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4.5 Fieldbus topology
4.5.1
Structure of the fieldbus
The structure of the PROFINET network is flexible. All types of network structures
are supported (linear bus, star or ring structures).
For the use in a
linear bus structure
the PROFINET cable is looped from one to
the next device.
For the use in a
star structure
, the PROFINET cable is connected to Port 1. Port
2 is left open in this case. An additional PROFINET switch is required
For the use in a
ring structure
, the cable is looped from one to the next device,
but the last device will close the ring with a cable link to the first device. In this case
the controller and devices must have at least PROFINET conformance class B.
The cable link has a redundant path.
Con-
trol-
ler
De-
vice 1
De-
vice 2
De-
vice n
Con-
trol-
ler
De-
vice 1
De-
vice 2
De-
vice n
PROFINET
switch
De-
vice 2
De-
vice 1
Con-
trol-
ler
De-
vice n
Summary of Contents for RE-46
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