Electric power application can be divided into strong and weak electric power according to the strength of power transmission. Building and architectural complex electricity generally refers to ac 220V50Hz and above the strong electricity. Mainly to provide people with electric energy, the electricity into other energy, such as air conditioning electricity, lighting electricity, power electricity and so on.
There are two main types of weak electricity in intelligent buildings, one is the national safety voltage level and control voltage and other low voltage electric energy, ac and DC, AC 36V below, DC 24V below, such as 24V DC control power supply, or emergency lighting backup power supply. The other is the information source containing voice, image, data and other information, such as telephone, television, computer information.
People used to call the weak current technology. It can be seen that the basic meaning of the weak current technology of intelligent buildings is still the weak current technology in the original sense. However, with the rapid development of modern high-tech weak current technology, the weak current technology in intelligent buildings is more and more widely used.
In general, weak current system engineering refers to the second type of application. Mainly include:
1, TV signal engineering, such as TV monitoring system, cable TV.
2, communication engineering, such as telephone.
3, intelligent fire engineering.
4, sound amplification and sound engineering, such as the background music broadcasting in the community, the background music in the building.
5, comprehensive wiring engineering, mainly used for computer network.
With the rapid development of computer technology, the rapid and powerful software and hardware functions, the perfect combination of various weak current system engineering and computer technology, so that the classification of the past is no longer as clear as before. The mutual integration of all kinds of projects is system integration.
Common weak current system operating voltage includes: 24VAC, 16.5VAC, 12VDC, sometimes 220VAC is also considered weak current system, such as some by the camera operating voltage is 220VAC, we can not classify them as strong current system.