1000Base-Sx; 1000Base-Lx - Siemens SCALANCE X-400 Operating Instructions Manual

Description
3.3 System description of SCALANCE X-400
3.3.2.4

1000Base-SX

Transmission rate
The transmission rate of the optical gigabit ports is 1 Gbps.
Transmission mode
Transmission with 1000Base-SX 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
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.
3.3.2.5

1000Base-LX

Transmission rate
The transmission rate of the optical gigabit ports is 1 Gbps.
Transmission mode
Transmission with 1000Base-LX 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 single mode FOC. The wavelength is 1310 nm or 1550 nm.
The core diameter of the single mode FOC is 9 or 10 µm; the light source is a laser diode. To
transmit a signal, only one mode is used greatly reducing dispersion. As a result, the
maximum range of single mode FOC is greater than that of multimode FOC.
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Operating Instructions, 06/2015, C79000-G8976-C186-12
SCALANCE X-400