Analysis of basic knowledge about Weak Current cabling in Smart Home

In fact, it is not difficult to find that the design of Weak Current Wiring is very important and must be paid attention to. This is the first step to achieve digital home. If you want to add any new demands after the decoration, you can only use the bright line. Of course, you may adopt wireless technology to achieve it, however, there are many problems that cannot be solved by wireless connection at present. Therefore, it is absolutely beneficial to master some Weak Current Wiring knowledge.

The Weak Current cabling system we described is the fourth essential household infrastructure after water, electricity, and gas. This is a fundamental and important task for building digital families. The weak current processing object is information transmission and control, which is characterized by low voltage, low current, low power, and high frequency. The main consideration is the effect of information transmission, such as the fidelity, speed, breadth, and reliability of information transmission. Generally, weak current mainly includes telephone lines, network cables, cable TV lines, audio/frequency lines, video lines, and audio lines. Weak Current pipe layout method is almost the same as strong electricity, also need to use PVC pipe. It is better to set the Line Section to 40% of the PVC pipe section. One more point is that you must never wear too many cables, and the strong and weak current cables cannot be worn in the same pipe. And try to separate them as much as possible. The distance between strong and weak current is at least 20 cm, otherwise there will be interference.

Functions of Weak Current Wiring

As the basis for digital home construction, cabling is designed to make our applications more convenient in the future. In general, interconnection is a basic requirement. Specific aspects include:

Aspects of Integrated Home Wiring

1. TV

This is understandable. TV is a common method for family entertainment and leisure. The old people and children in the family have different joys and sorrows, they all have their own fixed viewing channels and "exclusive topics" with TVs in each room, so there will be no remote control.

2. Phone number

Maybe you will say, isn't there a cordless phone? You can use it now, but no one will actually put the exquisite cordless phone in the kitchen or bathroom. In the past, when the room was full of yelling and the call was not going to happen again, your call freedom would be kept confidential. Each room can also communicate with each other.

3. Broadband Network

INTERNET, a word with a sense of the times, is also being integrated into our lives. Sitting at home through the Internet, you can easily work online, online entertainment, online shopping, truly enjoy home, everything is convenient and comfortable. Today, many domestic cities have successively opened broadband ip man, and the concept of "broadband information community" has become the choice of the current family. What we can provide is not only broadband to the household, but also "broadband to the table" and "broadband to the bed" to wherever you need it! Make your online life better!

4. Home Theater

Many of my friends ignore the line prefill During the decoration process. After the decoration is complete, they find that the two sides cannot be solved. If the cables are not good, it is not safe to pull the cables. If you do the Redo, it will take time and money not to say, it may damage the overall decoration effect. Therefore, before the decoration, do not forget the wiring project of this system if you like music.

5. video sharing with redteeth Control

Many of my friends think that watching movies is just in the living room. Is it so troublesome? You have to go to the DVD in the room to control it. The simple things become complicated. Now you have an advanced infrared learning remote control device that allows you to easily control devices outside your room without getting up.

6. earphone access

You can also listen to your favorite programs (music) in the middle of the night without affecting others' rest.

7. Background Music

When you get home after a day of fatigue, you can relax, listen to music, and feel the peace and warmth of your home. The work pressure of your day also fades away. Background Music is designed to provide music points for you in any room including the kitchen, bathroom, Study Room, and balcony according to your needs, through one or more audio sources, transfers high-fidelity music to each room, allowing you to independently control the volume of each room as needed.

How many planning interfaces are required?

We should consider the future needs when designing cabling. For example, in addition to setting information points next to the computer desk and sofa, do you need to set up information points in the kitchen to adapt to occasional Internet access during breakfast in the kitchen or smart refrigerators in the future? In the TV cabinet behind the arrangement of information is also a very eye-catching approach, from the game machine, set-top box to the TV, after a long time, we will see the configuration of RJ-45 Ethernet interface of various household appliances, currently, the power line network has entered the actual stage.

Each household can introduce 2 Category-5 4 pairs of twisted-pair cables, and 2-core optical fiber cables can also be set if necessary; 1-2 75 Ω coaxial cables and corresponding sockets can be laid simultaneously; wall-embedded Home Information Access boxes should be set for each household. No less than one information outlet, or optical cable outlet, and one cable and TV outlet should be set for each bedroom, study, living room, and dining room, it can also be set as needed by users; the main toilet should also be set up for telephone information outlets; each information outlet, optical cable outlet or cable TV outlet to wall buried Home Information Access box, one category-5 4 pair twisted cable, two-core optical cable, or one 75 ohm coaxial cable are laid each time. The wall-buried household information receiving box should be in place once to meet long-term needs.

Basic wiring knowledge

1. The purpose of household Weak Current Wiring is to share network, telephone, cable TV and other resources. The best three interfaces are available for the main room. Network, telephone, and cable TV home-based frequency-division equipment is usually multiple in and out of four, which is expensive ), generally, two rooms and one living room can be used in the living room, master bedroom, secondary bedroom, network, telephone, TV interface, restaurant TV interface, and toilet phone interface. If there are more rooms, you can choose to reserve them. You can also run the cables out first and put them in the weak current distribution box. You can change the plug to each room when necessary. Audio and video are different. Although audio and video can be shared by different frequency, they can only provide signals to one terminal at a time at home. I don't think it is necessary to leave an interface for each room.

2. In order to achieve the shared and interconnected requirements, the Weak Current Wiring must use a frequency division or exchange device. The Intranet and Internet Exchange devices of the network are for the router LAN) or the modem ADSL), that is, the cat. The price is about 300 yuan. The intranet switch device is a switch or hub, use a vswitch better. The price is less than 200 yuan, and the hub can be purchased from 80 to 90 now. There are vrouters with built-in vswitches and cats with built-in routes and vswitches on the market. The price is RMB-. We recommend that you use them. The switch and division equipment of telephones are switches or distribution boxes, which are also good switches. The price is-yuan. The distribution boxes are very cheap, but the rooms cannot communicate with each other or contain more than three telephones; the TV's frequency-division device is a frequency-division device. Everyone should be aware of it.

3. The weak current line should adopt star wiring, radiating from the switch and frequency division equipment to each port. It is recommended that various devices be placed in the same place for simple cabling and convenient maintenance. At present, there are usually weak current distribution boxes at the door of the new house, and the connectors of various lines are reserved in the distribution box; some are not reserved connectors, but the lines are transferred around in the box, and then lead to a room. It doesn't matter, cut the line IN the box, one end of the household is connected to the IN Plug-IN of the switch division equipment, the other end is connected to the OUT plug-IN, continue to use. We can transform the weak current distribution box and install the switch and frequency division equipment. Pay attention to the power usage of most devices. The power outlet should be left in the weak current distribution box. The basic functions of the current weak current distribution box on the market are not good, mainly in terms of Network. Although there is a four-in-one interface, it is only a distribution frame and cannot implement internal intercommunication and multiple computers access the Internet at the same time, it is more expensive than DIY one. Some houses do not have weak current distribution box wiring, which makes it troublesome to put all kinds of equipment next to the account, or to bring the account line together first.

4. Direct Dialing is used for accessing the Internet. ISDN is also called a one-line connection. ADSL is also called a super one-line connection. LAN is used for accessing the Internet through a network cable, and wired and power lines are used for accessing the Internet. The first two are out of date and do not need to be considered. The last two are not popular yet, but some are. ADSL and LAN are currently mainstream, and the theoretical transmission speed of ADSL is 8 Mb/s, LAN can reach 100 Mb/s, but China Telecom generally only activates bandwidth of Mbit/s. In actual use, the bandwidth is limited by the line conditions, number of users, and the egress width of China Telecom, at present, ADSL and LAN are not necessarily used quickly. However, network-based Internet access should be the development direction. If possible, it should be preferred.

5. if you want to connect to the Internet in different rooms at the same time, you have two options: one is to install a self-built vro or cat, the other is to install simulation software on one of the computers and use a computer as a proxy server, the cost is that if other computers access the Internet, the proxy server must be on. We recommend that you use the first method. In addition, cats sent by ADSL Telecom generally have to purchase them separately without a switch.

6. Eight-core network cable for Weak Current cabling; telephone lines; coaxial cable for cable and television. If there is a weak current distribution box, you can use one of the three cables for convenient use. The network cable is eight cores. Currently, four trees in the family have no practical use. You can use two cables as telephone lines, but the effect is not as good as that of a single cable. The telephone line also has 2-core, 4-core, and 6-core lines. It is also useful for two lines at home. The quality of cables is very important, especially coaxial cables). In my experience, if signal interference or attenuation is found, the problem may be caused by more than 70% of online cables, and the possibility of machine faults is small. But now there are a lot of fake and inferior cables, so you must pay attention to them when buying them.

7. for Weak Current Wiring, special plugs and sockets should be used. For Network cables, RJ45 headers are also called ampu headers/crystal headers) and RJ45 headers and modules. For telephone lines, refer to the 11th headers and corresponding sockets; to install the RJ45 head, use special wire pliers and wire tweezers. If you want to install it yourself, you have to buy it. And many weak current lines, sockets are not sold in the decoration market, that is, there is too expensive, you can go to Anshan West Road to see, a lot cheaper. Note that the ampu products on the market are basically not true.

8. Briefly Talk about audio and video wiring. Audio Devices include the signal source CD, VCD, DVD, MP3, etc.), power amplifier and speaker, connected by audio cable. From the original signal to the power amplifier, a single audio cable is generally used, also known as the phone line; from the power amplifier to the speaker, it is generally used as a dual-strand audio cable, also known as the audio cable; when installing the speaker, pay attention to the selection of the matching wiring bar. From the power amplifier to the main speaker, it is best to directly connect, do not use the wiring bar; to the surround can be used, or do not need, but the line should be as short as possible, as long as possible. Video devices include original VCD, DVDs, video recorders, video cameras, TV boxes, satellite receivers, computers and even game consoles) and video terminals, computers, monitors, and projectors ). There are many types of cables and interfaces for video input and output, mainly including D-Sub 15 pin interfaces and VGA plugs and sockets like computers); RCA compound video interfaces; sport five-core Lotus ports ); component Video port. All interfaces can be used. The best effect is D-Sub, and later HDTV high definition TV). D-Sub ports and cables must be used for devices. The worst result is RCA, which is acceptable to us. If your home video signal is not placed in the same place as the playback terminal, such as using a projector), you have to make cabling. You can buy audio and video plugs, but it is hard to buy sockets, all audio and video devices do not need to be connected through a socket. If it does not affect the appearance, it is best to directly connect devices with cables.

9. During cabling, the cables in the hidden box should be left at around 10 centimeters. If an error occurs during connection, the cables can be recovered. If you have not considered the future Weak Current cabling, you can arrange the channel and dark box, wire in advance in the pipeline, and leave one in the dark box with a blank panel; and one in the distribution box, convenience for future extension. It doesn't matter if you do not have wiring for the Weak Current during the decoration and have such requirements. All kinds of wireless transmission devices are available now, but they are relatively expensive and the standards need to be unified, it may become popular in a few years.