Bernecker + Rainer 4MP181.0843-03, User Manual

Page: 141 / 160

Maintenance / Servicing • Changing the Battery
Ch
apte
r 7
Ma
inte
nanc
e /
Servic
ing
141 Mobile Panel User's Manual V 1.5
3. Changing the Battery
Batteries only need to be changed on devices which have a lithium battery.
The lithium battery guarantees buffering of the internal real-time clock (RTC), SRAM data, and
individually saved BIOS settings. The battery status (good or bad) can be queried using
software. From the point when battery capacity is recognized as insufficient, data buffering is
guaranteed for approximately another 500 hours. When changing the battery, data is buffered
for approximately another 10 minutes by a gold leaf capacitor. The buffer duration of the battery
lasts at least two years (at 50°C).
3.1 Procedure
1) Remove the handle by loosening the hex screw with a 4 mm screwdriver.
Danger!
The battery may only be exchanged by trained personnel when the Mobile Panel
device and the entire system are turned off.
Warning!
Before dismounting, place the Mobile Panel device on a clean flat surface with the
display facing down so that the operating elements are not damaged.
Figure 70: Taking out the locking screw
Open