Blue Sea BS 7622 and BS 7623 ML ACR Automatic Charging Relay 12 or 24V DC, 500A with manual control with magnetic latching (bi-stable relay) automatically combines batteries during charging and isolates batteries during discharge and engine starting, and additionally provides a manual override switch on the device.
KEY FEATURES
- Manual override switch provides an added level of safety, allowing control with or without power, and providing a LOCK OFF function for servicing.
- Includes Contura switch remote control of ML-Series Contura switches PN 2146
- Automatically manages the charging of two large battery banks
- Allows parallel connection of battery banks for emergency starting
- 500 Amps continuous current rating to support high-output alternators
- Magnetic Latch (ML)-ACR consumes very little power (<40mA to monitor terminal voltage) in "ON" or "OFF" operating states, and consumes low current for very short periods during state changes.
- Dual sensing charge on both battery banks
- Start Isolation (SI) - can be configured for momentary isolation of loads from the engine circuit to protect sensitive electronics.
- Engine Isolation (EI) - can be configured for isolation of two engines while both are running to protect engine electronics and maximize alternator output
- LED output for remote indication when batteries are combined, isolated, with voltage lock-out or during start or engine isolation.
- 3/8"-16 tinned studs for maximum conductivity and corrosion resistance
- 7/8" (22mm) stud length for multiple cable connections
- Silver-alloy contacts provide high reliability for switching under load
- Label recesses for circuit identification
TECHNICAL DETAILS
- Nominal Voltage: 12V or 24V DC
- Manual Control: Yes
- Engine Isolation (Condition: 2 engines running, one relay is open and one closed, engine 1 start battery and engine 2 start battery are isolated to protect engine electronics.)
- Mounting: #10
- Start Assist - Engine Cranking - Relay is closed and combines batteries
When the starter battery is low, the batteries are combined to share the load. - Start Isolation - Engine Cranking - Relay opens isolating batteries
The batteries are isolated to protect sensitive electronics from voltage drops and surges. - Current Operating Current: 13mA
- Current Draw Operating Current during state change: <7.0A
- Continuous Charge Current: 500A
- Peak Charge Current: 700A (5 min)
- Cranking Power 30 Sec.: 1450A DC
- Recommended Cable Gauge: 4/0 AWG x 2
- Live Current Switching: 300A @ 12V DC
- Switching Cycles: 100000
- Terminal Stud Torque: 15.82 Nm
- Ring Terminal Clearance: 28.45 mm
- Terminal Stud Length: 38.1 mm
- Terminal Stud Size: 3/8" - 16 (M10)
- Wire Gauge: 20 AWG
- Relay Contact Position: Combined 30 sec.: 13.5V
Combined 90 sec. 13.0V
Open 10 sec. 12.35V
Open 30 sec. 12.75V
Open high: 16.2V