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

PN 7621

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

Product Documents

Specifications
Control Circuit Connection	Tinned Wire
Nominal Voltage	24V DC
Manual Control	No
Engine Isolation	Yes
Mounting	#10
Start Assist	Yes
Start Isolation	Yes
Amperage Operating Current continuous	<.004A
Continuous Rating	500A
Intermittent Rating	700A (5 min)
Cranking Rating 10 sec	2500A
Cranking Rating 1 min	1100A
Amperage Operating Current when changing state	<7.0A
Cable Size to Meet Ratings	4/0 AWG x 2
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)
Terminal Stud Torque	140 in-lb (15.82 Nm)
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	19.2V
Weight	2.08lb (0.94 kg)