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RS485 電纜   RS485 cable

鎧裝雙絞屏蔽電纜|RS485專用電纜ASTP在低速、短距離、無干擾的場合可以采用普通的雙絞線，反之，在高速、長線傳輸時，則必須采用阻抗匹配（一般為120Ω）的RS485專用電纜（STP-120Ω（for RS485 & CAN） one pair 18 AWG），而在干擾惡劣的環境下還應采用鎧裝型雙絞屏蔽電纜（ASTP-120Ω（for RS485 & CAN） one pair 18 AWG）。在使用RS485接口時，對于特定的傳輸線路，從RS485接口到負載其數據信號傳輸所允許的最大電纜長度與信號傳輸的波特率成反比，這個長度數據主要是受信號失真及噪聲等影響所影響。理論上，通信速率在100Kbps及以下時，RS485的最長傳輸距離可達1200米，但在實際應用中傳輸的距離也因芯片及電纜的傳輸特性而所差異。在傳輸過程中可以采用增加中繼的方法對信號進行放大，最多可以加八個中繼，也就是說理論上RS485的最大傳輸距離可以達到9.6公里。如果真需要長距離傳輸，可以采用光纖為傳播介質，收發兩端各加一個光電轉換器，多模光纖的傳輸距離是5~10公里，而采用單模光纖可達50公里的傳播距離。

Tianjin Cable General Factory first branch factory specializing in the production of communication cable for mine; mine control cable signal cable; mine; mine explosion-proof telephone line; mine explosion-proof communication cables, mining cable; communication cables for coal mines; mining telephone cable; communication cable signal cable for mine; mine; control cable for mine; mine monitoring cable for mine monitoring; the explosion-proof cable; cable; mine fire retardant cable; MHYV; MHYAV; MHYA32 type mine communication cable; MHYV; MHYVR; MHYVP; MHYVRP; MHY32 type mine signal cable (mine communication cable); MKVV; MKVV22; MKVV32; MKVVR mine control cable products are "coal-mark" certificate, complete specifications, products widely used in the system of coal mine and coal mine monitoring system; to the coal company, all over the country mining group; and a number of mining equipment company related products, has established the long-term cooperation, the product has won praise and trust of users! At the same time, I produced the whole city communication cable, telephone cable, large number of communication cable, computer cable, power line communication equipment, railway signal cable, lighting line airport, various documents complete, reliable quality!!

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公 司:天津市電纜總廠第一分廠  Company: Tianjin Cable General Factory first branch factory