Siemens Simatic box pc 627b Operating Instructions Manual page 75

Preparation
Note
For the BIOS setting "Profile: Standard" the configuration data of the device is deleted when
the battery is replaced.
For the BIOS setting "Profile: User" the configuration data of the device is retained; only the
date and time has to be reconfigured.
1. Note down the current settings of the BIOS Setup.
2. Disconnect the device from mains and unplug all cables.
Replacing the battery
Follow the steps outlined below:
Steps for replacing the battery
1
SIMATIC Box PC 627
Operating Instructions, Release 05/2006, A5E00362052-03
A list in which you can note down this information is found in the BIOS manual.
Notice
The battery can also be exchanged when the device is operating. However, we
recommend switching off the device, beforehand.
Open the battery compartment.
11.1 Removing and installing hardware components
Maintenance and service
11-3