Siemens S7-1200 System Manual page 59

Table 3- 5 Removing an SB, CB or BB 1297
Task
Installing or replacing the battery in the BB 1297 battery board
The BB 1297 requires battery type CR1025. The battery is not included with the BB 1297
and must be purchased. To install or replace the battery, follow these steps:
1. In the BB 1297, install a new battery with the positive side of the battery on top, and the
2. The BB 1297 is ready to be installed in the CPU. Follow the installation directions above
To replace the battery in the BB 1297:
1. Remove the BB 1297 from the CPU following the removal directions above.
2. Carefully remove the old battery using a small screwdriver. Push the battery out from
3. Install a new CR1025 replacement battery with the positive side of the battery on top and
4. Re-install the BB 1297 battery board following the installation directions above.
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
negative side next to the printed wiring board.
to install the BB 1297.
under the clip.
the negative side next to the printed wiring board.
Procedure
1. Ensure that the CPU and all S7-1200 equipment are disconnected
from electrical power.
2. Remove the top and bottom terminal block covers from the CPU.
3. Place a screwdriver into the slot on top of the module.
4. Gently pry the module up to disengage it from the CPU.
5. Remove the module straight up from its mounting position in the top
of the CPU.
6. Replace the cover onto the CPU.
7. Replace the terminal block covers.
3.3 Installation and removal procedures
Installation
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