Blue Sea 7620 Marine ML-ACR Automatic Charging Relay - 12V DC 500A

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

Features

• 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

Specifications

• Control Circuit Connection: Tinned Wire
• Nominal Voltage: 12V DC
• Manual Control: No
• 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 degree C
• Maximum Operating Temperature: 60 degree 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: 13.5V
• Combine 90 sec: 13.0V
• Open 10 sec: 12.35V
• Open 30 sec: 12.75V
• Open High: 16.2V
• Weight: 2.04lb (0.93 kg)

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