
1.Clutch(notalldriveshavethisconnection).
2.Motor/drive(notallcompatiblevariantsareshowninthe
illustrationabove).
Clutchconnectioncolors
ColorDescription
ARed
Clutch+ve
BBlue
Clutch-ve
Motorpoweroutput
ACU–200ACU-400
15A(maximumcontinuousoutput)30A(maximumcontinuousoutput)
Note:Themotoroutputhasfullshort-circuitandover-current
protection.Shouldeitherofthemotoroutputconnectionsbe
shortedtoground,thereshouldbenopermanentdamageto
theautopilot.
Clutchpoweroutput
ACU–200ACU-400
Upto2Acontinuousat12Von12V
and24Vsystems.
•Upto4Acontinuousat12Von
12Vsystems.
•Upto4Acontinuousat24Von
24Vsystems.
•Upto4Acontinuousat12Von
24Vsystems.
Note:Theuseofaclutchdrivewillhaveanimpactonthe
amountofelectricalcurrentavailabletotheSeaTalk
ng
system.
On24Vsystems,thereisan8A/12Vmaximumsupply
fortheSeaT alk
ng
systemandclutchdrivecombined.For
example,iftheclutchrequires4A,theSeaTalk
ng
supplycan
onlydeliver4AtotherestoftheSeaT alk
ng
system.
Note:TheclutchoutputonallACUvariantshasfull
short-circuitandover-currentprotection.Shouldeitherofthe
clutchoutputconnectionsbeshortedtoground,thereshould
benopermanentdamagetotheautopilot.
Clutchvoltageswitch
Ifthedrivehasaseparateclutchconnection,youmustensure
thattheclutchvoltageswitchontheACUissetcorrectlytosuit
theconnecteddrive.
Important:T oavoidpotentialdamagetoequipment,ensure
voltageselectorswitchissettothecorrectsetting.The
clutchvoltagemaybedifferentfromthatofthedriveitself,for
exampletherangeofboth12Vand24VRaymarinedrives
allhavea12Vclutch.Ifindoubt,consultyourlocaldealer.
Driveandbypassvalveconnection-ACU-300
ConstantRunningPump(solenoid)drivesconnecttothe
connectionpaneloftheACU-300.
Solenoiddriveconnection
GRO UND
P OWER
S OLENOID S OLENOID
A B
12 V
24 V
1
2
3
4
5
D12684-1
1.Electronicsteering/joglever(ifrequired).
2.Back-feedprotectiondiodes(ifusinganelectronicsteering
orjoglever).
3.Driveout.
4.Drivereturn.
5.Solenoidvalves(withdiodesacrossspoolvalves).
Note:Ifanelectronicsteeringorjogleverisused,tdiodes
(suggestedtype:1N4004)in-linewiththesolenoidoutputsto
preventback-feedingtheACU.
Bypassvalveconnectionandvoltageswitch
Somedrivesfeatureanelectrically-operatedbypassvalveto
minimizetheeffectonthesteeringwhentheautopilotisin
standby.
Ifthedrivehasaseparatebypassvalve,connectittotheBypass
connectionontheACU,ensuringthatthevoltageselection
switchissetcorrectlyto12V/24Vasappropriate.
Important:T oavoidpotentialdamagetoequipment,ensure
voltageselectorswitchissettothecorrectsetting.The
bypassvalvevoltagemaybedifferentfromthatofthedrive
itself.Ifindoubt,consultthemanufacturerofthedriveunit.
Bypassvalveconnectioncolors
ColorDescription
ARedBypassvalve+ve
BBlueBypassvalve-ve
26
EvolutionEV-1,ACU-100,ACU-200,ACU-300,ACU-400
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