Siemens X-400 - Manual (Page 29)

System Description of SCALANCE X-400
Operating Instructions for SCALANCE X-400 Industrial Ethernet Switches
C79000-G8976-C186-03
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2.2.4 1000Base-SX
Transmission Rate
The transmission rate of the optical gigabit ports is 1 Gbps.
Transmission Mode
Transmission with 1000Base-FX is defined in the IEEE 802.3z standard and is
specified as 1000 Mbps transmission rate and full duplex.
Transmission Medium
Data is transmitted over multimode FOC. The wavelength is 850 nm.
The core diameter of the multimode FOC is 50 µm; the light source is an LED.
Many modes (light beams) are used for signal transmission. The propagation times
of the light pulses (dispersion) restrict the maximum range considerably.
Transmission Range
The maximum transmission range (segment length) is 750 m when using SIMATIC
NET fiber-optic multimode FOC with SC duplex connectors.
Connectors
SC duplex female connectors are used.