Digital Adressable Light Interface
Regulation down to 1%
Work to develop a digital standard for the lighting industry began in 1996. By the autumn of 1999 the standard was ready, and named DALI - Digital Addressable Light Interface. Unlike the digital DSI system, DALI features two-way communication with the luminaire. You can tell whether the tubes are working correctly, and at what lighting level they are.
The greatest revolution however, is that the luminaires are addressable. In total there are 64 available addresses before you need to use a router. These 64 addresses can be split across 16 zones. This opens up new possibilities for flexibility in lighting with restructuring of buildings. Price is the principle difference between this and an ordinary BUS system. The limitation is that the DALI protocol only relates to lighting.
The DALI system also makes it cheaper to integrate lighting control into a BUS system. This works by using an interface from the current system over the DALI system. With this, you get access to 64 addresses and 16 zones by using a node/router from the current system.
The luminaires suitable for the DALI system must use control units suitable for DALI. Specific software for the DALI system has been developed which makes it possible to run central control from a PC.
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