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Lighting Controls
Colour - Changing Lighting Controls
Havells Sylvania supports colour-changing luminaires from all three product brands (Concord, Lumiance and Sylvania)
with compatible control systems.
How Does RGB Colour Mixing Work?
RGB colour mixing is an additive process: optically combining the output of red, green and blue coloured-lamps or
LEDs to create the desired colour. A typical control system can vary the intensity of each of the three channels in steps
of 1/255th of full-brightness, leading to 255 red x 255 blue x 255 green combinations, or a spectrum of 16.5 million
possible colours.
What is DMX?
DMX (Digital MultipleX) is a lighting control protocol, originating from the entertainment industry, which is capable
of transmitting the levels of up to 512 channels very rapidly, updating many times per second. The DMX control
protocol is digital, which means that it sends the level-values for each channel as a stream of binary data using a single
balanced cable. As such it is ideal for controlling arrays of colour-changing luminaires, where a luminaire may typically
require three channels of control at a time: one for the RED level, one for the GREEN level and one for the BLUE level.
Therefore to instruct a luminaire to emit purple light, for example, the red and blue channels would be set to a high
level whilst the green channel would be instructed to be at zero brightness
The DMX signal is used for controlling a driver, and is not directly connected to the actual LEDs themselves because
it is not a power signal. Regulated power for the LEDS (or other lamp types) is provided by the driver or control gear,
which may be built into a luminaire or which may be remote.
DMX is wired in a daisy-chain topology, of up to 300m long with the “far end” terminated by connecting a 120R
resistor between the + and – data conductors. There can be upto 32 “unit loads” connected to the DMX bus, where
a typical luminaire has a unit load of “one”. For longer runs, or more luminaires, DMX repeaters/splitters or signal
amplifiers are required. Some products, such as the Floodline RGB from Sylvania have a lower unit load, enabling
longer chains of luminaires.
Typical System Block Diagram:
DMX Wiring
Recommended DMX cable:
Belden 9841 (two-core screened
cable)
Maximum DMX cable length:
300m, wired as a daisy-chain (no
loops, spurs. T’s or Y’s)
Maximum number of DMX
devices per daisy-chain: 32 “unit
loads”
DMX controller - Chrome
DMX Controller
Note: more advanced DMX control systems, signal distribution and programming are available on request.
DMX Controllers for use with Colour-Changing luminaires
0036926
0036927
Brushed Stainless Steel fascia, for Wall Mounted DMX Controller
0036928
White fascia for above
0036929
Polished chrome fascia for above
0036930
DMX controller - Brushed Stainless Steel
Wall Mounted DMX Controller with LCD display. Requires a fascia, from the list below.
User controls: scroll wheel and buttons
Select colours, select sequences and adjust master speed/brightness
Outputs: 2 x DMX512.
Configurable terminals: switch input, or 0-10V output.
Professional line-level audio input for sound-to-light sequencing.
Built in time-clock with astronomical trigger function.
Built-in webserver for monitoring and colour/pattern recall.
Does not require a PC to configure or operate.
Key feature: Simple out-of-the-box quick setup for standard colours/luminaires
Pre-programmable DMX controller
Configured from a PC via USB connection, using simple Windows software
1 x DMX output
Automatic replay without user interaction