Siemens ESM - Manual (Page 43)

Network Topologies with OSM/ESM
Industrial Ethernet OSM/ESM
C79000-Z8976-C068-10
39
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.
2 2
Port 1 Port 1
OSM OSM OSM
OSM OSM
OSM
ITP 62
OSM
ITP 62
OSM
ITP 62
1 Fiber-optic cable (FOC)
2 ITP XP standard cable 9/9
OSM in
RM mode
Ring with OSM
version 2
Ring with OSM
version 1
1
1 1
1
1 1
2
Port 2 Port 2
Port 1 Port 1
Standby
master Standby
slave
Figure 18: Redundant Ring Coupling with OSM V1 as Standby Master/Standby Slave