Transmission mode
The transmission mode for 100Base-LX is specified in the IEEE 802.3 standard.
Since the full duplex mode and the transmission rate cannot be modified for optical
transmission, autonegotiation cannot be used.
Transmission medium
Data transmission is over single-mode fiber-optic cable (FO cable). The transceiver wavelength
is 1310 nm. The FO cables are compatible with single-mode FO cables with 1300 nm.
Single-mode fiber-optic cables with a core diameter of 9 µm are used. The outer diameter of the
FOC is 125 µm.
Sender
The light source is an "eye safe" class 1 laser with a wavelength of 1310 nm.
Range
The maximum transmission range (segment length) is 26 km for a signal attenuation of the fiber-
optic cable of ≤ 0.5 dB/km.
Connectors
The cables are connected to SC sockets.
4.5.5
SCALANCE XB004-1G
Transmission rate
The transmission rate of the optical Fast Ethernet port is 1000 Mbps.
Transmission mode
The transmission mode for 1000Base-SX is specified in the IEEE 802.3z standard.
Since the full duplex mode and the transmission rate cannot be modified for optical
transmission, autonegotiation cannot be used.
Transmission medium
Data transmission is over multimode fiber-optic cable (FOC). The wavelength is 850 nm.
Multimode fiber-optic cable with a core diameter of 50 µm is used. Fiber-optic cables with a core
diameter of 62.5 µm are not recommended for 1000Base-SX because this reduces the maximum
segment length drastically.
Description of the device
4.5 FO port (fiber optic)
SCALANCE XB-000
Operating Instructions, 01/2022, A2B00077300-11
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