RS485 電纜 RS485 cable
鎧裝雙絞屏蔽電纜|RS485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電纜（STP-120Ω（for RS485 & CAN） one pair 18 AWG），而在干擾惡劣的環(huán)境下還應(yīng)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(fù)載其數(shù)據(jù)信號傳輸所允許的zui大電纜長度與信號傳輸?shù)牟ㄌ芈食煞幢?，這個長度數(shù)據(jù)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zui長傳輸距離可達(dá)1200米，但在實際應(yīng)用中傳輸?shù)木嚯x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，zui多可以加八個中繼，也就是說理論上RS485的zui大傳輸距離可以達(dá)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(zhì)，收發(fā)兩端各加一個光電轉(zhuǎn)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(dá)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 ephone line; mine explosion-proof communication cables, mining cable; communication cables for coal mines; mining ephone 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, ephone 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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法人：畢國棟 Legal person: Bi Guodong
廠長：畢均平 Director: Bi Junping
：王艷 Sales Manager: Wang Yan

公 司:天津市電纜總廠*分廠 Company: Tianjin Cable General Factory first branch factory
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：王艷 Sales Manager: Wang Yan
phone:
銷售副:郝振宇 Sales Manager: Hao Zhenyu
手 機: Hand machine:
郵　　箱:haozhenyu0501 : haozhenyu0501
:526183977
地 址:河北省廊坊市大城縣畢演馬電纜工業(yè)區(qū) Address: Hebei province Langfang city county completed his MA cable industrial zone
郵 編:065900 Postal Code: 065900
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