ML-ACR Automatic Charging Relay with Manual Control – 24V DC 500A

BS-7623

Features

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
  • ML-Series Remote Control Contura Switch PN 2146 available as a seperate item.
  • 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 ConnectionTinned Wire
Nominal Voltage24V DC
Manual ControlYes
Engine IsolationYes
Mounting#10
Start AssistYes
Start IsolationYes
Amperage Operating Current13mA
Amperage Operating Current when changing state<7.0A
Terminal Stud Torque140 in-lb (15.82 Nm)
Continuous Rating500A
Intermittent Rating700A (5 min)
Cranking Rating 10 sec2500A
Cranking Rating 1 min1100A
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 Position
Combine 30 sec27.0V
Combine 90 sec26.0V
Open 10 sec24.7V
Open 30 sec25.5V
Open High32.4V
Weight0.95 kg