Blue Sea Systems 7611 User Manual

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

Blue Sea Systems 7611 Specifications

General

Terminal Type	Stud
Nominal Voltage DC	12V
Terminal Stud Size	3/8 inch
Type	Automatic Charging Relay
Poles	1
Housing Material	Plastic
Standards	CE

Summary

Installation Instructions

Mounting

Install the unit in a dry, protected location away from battery banks to avoid corrosion.

Electrical Connections

Guidance on wiring the ACR, emphasizing caution and proper wire sizing for safety.

Voltage Sensing

The ACR automatically senses charging sources available on either battery bank.

Minimum Connections for Operation

Essential wiring steps for basic ACR functionality, including terminal connections.

Auxiliary Battery Priority

Optional feature to allow auxiliary battery to remain paralleled down to lower voltage.

Remote Indicator Lamp

Connect an external LED to mimic the ACR's 'COMBINED' status indicator.

Wire Size and Fuse Ratings

Dimension Drawings