ABB 500NMD20 - Network Structures: Line with Branch; Network Structures: Redundant Point-To-Point Connection

Network structures System concept
3.2.4 Network structures: Line with branch
Control staon Staon 1
Staon 2
Staon 3
Staon 4
Staon 5
Cu
Control
2
1 1
RTU
RTU
RTU
1
Eth
Eth
Cu
Eth
Eth
2
RTU
RTU
1
Cu
Eth
Eth
Cu
2
Eth
Cu
system
Figure 4: Example for network structure: Line with
branch
Legend:
1 500NMD01
2 500NMD02
Station 1: coupling EDS500devices with back-to-back-connection of Ethernet ports.
As an alternative to SHDSL via copper lines transmission can use optical fibres. Use the
corresponding EDS500 devices.
It is possible to establish a branch at any point in ring structures and other structures.
3.2.5 Network structures: Redundant point-to-point connection
Control staon
Staon
Control staon
Staon
Cu
2
2
RTU
Eth
Eth
Cu
Cu
1
1
RTU
Eth
Eth
LWL
Control
system
Control
system
Figure 5: Example for network structure: Redundant
point-to-point connection
Legend:
1 500NMD02
2 500NMD20
Connections between stations can be designed as redundant routes with an additional line.
For this you can use copper lines for SHDSL as well as optical fibres. The automatic selection
of the best available transmission line leads to better operating security. (see EDS500 Manual
- Part 2: Spanning Tree Protocol)
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