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Emergency Lighting System DALI 2.0 Knowledge

Release time:2024-06-28 17:46

1. What is DALI2.0?

DALI is an international standard for digital lighting control. It is a global, open-specification lighting control communication protocol.
It defines the communication method between electronic ballasts and equipment controllers. It conforms to IEC 60929/IEC 62386 standards and is compatible with
It can be compatible with any DALI-compliant device by inputting standard DALI signals.
Digital transmission with Manchester encoding is used to realize the functions of switching, dimming, scene, grouping, and addressing of products.

DALI2.0 is the latest version of DALI, also known as version 2 of the DALI standard lEC62386.

DALI = Digital Addressable Lighting Interface
DALI 2.0 version of the digital light control products in the DALI Association continues to add new lighting control functions, and the international IEC62386 specification, the
So that the overall digital lighting system can achieve simple settings and be an open system compatible with general characteristics.

DALI appeared in the mid-1990s (as part of the IEC 60929 standard) and later became an independent international standard for communication protocols for controlling lighting equipment (IEC 62386 standard).

Over the years, the DALI Consortium has expanded the DALI protocol and introduced certification programs, including the published standards DALI-2, D4i, and DALI+.

DALI is not about a single product, communication technology, lighting system, or control wiring method, and no single definition of DALI is comprehensive enough.

DALI is a protocol of rules and regulations for controlling digital lighting. It is a global open standard!

DALI is a data transfer protocol for lighting control systems that defines digital communication between lighting appliances (driver circuits for various luminaires) and system equipment controllers (e.g., lighting controllers, sensors, etc.). At the same time, DALI supports an "open system" to ensure that DALI devices from different manufacturers are compatible and has become an international standard in the IEC 62386 series.


2. DALI 2.0 Differences from DALI 1.0

DALI-2 is an update of DALI (the original version or version 1.0).
It includes (1) fixing the errors and deficiencies of version 1.0, (2) adding some new features, (3) standardizing the Control Device, and (4) mandatory certification.

DALI 2.0 compared to the DALI 1.0 version to increase the Input device and controller device product definition and function.
The overall development of the DALI digital lighting system will be more complete. In the future, in line with the DALI 2.0 LED driver power supply, it will also become DALI 2.0.
DALI 2.0-compliant LED driver power supply will also become the most basic lighting application in the DALI 2.0 digital building lighting system. Digital lighting can make lighting control easier to set up and reduce the trouble of rewiring.


3. DALI Technical Features

① Each DALI subnet accommodates up to 64+64 short addresses.

- 64 control gears.

- 64 control devices.

② The furthest device line length does not exceed 300 meters (line diameter 1.5mm ², allowable voltage drop 2V)
③ Maximum current permitted per DALI bus power supply is 250 mA.

Simple overview: up to 64 addressable (luminaire) drivers on a single DALI bus in a single DALI subsystem (individual addresses); up to 16 lighting groups (group addresses); up to 16 lighting scenes (scene presets)


4. Application of the DALI system

① Real-time query lamps and lanterns driver and even the light source work status

② can simultaneously access up to 64 lighting control panels or sensors to achieve intelligent lighting control

③ Access to the building automation system through the DALI gateway device supports transforming different transmission protocols.

④ Intelligent control can be realized by accessing special controllers or actuators with the DALI interface.

Composition of the DALI system

A DALI system needs three parts simultaneously: control equipment (issuing commands), control device (receiving commands), and bus power supply (supplying power to the DALI dimming bus). However, different equipment can be selected according to different application scenarios.