How is the network cable and twisted pair of LED display screen spliced
Time:2018-11-30
Views:181
LED display is composed of one box or one LED module. In the process of splicing, it is inevitable to use network cables and all kinds of twisted pair cables. So for LED display engineers, how to splicing these network cables and twisted pair cables?The following LED screen manufacturer shenzhen derensel will give you a detailed introduction:
All kinds of network connection line sequence
A wiring mode is applied in the entire network wiring, but the network connection with RJ45 terminals at both ends is universal in the network, whether it adopts terminal connection mode A or terminal connection mode B.In practical application, most of them use T568B standard, which is generally considered to be better for electromagnetic interference shielding.
568B standard network cable
In addition, the computer communication only USES 1.2.3.6 (white orange, orange, white green, green), 10 gigabit network card these four lines, the gigabit network card must want 8 lines, therefore, can use other 4 as telephone lines, in order to save wiring costs.
1. Normal line (i.e., straight line) : standard 568B line sequence is selected at both ends
The line order from left to right is (568B) : white orange, orange, white green, blue, white blue, green, white brown, brown
The line order from left to right is (568B) : white orange, orange, white green, blue, white blue, green, white brown, brown
2. Network measuring instrument jump light: 1, 2, 3, 6 to 1, 2, 3, 6
Reverse line (i.e. cross line) : select the line order of 568B at one end and 568A at the other end
The line order from left to right is (568B) : white orange, orange, white green, blue, white blue, green, white brown, brown
The line order from left to right is (568A) : white green, green, white orange, blue, white blue, orange, white brown, brown
3. Network measuring instrument jump light: 1, 2, 3, 6 to 3, 6, 1, 2
Normal line (i.e., straight line) : standard 568B line order is selected at both ends
The line order from left to right is (568B) : white orange, orange, white green, blue, white blue, green, white brown, brown
The line order from left to right is (568B) : white orange, orange, white green, blue, white blue, green, white brown, brown
4. Network measuring instrument jump light: 1, 2, 3, 4, 5, 6, 7, 8 to 1, 2, 3, 4, 5, 6, 7, 8
Reverse line (i.e. cross line) : select the line order of 568B at one end and 568A at the other end
The line order from left to right is (568B) : white orange, orange, white green, blue, white blue, green, white brown, brown
The line order from left to right is (568A) : white green, green, white orange, blue, white blue, orange, white brown, brown
5. Network measuring instrument jump light: 1, 2, 3, 4, 5, 6, 7, 8 to 3, 6, 1, 4, 5, 2, 7, 8
Normal line (i.e., straight line) : standard 568B line order is selected at both ends
The line order from left to right is (568B) : white orange, orange, white green, blue, white blue, green, white brown, brown
The line order from left to right is (568B) : white orange, orange, white green, blue, white blue, green, white brown, brown
6. Network measuring instrument jump light: 1, 2, 3, 4, 5, 6, 7, 8 to 1, 2, 3, 4, 5, 6, 7, 8
Reverse line (i.e. cross line) : select the line order of 568B at one end and 568A at the other end
The line order from left to right is (568B) : white orange, orange, white green, blue, white blue, green, white brown, brown
The line order from left to right is (568A) : white green, green, white orange, white brown, brown, orange, blue, white blue
7. Network measuring instrument jump light: 1, 2, 3, 4, 5, 7, 8 to 3, 6, 1, 7, 8, 2, 4, 5
Correct selection of straight through line and cross line:
8, the meaning of the English letters
PC stands for computer, HUB stands for HUB, SWITCH stands for SWITCH and ROUTER stands for ROUTER.
Pc-pc: crossover line
PC-HUB: through line
HUB-HUB common port: crossover line
HUB-HUB (normal port - level connection) : through line
HUB-HUB (cascade - cascade) : crossover line
HUB-SWITCH: crossover line
HUB（級聯口）-SWITCH： 直通線
SWITCH-SWITCH： 交叉線
SWITCH-ROUTER： 直通線
ROUTER-ROUTER： 交叉線
9. Problems involved in the application of twisted pair wires in gigabit network
(1) gigabit trunk switch, connect to gigabit branch switch, with what line?CAT6 (CAT6).
(2) gigabit backbone switch, connect to the gigabit switch, with what line?CAT6 (CAT6).
(3) gigabit backbone switch, connect to the new server, with what line?CAT6 (CAT6).
(4) gigabit backbone switch, connect to the old server, with what line?CAT5E. 100Mbps.
(5) gigabit exchange, connect to the new machine, with what line?The budget USES 6 kinds of line (CAT6) more, should use exceed 5 kinds at least (CAT5E).
(6) 100-megabyte switch, connect to the old machine, with what line?Use super 5 category. Some can be fixed before, if the quality is too bad, cut off, new cloth over super 5 category (CAT5E).
10. Common twisted pair wires
Twisted pair cables are commonly used for 3 types of cables, 5 types of cables and super 5 types of cables, and the latest 6 types of cables. The former has a fine diameter while the latter has a thick diameter. The models are as follows:
1) class a line: mainly used for voice transmission (class a standard is mainly used for telephone cables before the early 1980s), which is different from data transmission.
2) secondary line: 1MHZ transmission frequency is used for voice transmission and data transmission with a maximum transmission rate of 4Mbps. It is common to see old tokens using 4Mbps standard token transfer protocol.
3) three types of cables: refer to cables specified in ANSI and EIA/TIA568 standards. The transmission frequency of this cable is 16MHz, which is used for voice transmission and the data transmission with the maximum transmission rate of 10Mbps is mainly used for 10BASE--T.
4) four types of cables: the transmission frequency of such cables is 20MHz, and the data transmission for voice transmission and the maximum transmission rate of 16Mbps is mainly used for token based LAN and 10base-t / 100base-t.
5) five types of cables: these cables increase the winding density, coat a kind of high-quality insulation material, the transmission rate of 100MHz, used for voice transmission and data transmission with the highest transmission rate of 10Mbps, mainly used for 100base-t and 10base-t networks.This is the most commonly used Ethernet cable.
6) super five lines: super five lines have low attenuation, less crosstalk, higher ratio of attenuation to crosstalk (ACR), signal to noise ratio (SNR), and smaller delay error, and their performance is greatly improved.The super 5 line is mainly used for gigabit Ethernet (1000Mbps).
7) six types of cables: the transmission frequency of such cables is 1MHz ~ 250MHz, and the comprehensive attenuation crossplot ratio (ps-acr) of the six types of wiring systems at 200MHz should have a large amount of allowance, which provides twice as much bandwidth as that of the super-five types.The transmission performance of the six types of cabling is far higher than that of the super five types of standards, and it is most suitable for applications with a transmission rate higher than 1Gbps.
One important difference between the six classes and the superfive classes is that they improve the performance of crosstalk and echo loss. For the new generation of full-duplex high-speed network applications, excellent echo loss performance is extremely important.The basic link model was removed from the six standards, and the star-shaped topology was adopted in the wiring standard. The wiring distance required was: the length of the permanent link could not exceed 90m, and the channel length could not exceed 100m.
Currently, TWISTED PAIR can be divided into the unshielded TWISTED PAIR (UTP = UNSHILDED TWISTED PAIR) and shielding twisted-pair (STP = SHIELDED TWISTED PAIR).The outer layer of shielded twisted pair cable is covered by aluminum and platinum to reduce radiation, but it cannot completely eliminate radiation. The price of shielded twisted pair cable is relatively high, and it is more difficult to install than non-shielded twisted pair cable.
11. Unshielded twisted pair cable has advantages
(1) no shielding coat, small diameter, saving space;
(2) light weight, easy to bend, easy to install;
(3) minimize or eliminate crosstalk;
(4) flame retardant;
(5) with independence and flexibility, it is suitable for structural integrated wiring.
In these two categories are divided into 100 ohm cable, catamaran cable, large logarithmic cable, 150 ohm shielded cable and so on.
The above is shenzhen derun sell co., ltd. for you to share the LED screen network cable, twisted pair of how to splice knowledge, if you are interested in how much money to do a square LED screen, welcome to inquire!
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