Siemens SINAMICS S120 Operating Instructions Manual page 68

Maintenance and servicing
5.1 Replacing the backup battery
1. Disconnect the 24 V DC power-supply cable.
2. Disconnect the communication cable on the operator panel.
3. Open the cover of the battery compartment.
4. Remove the old battery.
5. Insert the new battery.
6. Carry out any other work by reversing the sequence.
Table 5- 1
Type
Manufacturer
Nominal capacity
Maximum permissible charging current
Self-discharge at 20 °C
Service life (in backup mode)
Service life (in operation)
Note
You must replace the battery within one minute; otherwise, the AOP settings may be lost.
Note
The battery must be disposed of in accordance with the applicable country-specific
guidelines and regulations.
68
Technical data for the backup battery
CR2032 3 V lithium battery
Maxell, Sony, Panasonic
220 mAh
10 mA (restricted to < 2 mA in operator panel)
1%/year
> 1 year at 70 °C > 1.5 years at 20 °C
> 2 years
Cabinet Modules Operator Panel AOP30
Operating Instructions, 04/2014, A5E03263551A