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5.3
Industrial Ethernet
NOTICE
The BusAdapter BA 2xRJ45VD HA can only establish a connection to another BusAdapter
BA 2xRJ45VD HA. The connection to a standard Ethernet connection is not possible.
NOTICE
Cable connection between two BusAdapters BA 2xRJ45VD HA
Use the same type of cable for the cable connection between two BusAdapters BA
2xRJ45VD HA. Infrastructure cables as well as patch cables in use must be of the same
type of cable.
If the cable type between the two BusAdapters changes during the transmission path,
signal reflections can occur at the connection site which can result in frame losses.
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.
R-45 connector technology
The attachment to Industrial Ethernet uses RJ-45 connected technology with MDI-X
assignment.
MDI / MDI-X autocrossover
With the MPI/MDI-X autocrossover function, the send and receive contacts of an Ethernet
port are assigned automatically. The assignment depends on the cable with which the
communications partner is connected. This means that it does not matter whether the port is
connected using a patch cable or crossover cable. 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 IE switch or accidental connection
over several IE switches causes an illegal loop. Such a loop can lead to network overload
and network failures.
SIMATIC BusAdapter
Operating Instructions, 06/2018, C79000-G8976-C472-01
Connection
5.3 Industrial Ethernet
27
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