SOLENOID ML 500A 12V ACR W/MANCTRL

500 Amp magnetic latching (bi-stable) relay automatically combines batteries during charging and isolates batteries when discharging and when starting engine

• 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

SpecificationsControl Circuit Connection
Nominal Voltage12V DC
Manual Control
Engine Isolation
Mounting#10
Start Assist
Start Isolation
Amperage Operating Current13mA
Amperage Operating Current when changing state<7.0A
Terminal Stud Torque140 in-lb (15.82 Nm)
Continuous Rating 500A
Intermittent Rating 700A (5 min)
Cranking Rating 30 sec 1450A DC
Cable Size to Meet Ratings4/0 AWG x 2
Live Current Switching300A @ 12V DC
Switching Cycles100000
Terminal Ring Diameter Clearance1.12in (28.45 mm)
Terminal Stud Length1.50in (38.1 mm)
Terminal Stud Size3/8" - 16 (M10)
Wire Size20 AWG
Relay Contact PositionCombine 30 sec13.5V
Combine 90 sec13.0V
Open 10 sec12.35V
Open 30 sec12.75V
Open High16.2V
Weight2.06lb (0.93 kg)