D

Daylight control

Artificial daylight can be dimmed or switched off entirely to ensure a constant lighting level (constant lighting control) and save energy. A sensor measures the current illuminance and automatically adjusts the artificial lighting to the preprogrammed level.

DALI stands for “Digital Addressable Lighting Interface” and is an interface protocol for digital communication between electronic lighting equipment (electronic ballasts, transformers, etc.).

64 digital electronic operating devices can be connected to each DALI controller and controlled independently of one another via the same control line. The luminaires are individually addressed so rooms can be relit with a high degree of flexibility without changing the cabling.

For more information on DALI go to www.dali-ag.org

DALI – important facts at a glance (PDF)

 

Dimmable luminaires reduce energy consumption by their very nature. Every excess lumen that is generated and does not produce a benefit increases CO₂ emissions unnecessarily. The greatest potential energy savings with lighting systems come from automatically adjusting the dimming level according to the amount of freely available daylight. In addition to daylight sensors, motion sensors can be integrated so the lighting is controlled directly by the presence or absence of people.

Tridonic goes one stage further. A long series of intelligent functions enables energy to be saved continually and effortlessly with dimmable ballasts.
 

 

The digital serial interface (DSI) enables DSI ECGs to be controlled. The luminaires are switched via the control line irrespective of the cabling for the power supply. Using a digital interface means that the light level is identical from the first to the last light source.

The digital serial interface (DSI) enables DSI ECGs from Tridonic to be controlled. The luminaires are switched via the control line irrespective of the cabling for the power supply. In contrast to DALI, however, it is not possible to address individual ECGs separately.

The low-voltage cable of the digital interface is polarity-free and can therefore be connected with either polarity to the DSI connection of the ECG. If the room layout is changed only the control line needs to be rerouted; the load line can be left unchanged. On/off switching is controlled via the digital interface.

Thanks to their built-in intelligence the PCA ECO DSI ECGs are capable of specifying a minimum dimming value, maximum brightness and an emergency lighting value for all the ECGs in a control circuit.