Interface description
CX51x0
30
Version: 2.8
5.4.7
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. 15: PROFIBUS interface X310.
The Profibus bus line is connected via a 9-pin D sub with the following pin assignment:
Table 22: PROFIBUS interface X310, pin assignment.
Pin
Connection
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 23: 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.
