Siemens SCALANCE X-400 Operating Instructions Manual page 97

The maximum segment length of 100 m also applies when using the FastConnect
cabling with TP cord. Normally, FastConnect cable with a length of 90 m is used.
The remaining 10 m is then available for TP cord at both ends (total of 10 m).
Figure 6-16
Operating Instructions for SCALANCE X-400 Industrial Ethernet Switches
C79000-G8976-C186-03
FastConnect Cabling
A1 TP Cord 4x2
A2 TP Cord 4x2
B IE FC Standard Cable 4x2
Installation and Commissioning
97