Detailed explanation of structured Integrated Wiring System (1)

This article introduces the structured cabling system. Many people may not understand the structured cabling system. It does not matter. After reading this article, you will certainly have a lot of GAINS. I hope this article will teach you more things.

As the pace of social informatization accelerates, people's concepts and requirements for modern buildings have also changed. The emergence of smart buildings has injected a new concept into traditional buildings, and become the direction of modern building development, and structured Integrated Wiring System is the foundation and prerequisite for building intelligence.

I. Relationship between smart buildings and integrated wiring systems

Intelligent Building is an integrated system integrating the building automation system BAS, Communication Automation System CAS, and office automation system OAS.

BAS is an integrated system composed of multiple building control subsystems with the central control system as the core, it mainly includes power supply, air conditioning, lighting, fire fighting, elevator, water supply and drainage, alarm, LED/VGA display, smart card access control management, parking lot management, TV monitoring and other equipment control subsystems.

CAS is the "central nervous system" of the computer and communication systems in the building. It includes a communication network with a program-controlled switch as the core, a multi-function telephone, fax, and various types of terminals as the main equipment, as well as lan, workstation in the building, backbone communication network of high-speed broadband, and network interface equipment connected to the public network.

OAS is mainly composed of computer, multi-function telephone, fax machine, various types of terminals, audio and video storage devices and other office equipment plus the corresponding software, provides office functions such as text processing, document management, electronic accounting, email, electronic data exchange, electronic blackboard, and conference and television. To implement these functions, a smart building must first implement a structured integrated cabling system for the building. The structured Integrated Wiring System aims at the current and future cabling requirements of the smart building system, and uniformly plans and designs the wiring between the building and the building, in this way, the BAS, OAS, and CAS of the smart building can be organically combined to form an intelligent system of the building. It is obvious that structured cabling systems are integrated systems in multiple fields, including construction, computer, communication, and automatic control technology.

Ii. Several Basic Problems of structured cabling systems use various transmission media such as twisted pair wires and optical fiber cables, and various adapters, information sockets, distribution frames, and other devices to construct high-speed information channels in the building group.

(1) Main Features

1. comprehensiveness: it can be used as a transmission medium for voice, data, images and control signals.
2. modularization: the modular design of independent subsystems facilitates cabling expansion and reconfiguration.
3. Flexibility: Any information point can connect to different types of devices.
4. Openness: network products of any manufacturer are supported.

(2) standardization issues

In 1990s, Integrated Wiring had a series of general standards which were promulgated, greatly simplifying the complexity of engineering design and increased applicability. These standards include:

EIA \ TIA 568, ISO \ IEC 11801, TSB67
EMC Drirective,

Standard for structured integrated cabling systems for buildings and buildings in China

(3) Basic system composition and function division

Structured cabling systems can be divided into the following six subsystems based on their functions:

1. sub-systems between devices: configure a distribution frame to connect public networks, management subsystems, and architecture subsystems.
2. Main subsystems: cables are used to connect subsystems between devices and management subsystems at various layers.
3. Management Subsystem: The distribution frame of distribution lines distributed on each floor, and management of the horizontal subsystem cables at each layer and the Jumper between the vertical trunk subsystem cables.
4. horizontal subsystem: use cables to bring the workspace subsystem to the management subsystem.
5. Work subsystem: connect to user devices through standard information interfaces.
6. Building Group Management Subsystem: connect the sub-systems of various buildings with cables.

(4) several common types of structured integrated wiring systems

There are many types of structured cabling systems in the world, most of which are communication equipment manufacturers and computer equipment manufacturers, currently, AT&T, alcatel ibm, NT, and Digital products are widely used.

1. AT&T sans IMAX has three categories, five categories, cat5e UTP unshielded twisted pair cable, information socket, adapter, photoelectric distribution frame and other products, can support 10 Mbps, 155 Mbps (STM-1 level) 622 Mbps (STM-4 level) end-to-end application, UTP cable characteristic impedance is 100, using unshielded twisted pair balanced characteristics for electromagnetic interference protection. In addition, the AT&T megaimax series also include 625/125 multimode optical fiber with a nominal wavelength of nm and 1300nm single-mode optical fiber, supporting higher-speed applications. AT&T's replicimax is the first product to enter the Chinese market and use the most frequently.

2. alcatel acs uses shielded twisted pair wires (FTP) with a characteristic impedance of 120. The shielding layer and twisted pair wires are used together to defend against electromagnetic interference. The anti-electromagnetic interference performance is good, and the product series are complete, easy installation and promising market prospects. There are still many products for structured cabling systems.