Beckhoff CX20 2 Series, Manual

Page: 27 / 77

Description of the interfaces
CX20x2 27 Version: 1.7
5.4.6 PROFIBUS (x310)
Pin 6 transfers 5 V
DC,
pin 5 transfers GND for the active termination resistor. These must never be used for
other functions, as this can lead to destruction of the device.
Pins 3 and 8 transfer the PROFIBUS signals. These must never be swapped over, as this will prevent
communication.
Fig. 17: PROFIBUS interface X310 with pin numbering.
The Profibus bus line is connected via a 9-pin D sub with the following pin assignment:
Table 19: PROFIBUS interface X310, pin assignment.
Pin Assignment
1 Shielding
2 not used
3 RxD/TxD-P
4 not used
5 GND
6 +5 V
DC
7 not used
8 RxD/TxD-N
9 not used
Table 20: Wire colors of the PROFIBUS line.
PROFIBUS line D sub
B red Pin 3
A green Pin 8
For the optional PROFIBUS interface (x310), documentation with further information is available for
download from the Beckhoff website:
https://www.beckhoff.de/german/download/epc.htm?id=71003127100362
Document name
CXxxx0-x310 optional Profibus interface.