or 4 payments of 
Description
ML-Series Automatic Charging Relay – 12V DC / BS-7620
500 Amp magnetic latching (bi-stable) relay automatically combines batteries during charging and isolates batteries when discharging and when starting engine.
HIGHLIGHTS
- 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
- PART NUMBER: BS-7620
- 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° 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: 1.12″ (28.45 mm)
- TERMINAL STUD LENGTH: 1.50″ (38.1 mm)
- TERMINAL STUD SIZE: 3/8″ – 16 (M10)
- WIRE SIZE: 20 AWG
RELAY CONTACT POSITION
- 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: 2.04 lb (0.93 kg)
