Mounting
• To avoid corrosion to connecting wires and terminals, mount in a dry and protected location
if possible. Avoid locations directly above the battery banks.
Electrical Connections
• The wiring diagrams illustrated on the back page represent common installations and are not meant to
beaguideforwiringaspecicvehicle.
• The 7611 ACR is not intended to carry starting currents. Use a battery switching system with a
combine batteries/parallel function if batteries may need to be combined for emergency starting.
Caution: Disconnect battery connections before beginning the installation.
Use the Wire Size and Fuse Ratings chart on page 2 to select the appropriate wire sizes to prevent
overheating the ACR.
Voltage Sensing
• The 7611 ACR will sense charging sources available on either battery bank.
Minimum connections for operation:
• Connect one battery bank to stud terminal A.
• Connect the other battery bank to stud terminal B.
• Connect the quick connect terminal marked Ground to the DC system ground through
aoneampin-linefusetopreventfaultcurrentsfromowinginthiswire.
Optional connections:
1. Auxiliary Battery Priority
The7611ACRcanbeconguredtoallowbatteriestoremain“paralleled”downtoadecreased
“OpenLow”voltageof12.25/24.5VDCifdesired.Enablethisfeatureifyouneedtoaccesssomeofyour
enginestartbattery’sstoredenergyforaccessoryloads.Thefeaturecanbeconguredfortemporary
use while the ignition is on, or permanently. Wiring permanently allows this device to also be used as a
LowVoltageDisconnect(LVD)topreventaccidentalandpotentiallydamagingover-dischargeof
accessory batteries by disconnecting loads.
To enable temporary voltage override:
• Connect a wire from the quick connect terminal marked Aux. Battery Priority through an
appropriatelysizedin-linefuse(onetotenamp)toaterminalorwirerunningfromtheignitionswitch
thatis+12/24VDCwhiletheignitionison,andat0VDCwhenignitionisoff.
To enable permanent voltage override:
• Connect a wire from the quick connect terminal marked Aux. Battery Priority through an
appropriatelysizedin-linefuse(onetotenamp)toa+12/24VDCsource
2. Remote indicator lamp –mimics“COMBINED”LEDonunit.
Appropriate12/24VLEDsincludeBlueSeaSystemsPNs8033(amber),8171(red),or8172(green).
To connect a remote LED indicator:
• ConnecttheredwireoftheLEDtoa12/24Vpositivesourcethroughaonetotwoampinlinefuse.
• ConnecttheyellowwireoftheLEDtothequickconnectterminalmarkedLED.
Open/Close Cycling
• Ifyourelectricalsystemisconguredwithachargingsourcethatcannotsupplythefullloadcurrent
beingdrawnfromthereceivingbatteries,anopen/closecyclingprocesscanoccur.Ifthiscycling
continues, the second battery bank could eventually discharge even though a charge source
is present.
BatteryLink®ACR
Automatic Charging Relay
with Auxiliary Battery Priority
980011740Rev.003
Features
• Automatically combines batteries during charging and isolates batteries when discharging
• OptionalAuxiliaryBatteryPriorityconnectionsharesthealternatorchargewiththeAuxiliarybattery
longer allowing the use of the auxiliary loads for an extended period of time when the engine is running
•120AContinuousratingtosupporthighoutputalternators
•Onetenthofthevoltagedropofabatteryisolatorresultsinmorefullychargedbatteries
• Dual sensing to manage multiple charge sources
• Robust, fully sealed assembly for reliability in environments with vibration and moisture
• Clip-on cover insulates terminal connections
•Easytoinstall
•IntegratedLEDindicatesACRstatus(LEDisONwhenbatteriesarecombined)
•OptionalremoteLEDoutputforindicationofACRstatus
Specications 12VDC 24VDC
ContinuousRating 120A 120A
IntermittentRating(5min.) 210A 210A
MaximumCableSize 1/0AWG 1/0AWG
TerminalStudSize 3/8"-16(M10) 3/8"-16(M10)
MaximumTorque 140in-lbs 140in-lbs
MaleQuickConnectTerminals 1/4″x.032″ 1/4″x.032″
Relay Contact Position
Combine (30sec.) 13.6VDC 27.2VDC
Combine (2min.) 13.0VDC 26.0VDC
OpenLow (30sec.) 12.75VDC 25.5VDC
Open-OverVoltageLockout 16.0VDC 32.0VDC
Auxiliary Battery Priority (optionalfeature)
OpenLow (30sec.) 12.25VDC 24.5VDC
Regulatory
Emarked for Ignition Protection, Meets ISO 8846,
UL 1500 and SAE J1171 external ignition
protection requirements
Rated IP67----protected against immersion up to
1meterfor30minutes
Guarantee
Blue Sea Systems stands behind its products for
as long as you own them. Find detailed
information at www.bluesea.com/about.
Forcustomerservice,call800-222-7617.
PN 7611
MarineElectricalProd
ucts Installation Instructions
LED Status Chart
LED Relay Status
ON Closed Batteries Combined
OFF Open BatteriesIsolated
