Bus Structure - Siemens ESM Operating Instructions Manual

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.
PC
3
1 Fiber-optic cable (FOC)
3 TP cord 9/RJ-45
4 ITP standard cable 9/15
Figure 10: Bus with OSM
Industrial Ethernet OSM/ESM
C79000-Z8976-C068-10
S7-400
4
OSM OSM
ITP 62 ITP 62
1
Network Topologies with OSM/ESM
4
OSM TP 62
1 1
S7-300 S7-400
4
OSM ITP 62
OSM ITP 53
1
29