Siemens SINAMICS V90 Operating Instructions Manual page 121

Wiring
The maximum length of cables between stations (L1 to Ln) is 100 m. For a long cable, you
are recommended to fix it on the cabinet to prevent the connector damage caused by
dragging.
Note
When connecting the ports P1 and P2, you need to make sure that the physical input and
output connections are the same with the connections in the topology.
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 04/2017, A5E37208830-003
Connecting
4.8 PROFINET interface - X150
121