Technical data • Complete system
Chapter 2
Technical data
Automation PC 3100 user's manual V0.60
37
2.5.11 Battery
The lithium battery (3 V, 950 mAh) ensures power to the internal real-time clock (RTC). It is located behind the
orange cover above the power and reset buttons. The battery's self-discharge time is at least 4 years (at 50°C,
8.5 μA for the components being supplied and self-discharge of 40%). If an SRAM interface option is installed,
the service life is 2½ years. The battery is subject to wear 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
4 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
Reset
Power
Battery
Battery
Table 27: Battery
1)
At 50°C, 8.5 µA for the components being supplied and self-discharge of 40%. If an SRAM interface option is installed, the service life is 2½ years.
The battery state is determined immediately by the system after the device is switched on and then every 24 hours.
During the measurement, the battery is subjected to a brief load (approximately 1 second) and then evaluated. The
determined battery state is displayed in the BIOS Setup screens (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 state
Explanation
N/A
The hardware or firmware being used is too old and does not support reading the battery state.
GOOD
Retention of data is ensured.
BAD
From the point when battery capacity is detected as BAD (insufficient), retention of data is ensured for approximately another
500 hours.
Table 28: Explanation of the battery state
From the point when battery capacity is detected as insufficient, retention of data is ensured for approximately an-
other 500 hours. When replacing the battery, data is retained for approximately 10 minutes by a gold foil capacitor.
