Siemens ESM Operating Instructions Manual page 43

Redundant Coupling of Rings
In a redundant coupling of rings, make sure that the standby master and standby
slave are either both of the type OSM Version 1 or both of the type OSM Version 2.
Port 1
1
Port 1
Figure 18: Redundant Ring Coupling with OSM V1 as Standby Master/Standby Slave
Industrial Ethernet OSM/ESM
C79000-Z8976-C068-10
Port 1
OSM
Standby
master
2
Port 1
OSM
Port 2 Port 2
2
OSM
ITP 62
1 Fiber-optic cable (FOC)
2 ITP XP standard cable 9/9
Network Topologies with OSM/ESM
Ring with OSM
version 1
OSM
Standby
slave
OSM
2
OSM
ITP 62
1 1
Ring with OSM
version 2
OSM
1 1
OSM in
RM mode
OSM
ITP 62
1
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