Network Structures: Ring; Network Structures: Star - ABB EDS500 Series Manual

System concept
3.2.2

Network structures: Ring

Control staon
Control
system
Eth
Cu
1
LWL
Figure 2: Example for network structure: Ring
Automatic redundancy: each station can be reached via two routes.
3.2.3

Network structures: Star

Staon 1
RTU
Eth
1
Staon 4
RTU
Eth
1
Figure 3: Example of network structure: Star
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.
1KGT150966 V000 1
Staon 1 Staon 2
RTU RTU
Eth Eth
Cu
2 2
Staon 6 Staon 5
RTU RTU
Eth Eth
LWL
3 3
Control staon
Control
system
Cu
Eth
Eth
2 3
Cu
Legend:
Staon 3
1 500NMD11
2 500NMD02
RTU
3 500NMD20
Eth
Cu
1
Staon 4
LWL
RTU
Eth
LWL
3
Legend:
Staon 2
1 500NMD01
2 500NMD02
3 500NMD11
RTU
4 500NMD20
Eth
4
LWL
Staon 3
RTU
Cu Eth
1
Network structures
13