Pin assignment
The following table shows the pin assignment of the RJ-45 connectors:
Pin no.:
Assignment
8
n. c.
7
n. c.
6
TD-
5
n. c.
4
n. c.
3
TD+
2
RD-
1
RD+
Permitted cable lengths
• With connection using TP cords or TP-XP cords: maximum 10 m
• When connected using IE FC cable with IE RJ-45 plug:
Depending on the cable type, a total length of up to 100 m is permitted between two devices.
5.6.1.2
Electrical connectors of the X208PRO
Connection via M12 sockets
With the IE switch SCALANCE X208PRO, the connection to Industrial Ethernet is via 4-pin, d-
coded M12 sockets with MDI-X assignment.
MDI / MDI-X autocrossover function
The advantage of this function is that straight-through cables can be used throughout and
external Ethernet crossover cables are unnecessary. This prevents malfunctions resulting from
mismatching send and receive wires. This makes installation much easier for the user.
Note
Formation of loops
Please note that the direct connection of two ports on the switch or accidental connection over
several switches causes an illegal loop. Such a loop can lead to network overload and network
failures.
Connecting up
5.6 Attachment to Industrial Ethernet
SCALANCE X-200
Operating Instructions, 11/2021, C79000-G8976-C284-15
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