ABB AC500 PLC Hardware Manual page 1153

1.8.2.5 TA541 - Lithium Battery
● Manganese dioxide lithium battery, 3 V
● Non-rechargeable
Purpose The TA541 lithium battery is the only applicable battery for PM595
on page 80. It is used to save RAM content of the processor module (PM595-4ETH-F only) and
to back-up the real-time clock (all PM595 variants). It cannot be recharged.
The processor modules are supplied without a lithium battery. It therefore must be ordered sep-
arately. The TA521 Lithium Battery is used to save RAM contents of AC500 processor modules
and back-up the real-time clock. Although the processor modules can work without a battery, its
use is still recommended in order to avoid process data being lost.
The CPU monitors the discharge degree of the battery. A warning is output, before the battery
condition becomes critical (about 2 weeks before). After the warning message has appeared,
the battery should be replaced as soon as possible.
Handling ● Do not short-circuit or re-charge the battery! It can cause excessive heating and explosion.
Instructions
● Do not disassemble the battery!
● Do not heat up the battery and not put into fire! Risk of explosion.
● Store the battery in a dry place.
● Replace the battery with supply voltage ON in order not to risk data being lost.
● Recycle exhausted batteries meeting the environmental standards.
Battery Lifetime The battery lifetime is the time the battery can store data while the CPU is not powered. As long
as the CPU is powered, the battery will only be discharged by its own leakage current.
Technical Data
Parameter
Nominal voltage
Nominal capacity
Temperature range
2019/04/17
Value
3 V
1800 mAh
Operating: -40 °C...+70 °C
Storage: -40 °C...+85 °C
Transport: -40 °C...+85 °C
3ADR010121, 13, en_US
Device Specifications
Accessories > AC500 (Standard)
Ä Chapter 1.2.2.2 "PM595"
1153