6.5 Serial interface
Information on the serial interface
• Via the serial interface on the device (RJ-11 jack), you can access the CLI of the device directly
via an RS-232 (115200 8N1) connection without assigning an IP address.
• Access to the device is also possible independent of the Ethernet ports.
• To connect the serial interface to the PC, you require a cable with an RJ-11 plug and 9-pin D-
sub female connector. The connecting cable for the serial interface ships with the device and
can also be ordered as a spare part.
Position and assignment
Figure 6-3 Position and pin assignment of the serial interface (RJ-11 jack) on the SCALANCE XM-400
and the pin assignment of the D-sub female connector.
Assignment of the terminal block
The supplied connecting cable has the following assignment:
Contact Pin assignment of the RJ-11 plug Pin assignment of the D-sub female con‐
nector
1 - -
2 - TD (Transmit Data)
3 TD (Transmit Data) RD (Receive Data)
4 SG (Signal Ground) -
5 RD (Receive Data) SG (Signal Ground)
6 - -
7 -
8 -
9 -
Connecting up
6.5 Serial interface
SCALANCE XM-400
Operating Instructions, 03/2021, C79000-G8976-C306-10 61
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