Overview
1.2 Design of the HMI device
Mobile Panel 277F IWLAN
22
Operating Instructions, 12/2007, A5E01003940-01
1.2.3
Battery
Purpose
The HMI device is supplied with a main battery and a bridging battery.
Main battery and bridging battery
When fully charged, the main battery guarantees approximately 4 hours' operation time in
normal operation. After this time, the battery must be either changed or recharged.
You can change the main battery while the HMI device is operating. The bridging battery
supplies the power while the main battery is being changed.
While the power is being drawn from the bridging battery, the following features are
deactivated:
● Display backlighting
● Membrane keyboard
● Touch screen
● Function key LEDs
● Illuminated pushbuttons
● USB interface
Charging options
To charge the main battery, you have the following possibilities:
● In the HMI device while it is in the charging station
● In the charging compartment of the charging station
● In the HMI device when connected to the tabletop power supply unit
See also
Inserting, charging and changing the battery (Page 83)
Charging batteries in the charging compartment (Page 120)
1.2.4
Charging station
The following figure shows the charging station.
