Clipsal C-Bus Specifications download pdf (Page 17)

1A. Introduction to C-Bus

4.4 Which Wires to Use

In order to maintain noise immunity, the natural twist between pairs must be retained when connecting

to the positive and negative C-Bus terminals.

It is important that the following Cat-5 conductors are used when making C-Bus connections:

• orange + blue for positive C-Bus Wires

• orange & white + blue & white for negative C-Bus Wires.

Figure 8 shows correct wiring that maintains the natural twist of the C-Bus cable conductor pairs.

Figure 8 – Correct pairing of C-Bus conductors

Figure 9 shows incorrect pairing of conductors. This increases the C-Bus network’s susceptibility to

electrical interference.

Figure 9 – Incorrect pairing of C-Bus conductors

IMPORTANT Using the correct pairing while maintaining the cable twist (Figure 8) provides

increased immunity to electromagnetic interference.

CIS have standardised on using the orange conductor and blue conductor for the positive connection,

and the orange & white conductor and the blue & white conductor for the negative connection. This

colour code matches that used in Cat-5 patch cords supplied with the C-Bus DIN range of products.

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Clipsal C-Bus Specifications Page 17