Clipsal C-Bus Especificações descarregar pdf (Página 25)

1A. Introduction to C-Bus

9.0 C-Bus Multi Network Installations

A C-Bus system cannot be expanded past a certain point without the inclusion of a C-Bus Network

Bridge. A bridge splits the installation into separate networks, which are electrically isolated from each

other. It can be programmed to allow communication between networks.

A bridge must be added whenever the current requirement (or the number of units) exceeds the

C-Bus limit, or when the total length of Cat-5 cable exceeds 1 km.

Cross-network communication between units (across a bridge) is determined by programming. It can

be allowed in both directions, in one direction only, or not at all. Regardless of what this is set to, an

operator scanning the network from their PC will be able to see every network connected to a C-Bus

system.

Since a bridge provides electrical isolation between networks (using galvanic separation), power

supplies cannot be shared across this connection. This also means that a separate network burden is

required for each network.

9.1 Maximum Number of Networks

Up to 255 C-Bus networks can be connected using C-Bus Network Bridges. Various topologies can

be employed when connecting the C-Bus networks. There are three types of connection topologies:

• star conguration

• daisy chain conguration

• a combination of star and daisy chain congurations.

An example of a multiple network connected using a star conﬁguration is shown in Figure 13.

Figure 13 – Example of a multiple network connected using a star conﬁguration

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