BECKHOFF CB4053 - Manual (Page 39)

Fan Chapter: Connectors
Beckhoff New Automation Technology CB4053 page 39
4.18 Fan
A 3 pin connector is available for controlling and monitoring an external fan (5 volt). For the monitoring the
fan must provide a corresponding speed signal.
Pin Name Description
1 GND ground
2 FANON2 5 volt supply (switched)
3 FANCTRL2 fan monitoring signal