Handling The Clamping Unit Or Brake - Festo CPX Series Manual

3. Drive functions

3.1.5 Handling the clamping unit or brake

3−12
On the VPWP there is a digital output available for controlling
a clamping unit or brake.
No clamping unit/brake configured
No clamping unit has been configured in the factory settings
(PNU 1143:03 = 0). The digital output on the VPWP always
delivers 0 V.
Clamping unit/brake configured
If a clamping unit is configured (PNU 1143:03 = 1), the
clamping unit is controlled exclusively by the control bit
CCON.BRAKE, i.e. the clamping unit is always controlled only
by the PLC. The CMAX never switches the VPWP output by
itself.
Note
For the CMAX to have a correct control function, it is im
perative that the clamping unit or brake be connected with
the following logic (see also CMAX system description):
Pin 2: 0 V = clamping unit/brake closed
Pin 2: 24 V = clamping unit/brake open.
Festo P.BE−CPX−CMA X−CONTROL−EN en 0908NH