B&R MAPPC700A-ENG, User Manual

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Maintenance / Servicing • Changing the battery
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453 Panel PC 700 with 945GME N270 CPU board User's Manual V 1.16
Chapter 7 • Maintenance / Servicing
The following section describes service/maintenance work which can be carried out by a trained,
qualified user.
1. Changing the battery
The lithium battery buffers the internal real-time clock (RTC) and the CMOS data. The buffer
duration of the battery is at least 4 years (at 50°C, 8.5 μA current requirements of the supplied
components and a self discharge of 40%).
1.1 Battery check
The battery status (good or bad) is checked every time the device is turned on, as well as every
24 hours. The check involves applying a load to the battery for a short time (approx. 1 second),
followed by an evaluation. The evaluated battery status is displayed in the BIOS Setup pages
and in the B&R Control Center (ADI driver), but can also be read in a customer application via
the ADI Library.
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 following replacement lithium batteries are available:
• 4A0006.00-000 (1 piece)
• 0AC201.91 (4 pcs.)
Battery status Meaning
OK Data buffering is guaranteed
Bad Data buffering is guaranteed for approx. another 500 hours from the point in time that the battery capacity is
determined to be BAD (insufficient).
Table 256: Meaning of battery status OK - Bad