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Advantages of DALI Bus(advantages of dali lighting control)

Advantages of DALI Bus(advantages of dali lighting control)

2020-09-08

First of all, each component in the DALI system has its own independent address, so it can directly communicate with each component.

Second, on a pair of twisted-pair cables, the DALI dali driver system can control several sets of devices.

Third, the lights can be turned off by issuing instructions through the DALI controller system, without having to set a switch on the main circuit.

Fourth, the DALI dimmer control system can not only issue instructions to the lighting device, but also receive signals from the lighting device. The traditional control system can only send instructions to the lighting device from the system, and the gap between the two is obvious. The DALI device system receives the feedback signal of the lighting device including: the status of the light, that is, is the light on or off? The preset lighting level and the state of the ballast.

Fifth, the control line is simple. No matter what topology is adopted, the control line in the DALI system is an ordinary two-core cable.

Sixth, the DALI dimmer switch can be easily reconfigured. By resetting the program, the lighting scene and function can be easily changed without changing any hardware.

Seventh, it is easy to add new components. When the lighting system needs to be expanded and new components are added, no matter where in the DALI switch module system, just connect the components to the DALI network without rewiring.

 

DALI basic introduction(features of dali)

Digital Addressable Lighting Interface (DALI)

Digital Addressable Lighting Interface (DALI)

The DALI slave unit sends data only when the host requests data, that is, it uses command response.

In the same DALI network, there are a maximum of 64 slave units, and each slave unit has an independent short address (Short address). It is also possible to assign a slave unit to a group, up to 16 groups can exist simultaneously, and a slave unit can belong to different groups. Each unit can set 16 scenes.

Main features of DALI protocol

a) Asynchronous serial communication

b) 1200 baud rate, using Manchester encoding format

c) Two-wire differential signal

d) When the differential voltage is greater than 9.5V, it is high level

e) When the differential voltage is less than 6.5V, it is low level

f) The communication process is controlled by the host unit

g) A DALI bus can connect 64 slaves

h) Each slave can be addressed individually

DALI electrical characteristics

In the idle state, the DALI bus is high, and the method of controlling the bus by the slave unit

1. When outputting high level, don't interfere with the signal of the host.

2. When outputting low level, directly short-circuit the DALI bus lines to each other

3. The maximum current of DALI bus is 250mA

4. Two-way communication cannot be carried out at the same time

5. The longest transmission data line is 300 meters, or the voltage drop cannot exceed 2V

 

DALI requires 3 basic components(dali wiring requirements):

1 DALI PS bus power supply

2 DALI control equipment such as: GC group control module SC scene control module, etc.

3 DALI power supply

dali dimmer control manufacturer

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