Automatic Charging Relays ML-ACRs

ML-ACR Automatic Charging Relay - 24V DC 500A

7621
500 Amp magnetic latching (bi-stable) relay automatically combines batteries during charging and isolates batteries when discharging and when starting engine
  • 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
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Specifications
Control Circuit Connection Tinned Wire
Nominal Voltage24V DC
Manual Control No
Engine Isolation Yes
Mounting#10
Start Assist Yes
Start Isolation Yes
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
Minimum Operating Temperature-10° C
Maximum Operating Temperature60° C
Cable Size to Meet Ratings4/0 AWG x 2
Live Current Switching300A @ 12V DC
Stud MaterialTinned Copper
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 PositionSPEC_HEADER
Combine 30 sec27.0V
Combine 90 sec26.0V
Open 10 sec24.7V
Open 30 sec25.5V
Open High32.4V
Weight2.08lb (0.94 kg)
Included
QtyPNProduct
1 2146 SPDT Remote Control Contura Switch - ON-OFF-ON
Optional Accessories
1147 Remote Control Panel
1520 360 Panel Blank ML-Contura Switch
9160 ML Series Link Bus
Meets the following Regulatory Specifications
CE Marked
IP66
ISO 8846
SAE J1428
Remote Battery Management and ACR SubSystem

Remote Battery Management and ACR SubSystem


The ML-ACR (Automatic Charging Relay) and ML-RBS (Remote Battery Switch), when paired, offer complete battery management of large battery banks with the push of a button. In addition to automatically sharing the charge from an engine’s alternator between the start and auxiliary battery, the ML-ACR control switch provides momentary battery combining to assist with starting in the event of a low engine battery. Multiple remote battery switches can be easily connected to the ML-ACR with the optional Paralleling Link Bus for a complete remote battery management Subsystem.

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