As we can see, those dimming protocol can be divided into two categories: analog protocol and digital protocol. At present, we have moved from an analog world to a digital world for many years. The move from analog lighting to digital lighting is through DALI. This article introduces the comparisons between 0-10V and DALI. However, different regions use different protocol due to the history factor.
DALI is an “Open” protocol. As an open protocol, any manufacturer can create devices that communicate using DALI. For example a DALI driver from one manufacturer will work with control stations, sensors, etc. from any other manufacturer using DALI.
1. The DALI protocol is useful if luminaires need to respond to more than one input device (such as a wall switch and a daylight sensor).
2. DALI requires a lighting control cable, but the cable can be run between many fittings. In fact, one DALI network can accommodate up to 64 DALI ballasts.
3. DALI allows lighting controls to operate as stand-alone systems or be integrated into larger building management systems.
4.0-10V is easy to understand systems and commissioning does not require specialized knowledge. However, to get different control groups each group needs separate wiring. 0-10V does not support bidirectional communication, so if sensors are required, additional systems may be necessary.
1. Each device needs its own wiring, which makes installation quite tricky if the lighting control system is large and complex
2. 0–10V system can accommodate around 10 luminaires per controller.
3. The signal goes only one way, from the dimmer to the LED driver or fluorescent ballast. Because there is no signal coming back from the lights, there’s no data on which to measure their performance, as with digital systems.