rence Report: ABB TA521 Lithium Button Cell Battery Assembly

ABB TA521 Encapsulated CR2450 Lithium Manganese Dioxide Battery with Adapter Cable, Part Code: 1SAP180300R0001ABB Official Function Description TA521 is a dedicated non-rechargeable lithium backup battery accessory exclusively for ABB AC500 PLC CPU modules. Its core function is to supply continuous 3V standby power to the CPU’s SRAM memory and real-time clock (RTC) when the main PLC power supply is disconnected or failsABB. Official Function Description TA521 is a dedicated non-rechargeable lithium backup battery accessory exclusively for ABB AC500 PLC CPU modules. Its core function is to supply continuous 3V standby power to the CPU’s SRAM memory and real-time clock (RTC) when the main PLC power supply is disconnected or failsABB. Key functional points: Preserves user program data, reten