AB12G 3BSC760019E1 Replacement Battery for ABB AC 800M PM860 PM861 PM864 PM865 CPU 3.7V 2.4Ah 8.88Wh

Compatible ABB AC 800M CPU Battery Replacement

The AB12G 3BSC760019E1 is a precision-engineered lithium-ion backup battery designed specifically for ABB AC 800M PM860, PM861, PM864 and PM865 processor modules. This 3.7V 2.4Ah cell preserves SRAM data and real-time clock during power loss—preventing the dreaded "Memory Lost" error after a mains interruption.

Technical Specifications

• Model: AB12G / SB822 AB12G (364-1115)
• ABB Order Code: 3BSC760019E1
• Voltage: 3.7V DC | Capacity: 2.4Ah (8.88Wh)
• Cycle Life: ≥1000 charges
• Operating Temp: -20°C to +60°C
• Connector: Gold-finger with anti-reverse latch

Compatible ABB Systems

This backup cell installs directly into the rear battery slot of ABB AC 800M controllers including PM851, PM856, PM860, PM861, PM861A, PM862, PM863, PM864, PM864A, PM865, PM866, PM891, PM902 and PM903. Also fits ABB 800xA DCS and selected Advant Controller 410/450 configurations.

FAQ

What happens if the AB12G battery fails?

A depleted or failing 3BSC760019E1 causes the AC 800M CPU to lose SRAM contents and RTC time after any power interruption—triggering a "Memory Lost" error that requires manual program reload. Replacement every 3–5 years during planned outages is recommended.

Is the 3BSC760019E1 hot-swappable?

Yes. Insert or remove the AB12G cell with the controller powered; a mechanical anti-reverse latch prevents incorrect orientation. Reinsertion within 30 seconds avoids RAM corruption. Full recharge completes in 2–4 hours.