BR-Automation Automation PC 820, User Manual, Page: 61 / 252

Technical data • Entire device
Chap
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61 Automation PC 820 User's Manual V 1.00
2.6.15 Battery
The lithium battery (3 V, 950 mAh) buffers the internal real-time clock (RTC) as well as the
individually saved BIOS settings and data in the SRAM and is located behind the black cover.
The buffer duration of the battery is at least 2½ years (at 50°C, 8.5 µA of the supplied
components and a self discharge of 40%). The battery is subject to wear and should be replaced
regularly (at least following the specified lifespan).
The battery is located behind the cable cover.
Battery status evaluation
The battery status is evaluated immediately following start-up of the device and is subsequently
checked by the system every 24 hours. The battery is subjected to a brief load (1 second) during
the measurement and then evaluated. The evaluated battery status is displayed in the BIOS
Setup pages (under Advanced - Baseboard monitor) and in the B&R Control Center (ADI driver),
but can also be read in a customer application via the ADI Library.
Battery
Battery
Type
Removable
Lifespan Renata 950 mAh
Yes, accessible from the outside
2½ years
1)
1) At 50°C, 8.5 µA of the supplied components and a self discharge of 40%.
Accessories Short description
0AC201.91 Lithium batteries, 4 pcs .
Lithium batteries (4 pcs.),
3 V / 950 mAh, button cell
4A0006.00-000 Lithium battery (1x)
Lithium battery (1 pcs.),
3 V / 950 mAh, button cell
Table 44: Battery
Battery status Meaning
N/A Hardware, i.e. firmware used is too old and does not support read.
Good 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 45: Meaning of battery status
Battery
Dongle