BECKHOFF CB3053 - Manual (Page 19)

External CMOS Battery Chapter: Connectors
Beckhoff New Automation Technology CB3053 page 19
4.5 External CMOS Battery
For keeping the internal clock alive even if the rest of the board is switched off, an external battery can be
attached via a 2 pin connector (JST B2B-EH-A, mating connector: EHR-2).
Pin Name Description
1 BATT battery 3.3 volt
2 GND ground