Type büS

Getting to know the büS topologies

16

5.3.3

Star topology

A star topology is used to interconnect devices when space is limited and a setup with a daisy chain topo-

logy is not possible.

Stub

Junction box

Device 3

Device 1

Device n

Device 2

Fig. 11: Star topology

5.4

Which topologies are NOT recommended?

The topologies in this chapter are possible, but various criteria have to be observed to ensure the network

works properly.

5.4.1

Tree topology

For signal quality, it is not recommended to use a tree topology. Cascading of the passive junction boxes is

restricted to three. If more devices are needed, it is necessary to interconnect the trunk lines of the passive

junction boxes and to not cascade more than three devices. Otherwise, the maximum stub line length is ex-

ceeded and errors may occur.

Stub

Junction box 1

Device 3

Device 1

Device n

Device 2

Junction box 2

Junction box n

Fig. 12: Tree topology