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Network Topologies with OSM/ESM

Industrial Ethernet OSM/ESM

C79000-Z8976-C068-10

ESM in

RM mode

ESM ITP 80 ESM ITP 80 ESM ITP 80

ESM ITP 80

ESM ITP 80 ESM ITP 80 ESM ITP 80

ESM ITP 80

2 ITP XP standard cable 9/9

22 2

2 2 2

Figure 13: Redundant Ring Structure with ESMs

Notes

• The reconfiguration time of less than 0.3 s can only be achieved when no

components other than OSMs and ESMs (for example switches) are used in

the redundant ring.

• In a ring, one device and one device only must operate in the redundancy

manager mode.

• DTEs or complete network segments can be connected to ports 1 – 6

(OSM/ESM with 8 ports) or ports 1 and 2 (OSM/ESM with 4 ports) of an

OSM/ESM operating in the RM mode.

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