Is the building automation system equal to the intelligent lighting system?

Speaking of buildings, naturally we can think of lighting! Speaking of intelligent lighting can also be associated with the building automation system, which makes many friends wonder, is the building automation system equal to the intelligent lighting system? What is the difference between an intelligent lighting system and a building automation system?

1. Is the building automation system equal to the intelligent lighting system?

Architectural lighting is the object of optimization in energy-saving design. Lighting energy-saving must pay attention to the link, and relying solely on the traditional building BA control system to achieve simple regional lighting and time switch function, it is obviously difficult to meet the lighting energy-saving needs. Therefore, the introduction of intelligent lighting control system is imperative. The intelligent lighting automatic control system can not only save energy, reduce maintenance costs, improve lighting quality, but also realize intelligent lighting control of buildings. Intelligent lighting control system is only one of the building control systems. section.

Second, what is the difference between intelligent lighting system and building automation system?

The intelligent lighting system is one of the more widely used ones, and one of the subsystems that is easily confused with the building automation system in actual operation. In the design of lighting systems of existing intelligent buildings, the old design method is generally used, or in the past lighting design system, the contacts controlled by the building automation system (BAS) are connected in series in the lighting circuit, and the central monitoring is added. Functions such as special control or area control and timing switches, and increased infrared sensing for shape control. Of course, this control method has its obvious limitations:

Economical: In order to save costs, the number of electrical circuits in this design is generally small. The design often only focuses on the control of large areas. If the electrical circuit is subdivided from the perspective of humanization and energy saving, it will cause an investment. The large increase in costs is something that investors are not willing to see. However, the reduction of the loop, in turn, has greatly increased the cost of ownership (electricity).

Convenience: Since this type of design usually does not set the switch on site, and all the lighting circuits are controlled centrally through the BAS central control room, the user cannot switch and adjust according to the actual situation of the site, and can not interfere with the state and illumination of the lighting, to the actual The use brings great inconvenience. Simultaneously. Due to the simplistic control function, the traditional lighting design can only realize the function of simple time switch in the building automation (BAS) system. If you want to achieve scene preset, scene change and brightness adjustment in a specific area, the technical difficulty of the actual operation. Still quite large.

Independence: Since such simple superimposed lighting systems are not really a separate subsystem, the lighting system will be affected at the same time when the building automation system (BAS) fails, especially for lighting with emergency evacuation lighting. In terms of loops, this is unforgivable.

1, simple design and more economical

The system's lighting circuit design is simple, the system is easy to install, easy to operate and maintain, its software programmability and flexible structure of the hardware, greatly saving the investment cost and maintenance operation cost of the construction developer, shortening the installation period and improving the return on investment.

The various input, output and system support units in the system can be connected by intelligent lighting system controllers. The large-section load cable is directly connected to the lighting fixtures or other electrical loads from the output of the output unit without having to go through the switch. It is not necessary to consider any control relationship. After the installation of the entire system is completed, the address coding of each unit is set by software to establish a corresponding control relationship. Installation requires only a load cable connection between the output unit and the load, which saves a lot of cables and reduces construction time and labor costs.

2, intelligent control to save costs

Because the intelligent lighting system uses the control software to remotely control and centrally monitor the entire lighting system, the control relationship can be modified at any time and conveniently according to user requirements. When it is necessary to change the lighting control relationship for some reason, it is only necessary to modify it in the software without re-laying the cable.

At the same time, due to the use of infrared sensors, brightness sensors, timing switches and dimming technology and intelligent operation mode, any single point, double point, multi-point, area, group logic control, time switch, brightness hand / automatic adjustment Infrared monitoring, remote control, scene combination and other lighting control functions can not only display rich lighting effects, but also enable the entire lighting system to operate accurately according to economic solutions, thus greatly reducing operating management costs and saving energy.

Moreover, compared with the traditional lighting control method, it can save energy and reduce the use cost, thereby achieving social cost savings.

3, more can reflect the system's compatibility and functional diversity

Since the system status and control commands are stored in each input and output unit in the system, no data is lost after power failure. When the power is restored, the system automatically restores the working state before the power failure according to the preset memory parameters, thereby achieving unattended operation. At the same time, the control loop is separated from the load loop. The input and output unit is connected to the bus by only one two-core control line, and a new control unit can be added at any time in the network.

The design of distributed intelligent control and open systems, through the communication protocol (OPC), can be combined with other building management systems (BMS), building automation systems (BAS), security and fire protection systems to improve The intelligent management level of the property is in line with the development trend of modern life.

The system administrator can adjust the lighting layout and expansion functions according to the user's needs and the changes of the external environment, only modify the software settings, or modify the wiring in a small amount, which is suitable for different use requirements of commercial, industrial and home. Buildings with BAS systems will definitely increase the intelligence of the building if they are considered in the design of the building's intelligent lighting system.

3. What are the differences between intelligent lighting systems and building automation systems?

1. About economics

BA Building Control Method (DDC)

Due to cost considerations, the proportion of control loops is small in design, and often only focuses on the control of some large (important) areas. From the perspectives of humanized management, energy saving, and comfort, it cannot To a crucial role. If the control loop is increased in a large amount, the cost will increase sharply, which developers are not willing to see.

An intelligent system specially developed for lighting, a professional control network designed according to the characteristics of lighting, covering the underground garage lighting, floor public area lighting, functional area lighting (office, conference room, multi-purpose hall, restaurant, guest room), Landscape lighting, floodlighting and emergency lighting in the above areas.

2, about compatibility

BA Building Control Method (DDC)

Although the DDC products developed by various manufacturers follow a communication protocol (Lonworks protocol), due to the complicated external structure of the DDC equipment, there are many wiring methods, and the product quality is uneven. Once the equipment fails and needs to be maintained and replaced, it must be found. factory.

The intelligent lighting system adopts an open protocol (EIB protocol: European Bus Protocol), which is not only an agreement within the international unified standard ISO framework, but also becomes the national standard for building automation in China. There are already hundreds of manufacturers' products that comply with this agreement. When the system (device) fails and needs to be maintained and replaced, there are many manufacturers that can meet this agreement.

3. About independence

BA Building Control Method (DDC)

Since such a simple superimposed lighting system is not a truly independent subsystem, the lighting system will be affected at the same time in the event of a BAS failure, especially for lighting circuits with emergency evacuation lighting. s consequence.

The intelligent lighting system is an independent control system. The functions of various functions are rich and stable. If there is an input module dedicated to receiving fire signals, it can also forcibly turn on and off the lighting when the background system fails. The lighting driver module is set to force on or off after the bus is powered down.

4. About the diversity of functions

BA Building Control Method (DDC)

Since such a design usually does not have a switch on site, and all lighting circuits are centrally controlled through the BA central control room, the user cannot switch and adjust according to the actual situation of the site, and cannot interfere with the state and illumination of the lighting, which is very inconvenient in practical use. ;

In addition to simple switching (timing) control of lighting, in order to achieve scene presets, scene changes and brightness adjustment, the actual technical operation is very difficult. The characteristics of modern buildings in terms of intelligence, comfort and energy saving have not been reflected.

In addition to the central control and timing functions of the DDC, the intelligent lighting system can install numerous input modules such as smart panels, human motion detectors, and light sensors on the site, and flexible control according to the personnel activities on site and natural light intensity. Lighting, to achieve different scenarios; in addition to the switching function, the dimming module can also be used for dimming control, constant illumination control, etc. for specific areas, so that the lighting can be effectively utilized; the monitoring of the on-site lighting operation by the central control system can enable the management personnel Timely discovery of problems at the scene.

5. About system construction and equipment installation

The DDC module does not directly connect to the load, but controls the load by controlling the contactor; the DDC needs to install a separate control box, and the control box is connected to the contactor of the lighting distribution box. The wiring is complicated and the structure is complicated; the DDC control box not only accounts for Space, and increase costs.

BA building (DDC) systems usually use network cables for system connection, so they must be laid on weak bridges. This system with high power has no shielding function, which is very demanding on construction and is highly susceptible to interference and affects signal transmission.

Since there is no on-site control switch, detector, etc., the field still needs to install the traditional panel control switch for on-site control, and does not change the traditional control mode, the circuit structure is complex, the cable cost is high, and the construction and maintenance are difficult.

All the equipment of the intelligent lighting system only need to be connected by one bus. The bus adopts the four-core twisted pair with shielding function, which can be laid together with the strong bridge without the interference of the signal; the driving device is directly connected to the load without the contactor, driving The module is mounted under the miniature circuit breaker in the lighting distribution box using a standard 35mm DIN rail. The wiring is simple and the structure is clear.

On-site sensible sensing devices, such as smart panels, human body motion sensors, light sensors, etc. All sensing devices only need one bus connection, which is simple to construct, easy to use and safe. Traditional panel switches do not need to be installed. , saving a lot of material costs and construction and maintenance costs.

6. Management of reliability and function

The DDC module can not directly connect to the lighting load, but indirectly controls the lighting load by controlling the contactor coil. The contactor is not a long-term live device, and the long-term power-off will stick; the frequent switch will cause the contact to age; When there is a change or increase, a large number of DDC modules and contactors need to be added.

Each device of the intelligent lighting system has a built-in CPU, which can be programmed independently, and can flexibly set the control relationship. When the control function is changed, it can be easily realized by software programming. If you need to increase the control loop, just add the driver module. can. Each device can operate independently, which means that damage to one device does not affect the use of other devices.

After reading this article, I believe that there is a certain understanding of building automation systems and intelligent lighting systems. In fact, if the building automation system is equal to the intelligent lighting system, we can answer this question. The intelligent lighting system is part of the building automation system.