Festo CPX-CMAX - Earthing

4 Electrical installation
40 Festo – P.BE-CPX-CMAX-SYS-EN – en 2017-09b – English
4.2 Earthing
CMAX earthing is provided via the CPX terminal (è CPX system description).
 Observe the earthing measures described in the following – depending on the components used.
Note
Malfunctions can occur through incorrect or lack of earthing.
 Connect the specified connections to the earth potential with low resistance and low
impedance.
Unless otherwise specified, the earthing conductors must have:
– cable cross section of at least 2.5 mm
2
– a cable length as short as possible (typically 20 ... 30 cm)
Earthing VPWP proportional directional control valve
 Connect the earth terminal (è Labelling on product) with low resistance and low impedance to the
earth potential of the CPX terminal. To do this, use the supplied self-tapping screw.
Earthing sensor interface
 Connect the earth terminal with low resistance and low impedance to the earth potential of the CPX
terminal.
Drive/displacement encoder earthing
 Connect the earth terminal with low resistance and low impedance to the earth potential.
Drive Displacement encoder Position of the earth terminal
DDLI Integrated Drive
1)3)
DDPC Drive
2)3)
DGCI Permanently attached Displacement encoder
– Flat pin (nominal size [mm]: 4.8 - 0.8)
DNCI Integrated Drive
2)3)
DNC External (MLO-POT-...-LWG) Displacement encoder
– flat pin (earthing strip included in the scope of delivery)
DSMI Integrated Drive
1) The female thread of the cover screws are suitable for cabling to the earth potential.
2) Use the supplied self-tapping screw. This ensures electrical contact is established in spite of the anodising layer.
3) Alternatively: Mount the drive on an earthed machine bed.
Tab. 4.1 Earthing notes