Festo CPX-2AA-U-I, Electronic Manual

Page: 27 / 228

1. Overview and connection technology I/O modules
1−9
Festo P.BE−CPX−AX−EN en 0503b
1.2.3 Connecting the cables and plugs to the sub−bases
Sensors and actuators must be connected to the CPX I/O
modules only at the sub−bases. In this way, e.g. when an elec
tronic module is replaced, the plugs and cables remain fitted
in the sub−base.
W a r nin g
Sudden unexpected movement of the connected actuators
and uncontrolled movements of loose tubing can cause
injury to human beings or damage to property.
Before carrying out installation and maintenance work,
switch off the following:
the compressed air supply
the operating and load voltage supplies.
The protection class of the I/O modules depends on the
sub−base, as well as on the plugs and protective caps used.
Instructions can be found on the following pages and in
appendix A.5.
Use plugs and cables from the Festo range for connecting
sensors and actuators (see appendix A.8).
If you wish to use your own cables, use only screened/
shielded cables for transmitting analogue signals.
Cauti o n
Long signal cables reduce the immunity to interference.
Do not exceed the maximum permitted I/O signal cable
length of 30 m.