Glossary

Absence Detection
A type of occupancy detection, requires user intervention before activation, turns off after delay period.
Additive Colour Mixing
The use of different colours of light to produce another colour, as used with LED RGB systems.
Analogue Dimming
A dimming signal for controlling ballasts and drivers with analogue inputs. Can be either be 1-10V or 0-10V for dimmer packs.
Digital Addressable Lighting Interface (DALI)
This digital control protocol is an industry standard used for lighting control.
Digital MultipleX (DMX)
This digital control protocol is primarily used for lighting control in the entertainment market but can be used to control specific LED drivers. DMX stands for Digital Multi-pleX.
Digital Serial Interface (DSI)
Digital control protocol created by Tridonic Atco used for controlling lighting. Luminaires can not be addressed as with a DALI system.
Microwave
Microwave detectors use a low power microwave generator. Any movement in the area will cause the reflected microwaves to be disturbed causing the detector to assume the area is occupied.
PIR
Passive infrared. A method of detection used in presence detection systems. Measures movement of a heat source against the background heat.
Presence Detection
A type of occupancy detection. Turns on as soon as occupancy has been detected and turns off after a delay period after the last occupancy has been detected.
Subtractive Colour Mixing
The process of changing the colour of a light source by placing coloured filters between the source and the viewer in order to subtract the wavelength of the filter from original source of light.
TCP IP
The Internet Protocol Suite (commonly known as TCP/IP) is the set of communications protocols used for the Internet and other similar networks. It is named from two of the most important protocols in it: the Transmission Control Protocol (TCP) and the Internet Protocol (IP). In lighting it is starting to be used in control systems to allow wide area communications.
Touch Dim
A simple control using a retractive switch to provide a switched mains signal to the control gear.