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Connecting
3.1 Terminal assignment
PROFINET interface X1 with 2-port switch (X1 P1 R and X1 P2 R)
The assignment corresponds to the Ethernet standard for an RJ45 plug.
• When autonegotiation is deactivated, the RJ45 socket is allocated as a switch (MDI-X).
• When autonegotiation is activated, autocrossing is in effect and the RJ45 socket is
allocated either as data terminal equipment (MDI) or a switch (MDI-X).
Figure 3-1
PROFINET interface X2 with 1 port (X2 P1) and X3 with port (X3 P1)
The assignment corresponds to the Ethernet standard for a RJ45 connector.
Autocrossing is always active on X2 and X3. This means the RJ45 sockets are allocated either
as data terminal equipment (MDI) or a switch (MDI-X).
Figure 3-2
24
Interface assignment X1
Interface assignment X2, X3
CPU 1518HF-4 PN (6ES7518-4JP00-0AB0)
Equipment Manual, 05/2021, A5E49868646-AA
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