Clipsal C-Bus Spezifikationen Seite 23

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1A. Introduction to C-Bus
6.5 Types of Power Supplies
C-Bus power supplies are available in a number of configurations. These include stand-alone units,
and supplies incorporated into relay or dimmer output units. Table 2 lists the output currents of various
power supply types.
Type of Power Supply Output Current
DIN rail stand-alone 350mA
DIN rail on-board 200mA
Pro Series Dimmer on-board* 60mA
Matrix Switcher 330mA
Table 2 – Power supply output currents
NOTE *The Twelve Channel Pro Series Dimmer does not come with an on board
C-Bus Power Supply.
The output current specified in an on-board power supply is independent of any power that the unit
uses itself. When calculating the number of units to be powered by an on-board supply, you do not
need to include the unit with the on-board supply in the calculation.
7.0 Network Burdens
A network burden is a 1 kΩ resistor in series with a 10 µF to 22 µF, 50V capacitor. A network burden
acts as an a.c.
filter, and must be connected across each network to ensure reliable communication. Only one
burden should be present
on a C-Bus network.
A network burden has been built-in to particular C-Bus units. Depending on the Unit Address, the
network burden is enabled or disabled using the C-Bus Toolkit software. For a network burden to be
enabled via software, the unit must be at Unit Address 001.
An external hardware network burden can also be used. It is enclosed in an RJ45 package, which can
be plugged into any C-Bus RJ45 socket on the network.
Software burdens can be found on:
• all C-Bus DIN Rail Output Units
• the C-Bus Network Interface
• the PC Interface
• Touch Screens
• the HomeMinder
• General Input Units
• Network Bridges
• Telephone Interfaces.
This list will continue to grow as additional C-Bus units are developed. For more information on a
C-Bus unit, see the installation instructions included with the unit.
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