11.2.3.3 X2 PROFINET
Data Transmission Rate and Cables
For PROFINET, you require a data transmission rate of 100 Mbit/s (Fast Ethernet). The
interfaces are designed for full-duplex mode; in other words, the ports can both transmit and
receive. For data transfer purposes you can use electrical twisted copper cables (twisted pair,
4-wire, 100Base-T):
● The transmission characteristics of these cables must meet the requirements of CAT5.
● The maximum length of the connections between the end device and network component
or between two network components (e.g. switch ports) must not exceed 100 m.
Pin assignment
Table 11-16 PROFINET interfaces X2, ports 1, 2
Pin Signal name Signal type Meaning
1 TX+ O Transmit data +
2 TX- O Transmit data -
3 RX+ I Receive data +
4 N.C. - Reserved, do not use
5 N.C. - Reserved, do not use
6 RX- I Receive data -
7 N.C. - Reserved, do not use
8 N.C. - Reserved, do not use
Cable specification
Table 11-17 Cable specification at X2, ports 1, 2
Characteristic Version
Connector type RJ45 socket
Cable type Industrial Ethernet cable (as of CAT5)
Max. cable length 100 m
LED displays
For diagnostic purposes, the RJ45 sockets are each equipped with a green and a yellow LED.
This allows the following information to be displayed for the respective PROFINET port:
Table 11-18 PROFINET ports LED displays
Name Color Status Meaning
Link Green lit Transfer rate 100 Mbit/s
off No or faulty connection
Connectable components
11.2 PP 72/48D PN
NCU 1760
Equipment Manual, 02/2020, A5E45627861B AB 111
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