Siemens ESM - Manual (Page 33)

Network Topologies with OSM/ESM
Industrial Ethernet OSM/ESM
C79000-Z8976-C068-10
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3.1 Bus Structure
With OSMs or ESMs, bus structures can be implemented . The cascading depth
and total span of a network are limited only by the monitoring times of the
communication connections. These times must always be set higher than the
signal delay of the transmission path.
OSM
ITP 62
OSM
ITP 62
OSM TP 62 OSM ITP 53
OSM ITP 62
1 Fiber-optic cable (FOC)
3 TP cord 9/RJ-45
4 ITP standard cable 9/15
1 1 1 1
3 4 4 4
PC
S7-400 S7-300 S7-400
Figure 10: Bus with OSM