Siemens SIMATIC S7-1200

Technical specifications
A.15 BB 1297 Battery board
S7-1200 Programmable controller
1528 System Manual, V4.2, 09/2016, A5E02486680-AK
A.15
BB 1297 Battery board
BB 1297 Battery Board
The S7-1200 BB 1297 Battery Board is designed for long-term backup of the Real-time
clock. It is pluggable in the signal board slot of the S7-1200 CPU (firmware 3.0 and later
versions). You must add the BB 1297 to the device configuration and download the
hardware configuration to the CPU for the BB to be functional.
The battery (type CR1025) is not included with the BB 1297 and must be purchased by the
user.
Note
The BB 1297 is mechanically designed to fit the CPUs with the firmware 3.0 and later
versions.
Do not use the BB 1297 with earlier version CPUs as the BB 1297 connector will not plug
into the CPU.
WARNING
Installing an unspecified battery in the BB 1297, or otherwise connecting an unspecified
battery to the circuit can result in fire or component damage and unpredictable operation of
machinery.
Fire or unpredictable operation of machinery can result in death, severe personal injury, or
property damage.
Use only the specified CR1025 battery for backup of the Real-time clock.
Table A- 237 General specifications
Technical data
BB 1297 Battery Board
Article number
6ES7297-0AX30-0XA0
Dimensions W x H x D (mm)
38 x 62 x 21
Weight
28 grams
Power dissipation
0.5 W
Current consumption (SM Bus) 11 mA
Current consumption (24 V DC)
none
Battery (not included)
BB 1297 Battery Board
Hold up time
Approximately 1 year
Battery type CR1025 Refer to Installing or replacing a battery in the BB
1297 battery board (Page 63)
Nominal voltage
3 V
Nominal capacity
At least 30 mAH