Specifications

Description
3.3 System description of SCALANCE X-400
SCALANCE X-400 BA
28 Operating Instructions, 03/2009, C79000-G8976-C186-07
● 100Base-TX full duplex
● 100Base-TX half duplex
● 10Base-T full duplex
● 10Base-T half duplex
Two communication modes are possible:
● Half duplex
Two-way alternate transmission mode - it is only possible to either send or receive over
the interfaces at any one time.
● Full duplex mode
Two-way simultaneous - both communication partners can send and receive at the same
time.
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 (2x2) category 5 (Cat 5) cable is necessary.
Transmission range
The maximum transmission range (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 connectors IE FC RJ-45 Plug 180 and IE FC_RJ-45 Plug 145
provides a rugged node attachment suitable for an industrial environment that provides strain
and bending relief for the RJ-45 jack.
3.3.2.2 1000Base-TX
Transmission rate
The transmission rate of the electrical gigabit ports is 1 Gbps.
Transmission mode
The transmission mode for 1000Base-TX is specified in the IEEE 802.3ab standard.
At 1 Gbps, autonegotiation is optional.
Two communication modes are possible: