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Security wire and cable used in access control system
Since the mid-twentieth century, with the continuous progress and rapid development of science and technology, the content of human economy and social activities has been comprehensively improved from depth to breadth, the vigorous rise and rapid development of the information industry, the demand for wire and cable products Increased, various specifications of wire and cable products have been used in emerging high-tech industries such as communications, networking, security, fire protection and so on.
According to incomplete statistics, the cable market is increasing at an annual rate of 8% -12%, and security cables are developing rapidly at a growth rate of 15% -20%. Compared with the power, communications, broadcasting, and other industries, the security cable industry has a late start and backward technical equipment. After more than 30 years of vigorous development, China's security industry has continuously expanded its application scope, and the industry's subdivisions have touched all aspects of society. In the construction of the entire weak current project, the cable is the most basic facility, and the cable industry is also rising. Let's talk about the selection of cables in the access control system.
Domestic security ushered in the peak period of development
In China, with the rapid development of the national economy and information technology, the country ’s investment in power grid construction has increased, and the pace of rapid development of the domestic security industry has continued to advance, requiring a large number of wires and cables, which have promoted the domestic wire and cable industry. Great development.
Compared with power, communications, broadcasting, and other industries, the security cable industry has an objective situation of late start, backward technical equipment, and small industrial scale. The major domestic cable manufacturers are mainly concentrated in the Yangtze River Delta region and the Pearl River Delta region, and are generally divided into: foreign-funded enterprises, domestic professional enterprises, and general small-scale enterprises according to the size and characteristics of the enterprises.
Foreign-funded enterprises also value the huge potential of China's wire and cable industry. They have set up factories in China in order to enter the Chinese wire and cable market, and domestic security cables have ushered in a peak period of development.
1. Application requirements of cables in access control
In building video intercom systems, the quality requirements for connecting cables are quite high. Cables for transmitting voice signals and alarm signals mainly use PVC sheathed flexible wires (RVV) with more than 4 cores, and coaxial cables SYV-75-5 are mainly used for video transmission. Some network pairs have appeared today. The new technology of signal transmission for twisted wire transmission, including video, does not use coaxial cable. If the system is to prevent external interference or cannot be grounded, the connection wire used in the system must be a shielded wire (RVVP) type shielded cable.