Lifetime of Unrivalled Australian Technical Support

Dealer Portal

ML-ACR Automatic Charging Relay – 12V DC 500A

BS-7620

Features

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

  • 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

Specifications

Control Circuit ConnectionTinned Wire
Nominal Voltage12V DC
Manual ControlNo
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 sec13.5V
Combine 90 sec13.0V
Open 10 sec12.35V
Open 30 sec12.75
Open High16.2V
Weight0.93 kg