Siemens Simantic S7-1500 - PROFINET Interface X1 (2-Port Switch); PROFINET Interface X2 (1-Port)

Wiring
CPU 1517T-3 PN/DP (6ES7517-3TP00-0AB0)
30 Manual, 12/2017, A5E36285525-AB
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 3-2 PROFINET
PROFINET interface X2 with 1 port (X2 P1)
The assignment corresponds to the Ethernet standard for an RJ45 plug.
Autocrossing is always active on X2. This means the RJ45 socket is allocated either as data
terminal equipment (MDI) or a switch (MDI-X).