Manual

13
BRAY Series 70 Servo Pro
Operation and Maintenance Manual
5.0 HardWare descriPtion
Themicroprocessor-controlledServoProenhancesthe
operationoftheS70actuatorbyprovidingfullpositioning
control,supplyinganactuatorpositionfeedbacksignal,
respondingtovariousswitchinputconditions,performing
self-diagnosticsandindicatingoperationalstatus.
TheServoPromicroprocessoreliminates theneedto
adjustpotentiometers during calibration. Calibration is
performedbysimplypressingabutton.TheServoPro
will automatically seek the fullyclosed andfully open
travellimitsandstorethevaluesinnon-volatilememory.
5.1 terminal block connections
notice
TheServoProwillacceptwiresizesrangingfrom14
to24AWG.
18AWGwireisrecommended.
Largerwirethan14AWGcoulddamagetheterminal
blockconnectionsandshouldnotbeused.
Each terminal connection on the Servo Pro is clearly
labeledonthetopsilkscreentosimplifywiringasshown
inFigures2and3.
5.1.1 PoWer inPut terminals
TheelectricpowersuppliedtotheServoProdrivesthe
actuatormotor,allthecircuitryinsidethemodule,plus
allthedevicesconnectedtothemodulesuchasthelimit
switches,torqueswitches,handwheelswitch,controlbox,
outputsignalandanti-condensationheater.
notice
The electric power supplied to the Servo Pro must
matchtheratingshownontheServoPronameplate.
Eachdifferentrating(100VAC,220VACor24VAC)
requiresadifferentServoProunit.
The Servo Pro must be installed in an actuator that
matchestheratingshownontheServoProname-plate.
Forinstance,a110VACServoPromustbeinstalledin
a110VACactuator.
caution
The terminal block connections designed for high
voltageareplacedbehindasolidlinelabeledHIGH
VOLTAGE on the silk screen. Dangerous high
voltage(110VACorhigher)canbepresentonanyof
theseconductorswhentheServoProisoperating.
Usecautiontoavoidinjurytopersonnelordamage
toequipment.
Donotconnectany110VACor220VACconductorsto
anyterminalblocksoutsidethislabeledarea.
TheServoProisdesignedtoacceptasinglephaseAC
linevoltageofthepropervalue.
The Live conductor should be connected to the Live
terminal.The Neutral conductor should be connected
totheNeutralterminal.
5.1.2 command signal inPut terminals
Applythecommandsignalinput
notice
Note: Ensure that your controller is able to provide
the proper command signal range given the
following input impedance values:
4-20mA 200Ohm
0-5VDC >10MOhm
0-10VDC >10MOhm
The Servo Pro accepts a command signal from the
processcontrollerthatrepresentsthedesiredposition
oftheactuator.Thecustomerwiresthecommandsignal
toanoutputfromtheirprocesscontroller.
Thecommandsignalhaspolaritythatmustbeobserved.
Connectthepositiveconductorofthecommandsignalto
theINPUT(+)terminal.Connectthenegativeconductor
ofthecommandsignaltotheINPUT(-)terminal.
Thecommandsignalhasfourdifferentrangesselectable
throughcongurationswitches.
A potentiometer 10k ohm (or larger) can be used to
generateacommandsignal.Wireonexedterminalof
thepottotheterminallabeled+5Volts.Wirethewiperof
thepottotheterminallabeledINPUT(+).Wiretheother
xedterminalofthepottotheterminallabeledINPUT(-).
Setthecommandsignalto0-5VDCusingConguration
!