Siemens S5-135U/155U - Manual (Page 132)

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System Manual
C79000-G8576-C199-06
4.4.5 Maintenance
!
Caution
Incorrect replacement of the battery can result in the danger of explosion.
It should only be replaced by the same type or an equivalent type
recommended by the manufacturer. Used batteries should be disposed of
according to the manufacturer’s instructions.
You can replace the backup battery without loss of data if the power supply
unit is switched on, or if you apply an external voltage (3.4 V) at the “Ext.
Batt.” sockets. The backup battery must be replaced every 3 years at the
latest, irrespective of memory configuration and backup operation. Replace
the battery as follows:
Step Action
1 Pull the cover downwards.
2 Pull the battery submodule forwards and out, and remove it.
3 Replace the battery.
4 Ensure correct polarity.
5 Once the new battery is fitted and system voltage is On, press the Reset
button on the power supply unit.
Cover
Battery Submodule
Sockets for External
Backup Voltage
*
+
Only use battery submodules with the order number 6XG3 400-2CK00.
Replacing the
Lithium Battery
Battery
Submodule
Central Controllers and Expansion Units Power Supply Units