Blue Sea Systems Stereo System m ACR 7601 User Manual

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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