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7.2
Buffer battery replacement
CAUTION!
The device contains a buffer battery that is used for data buffering when the device is in switched
off mode or if the power fails. The operating life of the battery is typically 6 years. If the battery
is low, this is indicated by a fault message in the event list ("Battery almost empty").
Danger of data loss!
Replace battery in time.
CAUTION!
Incorrect handling may result in damage or malfunctions.
This compromises the function of the central processing unit or the system as a whole.
Only qualified personnel are permitted to replace the buffer battery. The country-specific require-
ments regarding changes to an electrical device must be observed. Before replacement, the system
must be shut down and isolated from the power supply.
CAUTION!
Electronic components may be damaged by electrostatic discharge.
This compromises the function of the central processing unit or the system as a whole.
Work may only be carried out at a grounded workstation and in compliance with the relevant safety
measures.
Shutting down the system
1. Shut down the system and disconnect it from the voltage supply. To do this, loosen the 2 screws of
the wired terminal strip +24V/GND and pull the terminal strip forward.
2. If necessary, pull off the wired terminal strip COM toward the front.
3. If necessary, remove other connecting cables (USB, LAN).
7 Annex
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