RS485 电缆 RS485 cable
铠装双绞屏蔽电缆|RS485电缆ASTP在低速、短距离、无干扰的场合可以采用普通的双绞线，反之，在高速、长线传输时，则必须采用阻抗匹配（一般为120Ω）的RS485电缆（STP-120Ω（for RS485 & CAN） one pair 18 AWG），而在干扰恶劣的环境下还应采用铠装型双绞屏蔽电缆（ASTP-120Ω（for RS485 & CAN） one pair 18 AWG）。在使用RS485接口时，对于特定的传输线路，从RS485接口到负载其数据信号传输所允许的zui大电缆长度与信号传输的波特率成反比，这个长度数据主要是受信号失真及噪声等影响所影响。理论上，通信速率在100Kbps及以下时，RS485的zui长传输距离可达1200米，但在实际应用中传输的距离也因芯片及电缆的传输特性而所差异。在传输过程中可以采用增加中继的方法对信号进行放大，zui多可以加八个中继，也就是说理论上RS485的zui大传输距离可以达到9.6公里。如果真需要长距离传输，可以采用光纤为传播介质，收发两端各加一个光电转换器，多模光纤的传输距离是5~10公里，而采用单模光纤可达50公里的传播距离。
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：毕国栋 Legal person: Bi Guodong
厂长：毕均平 Director: Bi Junping
：王艳 Sales Manager: Wang Yan

公 司:天津市电缆总厂*分厂 Company: Tianjin Cable General Factory first branch factory
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：王艳 Sales Manager: Wang Yan
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邮　　箱:haozhenyu0501 : haozhenyu0501
:526183977
地 址:河北省廊坊市大城县毕演马电缆工业区 Address: Hebei province Langfang city county completed his MA cable industrial zone
邮 编:065900 Postal Code: 065900
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