Keywords: What is DALI? DALI technology evolution DALI technical parameters DALI technical characteristics DALI bus laying DALI integration to BMS system way DALI application advantages
　　 References: Tridonic DALI Manual, Tridonic Design Technical Manual, International DALI Association Manual
The development of society drives new technologies, and the development of new technologies promotes social progress.
Illumination----as an indispensable element in today's human society, it is increasingly important to the development of human civilization and society. Therefore, the demand for new lighting technology in the world today is enormous, and innovation in new lighting technologies is a must. As a lighting worker, there should be a sincere heart to introduce, promote and develop practical lighting technology.
Here I would like to introduce and share with you DALI (Digital Addressable Lighting Interface) digital addressable lighting interface technology.
In the past, the only purpose of equipped with lighting equipment was to provide lighting. Nowadays, lighting technology has added many attractive features in terms of convenience, practicality, comfort and energy saving. These features have surpassed the goal of simply providing lighting.
Traditional electrical lighting technologies based on simple connections of loop switches, loop dimming, appliances and light sources have been difficult to meet the current market demand for lighting equipment. For example, a control device with an analog interface (1 to 10 V) does not have the flexibility to control each light source in one system, and cannot recombine each light source freely, nor can it feedback the state of the light source in real time.
In addition, there are many control technologies and protocols for lighting (such as 485, 232, DMX, EIB, LON, etc.), but because they are not a unified technical protocol platform, they cannot communicate with each other and are compatible with each other. In addition, the above technical agreements belong to different manufacturers and there is no unified association coordination, which causes great inconvenience and waste of resources for the design and the owners.
Due to the above situation, the owner needs to pay a high fee to integrate and maintain the lighting bus system of non-international standard. At the same time, it also puts high demands on the system knowledge of designers and electricians. They all need special training from different manufacturers. As a result, the installation of these systems has become a labor-intensive, technically demanding and costly business.
Therefore, people are thinking: If there is an international standard digital technology protocol, the protocol is only used for lighting control and communication. The purpose of this protocol is to simplify the communication structure, optimize control commands, reduce application and maintenance costs, and facilitate compatibility and integration. And the agreement is accepted by a wide range of lighting manufacturers, and a special international association coordinates and develops the agreement. It is an international standard for ensuring the interchangeability of dimmable devices from different manufacturers, and provides security to planners, lighting manufacturers, building owners, installation companies and end customers in terms of source of supply. Guarantee.
This is: DALI (Digital Addressable Lighting Interface) digital addressable lighting interface technology, an innovative technology specifically designed for lighting based on the above factors.
What is DALI?
DALI is an abbreviation for "Digital Addressable Lighting Interface".
DALI is a data transmission protocol that defines the digital communication between lighting appliances and system equipment controllers (such as sensors, gateways, etc.). It is not a new bus, but it supports open systems. The first goal of the design application DALI was to optimize an intelligent lighting control system with simple structure, easy installation, easy operation and excellent functions. It can be used not only for lighting control in a room, but also with the building management system (BMS). ) docking. Unlike the BMS, EIB or LON bus system, the DALI system is not extended to a system with various complex control functions, but only as a lighting control subsystem application, integrated into the BMS through a gateway interface, acceptable The BMS control command, or the operating state parameters of the recycling subsystem.
The biggest feature of DALI technology is that the individual luminaires have independent addresses. The DALI system software can accurately dim and switch the single lamp or any group of lamps, whether they are the same circuit or different circuits in strong power. That is, the lighting control is independent of the high-power circuit. The DALI system software can independently address single or multiple lamps on the same high-voltage circuit or different circuits, thereby achieving separate control and arbitrary grouping. This concept brings great flexibility to the lighting control, users can design the lighting solution to meet their needs as needed, and even modify the control requirements during the operation after the installation, without having to do any work on the line. change. Due to the simple structure of the system, no need for lighting control boxes or dimming boxes, and the traditional wiring method can be retained, the application of DALI technology can simplify the installation process, reduce the wiring cost, shorten the debugging time, and realize many intelligent lighting control based on loop control. Features that the system cannot implement.
DALI is the ideal, simplified digital communication method designed to meet the needs of today's lighting technology. Its communication and installation have been simplified as much as possible. All intelligent components in a local system communicate in a simplified and interference-free manner. It has no special requirements for data cables and does not require a termination resistor to be installed on the cable to prevent reflections.
DALI is designed with the joint efforts of major control equipment manufacturers who want to develop a technical standard that meets all requirements for the lighting market. All component manufacturers in the lighting industry are now able to solve complex lighting problems in a simplified, unified and convenient way.