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Blue Sea Systems 7611 Installation Instructions

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2

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

 beaguideforwiringaspecicvehicle.

• 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

aoneampin-linefusetopreventfaultcurrentsfromowinginthiswire.

Optional connections:

1. Auxiliary Battery Priority

 The7611ACRcanbeconguredtoallowbatteriestoremain“paralleled”downtoadecreased

 “OpenLow”voltageof12.25/24.5VDCifdesired.Enablethisfeatureifyouneedtoaccesssomeofyour

 enginestartbattery’sstoredenergyforaccessoryloads.Thefeaturecanbeconguredfortemporary

use while the ignition is on, or permanently. Wiring permanently allows this device to also be used as a

 LowVoltageDisconnect(LVD)topreventaccidentalandpotentiallydamagingover-dischargeof

accessory batteries by disconnecting loads.

To enable temporary voltage override:

• Connect a wire from the quick connect terminal marked Aux. Battery Priority through an

  appropriatelysizedin-linefuse(onetotenamp)toaterminalorwirerunningfromtheignitionswitch

  thatis+12/24VDCwhiletheignitionison,andat0VDCwhenignitionisoff.

To enable permanent voltage override:

• Connect a wire from the quick connect terminal marked Aux. Battery Priority through an

  appropriatelysizedin-linefuse(onetotenamp)toa+12/24VDCsource

2. Remote indicator lamp –mimics“COMBINED”LEDonunit.

 Appropriate12/24VLEDsincludeBlueSeaSystemsPNs8033(amber),8171(red),or8172(green).

To connect a remote LED indicator:

 • ConnecttheredwireoftheLEDtoa12/24Vpositivesourcethroughaonetotwoampinlinefuse.

 • ConnecttheyellowwireoftheLEDtothequickconnectterminalmarkedLED.

Open/Close Cycling

• Ifyourelectricalsystemisconguredwithachargingsourcethatcannotsupplythefullloadcurrent

 beingdrawnfromthereceivingbatteries,anopen/closecyclingprocesscanoccur.Ifthiscycling

continues, the second battery bank could eventually discharge even though a charge source

is present.

BatteryLink

®

ACR

Automatic Charging Relay

with Auxiliary Battery Priority

980011740Rev.003

Features

• Automatically combines batteries during charging and isolates batteries when discharging

• OptionalAuxiliaryBatteryPriorityconnectionsharesthealternatorchargewiththeAuxiliarybattery

longer allowing the use of the auxiliary loads for an extended period of time when the engine is running

•120AContinuousratingtosupporthighoutputalternators

•Onetenthofthevoltagedropofabatteryisolatorresultsinmorefullychargedbatteries

• 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

•Easytoinstall

•IntegratedLEDindicatesACRstatus(LEDisONwhenbatteriesarecombined)

•OptionalremoteLEDoutputforindicationofACRstatus

Specications 12VDC 24VDC 

ContinuousRating 120A 120A

IntermittentRating(5min.) 210A 210A

MaximumCableSize 1/0AWG 1/0AWG

TerminalStudSize 3/8"-16(M10) 3/8"-16(M10)

MaximumTorque  140in-lbs 140in-lbs

MaleQuickConnectTerminals 1/4″x.032″ 1/4″x.032″

Relay Contact Position

Combine (30sec.) 13.6VDC 27.2VDC 

Combine (2min.) 13.0VDC 26.0VDC

OpenLow (30sec.) 12.75VDC 25.5VDC

Open-OverVoltageLockout 16.0VDC 32.0VDC

Auxiliary Battery Priority (optionalfeature)

OpenLow (30sec.) 12.25VDC 24.5VDC

Regulatory

E marked for Ignition Protection, Meets ISO 8846,

UL 1500 and SAE J1171 external ignition

protection requirements

Rated IP67----protected against immersion up to

1meterfor30minutes

Guarantee

Blue Sea Systems stands behind its products for

as long as you own them. Find detailed

information at www.bluesea.com/about.

Forcustomerservice,call800-222-7617.

PN 7611

MarineElectricalProd

ucts

Installation Instructions

LED Status Chart

LED Relay Status

ON Closed Batteries Combined

OFF Open BatteriesIsolated