Siemens OP5 Equipment Manual page 129

Maintenance
OP maintenance
The Operator Panels are designed for low-maintenance operation. Mainte-
nance includes
The procedure for changing the backup battery is described below.
Backup battery
The backup battery of the OP5 and the OP15 insures that, when the power
supply is turned off,
Lifetime
The OP uses a 3.6 V/approx. 1.5 Ah lithium battery. It is installed in the de-
vice ex works and has a typical life of about four years under normal operat-
ing conditions.
Battery condition
An exhausted battery is indicated by a system message during routine opera-
tion of the OP. The backup battery should be changed as quickly as possible
after the message is displayed.
Sources of supply
You can obtain new batteries from the Siemens spare parts service. They are
made ready for installation and include a cable and plug connectors.
Safety notices When you handle lithium batteries, keep in mind the following advice:
Manual OP5, OP15
( ) J31069-D0840-U001-A2-7618
regular cleaning of the keyboard membrane and the display with a damp
cloth (water only) and
replacing the backup battery.
operating data are retained in the static RAM of the OP and
the hardware clock continues to run (OP15 only).
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