DALI (Digital Adressable Lighting Interface)

DALI is a method of controlling electronic control gear for fluorescent lamps using digital signals. Unlike analogue brightness controls, DALI enables each luminaire to be controlled individually. It can be easily integrated in a building management system. Individual addressing means that not only the luminaires can be controlled but they can provide feedback messages so they can be operated in versatile energy-saving arrangements. DALI supplements Appendix E of the existing IEC Standard 929 in terms of the mode of operation of electronic control gear
1. Digital switching - Luminaires can be switched via the control cables irrespective of polarity.
2. Addressing - 64 ballasts can be addressed, allowing them to be controlled independently with a common control wire.
3. Simple control wiring - Switching and dimming circuits are independent of the wiring layout, allowing maximum flexibility and convenience; this low-voltage wire can be routed in any way and is polarity-free to reduce installation errors.
4. Refurbishment - Control circuits are independent of polarity. This allows the use of existing wiring in old buildings. In new buildings, a five-conductor cable for both power supply and control wiring can be employed.
5. Lighting scenes - Preset lighting scenes for different tasks and moods can be programmed and stored in the DALI ballasts.
6. Flexible room layout - Future layout changes do not necessitate wiring changes.
7. Upgrading - New sensors or interfaces can be added without changing the luminaire wiring; simply choose which luminaires are to be controlled and reprogrammed.
8. Distortion-free - Digital signals allow greater freedom in wiring layout.
9. Flexible - Each sensor can be configured to control any luminaire or group of luminaires.
10. Overlapping groups - Luminaires can be included in more than one sensor group, e.g. movement detection and infrared control.
11. 11 Infrared control zone 1 - Zones can be altered without the need to rewire.
12. Infrared control zone 2
13 PIR (passive infrared) controlled zone
14. Daylight regulating zone - Controlled by Photocell
15. DALI room controller