Description of the device
4.3 Interfaces and signaling contact of the switches
SCALANCE X-300
90 Operating Instructions, 05/2016, A5E01113043-20
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 (2 x 2) category 5 (Cat 5) cable is necessary.
The maximum transmission range (segment length) is 100 m.
A node or network segment is connected to an 8-pin RJ-45 jack with securing collar. Due to
its flush fitting with an IE FC RJ-45 Plug 180 / IE FC RJ45 Plug 145 connector, the securing
collar ensures a robust connection suitable for industry that provides tensile and bending
strain relief for the inserted connector.
-45 jacks of the SCALANCE X300EEC variants do not have a securing collar. The
tensile and bending relief are provided by the securing bracket using a cable binder, see also
section
Signaling contact (Page 145).
1000Base-T
Transmission rate
The transmission rate of the electrical Ethernet ports is 10 Mbps, as Fast Ethernet ports 100
Mbps or as gigabit ports 1 Gbps.
The transmission mode for 1000Base-T is specified in the IEEE 802.3ab standard.
Autonegotiation (automatic detection of the best transmission mode) is default.
The order in which they are selected is:
● 1000Base-T full duplex
● 1000Base-T half duplex
● 100Base-TX full duplex
● 100Base-TX half duplex
● 10Base-T full duplex
● 10Base-T half duplex
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