Technical data • Fully assembled device
60
Automation PC 810 with GM45 CPU board user's manual V1.28
2.6.17 Battery
The lithium battery (3 V, 950 mAh) buffers the internal real-time clock (RTC), individually stored BIOS settings as
well as data stored in SRAM on interface cards. It is located behind the black cover on the front of the device.
The battery's buffer lifespan is at least 2½ years (at 50°C, 8.5 μA for the components being supplied and a self-
discharge of 40%). The battery has a limited service life and should be replaced regularly (after the specified
service life at the latest).
Battery
Battery
Type
Removable
Service life
Renata 950 mAh
Yes, accessible from the outside
2½ years
1)
Model number
Short description
Batteries
0AC201.91
Lithium batteries, 4 pcs, 3 V, 950 mAh button cell
4A0006.00-000
Lithium battery, 1 pc., 3 V / 950 mAh, button cell
Table 33: Battery
1)
At 50°C, 8.5 µA of the supplied components and a self-discharge of 40%.
Battery status evaluation
The status of the battery is determined immediately after the device is started and subsequently checked by the
system every 24 hours. During this measurement, the battery is subjected to a brief load (approximately 1 second)
and then evaluated. Once determined, the battery status is displayed in BIOS (under Advanced -> OEM features
-> System board features -> Voltage values) and in the B&R Control Center (ADI driver); it can also be read in a
customer application using the ADI library.
Battery status
Description
N/A
The hardware or firmware being used is too old and does not support reading the battery status.
GOOD
Data buffering is intact.
BAD
From the point when battery capacity is recognized as insufficient (BAD), data buffering is intact for approximately another 500
hours
Table 34: Battery status
From the point when battery capacity is recognized as insufficient, data buffering is intact for approximately another
500 hours When replacing the battery, data is buffered for approximately 10 minutes by a gold leaf capacitor.
