Siemens SIMATIC HMI Operating Instructions Manual page 90

Installation and connection
4.8 Inserting, charging and changing the battery
The "Battery" tab in the "OP" dialog box in the Control Panel displays the charging status
and temperature of the main battery and bridging battery.
Requirements
● The project on the HMI device is complete and the HMI device is switched off
● You have opened the battery compartment of the HMI device
Procedure
Observe the safety information!
Proceed as follows:
1. Remove the main battery using the ribbon.
2. Open the connection bay.
3. Disconnect the plug connector of the bridging battery.
4. Remove the bridging battery.
5. Plug the plug connector of the new bridging battery into the interface in the connection
bay.
6. Insert the new bridging battery.
7. Align the lines.
8. Close the connection bay.
9. Insert the main battery.
10. Replace the cover on the battery compartment.
90
CAUTION
Shutdown or global rampdown
If the bridging battery can no longer be charged, the HMI device will switch off the next
time the main battery is changed.
Change the bridging battery at least every 5 years.
NOTICE
Bridging of main battery not possible
After the bridging battery is changed it must first be recharged before the main battery
can be bridged.
Do not change the main battery immediately after changing the bridging battery. Check
the charging status of the bridging battery first.
The plug connector is coded. There is no risk of incorrect connection.
The fastener of the battery compartment cover must engage below the locking latch.
Mobile Panel 277F IWLAN
Operating Instructions, 12/2007, A5E01003940-01