Installation Instructions
m-ACR Automatic Charging Relay 7601
Features and Specifications for
m-ACR 7601 and Mini Add-A-Battery 7649
m-ACR 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.
m-ACR Automatic Charging Relay
Features
• Automatically combines batteries during charging, isolates batteries when discharging
• The Start Isolation option protects electronics from voltage sags and spikes during engine cranking
• Supports alternators up to 65 Amps
m-ACR 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 vessel.
• The 7601 m-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.
• Ignition protected—safe for installation aboard gasoline powered boats
• For 12 or 24 volt systems
• Dual Sensing—senses charging on either battery bank
m-ACR Voltage Sensing
LED Status Chart
LED
Solid ON
•
The 7601 m-ACR will sense a charge being applied to either battery bank.
BATTERY STATUS
Combined
REASON
Charging
Use the wire sizing chart below to select the appropriate wire sizes to prevent overheating the m-ACR.
Single Flash (15 sec.)
Double Flash
Triple Flash
Isolated
Standby
Start Isolation wire is energized
One or both batteries are below
9.5V (12V System) 19V (24V System)
Wire Size and Fuse Rating Chart
Isolated (Start Isolation)
Isolated (Under Voltage Lockout)
Charging Amps
Min. Wire Size* (AWG)
Fuse Rating
40A-50A
Min. Wire Size* (Metric)
6 mm²
≤30
≤50
≤65
#10
#8
60A-65A
10 mm²
16 mm²
#6
90A-100A
Specifications
Intermittent Rating (5 min.)
Continuous Rating
115A
65A
* Larger wire sizes may be required to minimize voltage drop in long wire runs.
Operating Current (Combine)
Operating Current (Open)
Cable Size (to meet current ratings)
Maximum Cable Size
Terminal Stud Size
Maximum Torque
90mA
15mA
6 AWG (16mm²)
1/0 AWG (50mm²)
1/4"-20
m-ACR minimum connections for operation:
•
•
•
Connect one battery bank positive to one of the 1/4”-20 studs.
Connect the other battery bank positive to the other 1/4”-20 stud.
Both positive connections should be made through appropriately sized circuit protection to meet
ABYC recommendations. See “Wire Size and Fuse Rating” chart, above, for suggested fuse ratings.
Connect the quick connect terminal marked GND (ground) to the DC system ground through
a 10A in-line fuse to prevent fault currents from flowing in this wire.
60 in-lbs (6.8 Nm)
•
Relay Contact Position
12V DC
13.6V DC
13.0 V DC
12.35V DC
12.75V DC
16.0V DC
9.5V DC
24V DC
Combine
(30 sec.)
(2 min.)
27.2V DC
26.0V DC
24.7V DC
25.5V DC
--
m-ACR optional connection:
To enable start isolation:
Open Low
(10 sec.)
(30 sec.)
•
Connect a wire from the quick connect terminal marked SI (starting isolation) to the terminal or wire
running from the start key switch to the starter solenoid (see back for wiring diagram). This connection
can be made at the start key switch or at the starter solenoid, but must be to the line that is positive only
when cranking. Connection to a line that is positive while the engine is normally running will prevent the
charging relay from working properly.
Over Voltage Lockout
Under Voltage Lockout
Under Voltage Reset
19.0V DC
20.0V DC
10.0V DC
Regulatory
E marked for Ignition Protection, Meets ISO 8846 and SAE J1171 external ignition protection requirements
Rated IP67----temporary immersion up to 1 meter for 30 minutes
Installation Instructions
m-Series, Dual Circuit Plus™ Battery Switch 6011 (Included with 7649 Mini Add-A-Battery)
m-Series, Dual Circuit Plus™ Battery Switch 6011 (Included with 7649 Mini Add-A-Battery)
Features
• Switches two battery banks simultaneously with one ON/OFF switch while maintaining battery bank
isolation, minimizing the risk of a dead start battery
•
•
•
•
•
Turn all loads off before turning the battery switch to OFF.
Do not switch to OFF while the engine is running.
Mount the battery switch in an easily accessible location close to the batteries.
Attach one 4/0 AWG cable per terminal to meet ratings.
Terminals must be attached under nut and lock washer. Torque to 120 in-lb (13.56 Nm)
• The COMBINE BATTERIES function parallels two battery banks in the event of a low battery
• Ignition protected—safe for installation aboard gasoline powered boats
Specifications
Cranking Rating (10 sec.)
Cranking Rating (1 min.)
Intermittent Rating (5 min.)
Continuous Rating
1,000 Amps
650 Amps
450 Amps
300 Amps
Maximum Voltage
32 Volts
Cable Size to Meet Ratings
Terminal Stud Size
Maximum Torque
4/0 AWG (120mm²)
3/8"-16 (M10)
120 in-lbs (13.56 Nm)
Regulatory
E marked for ignition protection, meets UL1500 and SAE J1171 external ignition
protection requirements
Rated IP66---protected against powerful water jets
980014350 Rev.001
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