What's the difference between intelligent lighting system and building automation system?

Architectural lighting is the object of optimization in energy-saving design, so we must pay attention to lighting energy saving. However, it is obviously difficult to meet the needs of lighting energy saving by simply relying on the traditional building BA control system to realize simple regional lighting and timing switch functions. Therefore, it is imperative to introduce intelligent lighting control system. Intelligent lighting automatic control system can not only save energy, reduce maintenance cost and improve lighting quality, but also realize intelligent lighting control of buildings. Intelligent lighting control system is just one kind of building control system. Part.

2. What's the difference between intelligent lighting system and building automation system?

Intelligent lighting system is one of the most widely used systems, and it is also one of the subsystems that are easily confused with building automation system in actual operation. In the lighting system design of the existing intelligent building, the old design method is generally adopted, or in the previous lighting design system, the building automation software is connected in series with the contacts controlled by the building automation system (BAS) in the lighting loop, the central monitoring realizes the functions of special control or area control and timing switch, and the infrared induction is added to realize the shape control. Of course, this control method has its obvious limitations:

Economy: In order to save costs, the number of circuits in this design is generally small, and the design often only focuses on large-area control. If the circuit is subdivided from the perspective of humanization and energy saving, it will cause investment. The cost has greatly increased, which investors do not want to see. However, the reduction of loops in turn greatly increases the use cost (electricity fee) of the ultimate owner.

Convenient: Because this design usually does not set switches on site, but controls all lighting circuits centrally through the BAS central control room, users can't switch and adjust according to the actual situation on site, and will not interfere with the state and illumination of the lights. Lighting. It is very inconvenient to use. Meanwhile. Because the control function is too simple, the traditional lighting design can only realize the simple timing switch function in the building automation (BAS) system. If we want to realize the scene preset, scene change and brightness level in a specific area, the actual operation technology is difficult. It's still quite big.

Independence: Because this simple superimposed lighting system is not really an independent subsystem, when the building automation system (BAS) breaks down, the lighting system will be affected at the same time, especially the lighting circuit with emergency evacuation lighting function, which is absolutely unforgivable.

1, simple and economical design

The lighting circuit of the system is simple in design and easy to install, operate and maintain. The programmability of its software and the flexibility of its hardware structure greatly save the investment cost and maintenance and operation cost of building developers, shorten the installation cycle and improve the return on investment.

Each input, output and system support unit in the system can be connected through the intelligent lighting system controller, and the large-section load cable is directly connected to the lighting lamp or other electrical load from the output end of the output unit without switching, and the whole system installation does not need to consider any control relationship. After the whole system is installed, the address codes of each unit are set by software, so as to establish the corresponding control relationship. When installing, only the load cable is used to connect the output unit and the load, which can save a lot of cables and shorten the construction time and labor cost.

2. Intelligent control saves costs.

Because the intelligent lighting system uses control software to remotely control and centrally monitor the whole lighting system, the control relationship can be easily modified at any time according to the needs of users. When the lighting control relationship needs to be changed for some reason, it only needs to be modified in the software without rewiring.

At the same time, due to the adoption of infrared sensor, brightness sensor, timing switch, dimming technology and intelligent operation mode, any lighting control functions such as single-point, double-point, multi-point, regional and group logic control, timing switch, manual/automatic brightness level, infrared monitoring, remote control, scene combination, etc. can be realized, which not only can display rich lighting effects, but also can make the whole lighting system run accurately according to the best economic scheme, greatly reducing the operation and management cost, and greatly reducing the cost.

Moreover, compared with the traditional lighting control mode, it can save energy and reduce the use cost, thus realizing social cost saving.

3. It can better reflect the compatibility and functional diversity of the system.

Since each input/output unit in the system stores system status and control instructions, data will not be lost after power failure. When the power is restored, the system will automatically restore to the working state before power failure according to the preset memory parameters, thus realizing unattended operation. At the same time, the control loop is separated from the load loop, and the input and output units are only connected by a double-core control line as a bus, so new control units can be added to the network at any time.

The design of distributed intelligent control and open system can be well integrated with other building management systems (BMS), building automation systems (BAS), security and fire protection systems through communication protocols (OPC), thus improving the intelligent management level of building management systems. Property conforms to the development trend of modern life.

As long as the system administrator modifies the software settings or several lines according to the user's needs and changes in the external environment, he can adjust the lighting layout and expand the functions, which is suitable for different use needs of business, industry and family. If the building with BAS system is considered in the design, it will definitely improve the intelligence of the building.

What's the difference between intelligent lighting system and building automation system?

1, on economics

Building control method

Because of the cost, the proportion of control loop in the design is very small, and it is often concentrated on the control of some large (important) areas. From the perspective of humanized management, energy saving and comfort play a vital role. If a large number of control loops are added, the cost will increase sharply, which developers do not want to see.

The intelligent system specially developed for lighting, and the professional control network designed according to the lighting characteristics, covers the underground garage lighting, floor public area lighting, functional area lighting (office, conference room, multi-function hall, restaurant, guest room), landscape lighting, floodlighting and emergency lighting in the above areas.

2. About compatibility

Building control method

Although DDC products developed by various manufacturers follow a communication protocol, due to the complex external structure of DDC equipment, many wiring modes and uneven product quality, once the equipment fails, it needs to be repaired and replaced, but the manufacturer must be found. .

Intelligent lighting system adopts open protocol (EIB protocol: European bus protocol), which is not only an agreement within the framework of international unified standard ISO, but also a national standard of building automation in China. The products of hundreds of manufacturers around the world are in line with the agreement. When the system (equipment) breaks down and needs to be repaired and replaced, there are many manufacturers who meet this agreement to choose from.

3. About independence

Building control method

Because this simple superimposed lighting system is not a truly independent subsystem, when BAS fails, the lighting system will be affected at the same time, especially the lighting circuit with emergency evacuation lighting function, which will cause very serious problems and consequences.

Intelligent lighting system is an independent control system with rich equipment and good stability. If there is a special input module for receiving fire alarm signals, the lighting can be turned on and off forcibly when the background system fails; The lighting driving module can also be set to be forcibly turned on or off after the bus is powered off.

4. On functional diversification

Building control method

Because there is usually no switch in this kind of design site, all lighting circuits are controlled centrally by BA central control room, so users can't switch and adjust according to the actual situation on site, and they can't interfere with the state and illumination of the lamp. Lighting is very inconvenient in practical use. ;

In addition to simple lighting on-off (timing) control, it is very difficult to realize scene preset, scene change and brightness level building automation software. The characteristics of modern architecture in intelligence, comfort and energy saving are not reflected.

In addition to the central control and timing function of DDC, intelligent lighting system can also install many input modules on site, such as intelligent panel, human motion detector and light sensor, and can realize different scenes according to the flexible control of on-site personnel activities and natural light intensity. In addition to the switch function, the dimming module can also control the dimming and constant lighting in a specific area, so that the lighting can be used most effectively; The central control system monitors the operation of on-site lighting, which is convenient for managers to find on-site problems in time.

5. About system construction and equipment installation

DDC module is not directly connected with the load, but controls the load by controlling the contactor; DDC needs to install a separate control box and connect the contactor of lighting distribution box, which has many lines and complicated structure; DDC control box not only occupies space but also increases cost.

BA building (DDC) system usually uses network cable for system connection, so it must be laid on weak current bridge. This large current crossing system has no shielding function, high construction requirements and is easily disturbed, which affects signal transmission.

Because there are no field control switches and detectors, the traditional panel control switches are still installed for field control, and the traditional control methods are not changed, such as complex circuit structure, high cable cost, difficult construction and maintenance, etc.

All devices of intelligent lighting system only need one bus connection, and the bus adopts four-core twisted pair with shielding function, which can be laid together with strong bridges without paying attention to signal interference; The driving device is directly connected to the load without contactor, and the module is installed under the miniature circuit breaker in the lighting distribution box through the standard guide rail. Simple wiring and clear structure.

Sensing equipment, such as intelligent panel, human motion sensor, optical sensor, etc. , which can be configured on site. All sensing devices only need bus connection, which is simple in structure, convenient and safe to use, and there is no need to install the switch of the traditional panel. , saving a lot of material costs and construction and maintenance costs.

6, reliability and function management

DDC module can't directly connect the lighting load, but indirectly control the lighting load by controlling the contactor coil. Contactor is not a long-term live equipment, and it will get stuck if it is cut off for a long time; Frequent switching will lead to contact aging; When changing or adding, 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 flexibly set the control relationship; When changing the control function, it can be easily realized by software programming; If the control loop needs to be added, just add a drive module in Can. Each device can operate independently, which means that the damage of one device will not affect the use of other devices.

After reading this article, I believe I have a certain understanding of building automation system and intelligent lighting system. In fact, we can answer whether the building automation system is equivalent to the intelligent lighting system. Intelligent lighting system is a part of building automation system.