Siemens SIMATIC S7-1200

Technical specifications
A.3 PROFINET interface X1 port pinouts
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
1369
A.3
PROFINET interface X1 port pinouts
The S7-1200 CPU connects to the PROFINET network using a standard female RJ45 jack.
The connector pinout depends on the CPU type.
Single-port CPUs
Single-port CPUs (CPU 1211C, CPU 1212C and CPU 1214C) have a standard Ethernet MDI
pin configuration as follows:
Pin
Signal name
Description
RJ45 female jack pinout
1
TD+
Transmit data
2 TD-
3
RD+
Receive data
4 GND Ground
5
GND
6
RD-
Receive data
7
GND
Ground
8
GND
Dual-port CPUs
The ports of a dual-port CPU (CPU 1215C and CPU1217C) have a standard Ethernet MDI-X
pin configuration as follows:
Pin
Signal name
Description
RJ45 female jack pinout
1
RD+
Receive data
2
RD-
3
TD+
Transmit data
4
GND
Ground
5
GND
6
TD-
Transmit data
7
GND
Ground
8
GND
Autonegotiation
If the port’s configuration enables autonegotiation, the S7-1200 CPU automatically detects
the cable type and swaps the transmit/receive lines, if needed. If the port’s configuration
disables autonegotiation, the CPU also disables this automatic swap. You configure a port’s
autonegotiation setting in the TIA Portal’s port options dialog. This is a port-specific
advanced option for the PROFINET interface (X1) of the CPU’s properties. Refer to
"Configuring the PROFINET port" in Section 11.2.3.4: "Configuring an IP address for a CPU
in your project" (Page 814) for further information.