Electrical Connections; Electrical Attachments To Industrial Ethernet - Siemens SCALANCE X-200 Operating Instructions Manual

5.6.1

Electrical connections

Note
Strain relief for the Ethernet cables
In order to avoid mechanical stress on the Ethernet cables and resulting interruption of the
contact, fasten the cables at a short distance from the connector using a cable guide or
busbar.
5.6.1.1

Electrical attachments to Industrial Ethernet

Connection via RJ-45 jacks
The electrical connectors for Industrial Ethernet on the X-200 IE switch are designed as RJ-
45 jacks with the following properties:
● MDI-X assignment
● Autonegotiation
● Auto polarity exchange
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.
SCALANCE X-200
Operating Instructions, 02/2018, C79000-G8976-C284-12
Connecting up
5.6 Attachment to Industrial Ethernet
69