
Configuring Networks
3-4
SIMATIC NET Twisted-Pair and Fiber-Optic Networks
C79000-G8976-C125-02
SIMATIC NET Glass Fiber-Optic Cables
The SIMATIC NET product range for Industrial Ethernet includes various types of
glass fiber-optic cables with 62.5/125 µm fibers (see “Passive Components for
Optical Networks”).
When connecting SIMATIC NET Industrial Ethernet network components linked
with SIMATIC NET glass fiber-optic cables, the maximum length of the link is
limited as shown in the table below:
Table 3-1 Maximum length of a link with fiber type G 62.5/125 µm between two optical
network components complying with 10BASE-FL (850 nm)
Fiber-Optic Cables FO power loss
At 850 nm
Available budget Max. length
Standard fiber-optic cable <=3.1 dB/km 11 dB 3,500 m
INDOOR fiber-optic
cable
<=3.5 dB/km 11 dB 3,100 m
Flexible fiber-optic
trailing cable
<=3.1 dB/km 11 dB 3,500 m
SIENOPYR duplex FO marine
cable
<=3.1 dB/km 11 dB 3,500 m
3.1.2 Industrial Twisted Pair Links
A twisted pair link is limited to a maximum of 100 m. This link can include a
maximum of 10 m patch cable (TP Cord). This can be implemented with the
following SIMATIC NET twisted-pair cables:
Table 3-2 Max. Cable Lengths with Twisted-Pair Cables
Cable Structure Cable Type Max.
length
Max. Total of the Patch
Cables (TP Cord)
In one piece ITP standard 2x2
(with sub-D
connectors)
100 m –
Structured FC standard cable
FC trailing cable
FC marine cable
(connected to RJ-45
FC outlet)
90 m
75 m
75 m
10 m
10 m
10 m
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