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2.6.2 DALI
The DALI standard is known as IEC62386. The DALI standard encompasses the communications
protocol and electrical interface for lighting control networks. Instead of just regulating the power,
DALI systems communicate directly with lighting ballasts.
Being digital, DALI can be used to create intelligent lighting systems that provide increased energy
savings, easier installation and maintenance, with maximum control and retrofit flexibility.
DALI was established as an open communication successor to the Digital Serial Interface (DSI) and
1-10 V lighting control systems. DALI devices include fluorescent HF ballasts, low voltage
transformers, LEDs, light sensors, motion detectors, wall switches and gateways to other protocols.
There can be up to 64 DALI devices on a single DALI network. This is called a DALI universe.
Advantages:

can provide feedback on status.

can be addressed separately or as part of a group

can all be contacted at the same time by way of a broadcast.

can connect other devices with MultiMaster control
In contrast, DSI and 1-10V devices are not separately addressable and are controlled based on
hardwired groups. The net result is that to achieve similar control functionally, DALI requires less
complex (and therefore less expensive) wiring topology than DSI or 1-10V analogue devices.
1-10V
Switching/Dimming
Actuator
1-10V solution: At least one 2-way switching/dimming actuator is needed per room
DALI
DALI Load Controller
DALI solution: More functions – fewer components.
With just two wires at the output, the interface has the same functionality as 16 switching/dimming
actuators. This means that a single unit can be used to form up to 16 groups which can then be
easily changed using software – there is no need to do anything with the wiring.
Figure 5 – DALI Network
Philips LightMaster
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Introduction