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Como elixir un cable Ethernet de par trenzado nun proxecto de instalación de cámara de vixilancia de rede?

2021-02-01

Como escoller un par trenzado Ethernet Ccapaznun proxecto de instalación de cámaras de vixilancia de rede?

 

Nowadays, most of the installed network cameras still use the network ccapaz for transmission, and the most commonly used are the super five and six ccapazs. If the 100M network we usually use the super five twisted pair, the gigabit network uses the sixpar trenzado.

 

 

Here we talk about the national standard super five and six wire diameters, because the wire diameter of the network ccapaz is availcapaz in all kinds of markets, and there are many non-standard ones. The national standard super five wire diameter is 0.5, and the six national standard wire diameter is 0.56. In theory, the thicker the wire diameter, the longer the transmission distance. But the transmission distance is also closely related to the material of the network ccapaz.

 

O material do Ethernet Ccapaz :

Materiais comúns no mercado: aliaxe; aluminio de alta condutividade; prata de alta condutividade; cobre puro; cobre sen osíxeno.

O prezo máis baixo da aliaxe é o ferro e a calidade tamén é o peor.

High-conductivity aluminum is commonly known as copper-clad aluminum, which is mainly aluminum, easy to oxidize, and the resistance will increase after oxidation. This is why the copper clad aluminum network ccapaz is used to install the monitoring, there is no problem when it is newly installed, and there will be occasional signal problems after a while.

O material da prata de alta condutividade tamén é aluminio e a calidade é mellor que o aluminio revestido de cobre. Este é o nome e non hai prata no material.

 

A calidade do cobre puro é mellor que a do aluminio, pero a resistencia aínda é relativamente grande.

Oxygen-free copper, also called red copper. At present, the best network ccapaz of the national standard, it is recommended that you choose this network ccapaz for monitoring.

 

¿Sabes escoller ou identificar o material?

Ademais de mercar unha mellor marca a un prezo máis alto, se atopas un comerciante que non é amable, tes que probalo ti mesmo. O método de detección comúnmente usado é medir a resistencia cun multímetro.

A box of network ccapazs is normally 300 meters (in fact, it should be about 305), the resistance of the whole box is tested, the resistance value of the super five should be 27-30 ohms, and the six types of ccapazs should be about 21-24 ohms.

 

The relicapaz transmission distance of the network ccapaz is about 100 meters. Do not hear on the Internet that others transmit 120 meters, 150 meters is no problem. The transmission distance of the signal on the network ccapaz will be attenuated and data packets will be lost. There may be an image after 100 meters, but there will be problems in the future and maintenance will be very troublesome.