The Gira KNX brightness controller turns energy-saving room and workplace lighting into a reality. It is mounted on the ceiling directly above the area to be illuminated – above a workstation, for example – and analyses the lighting conditions of the surface below. The brightness sensors register a range from 0 to 2,000 lux.
Coupled to the lighting system, it dims or brightens the lighting depending upon the amount of daylight. A single device thus acts both as a brightness sensor and a brightness controller. Continuous constant lighting control can be achieved with dimmable lights. Where lights are only switchable, the lighting is switched on and off. Up to five light groups can be dimmed in parallel, each one shifted by an individually adjustable difference value if required.
The brightness measurement is calibrated using the engineering tool software (ETS) via the bus. The brightness setpoint can also be adjusted via the bus. Brightness control can be activated and deactivated using any button, or by a motion or presence detector. The preset control can be overridden or disabled by pressing a light switch or dimmer.
The brightness controller is available in two variants for either flush-mounted or surface-mounted installation. For flush mounting, the controller is installed in a standard flush-mounted device box. Surface mounting is in the white, plastic housing with housing cover and screw stopper included in delivery.
(reflection factor of work surface approx. 30%)
via the bus voltage
in a 58 mm switch box