ABB 500FSD10, Руководство пользователя

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System concept Functions overview
3.2.5 RTU560 integration
All products of the EDS500 series - FSK modems are also available as plugin modules for
RTU560.
3.3 Network structures
Devices of the EDS500 series allow you to realize a wide variation of network structures like
point-to-point connections, lines, stars and branches. The following small examples should
give an overview of possible network variants.
3.3.1 Line topology
A line topology usually follows the physical path of an infrastructure installation, e.g.
an energy line or pipeline. 500FSD analog modems realize a line topology by physically
connecting all modems to the same copper cable via two or four wires. In this so called
partyline or multidrop configuration the application protocol provides a polling scheme to
query and control the different stations.
500FSDxx
Control center Staon 1 Staon 2 Staon 3
500FSDxx 500FSDxx 500FSDxx
Cu
RTU/IED
RTU/IED
RTU/IED
Figure 1: Line topology
3.3.2 Point-to-point topology
Point-to-point connections can be used if possible by the physical environment or if high
throughput is required. The point-to-point connection can utilize either two or four wires.
In four wire mode the connection can be operated full-duplex allowing symmetric protocols
to be used (e.g. symmetric IEC 60870-5-101). If two wires are used, full-duplex operation can
be achieved by using 500FSD20 and frequency-separated channels in transmit and receive
direction.
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