Manual

15
BRAY Series 70 Servo Pro
Operation and Maintenance Manual
caution
Donotconnectanyhighvoltagepowertothehand-
wheelswitchterminalsasdamagecouldresult.
Engagingthehandwheelpreventstheactuatormotor
frombecomingenergized,butitdoesnotremoveelectric
powerfromtheServoPro.Exercisecautiontoavoid
personnelinjuryordamagetoproperty.
5.1.5 traVel limit sWitcH terminals
TheServoProacceptssignalsfromtravellimitswitches
installedintheactuatorthatindicatewhenthefullyclosed
andfullyopenpositionsarereached.Whenatravellimit
is reached, theServo Prowill notpower the actuator
motoranyfartherinthatdirection.
Thewiringtothetravellimitswitchterminalsisconnected
at the factory and should not require any adjustment
bythecustomer.Ifaeldrepairisrequired,refertothe
wiringdiagramtomakesuretheopenlimitswitchiswired
betweentheOPEN LIMITterminalandtheCOMMON
terminal,andthecloselimitswitchiswiredbetweenthe
CLOSE LIMITterminalandtheCOMMON terminal.
Normal operation requires a closed contact between
OPEN LIMIT and COMMON,andbetweenCLOSE LIMIT
and COMMON.
The travel switches are used during the calibration
routinetoindicatethefullyclosedandfullyopenactuator
positions.
Refertotheactuatormanualforinformationonadjusting
thetravellimitswitches.
notice
A travel switch that is broken, improperly wired,
improperlyadjustedormissingfromtheactuatorcan
resultinanopencontactwhichwillbeinterpretedby
theServoProastheactuatorreachingthetravellimit.
Donotactivatebothtravelswitchessimultaneouslyas
thiswillcreateanerrorcondition.Theactuatorcannot
befullyopenandfullyclosedatthesametime.
caution
Donotconnectanyhighvoltagepowertothetravel
limitswitchterminalsasdamagecouldresult.
5.1.6 torQue limit sWitcH terminals
TheServoProacceptssignalsfromoptionaltorquelimit
switchesinstalledintheactuatorthatindicatewhenan
over-torqueconditionexistswhilethemotorismoving
intheclosedoropendirection.Whenatorquelimitis
reached,theServoProwillnotpowertheactuatormotor
anyfartherinthatdirection.
Thewiringtothetorquelimitswitchterminalsisconnected
atthefactoryandshouldnotrequireanyadjustmentbythe
customer.Torqueswitchescannotbeaddedtoactuators
intheeldbecausefactorycalibrationisrequired.
Normaloperationrequiresaclosedcontactbetweenthe
TORQUE LIMIT OPEN and COMMON,andbetweenthe
TORQUE LIMIT CLOSE and COMMON.
!
!