
Configuring Networks
3-15
SIMATIC NET Twisted-Pair and Fiber-Optic Networks
C79000-G8976-C125-02
Checking the example:
Node 1 --> Node 2 Delay Equivalent Variability Value
Node 1 140 m 0 BT
OLM 1 (ITP/FO) 360 m 6 BT
OLM 2 (FO/FO) 260 m 3 BT
OLM 3 (FO/ITP) 360 m 6 BT
ELM 1 (ITP/AUI) 190 m 3 BT
Transceiver 10 m 3 BT
Transceiver 10 m 3 BT
ELM 2 (AUI/ITP) 190 m 3 BT
OLM 4 (ITP/FO) 360 m 6 BT
OLM 5 (FO/FO) 260 m 3 BT
Mini OTDE 100 m -
Totals 2240 m 36 BT
Remaining values 2280 m 4 BT
The table indicates that the configuration planned in the example is correct and
that a cable length of 2280 m remains for networking the components.
Notes:
S Each further network component increases the PVV and reduces the remaining
cable length.
S When cascading OLMs and ELMs using twisted-pair, make sure that you use a
crossover cable (cable with XP identifier). This is available in lengths from 2 to
100 meters. For further information and ordering data, refer to the chapter
“Passive Components for Electrical Networks”.
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