ABB 500NMD20 - Network Structures: Ring; Network Structures: Star

System concept Network structures
3.2.2 Network structures: Ring
Control staon Staon 1 Staon 2
Staon 3
Staon 6 Staon 5
Staon 4
Cu
Control
system
22
RTU RTU
RTU
1
Eth Eth
Cu
Eth
Eth
33
RTU RTU
RTU
3
Eth
LWL
Cu
Eth
Eth
LWL
1
LWL
LWL
Figure 2: Example for network structure: Ring
Legend:
1 500NMD11
2 500NMD02
3 500NMD20
Automatic redundancy: each station can be reached via two routes.
3.2.3 Network structures: Star
Control staon
Staon 1 Staon 2
Staon 4
Staon 3
41
RTU RTU
RTU
1
Eth
Eth Eth
Eth
RTU
1
Eth
2
LWL
3
Eth
Cu
Cu
Cu
Control
system
Figure 3: Example of network structure: Star
Legend:
1 500NMD01
2 500NMD02
3 500NMD11
4 500NMD20
Central station: coupling EDS500 devices with back-to-back-connection of Ethernet ports.
Station 2: the 500NMD20 device is equipped with just one optical SFP.
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