Technical specifications
A.6 BB 1297 battery board
Easy Book
310 Manual, 03/2014, A5E02486774-AF
BB 1297 battery board
BB 1297 Battery Board
Table A- 35 General specifications
Dimensions W x H x D (mm)
Hold up time real time clock
1
Indicating a battery replacement is needed
Application / system can evaluate battery status
Refer to the S7-1200 Programmable Controller System Manual, Chapter 2, Installation for information about installing
the BB 1297 or replacing a battery in the BB.
The BB 1297 Battery board is used for applications where the real time clock retention time
is beyond one month. Features of the BB 1297 Battery board are shown below:
● Supports time of day clock during PLC power off. The S7-1200 CPU, in combination with
the BB 1297 Battery board, supports the Time of Day clock retention during a power off
period of the application for up to one year.
● Only one BB 1297 Battery board or other SB can be used at a time.
● Hot plugging / hot swapping is not allowed. The BB 1297 Battery board is only
exchangeable or pluggable while the CPU is powered off. While the CPU is powered off,
and the BB 1297 is removed to exchange the actual battery, the internal super cap will
hold the time of day while the user replaces the battery.
● The CPU "Maint" LED indicates when a replacement battery is needed.
● The user program allows you to monitor or check on the status of the battery, and battery
board and allows a user message to be displayed on an HMI or web server.
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