Control
The Lighting Control System
Lighting control systems are linked by communications networks and
power supplies.
They contain three components:
- Sensing Device - Provides information to logic circuit
- Logic Circuit - Decides whether to supply lighting, and how much
- Controller - Changes the output of the lighting system
A lighting control system is a device or apparatus that:
- receives information
- decides what to do with that information
- changes the operation of the lighting system
Some examples:
- Occupancy sensor
-
Sensor detects presence or absence or people
-
Decide whether to turn on or shut off lights
-
Sends signal to relay, which closes or opens circuit
- Control station and dimming panel
-
User presses button to recall preset scene
-
Control station recalls scene from memory and sends
signal to dimmer at dimming panel
-
Dimmer adjusts light output to desired level
- Dimmable ballast
-
Controller provides signal to dim
-
Ballast is instructed to dim, and by how much
-
Ballast alters the current to the lamps, dimming them
A lighting control system can incorporate:
- control station
- occupancy sensor
- photosensor
- time switch
- centralized switching system
- other inputs
- master lighting controller
A lighting controller may be a switching panel, dimming panel,
colour controller or an interlinked mixture of these.
The controller controls the lighting load with a variety of
outputs based on decisions made by the logic circuits.
Different control strategies may have overlapping device
requirements. Overall control can still be gained by building a
system of simple components.
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