Field Bus Connection With Terminating Resistors - Festo CPX Series Manual

2 Installation as function module F24
Note
• Note that only the Festo sub-D plug guarantees compliance with protection class
IP65/IP67.
To comply with protection class IP65/IP67:
• Fit the DIL switch cover.
• Seal the service interface with the protective cap supplied.
• Use the Festo sub-D plug.
Connecting with sub-D plugs of other manufacturers
For connecting sub-D plugs of other manufacturers:
• Replace the two flat screws with bolts (type UNC 4-40/M3x6).
• Connect the cable screening to the plug housing.
2.5.5

Field bus connection with terminating resistors

Note
If the CPX terminal is at the beginning or end of the field bus system, a bus termination
is required.
• To terminate, use a bus terminal network on both ends of the fieldbus segment
( Fig. 2.4).
A resistor between Data A and Data B is used as a bus termination (depending on cable type,
Tab. 2.17).
1
Fieldbus plug from Festo
2
Connection for continuing field bus sealed
with a blanking plug
Fig. 2.7 Field bus connection
Festo – P.BE-CPX-FB23-24-EN – 1305a – English
1 2 3 4
3
Terminating resistor between DA and DB
4
Festo connection block
31