Siemens Simatic S7-1500 Equipment Manual - Page 31

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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).

PROFIBUS interface X3

The table below shows the pin assignment of the PROFIBUS interface. The assignment

corresponds to the standard assignment of an RS485 interface.

Table 4-2 PROFIBUS interface pin assignment

View

Figure

NOTE

Supply of I/O devices

The CPU 1517T‑3 PN/DP does not provide a 24 V DC power supply on the PROFIBUS interface.

I/O devices (for example, PC adapter USB) are therefore only operational on the interface in

conjunction with a plug-in power supply set for external power supply.

The innovative successor product, PC adapter USB A2, receives the required power supply via

the USB port. The USB A2 PC adapter therefore does not require a 24 V DC supply voltage and

can be operated without a plug-in power supply set for external power supply.

Reference

You can find additional information on the topics of "Connecting the CPU" and

"Accessories/spare parts" in the S7-1500, ET 200MP

(https://support.automation.siemens.com/WW/view/en/59191792) system manual.

Assignment of the MAC addresses

CPU 1517T‑3 PN/DP has two PROFINET interfaces. The first interface has two ports. The

PROFINET interfaces each have a MAC address, and each of the PROFINET ports has its own

MAC address. In total, the CPU 1517T‑3 PN/DP has five MAC addresses.

CPU 1517T-3 PN/DP (6ES7517-3TP00-0AB0)

Equipment Manual, 11/2022, A5E36285525-AD

Signal name

RxD/TxD-P

Data line B

RTS

Request to send

M5V2

Data reference potential (from station)

P5V2

Supply plus (from station)

RxD/TxD-N

Data line A

Wiring

Description