Replacing The Optional Backup Battery - Siemens Multi Panel MP270 SIMATIC HMI Equipment Manual

Maintenance/Upkeep
10.2

Replacing the Optional Backup Battery

Backup battery function
An optional backup battery is available for the MP270 (refer to Chapter 9). The
battery ensures that the internal hardware clock continues to run even when the
power supply is interrupted.
Under normal operating conditions, the battery has a service life of approx. 4
years.
Supply source
The battery can be ordered from the Siemens spare parts service. It is shipped
ready for installation with a lead and connector. Please refer to our catalog ST80
for the order number.
Before replacing
Observe the following before changing the battery:
Caution
!
Change the battery while power is still being supplied to ensure the internal
hardware clock continues to run.
The battery must be changed by a properly qualified person.
Before replacing the battery, refer to the ESD Guidelines in Appendix D.
10-2
MP270 Equipment Manual
Release 01/99