Replacing The Backup Battery - Siemens SIMATIC S7-400 Installation Manual

Automation system, hardware and installation
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Maintenance
7.1

Replacing the Backup Battery

Replacing the Backup Battery
1. Discharge any static charge by touching a grounded metal part of the S7-400.
2. Open the cover of the power supply module.
3. Using the loop(s), pull the backup battery/batteries out of the battery
compartment.
4. Insert the new backup battery/batteries in the battery compartment of the power
supply module.
Ensure correct polarity of the battery/batteries.
5. Switch on battery monitoring with the BATT INDIC slide switch.
have a single-width power supply module,
have a double or triple-width power supply module
and want to monitor a backup battery,
have a double or triple-width power supply module
and want to monitor both backup batteries,
6. Press the FMR button.
7. Close the cover of the power supply module.
Note
If you store the batteries for a long period, a passivation layer may form. Please
read Section 6.8, Inserting a Backup Battery.
7-2
If You ...
Automation System S7-400 Hardware and Installation
...Then
set the BATT INDIC switch to
BATT.
set the BATT INDIC switch to
1BATT.
set the BATT INDIC switch to
2BATT.
A5E00850741-01

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