ML-ACR Automatic Charging Relay with Manual Control - 24V DC 500A
OEM: 7623
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
- 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

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Product Details (30)
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
Amperage Operating Current when changing state
<7.0A
Terminal Stud Torque
140 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 Temperature
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
1.12in (28.45 mm)
Terminal Stud Length
1.50in (38.1 mm)
Terminal Stud Size
3/8" - 16 (M10)
Wire Size
20 AWG
Relay Contact Position
SPEC_HEADER
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)