User Manual

 
ML– ACR
Automatic Charging Relays
PN 7620 / PN 7621 (without manual control)
PN 7622 / PN 7623 (with manual control)
990180180 Rev.004
BlueSeaSystemsInc.  Phone(360)738-8230
425SequoiaDrive  Fax(360)734-4195
Bellingham,WA98226USA [e-mail]
www.bluesea.com
• Magnetic Latch (ML)—draws very low current in the ON or OFF states, and draws moderate current for very
short time when changing state
• Start Isolation (SI)—can be congured for temporary isolation of House loads from Engine circuit during engine
cranking to protect sensitive electronics
• Engine Isolation (EI)—can be congured for isolation of two engines while both are running to protect engine
electronics and maximize alternator output
• Senses charging on two battery banks
• LED output to remotely indicate when batteries are combined or isolated
• Tin-plated copper studs for maximum conductivity and corrosion resistance
• Label recesses for circuit identication
• Silver alloy contacts provide high reliability for switching live loads
Specications 12VDC 24VDC
Cranking Rating See table below See table below
Intermittent Rating See table below See table below
Continuous Rating See table below See table below
ML-Coil Function Bi-stable Bi-stable
Amperage Operating Current <40 mA continuous (control circuit) <40 mA continuous (control circuit)
<7A when changing state (20 ms) <4A when changing state (20 ms)
Contact Circuit Voltage 16V DC Max. 32V DC Max.
RelayContactPosition:
-Combine (30 sec.) 13.5V 27.0V
-Combine (90 sec.) 13.0V 26.0V
-Open Low (10 sec.) 12.35V 24.7V
-Open Low (30 sec.) 12.75V 25.5V
-Open High 16.2V 32.4V
Live Current Switching 300A@ 12V DC—10,000 Cycles -
Terminal Stud Size 3/8"-16 3/8"-16
Maximum Terminal Stud Torque 140 in-lb (15.8 N•m) 140 in-lb (15.8 N•m)
Ring Terminal Size 3/8" (M10) 3/8" (M10)
Terminal Ring Diameter Clearance 1.18" (30 mm) 1.18" (30 mm)
Control Circuit Current Draw <40 mA <40 mA
PN2146Switch
Action Sustained SPDT ON-OFF-ON
Seals Internal & External Gasket Panel Seal
Mounting Hole 0.83"x 1.45" (21.08 mm x 36.83 mm)
LED Rating 100,000 hours half-life
RegulatoryMeets ISO 8846 and SAE J1171 external ignition protection requirements, CE marked, Rated IP66
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.
Marine Electrical Prod ucts
OverviewofApplication
The ML-Series ACR automatically combines batteries during charging, and isolates batteries when there is no
charging sensed on either battery bank.
ML-Series ACR Function 12 Volt DC Operation 24 Volt DC Operation
Automatically combines battery
banks when sensed voltage
levels are:
Above 13.5V for 30 sec.
Above 13.0V for 90 sec.
Above 27.0V for 30 sec.
Above 26.0V for 90 sec.
Automatically isolates battery
banks when sensed voltage
levels are:
Below 9.6V (undervoltage lockout)
Below 12.35V for 10 sec.
Below 12.75V for 30 sec.
Above 16.2V (overvoltage lockout)
Below 19.2V (undervoltage lockout)
Below 24.7V for 10 sec.
Below 25.5V for 30 sec.
Above 32.4V (overvoltage lockout)
StartIsolationorEngineIsolation. The isolation inputs enable one of two functions depending on
how the inputs are congured.
NOTE: The ML-Series ACR can be congured for Start Isolation or Engine Isolation, but not both.
• StartIsolation - Temporary isolation (3−5 minutes) of house loads from the engine circuit during engine
cranking to protect sensitive electronics. Congure Start Isolation when there are heavy cranking loads
causing sags and spikes that might damage electronics in the House circuit. See page 3.
• EngineIsolation - Isolate two engines while both are running to protect engine electronics, and to
maximize alternator output. Congure Engine Isolation when the engine manufacturer requires it, and
when there are separate batteries for each engine. See page 3.
UndervoltageorOvervoltageLockout.
• Undervoltage lockout prevents batteries from being combined when either battery is below 9.6V@12V DC
operation or 19.2V@24V DC operation.
• Overvoltage lockout prevents batteries from being combined when either battery is above 16.2V@12V DC
operation or 32.4V@24V DC operation.
ControlSwitchRemoteOperation. Included Contura Control Switch—sustained (SPDT) ON-OFF-ON.
The Control Switch should be mounted in a convenient location near helm controls to allow for quick access.
NOTE: Alternatively use a momentary (SPDT) (ON)-OFF-(ON) or momentary push button switch to provide cross connect and/or battery isolation.
To cross connect
(combine) battery banks
Switch to “ON” combines battery banks to provide more battery power in hard
starting situations.
To isolate battery banks
Switch to “OFF”- when the battery banks are isolated using the Control
Switch, the battery banks remain isolated, and for at least 30 seconds after
the control switch is returned to the “AUTO” position.
ControlSwitchRemoteIndicationorML-ACRStatus
NOTE: The remote switch has two LEDs (top and bottom). These LEDs operate simultaneously-either they are both ON or both OFF.
page 1 of 4
PN Termination
Manual
Control
Control
Circuit
7620 Tinned Wires No 12V DC
7621 Tinned Wires No 24V DC
PN Termination
Manual
Control
Control
Circuit
7622 Tinned Wires Yes 12V DC
7623 Tinned Wires Yes 24V DC
LEDINDICATION ACRSTATEORCONDITION
RemoteSwitchSetto“AUTO”ornoRemoteSwitchInstalled
LEDs OFF Batteries are isolated
LEDs ON Batteries are combined
LEDs slow steady blink, ON-OFF Start or Engine Isolation is causing batteries to be isolated
LEDs quick steady blink, ON-OFF
Undervoltage lockout--either battery is below 9.6V@12V DC
operation or 19.2V@24V DC operation.
Overvoltage lockout--either battery is above 16.2V@12V DC
operation or 32.4V@24V DC operation.
RemoteSwitchSettoOVERRIDE“ON”or“OFF”—Automaticoperationissuspendedfor10minutes
afterremoteswitchisreturnedto“AUTO”
LEDs double blink,
Blink-Blink-Pause, Repeat
Manual override--check ACR for switch states OR
ACR mechanical failure
AvailableModels
AWG Metric (mm²) Cranking 10 sec. Cranking 1 min. Intermittent Rating 5 min. Continuous Rating
2/0 70 2,000A 750A 400A 225A
4/0 120 2,200A 750A 400A 300A
2x (4/0) 2x (120) 2,500A 1,100A 700A 500A
WireSizeandCurrentRatings