Siemens SCALANCE X-400 Operating Instructions Manual page 25

Connections to other switches can use half or full duplex; connections to hubs are
possible only in half duplex mode.
Transmission medium
Data transmission at 10 Mbps and at 100 Mbps is over two wire pairs (pin 1, 2, 3,
6) of the twisted pair cable. For 10 Mbps, at least a category 3 (Cat 3) and for 100
Mbps, at least a four wire cable (2x2) is necessary.
Transmission range
The maximum transmission distance (segment length) is 100 m.
Connectors
The connectors used are 8-pin RJ-45 jacks with securing collars.
The securing collar in conjunction with the cover ensures a flush fit and the locking
mechanism with the PROFINET-compliant male connector IE FC RJ-45 Plug 180
provides a rugged node attachment suitable for an industrial environment that pro-
vides strain and bending relief for the RJ-45 jack.
Operating Instructions for SCALANCE X-400 Industrial Ethernet Switches
C79000-G8976-C186-03
System Description of SCALANCE X-400
25