Clipsal C-Bus Especificações descarregar pdf (Página 21)

1A. Introduction to C-Bus

5.0 Mains and C-Bus Segregation

With all C-Bus units that have mains as well as 36V d.c. bus connections, care must be taken to

adequately separate the 240Va.c. wiring from the bus wiring. Pink C-Bus Cat-5 UTP, with its mains

rated outer sheath, must be used within the conﬁnes of a switchboard.

Wiring practices vary from installer to installer. Sometimes the mains cable entering the switchboard

is double insulated, while other times it is single insulated. When it is double insulated, the outer

insulation must be stripped back to allow the connection of mains wires to the DIN unit power supply

and output terminals.

No isolation issues can be expected between C-Bus and a single insulated mains cable, when the

pink C-Bus Cat-5 cable enters a switchboard and plugs straight into a DIN module.

The 300 mm pink Cat-5 patch leads supplied with all DIN units are used to loop in and out of any

other DIN units within the enclosure.

Where more than one pink Cat-5 cable enters the switchboard, care must be taken to ensure that any

join made between multiple Cat-5 cables is effectively insulated with no exposed terminal screws etc.

Consider terminating multiple C-Bus Cat-5 cables outside the switchboard, and bringing just one into

the RJ socket on a DIN unit.

The mains rated pink sheath allows the C-Bus Cat-5 cable to run closer to mains wiring than would

otherwise be allowed. To give the greatest margin of noise immunity within the switchboard and

overall installation:

• always maintain 150 mm of separation between C-Bus and mains cable, when running C-Bus

cable in parallel with mains

• ensure that C-Bus always crosses mains cable at a 90 degree angle, with at least 60 mm of

separation.

Most importantly, securely anchor both Cat-5 and mains cable in switchboards. This provides an

additional safety margin against contact between loose mains conductors, and the C-Bus

36Vd.c. wiring.

IMPORTANT Wiring regulations covers these issues. An installer must ensure that wiring is

carried out in a safe manner. The safety and protection of users of equipment

is of the highest importance. The product warranty will be affected if a failure is

found to be caused by poor wiring practice. In addition, the isolation between

mains and C-Bus wiring is one of the key checks made during a CIS Approved

Installer* visit.

NOTE

 *An Approved Installer is a person or company that has had the standard

of their installation, servicing abilities and quality of service to customers

recognised by Clipsal Integrated Systems. This recognition is secured through

on going training, on site assessments and customer feedback.

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Clipsal C-Bus Especificações Página 21