Description of the device
3.4 FO port (fiber optic)
SCALANCE X-100
Operating Instructions, 12/2016, A2B00060666-08
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The IE Switches SCALANCE X-100 all support the MDI / MDI-X autocrossover function.
Note that the direct connection of two ports or accidental connection over several switches
causes an illegal loop that can cause network overload and failure.
FO port (fiber optic)
Transmission speed
The transmission speed of the optical Fast Ethernet ports is 100 Mbps.
The transmission mode for 100Base-FX 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 selected.
Data transmission is over multimode fiber-optic cable (FO cable). The wavelength is 1310
nm.
Multimode fiber-optic cables are used with a core of 50 or 62.5 µm; the light source is an
LED.
The outer diameter of the FO cable is 125 µm.
The maximum transmission range (segment length) is as follows:
● with 62.5/125 µm fiber multimode SIMATIC NET cable: 4 km
● with 50.0/125 µm fiber multimode SIMATIC NET cable: 5 km
The cables are connected over BFOC sockets.
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