Siemens SIMATIC S7-1500R/H Equipment Manual page 27

PROFINET interface X1 with 2-port switch (X1 P1R and X1 P2R)
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 4-1 Interface assignments
PROFINET interface X2 with 1 port (X2 P1)
The assignment corresponds to the Ethernet standard for a RJ45 connector.
Autocrossing is always active on X2. This means the RJ45 socket is allocated either as data
terminal equipment (MDI) or a switch (MDI-X).
H-Sync X3 interface with 1 port (X3 P1) and X4 with 1 port (X4 P1)
Make the redundancy connections between the two CPUs via the synchronization modules at
the X3 P1 and X4 P1 interfaces (LC sockets). You interconnect the CPUs in pairs via the fiber-
optic cables.
①
②
Figure 4-2 Interface assignments
CPU 1517H-3 PN (6ES7517-3HP00-0AB0)
Equipment Manual, 11/2022, A5E42011886-AD
Without synchronization module
With synchronization module and removed dummy plug
Connecting
4.1 Terminal assignment
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