External Cmos Battery - Beckhoff CB3053 Manual

External CMOS Battery

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).
Name
Pin
1 BATT
2 GND
Beckhoff New Automation Technology CB3053
battery 3.3 volt
ground
Description
Chapter: Connectors
page 21