PS Automation PSF402.2 - 5. Function; Actuator Functionality

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5
Installationposition
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Outdoorusage:
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Whenusingtheactuatorsinenvironmentswithhigh
temperaturefluctuationsorhighhumidity,werecommend
usingaheatingresistor.
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Figure2:Installationpositions
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5.Function
ThePSFactuatorsaredesignedaselectricvalveactuatorswithfailsafefunction.Theactuatorismountedontothe
valveviapillars.Dependingonthetypeofvalveused,mountingpillarsoraspecialvalvemountingbracketis
required.
BasedonabrushlessDCmotor(BLDC)thegeneratedtorqueistransmittedvia
amulti‐stagespurgearontoaspindle
nut.Thespindlenuttransmitstheinputtorqueintoanaxialthrustforceviaaspindle .Thelinearstrokeis
transmittedtothevalvespindlebyacouplingpiece.
Thestrokeismeasuredandcontrolledbyalinear12BitHallsensor.
Incaseofmainspowerloss,thestrokemovementisinOPENorCLOSEdirectionbyspringforce.
Electricalwiringisdonetoa terminalblockundertheactuatorcover.
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6.Manualoperation
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Figure3:Manualoperation
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Twopushbuttonsareinstalledto
drivetheactuatorincaseof
installationworksuchasmounting
ontoavalve,orsettingthelimit
switchespositions(see10.7).
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push
button