Installation Instructions
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.
Marine Electrical Products
BatteryLink® ACR
Automatic Charging Relay
with Auxiliary Battery Priority
Electrical Connections
• The wiring diagrams illustrated on the back page represent common installations and are not meant to
be a guide for wiring a specific vehicle.
PN 7611
Features
• 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.
• 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
Use the Wire Size and Fuse Ratings chart on page 2 to select the appropriate wire sizes to prevent
overheating the ACR.
• 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
Voltage Sensing
•
The 7611 ACR will sense charging sources available on either battery bank.
• Easy to install
Minimum connections for operation:
• Connect one battery bank to stud terminal A.
• Connect the other battery bank to stud terminal B.
• Integrated LED indicates ACR status (LED is ON when batteries are combined)
• Optional remote LED output for indication of ACR status
• Connect the quick connect terminal marked Ground to the DC system ground through
a ten to fifteen amp in-line fuse to prevent fault currents from flowing in this wire.
LED Status Chart
LED
ON
Relay
Closed
Open
Status
Optional connections:
1. Auxiliary Battery Priority
Batteries Combined
Batteries Isolated
OFF
The 7611 ACR can be configured 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 configured 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.
Specifications
Continuous Rating
Intermittent Rating (5 min.)
Maximum Cable Size
Terminal Stud Size
12V DC
120A
210A
1/0 AWG
3/8"-16 (M10) 3/8"-16 (M10)
140 in-lbs
24V DC
120A
210A
1/0 AWG
To enable temporary voltage override:
•
Connect a wire from the quick connect terminal marked Aux. Battery Priority through an
appropriately sized in-line fuse (1A to 10A) 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.
Maximum Torque
Male Quick Connect Terminals 1/4″ x .032″
140 in-lbs
1/4″ x .032″
Relay Contact Position
To enable permanent voltage override:
Combine
Combine
Open Low
(30 sec.)
(2 min.)
(30 sec.)
13.6V DC
13.0 V DC
12.75V DC
16.0V DC
27.2V DC
26.0V DC
25.5V DC
32.0V DC
•
Connect a wire from the quick connect terminal marked Aux. Battery Priority through an
appropriately sized in-line fuse (1A to 10A) to a +12/24V DC source
Open-Over Voltage Lockout
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).
Auxiliary Battery Priority
Optional Feature
To connect a remote LED indicator:
Open Low
(30 sec.)
12.25V DC
24.5V DC
•
•
Connect the red wire of the LED to a 12/24V positive source through a 2A inline fuse.
Connect the yellow wire of the LED to the quick connect terminal marked LED.
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
Open/Close Cycling
• If your electrical system is configured 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.
Guarantee
Blue Sea Systems stands behind its products for
as long as you own them. Find detailed
For customer service, call 800-222-7617.
980011740 Rev.002
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