Siemens SINUMERIK ONE NCU 1750 - Page 138

Pin Signal name Signal type Meaning
6 RX- I Receive data -
7 N.C. - Reserved, do not use
8 N.C. - Reserved, do not use
Cable speci󹪝cation
Table 12-38 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 12-39 PROFINET ports LED displays
Name Color Status Meaning
Link Green lit Transfer rate 100 Mbit/s
o󹪜 No or faulty connection
Activity Orange lit Data exchange
o󹪜 No data exchange
PROFINET address (S1)
A logical address can be assigned to the I/O module for communication with PROFINET using a
10-bit DIP switch S1.
Table 12-40 General settings with switch S1
1 2 3 4 5 6 7 8 9 10 Meaning
on on PROFINET functionality
on on on on on on on on DCP mode
The switch positions 9 and 10 guarantee the PROFINET functionality of the module and must
always be switched "on".
DCP mode
In this mode, there is no default device name.
The device name must be set using initialization and remains saved on the I/O module. It is 󹪝rst
deleted when the factory setting is restored, e.g. using STEP 7 (TIA Portal).
Connectable components
12.3 PP 72/48D PN 2/2A PN
NCU 1750
138 Equipment Manual, 01/2022, A5E45627807B AE