Blue Sea ML HD Auto Charge Relay with Manual Control (24V DC / 500A)

Blue Sea 500 Amp magnetic latching (bi-stable) relay 7623 automatically combines batteries during charging and isolates batteries when discharging and when starting engine. The manual control switch provides an added level of safety allowing control with or without power, and offering "Lock Off" capability for servicing.
Includes ML-Series Remote Control Contura Switch PN 2146
Automatically manages the charging of two large battery banks
Allows paralleling of battery banks for emergency starting
500 Ampere continuous rating to support high-output alternators
Magnetic Latch (ML) - ACR draws very low current (<40mA to monitor terminal voltage) in the "ON" or "OFF" states, and draws moderate current for very short time when changing state
Dual sensing - senses charge on both battery banks
Start Isolation (SI) - can be configured for temporary isolation of House loads from Engine circuit during engine cranking 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
Senses charging on two battery banks
LED output to remotely indicate when batteries are combined, isolated, in voltage lockout, or in Start or Engine isolation
3/8"-16 tin-plated copper studs for maximum conductivity and corrosion resistance
7/8" (22mm) stud length accepts multiple cable terminals
Silver alloy contacts provide high reliability for switching live loads
Label recesses for circuit identification

Specifications
Control Circuit Connection: Tinned Wire
Nominal Voltage: 24V DC
Manual Control: Yes
Engine Isolation: Yes
Mounting: #10
Start Assist: Yes
Start Isolation: Yes
Amperage Operating Current: 13mA @ 25°C nominal VDC
Amperage Operating Current when changing state: <7.0A
Terminal Stud Torque: 140 in-lb (15.82 Nm)
Continuous Rating: 500A
Intermittent Rating (5 min): 700A
Cranking Rating 30 sec: 1450A DC
Operating Temperature: -10°C to 60°C
Cable Size to Meet Ratings: 4/0 AWG x 2
Live Current Switching: 300A @ 12V DC
Stud Material: Tinned Copper
Switching Cycles: 100000
Terminal Ring Diameter Clearance: 1.12" (28.45 mm)
Terminal Stud Length: 1.50" (38.1 mm)
Terminal Stud Size: 3/8" - 16 (M10)
Wire Size: 20 AWG

Relay Contact Position
Combine 30 sec: 27.0V
Combine 90 sec: 26.0V
Open 10 sec: 24.7V
Open 30 sec: 25.5V
Open High: 32.4V
Weight: 2.10lb (0.95 kg)

Approvals: CE, IP66, ISO 8846 Marine, SAE J1428