqualifiedpersonandinaccordance

withallrelevantcodesofpracticefortheparticularHazardousAreaClassification.

Warning

 Installationmustbecarriedoutbyqualifiedpersonnelinaccordancewithallnationalandlocal

codesandordinances.

 ShockHazard.Multiplepowersourcespossible.Disconnectallpowersourcesbeforeservicing.

Seriousinjuryordeathcouldresult.

 Readandunderstandallinstructionscarefullybeforestartinginstallation.Savethisdocument

for

futureuse.Failuretoreadandunderstandtheseinstructionscouldresultinimproperoperationof

thedeviceleadingtoequipmentdamag e,seriousinjury,ordeath.



HazardousAreaRatings(Flameproof)

FactoryMutual

ClassIDivisionIGroupsABCDT5/T6

ClassII,IIIDivisionI,GroupsEFGT5/T6

Class1,Zone1,AExdbIIC,T5/T6Gb

Zone21,AExtbIIICT85ºC/100ºCDb

T6[T85ºC]:Ta=‐40ºCto+65ºC,

T5[T100ºC]:Ta=‐40ºCto+70ºC

Type4X/6P,IP66/68



HazardousAreaCo nditions ofuse

 HazardouslocationswiringmustcomplywithANSI/NFPA70(NEC®).

 Wiringmustberated110

Corhigher.

 Explosionproofcertifiedsealsarerequiredwithin18”forGroupsA,B,CandDinstallationsor

within2”forGroupIICinstallations.

 Useadampclothwhencleaningtheenclosuretopreventthebuildupofelectrostaticcharge.

 ThePAX1Actuatorincludesflamepathjoints.Consult

FairchildInc.ifrepairoftheflamepath

jointsarenecessary.

 Suitablyratedconduitsealsmustbeusedfortheconditionsofusesuchasdusttightsealsfor

ClassII&III,GroupsE,F,Gorwaterproofsealstopreventwateringress.

 TomaintainType4X

andIP66ratingwheninstallingthreadedconduit,usePTFEthreadsealant

tapeaccordingtoinstructions.



Installat ion

ThePAX1canbemountedinanypositionwithoutaffectingitsoperation.Itcanbemountedtoaflat

surfaceusingthemountingholesontheactuator.Fordetails,seeFigure1.“PAX1ExteriorDimensions”

above.

ConduitSeal:ThePAX1isratedforlimitedsubmergedoperationbuttheuserisresponsible

forensuring

watercannotenterthePAX1enclosurethroughtheconduitconnectionsandconduitport.Ensurethe

conduitinstallationiswatertightatelevationsthatmaybesubmergedbelowwater.Whereconduitis

pronetocollectinternalcondensation,appropriateconduittraps,drainsandsealsmustbeemployedto

preventcondensation

fromcollectinginsidethePAX1enclosure.

Wiring

ThePAX1canbecontrolledwiththreedifferentcontrolinterfaces.Thewiringdiagramsbelowshowthe

connectionsrequiredtooperatetheunitbasedonthecontroltypeaswellasconnectionstoother

featuressuchaspositionfeedbackandalarmswitches.

Theterminalblockscanaccommodatewiresizeupto1.5

mm(14ga.).Duetosafetyrequirements,wire

enteringTB2andTB3terminalblocks(alarmrelays)requireferrules(supplied)toprovideproper

insulationforthehighvoltageACconnections.



PowerSupplySizing

For12vdcoperation,therecommendedpowersupplyshouldhave2ampcapacity.

For24vdcoperation,

therecommendedpowersupplyshouldhave1ampcapacity.





0 10 20 30

Loop Supply Voltage (Volts)

Loop Supply Current (mA)

PAX1 Linear Actuator

Pulse Control Loop Supply Current

0.2

0.4

0.6

0.8

1.0

1.2

10 15 20 25 30

Supply Voltage (Volts)

Supply Current (Amp)

PAX1 Linear Actuator

Current Consumption Characteristics

Crimpferruleontowire,thenclampitintheterminalblock.

ElectricalConnections

Electrically isolated pulse input control using an external loop supply



Non isolated pulse input control using common power supply for pulse control loop power





Lp Rtn

MTR ENAB

V -

mA +

V +

mA -

PWR

LOOP SUPPLY

Figure 1.

SW2IsolationSwitch

setto“Isolate”

FEEDBACK

Switch set to

PULSE

Internal connection of

NO/ISOLATE switch.

Set to ISOLATE

Lp Pwr

MTR ENAB

V -

mA +

V +

mA -

PWR

SW2 Isolation Switch

set to “No”

Figure 2.

FEEDBACK

Switch set to

PULSE

Internal connection of

NO/ISOLATE switch.

Set to NO

4-20 mA analog control



1-5 vdc analog control



MTR ENAB

V -

mA +

V +

mA -

PWR

Figure 3.

FEEDBACK

20 mA

CONTROLLER

Set switch to

ANALOG

SW1

Set switch to 4-20 mA

Lp Pwr

MTR ENAB

V -

mA +

V +

mA -

PWR

Figure 4.

FEEDBACK

5vdc

CONTROLLER

Set switch to

ANALOG

SW1

Set switch to 1-5 vdc

Lp Pwr

Power and Feedback Connections



Power and Feedback Connections



MTR ENAB

V -

mA +

V +

mA -

PWR

Figure 5.

FEEDBACK

POWER SUPPLY

MILLIAMMETER

LOOP SUPPLY

Closed switch

disables motor

Lp Pwr

External loop supply for Isolated Feedback Loop

MTR ENAB

V -

mA +

V +

mA -

PWR

Figure 6.

FEEDBACK

POWER SUPPLY

MILLIAMMETER

Non Isolated Feedback using Power

Supply for feedback loop power

Lp Pwr



Alarm Switch Connections



UserInterface

SetupSwitch

EightpositionrotarySETUPswitch,

Configurationdipswitches,

SW1selectseither1‐5vdcor4‐20

mAforanalogcontrolinput

SW2,Isolate:ThePulsecontrol

inputsareisolatedfrom theDC

powersupplyproviding powertothe

unitandmustbepoweredfrom

a

separateexternalpowersource.

SW2,NO:ThePulsecontrolinput

circuitisconnectedtotheDCpower

supplyproviding powertotheunit.

Pushbuttonswitches,

UP;Movestheactuatorsthrustrodout

oftheunit.

DN;Movestheactuatorsthrustrodinto

theunit.

SET;Usedinconjunctionwith

therotary

SETUPswitchtosetendtravellimitsandalarmpointsandanalogfeedbackcalibration.



ALARM SW

Alarm Indicator

Power Supply

Figure 7.

ALARM SW

SETUPswitch

SW1

SW2

Figure8.

LEDIndicators

PWR:Green,Supplyvoltageisbetween11and30vdc.Red,Voltageislessthan11vdcorgreater

than28VDC.

LIMITHI:Green,Hilimitnotreached,thrustrodwillmoveinbothdirections.Red,HiLimitreached,

thrustrodwillmovedownonly.

LIMITLOGreen,Lolimit

notreached,thrustrodwillmoveinbothdirections.Red,LoLimitreached,

thrustrodwillmoveuponly.

ALARMHI:Green,HiAlarmnotreached,HiAlarmrelaynotenergized.Red,HiAlarmreache d,Hi

Alarmrelayisenergized.NOcontactareclosed.

ALARMLO:Green,LoAlarmnot

reached,LoAlarmrelaynotenergized.Red,LoAlarmreached,Lo

Alarmrelayisenergized,NOcontactareclosed.

Speedpotentiometer

20turn.Adjustsactuatorspeedfrom1.2mm/minto60mm/min

Dampingpotentiometer 

1turn.Adjustsstartandstoprampspeedrate.



Commissioning

Warning

 Note:multiplepowersourcespossible.Donotremovecoverinthefieldwithoutfirstremovingall

powerfromtheunit.

 Commissioningmustbedoneinasafeareabeforeinstallinginahazardousarea.

 Obtainspecialworkpermitbeforeremovingcoverandmakingpoweredadjustmentsinthefield.





1. Settingendtravellimits

1.1. DisconnectAnalogInputsfrom4‐20and1‐5vdcinputterminals.

1.2. Turnonpowertotheunit.

1.3. PositiontheSETUPSWITCHtotheTRAVELLIMITLOsetting.

1.4. UsingtheUPandDNbu ttonsunderthecover,positionthethrustrodto

thedesiredmost

retractedposition.

1.5. PresstheSETbuttonandwaitfortheLimitLoLEDtoturnfromGreenthenRedandbackto

Greentosetthelowtravel limit.

1.6. MovetheSETUPSWITCHtotheTRAVELLIMITHIsetting.

1.7. UsingtheUPandDN

buttonsunderthecover,positionthethrustrodto thedesiredmost

extendedposition.

1.8. PresstheSETbuttonandwaitfortheLimitHiLEDtoturnfromGreenthenRedandbackto

Greentosetthehightravellimit.

1.9. PositiontheSETUPswitchtotheOPERATE/PULSEor

OPERATE/ANALOGfornormaloperation.

1.10. WhenintheOPERATE/PULSEmode,theactuatorwillrespondtotheUpandDnexternalpulse

controlinputsandwillstopwhenthethrustrodreacheseitherendtravellimit.TheLIMITLO

andLIMITHILEDswillchangefromGreentoRedwhenthe

limitisreached.TheinternalUP

andDNpushbuttonswillrespondlikewise.

1.11. WhenintheTRAVELLIMIT/LOorHI,mode,theUpan dDnexternalpulsecontrolinputsare

disabled.TheinternalUPandDNpushbuttonswillbeactiveandwillignorethepreviousend

oftravellimitssothatnewlimitsmaybesetbeyondthepreviouslysetlimits.TheLIMITLOand

LIMITHILEDswillcontinuetooperatefromthepreviouslysetlimitsuntilnewlimitsareset.



2. SettingAnalogControlCurrent



2.1. Connecta4‐20mAsignalsourcetothe

mAinputterminals.

2.2. Turnonpowertotheunit.

2.3. SetSW1to4‐20mA.

2.4. PositionthePositiontheSETUPSWITCHtotheTRAVELLIMITLOsetting.

2.5. UsingtheUPandDNbu ttonsunderthecover,positionthethrustrodtothedesiredmost

retractedposition.

2.6. ApplythedesiredcontrolcurrenttothemAinputterminalsforthisthrustrodposition.

2.7. PresstheSETbuttonandwaitfortheLimitLoLEDtoturnfromGreenthenRedandbackto

Greentosetthelowtravel limitandcorrespondingcontrolcurrent.

2.8. Movethe

SETUPSWITCHtotheTRAVELLIMITHIsetting.

2.9. UsingtheUPandDNbu ttonsunderthecover,positionthethrustrodtothedesiredmost

extendedposition.

2.10. ApplythedesiredcontrolcurrenttothemAinputterminalsforthisthrustrodposition.

2.11. PresstheSETbuttonand

waitfortheLimitLoLEDtoturnfromGreenthenRedandbackto

Greentosetthehightravellimitandcorrespondingcontrolcurrent.

2.12. PositiontheSETUPswitchtotheOPERATE/AN ALOGtooperatetheactuatorfromthemAinput

terminals.

3. SettingAnalogControlVoltage



3.1. Connect

a1‐5vdcsignalsourcetotheVinputterminals.

3.2. Turnonpowertotheunit.

3.3. SetSW1to1‐5V.

3.4. PositionthePositiontheSETUPSWITCHtotheTRAVELLIMITLOsetting.

3.5. UsingtheUPandDNbu ttonsunderthecover,positionthethrust

rodtothedesiredmost

retractedposition.

3.6. ApplythedesiredcontrolvoltagetotheVinputterminalsforthisthrustrodposition.

3.7. PresstheSETbuttonandwaitfortheLimitLoLEDtoturnfromGreenthenRedandbackto

Greentosetthelowtravel 

limitandcorrespondingcontrolcurrent.

3.8. MovetheSETUPSWITCHtotheTRAVELLIMITHIsetting.

3.9. UsingtheUPandDNbu ttonsunderthecover,positionthethrustrodtothedesiredmost

extendedposition.

3.10. ApplythedesiredcontrolvoltagetotheVinputterminalsforthisthrustrod

position.

3.11. PresstheSETbuttonandwaitfortheLimitLoLEDtoturnfromGreenthenRedandbackto

Greentosetthehightravellimitandcorrespondingcontrolcurrent.

3.12. PositiontheSETUPswitchtotheOPERATE/AN ALOGtooperatetheactuatorfromtheVinput

terminals.

4. AlarmSwitches

4.1. PositiontheSETUPSWITCHtotheALARMSWITCHLOsetting.

4.2. UsingtheUPandDNbu ttons,positionthethrustrodtothedesiredLOALARMposition.

4.3. PresstheSETbuttonandwaitfortheALARMLOLEDtoturnfromGreenthenRedandback

to

GreentosettheALARMSWITCHLOposition.

4.4. TurntheSETUPSWITCHtotheALARMSWITCHHIsetting.

4.5. UsingtheUPandDNbu ttons,positionthethrustrodtothedesiredHIALARMposition.

4.6. PresstheSETbuttonandwaitfortheALARMHILEDto

turnfromGreenthenRedandback to

GreentosetALARMSWITCHHIposition.

4.7. PositiontheSETUPSWITCHtotheOPERATEPULSEorANALOGmodefornormaloperation.



5. SettingFeedbackOutput

5.1. MovetheSETUPSWITCHtotheFEEDBACKLOsetting.

5.2. UsingtheUPandDNbu tton,andmonitoringtheAnalogFeedbackcurrentonthemilliammeter,

adjusttheoutputcurrentto

thedesiredvalue(4‐12mA)fortheLOLimitposition.

5.3. PresstheSETbuttonandwaitfortheFEEDBACKLOLEDtoturnfromGreenthenRedandback

toGreentosettheFEEDBACKLOoutputcurrent.

5.4. MovetheSETUPSWITCHtotheFEEDBACKHIsetting.

5.5.

UsingtheUPandDNbutton,andmonitoringtheAnalogFeedbackcurrentonth emilliammeter,

adjusttheoutputcurrenttothedesiredvalue(12‐20mA)fortheHILimitposition.

5.6. PresstheSETbuttonandwaitfortheFEEDBACKLOLEDtoturnfromGreenthenRedand

back

toGreentosettheFEEDBACKHIoutputcurrent.

5.7. PositiontheSETUPSWITCHtotheOPERATEPULSEorANALOGmodefornormaloperation.



6. Manualadjustment ofthr u st rodposition.

Warning

 Manualadjustmentmustonlybedonewhenpowerisremovedfromtheunit.

 Note:multiplepowersourcespossible.Donotremovecoverinthefieldwithoutfirstremovingall

powerfromtheunit.



6.1. Thethrustrodoftheactuatormaybemanuallyadjustedviaan8mm(5/16”)femalehex

interfacelocatedthroughthetopoftheunitwiththecoverremoved.

6.2. Turntheadjustmentclockwisetoextendthethrustrodoutoftheunitandcounterclockwiseto

retractthethrust

rodintotheunit.

6.3. Takecarewhenmanuallyadjustingtheactuatorasyoucandamagetheunitifyouforcethe

thrustrodintoitsmechanicalstops.



7. MotorEnable



7.1. Themotorenableinput(Terminal6ontheterminalblocks)isprovidedforadditionalcontrolof

theactuator.

Fornormaloperation,noconnectionisrequiredforthisinput.Groundingthis

inputdisablesthemotorandtheactuatorwillignoreanycommandtomoveth ethrustrod

includingcommandsfromtheinternalpushbuttons.

PAX1ActuatorInstallationDimensions

Figure9.

Maintenance



PeriodiclubricationofThrustRod

After20,000operatingcycles,re‐lubricatetheactuatorthrustrod.

Makesureitissafetodisabletheactuatorinthesystem.MovethesetupknobtotheOperatePulse

modeandusingtheUPandDNpushbuttons,positionthethrustrodtoa

positionthatremovesany

thrustonthethrustrod.Toexposethethrustrodremovethefourboltsthatattachestheactuator

housingtotheactuateddevice.RemovetheThrustRodCapexposingtheThrustRod.Withthesetup

knobtotheOperatePulsemodeandpressingtheJogUpbutton,

extendthethrustrodtoitsmost

extendedopposition.ApplyDowCorningG‐nlubricanttotheexposedthrustrodthread.UsingtheJog

Dnbutton,retractthethrustrodtoitsmostretractedposition.Re‐installthethrustrodcapandthe

PAX1actuatortotheactuateddevice.



Spec ifications

ElectricalSupply:

PowerSupplyVoltage 11‐30VDC

PowerConsumption 18wattsmax,<1wattstandby



ActuationElectrical,Analog

ActuationControl 4‐20mA,1500Vopticallyisolatedfrompowersupply,Switchforc ommonpower

supply.1‐5VDCnonisolated,50KΩimpedance

ActuationSupply 11‐30VDC(LoopSupply)



ActuationElectrical,Pulse

Actuation

Control SwitchClosureSinking,(1)increase,(1)decrease

ActuationCurrent 10mAsink,opticallyisolated1500V,Switchforcommonpowersupply

ActuationSupply 4VDCminimum,30VDCmaximum



Monitor

AlarmSwitches Customeruse,(2)SPDTeachswitch,1A250VAC,(Maglatchingrelay)

PositionFeedback Optional,Isolated4‐20mA,11‐30VDCloop

supply



ElectricalDesignLimits

SupplyVoltageLimits 11VDCmin,30VDCmax

AnaloginputLimits 3.5mAmin,21mAmax,100mAw/odamage

AnalogOutputLimits 3.5mAmin,21mAmax

Externalloopsupplylimits 4VDCmin,30VDCmax

AlarmSwitches  1A250VACSPDT



Customerinterface:

ElectricalConnections Screwterminalblockunder

cover,14‐30AWG

Actuatorspeed Multi‐turnpot,1.2–60mm/min*

Caution

 Shuttingoffactuatoranddisconnectingassociatedequipmentcancausedangeroussystem

conditionstoexist.EnsuretheSystemisproperlypreparedformaintenancetobeperformedon

theactuator.

Limitadjustments Pushbuttonswitchtoacceptcurrentthrustrodpositionfor(2)EndofTravel

limit,&(2)AlarmSwitch,andAnalogFeedbackCalibration

SetupSwitch  8positionrotaryswitch.

Damping  Single‐turnpot,8:1turndown

IsolationSwitch PulseControlLoop–Isolat ed/commontopowersupply



ActuatorPerformance:

Maximum

Stroke 25mm

MaximumForce 2890N(650lbf)

MaxLinearSpeed 60mm/min 

Actuatorshaft M10x1.5mmscrewthd.

PowerUpInitialization AnalogControl:2.1sec.

Time  PulseControl:0.9sec.

Feedbackoutput:0.9sec.



EnvironmentalRatings

Oper.Temp.Range‐40ºCto+80ºC,<50%DutyCycle,<10

mincycleperiod(MotorActuated)

‐40ºCto+70ºC,ContinuousDuty(MotorActuated)

IngressProtection IP66&IP68/NEMA4X

NEMA  Type4X&6P



*Actuationspeedmayneedtobelimitedtoachieveratedthrustatlowersupplyvoltages.



OM‐100PAX1ARev_12/16

Fairchild PAX1 Electric Linear Actuator User manual

Fairchild PAX1 Electric Linear Actuator User manual

Fairchild PAX1 Electric Linear Actuator User manual

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