Siemens SINUMERIK ONE NCU 1740 - X2 Profinet

12.2.3.3 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 12-16 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 speci󹪝cation
Table 12-17 Cable speci󹪝cation 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 12-18 PROFINET ports LED displays
Name Color Status Meaning
Link Green lit Transfer rate 100 Mbit/s
o󹪜 No or faulty connection
Connectable components
12.2 PP 72/48D PN
NCU 1740
Equipment Manual, 10/2021, A5E51087503B AA 117