Technical information

TECHNICAL INFORMATION
205
C-Bus Design Guide
Assigning Addressing
The C-Bus design requires that all Units on the Network are uniquely identied by a
Unit Address. Loads must also be assigned a control Group Address. Various methods
of assigning addresses and their descriptions are now discussed.
Grid Method of Addressing
The Grid Method is the procedure whereby Unit Addresses are conveniently allocated
to C-Bus Units as a function of physical location in the installation. A grid consisting
of 10 columns by 10 rows is superimposed over the site plan locating C-Bus Units and
loads. This denes the Unit Addresses.
This method does however have limitations, when:
• Two or more Units are located in the same physical grid co-ordinate.
• The grid size exceeds 10 columns by 10 rows, for large or diverse projects
(more than the maximum 100 Units are required for multiple Network installations.)
When the Grid Method becomes insucient, alternative methods need to be explored.
Systematic Address Allocation
Unit Addresses are assigned in an ascending order on an installation plan, traversing
left to right, up and down. This process is repeated systematically until all Units are
covered o.
Reserved Addressing (Recommended)
With 255 unique three digit decimal Unit addresses available to the designer, an allocation
or block of numbers could be assigned to specic C-Bus device types. This is known as
‘Reserved Addressing’ .
A typical Reserved Addressing scheme is shown below;
• PC Interface* 000
• Four Channel Relays 010-019
• Four Channel Dimmers 020-029
• One Gang Key Inputs 030-039
• PIR Occupancy Sensors 040-049 etc…
* The PC Interface must be allocated the Unit Address 000 in every Project.
(cont’d)
Neo Key
Input (Learn)
E5058NL
4 Channel Voltage
Free Relay (Learn)
L5504RVF
Power Supply
5500PS
Area 1
Managers Office
Managers Office
Area 1
Meeting Room Lights
Load 1
Load 1
Load 3
Load 4
East Corridor Lights
Toilet
36VDC
240VAC 240VAC
240VAC
C-Bus Network / 1000 Meters / 100 Devices
C-Bus Addressing - Example Conguration
3 Implementing C-Bus Designs