Siemens SIMATIC S7-1500 Manual page 30

Connecting up
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
Note
You need a screwdriver (max. blade width 2.5 mm) to remove the PROFINET plug.
Reference
You can find additional information on the topics of "Connecting the CPU" and
"Accessories/spare parts" in the S7-1500, ET 200MP
(http://support.automation.siemens.com/WW/view/en/59191792) system manual.
30
PROFINET ports
CPU 1511-1 PN (6ES7511-1AK02-0AB0)
Manual, 12/2017, A5E40869673-AA