Blue Sea Systems Blue Sea ACR Manual: Wiring Diagrams, Installation Instructions & Battery Switch Overview
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Features and Specifications for

m-ACR 7601 and Mini Add-A-Battery 7649

m-ACRAutomatic 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

•Ignition protected—safe for installation aboard gasoline powered boats

•For 12 or 24 volt systems

•Dual Sensing—senses charging on either battery bank

LED Status Chart

LED

BATTERY STATUS

REASON

Solid ON

Combined

Charging

Single Flash (15 sec.)

Isolated

Standby

Double Flash

Isolated (Start Isolation)

Start Isolation wire is energized

Triple Flash

Isolated (Under Voltage Lockout)

One or both batteries are below

 

 

9.5V (12V System) 19V (24V System)

Specifications

Intermittent Rating (5 min.)

115A

Continuous Rating

65A

Operating Current (Combine)

90mA

Operating Current (Open)

15mA

Cable Size (to meet current ratings)

6 AWG (16mm²)

Maximum Cable Size

1/0 AWG (50mm²)

Terminal Stud Size

1/4"-20

Maximum Torque

60 in-lbs (6.8 Nm)

Relay Contact Position

12V DC

24V DC

Combine

(30 sec.)

13.6V DC

27.2V DC

 

(2 min.)

13.0 V DC

26.0V DC

Open Low

(10 sec.)

12.35V DC

24.7V DC

 

(30 sec.)

12.75V DC

25.5V DC

Over Voltage Lockout

 

16.0V DC

--

Under Voltage Lockout

9.5V DC

19.0V DC

Under Voltage Reset

 

10.0V DC

20.0V DC

Regulatory

Emarked for Ignition Protection, Meets ISO 8846 and SAE J1171 external ignition protection requirements Rated IP67----temporary immersion up to 1 meter for 30 minutes

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

•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.)

1,000 Amps

Cranking Rating (1 min.)

650 Amps

Intermittent Rating (5 min.)

450 Amps

Continuous Rating

300 Amps

Maximum Voltage

32 Volts

Cable Size to Meet Ratings

4/0 AWG (120mm²)

Terminal Stud Size

3/8"-16 (M10)

Maximum Torque

120 in-lbs (13.56 Nm)

Regulatory

Emarked for ignition protection, meets UL1500 and SAE J1171 external ignition protection requirements

Rated IP66---protected against powerful water jets

Installation Instructions

m-ACR Automatic Charging Relay 7601

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 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.

m-ACR Voltage Sensing

• The 7601 m-ACR will sense a charge being applied to either battery bank.

Use the wire sizing chart below to select the appropriate wire sizes to prevent overheating the m-ACR.

 

Wire Size and Fuse Rating Chart

 

Charging Amps

Min. Wire Size* (AWG)

Fuse Rating

Min. Wire Size* (Metric)

≤30

#10

40A-50A

6 mm²

≤50

#8

60A-65A

10 mm²

≤65

#6

90A-100A

16 mm²

* Larger wire sizes may be required to minimize voltage drop in long wire runs.

For more information please use the Circuit Wizard at www.circuitwizard.bluesea.com

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.

m-ACR optional connection:

To enable start isolation:

•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.

Installation Instructions

m-Series, Dual Circuit Plus™ Battery Switch 6011 (Included with 7649 Mini Add-A-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)

980014350 Rev.001

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Contents Installation Instructions ACR Automatic Charging Relay ACR 7601 and Mini Add-A-BatteryGuarantee Combined alternator Starter wires

m-ACR 7601 specifications

Blue Sea Systems m-ACR 7601 is a sophisticated automatic charging relay designed to ensure a reliable and efficient distribution of power in marine and recreational vehicle applications. This innovative device plays a vital role in optimizing battery management systems, offering users increased functionality and safety.

One of the standout features of the m-ACR 7601 is its ability to automatically combine and isolate battery banks based on charging needs. This allows for simultaneous charging of two battery banks while preventing depletion of the starting battery. The smart design ensures that the engine-starting battery remains fully charged, enhancing overall system reliability.

Another key characteristic is its use of advanced electronic circuitry, which enables seamless operation without the need for manual intervention. The m-ACR 7601 is equipped with a microprocessor-controlled system that monitors battery voltage and intelligently connects or disconnects the battery banks as required. This technology reduces the risk of overcharging and extends the lifespan of the batteries, making it a cost-effective solution for boat owners and RV enthusiasts alike.

The m-ACR 7601 features a compact design, making it suitable for a variety of installations, even in tight spaces. Its sturdy construction is marine-rated, ensuring durability in harsh marine environments. The relay is designed to withstand high humidity, saltwater exposure, and temperature fluctuations, ensuring consistent performance and reliability.

Safety is further enhanced with built-in protective features such as reverse polarity protection and an internal fuse. This helps prevent damage to the device and the batteries themselves, providing peace of mind for users.

The installation of the m-ACR 7601 is straightforward, with clear wiring diagrams and mounting options for easy integration into existing systems. It is also compatible with various battery types, allowing for flexibility in battery choice according to user needs.

In summary, the Blue Sea Systems m-ACR 7601 is an advanced automatic charging relay tailored for demanding marine and recreational applications. Its intelligent battery management capabilities, robust construction, and user-friendly design make it an essential component for anyone looking to enhance their power management system onboard. With features focused on safety, efficiency, and reliability, the m-ACR 7601 stands out as a top choice for those seeking to maximize their battery performance while enjoying their time on the water or the road.
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