Blue Sea Systems m-ACR 7601 User Manual
Features and Specications for
m-ACR 7601 and Mini Add-A-Battery 7649
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
• 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)
Specications
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
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-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
beaguideforwiringaspecicvessel.
• 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
a10Ain-linefusetopreventfaultcurrentsfromowinginthiswire.
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.
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
Specications
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
E marked for ignition protection, meets UL1500 and SAE J1171 external ignition
protection requirements
Rated IP66---protected against powerful water jets
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
m-ACR Installation Diagram
run
accessory
Mini Add-A-Battery Installation Diagram
OPTIONAL SWITCH
FOR NO CURRENT DRAW
WHEN IN STORAGE
Dimensioned Drawings
m ACR, Automatic Charging Relay 7601
2.85"
72.3mm
2.85"
72.3mm
55.2mm
FRONT
1.84"
46.7mm
2.18"
REAR PANEL
MOUNT IN
Ø2-5/16"
59mm
HOLE
FRONT PANEL
MOUNT IN
Ø2-5/8" (67mm)
HOLE WITH
MAX. PANEL
THICKNESS
5/16" (8mm)
52.2mm
0.38"
9.7mm
0.13"
3.2mm
Ø
off
START KEY SWITCH
m-ACR 7601
16 AWG
10A
FUSE
COMMON BUS BAR
GROUND
2.06"
1.22"
30.9mm
2.57"
65.2mm
SIDE - WITH COVER
0.39"
10mm
0.84"
21.4mm
16 AWG
0.44"
11.1mm
STUD
HEIGHT
1/4"-20
1.02"
25.8mm
start
2A
FUSE
OutboardAccessories
StartHouse
OPTIONAL
START ISOLATION
(SI) WIRE
m-Series, Dual Circuit Plus™ Battery Switch 6011
(Included with 7649 Mini Add-A-Battery)
2.825"
2.176"
71.76mm
55.27mm
2.176"
55.27mm
2.825"
71.76mm
REAR PANEL
MOUNT IN
Ø2-5/16"
59mm
HOLE
0.153"
3.87mm
1.298"
32.97mm
0.753"
19.11mm
0.310"
7.87mm
44.96mm
3.068"
77.94mm
1.770"
0.900"
22.86mm
FRONT PANEL
MOUNT IN Ø2-5/8"
67mm HOLE
Engines with
accessory
off
start
run
2A FUSE
combined alternator
and starter wires
- typical of outboard motors
Accessories
START KEY SWITCH
Dual Circuit Plus™ Battery Switch 6011
Included in Mini Add-A-Battery kit,
recommended for 7601
m-ACR
21
Outboard
m-ACR 7601
House Start
16 AWG 16 AWG
OPTIONAL SWITCH
FOR NO CURRENT DRAW
WHEN IN STORAGE
10A FUSE
COMMON BUS BAR
GROUND
See Wire Size and Fuse Rating chart for connections from ACR positive terminals.
Note: To determine wire sizes and fuse ratings for all other wires illustrated, please visit
the Circuit Wizard at circuitwizard.bluesea.com
• These installation diagrams show typical applications only. Your application may differ.
For further information, please go to www.bluesea.com and navigate to Resources/Application Briefs
and Technical Briefs.
• Because the m-ACR is dual sensing, the battery connection terminals are interchangeable.
m-ACR function will not be affected by reversal of the starting and house batteries versus the diagram.
•IfthestatusindicatorLEDistriple-ashing,them-ACR is in a lockout state, and will not combine
batteries until the lockout condition is removed. Ensure neither battery is below 10V for a 12V system
or 20V for a 24V system.
•IfthestatusindicatorLEDisdouble-ashing,checkforpositivevoltageonthestartisolationterminal.
• It is recommended that the m-ACR be connected directly to your battery positive terminals through
appropriately sized fuses. Connecting in a different location such as a battery switch may affect
accuracy because of voltage drop along current carrying conductors.
• If you are not knowledgeable about marine electrical systems,
please consult an electrical professional for help with installation.
• Ifyourelectricalsystemisconguredwithachargingsourcethatcannotsupply
the full load current being drawn from the batteries, open/close cycling
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 information at www.bluesea.com/about.
For customer service, call 800-222-7617.
OPTIONAL
START ISOLATION
(SI) WIRE
425 Sequoia Drive
Bellingham, WA 98226 USA
p 360.738.8230
p 800.222.7617 USA and Canada
f 360.734.4195
conductor@bluesea.com
www.bluesea.com
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