ABB AC 800M, Руководство пользователя

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Section 3 Fieldbus Topologies Point-to-Point Topology
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Point-to-Point Topology
Point-to-Point Topology means a connection and interaction of only two devices.
This topology is mostly used in sub-segments for example to connect HART devices
to Remote I/O. For the HART device the remote I/O operates as a master, however
the remote I/O is part of the PROFIBUS network. Point-to-Point connection in
PROFIBUS networks are not applicable, because it does not take advantage of the
multi-device-per-bus-segment capability.
Figure 14. Point-to-Point Topology