Siemens SINAMICS S120 Manual page 343

Replacing
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. Complete the procedure by carrying out the above actions in reverse order.
Table 6- 4
Type
Vendor
Rated capacity
Maximum permissible charging current
Self-discharge at 20 °C
Service life (in backup mode)
Note
Time for replacing the battery
You must replace the battery within a period of one minute.
If the process takes longer than a minute, this can result in data being lost!
The battery must be disposed of in accordance with the applicable country-specific
guidelines and regulations.
Cabinet Modules
Manual, 03/2013, A5E03263538A
Technical data for the backup battery
Maintenance and servicing
6.4 Replacing components
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
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