Siemens SINAMICS S120 Equipment Manual page 308

Maintenance and servicing
6.4 Replacing components
Preparatory steps
● Observe the "five safety rules".
● Disconnect the cabinet from the power supply (do not forget the external power supplies).
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- 3
Type
Vendor
Rated capacity
Maximum permissible charging current
Self-discharge at 20°C
Service life (in backup mode)
NOTICE
You must replace the battery within a period of 1 minute.
If the process takes longer than a minute, this can result in data being lost.
When disposing of old batteries, observe the applicable legal requirements.
308
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
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A