Manual

9
BRAY Series 70 Servo Pro
Operation and Maintenance Manual
E.Verify(oradjust)thetravelstoplimitsintheactuator
a. Brayactuatorsareshippedwiththetravelswitches
inthefactorydefaultposition-closetravellimit
setat0degreesandtheopentravellimitsetat
90degrees
b. Bray actuators equipped with Servo Pro have
the internal feedback potentiometer set in the
properpositiontomatchthetravelswitchfactory
default(fullycloseat0degreesandfullyopenat
90degrees)
c. Ifthetravelswitchsettingsaremovedfromthe
factory default position, the internal feedback
potentiometermustbeadjustedtomatchthenew
travelswitchsetting.Thisisdonebyperforming
acalibrationroutine.
d. For more details on setting the travel switch
settings, refer to the S70 Operation and
Maintenance Manual.
F. SelecttheTorqueSwitchEnableorDisable
a. If optional torque switches are installed in the
actuator, select Torque Switch Enable. The
optionaltorqueswitchesmustbeproperlysetand
wiredtotheServoPro.RefertotheS70Operation
and Maintenance Manual for more information.
b. Ifoptionaltorqueswitchesarenotinstalledinthe
actuator,selectTorqueSwitchDisable.
Warning
Before applying the appropriate electrical supply
voltage,verifythattheactuatorandServoProhavebeen
properlywiredtothefactorysuppliedwiringdiagram.
NOTICE
Topreventnoisecouplingbetweenconductors,power
lines and signal/communication lines should not be
routedtogetherinthesameconduitorcabletray. If
theymustcrosseachother,thenitshouldonlybedone
atrightangles
Recommendeddistancesbelowshouldbemaintained
betweenpowerandsignal/communicationconduit:
Metal Conduit:
Conductorcarryinglessthan20A=Atleast4in.
Conductorcarryingmorethan20Aupto100kVA=At
least 8 in.
Conductorcarryingmorethan100kVA=Atleast1.5ft
Non-Metallic Conduit:
Conductorcarryinglessthan20A=Atleast8in
Conductorcarryingmorethan20Aupto100kVA=At
least 2 ft
Conductorcarryingmorethan100kVA=Atleast3ft.
Please refer to NEC guidelines for proper wiring
techniquesinUSA.Othercountriesmustfollowalllocal
codesforsafetyrequirements.
Shielding
Signal/communicationlinesshouldbeshielded.Shield
must be grounded at one end only, preferably at the
controller.Groundingtheshieldatmorethanonelocation
canintroducenoiseinthecircuitrybyformingground
loops.
G. Applythecommandsignalinput
notice
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
a. Thecommandsignalmustbeconnectedtothe
properterminals.Refertothewiringdiagram.
b. Thecommandsignalinputmustmatchtherange
selectedwiththecongurationswitches.
c. Thecommandsignalmustbeavalidvalue(i.e.,
if4-20mADCisselected,thevaluemustbeno
lessthan4mAandnogreaterthan20mA.)
d. Note:agoodvaluetoselectforCalibrationwould
bemid-travel(i.e.12mADC)
Isolation Transformers
For circuits that are located in the proximity of
excessive electrical noise generators, isolation
transformers should beused to lter and prevent
noisefromenteringintothecircuitry.
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