弱电常用通讯协议

新春

请问各位大虾。。。。 咱们弱电常用的通讯协议有哪些啊。各有什么优缺点呢。通讯距离是多少呢



          深圳博思凯电子  专业一卡通提供商 门禁 停车场管理系统  电梯门禁  银行门禁 
    QQ:317963882  TEL:13265583442

弱电之家

RS232只能传近距离，约15米以内，通讯稳定可靠，简单成本低；  RS485可传较远距离，一般1公里都不成问题，而且支持总线制。另外还有RS422等协议。

rainbob

学习

renyong

没有资料吗？想学学……

Chemicals
Chemicals

  Additive

  Adhesive

  Agricultural Chemicals

    Fungicide & Bactericide

    Herbicide & Weedicide

    Pesticide & Insecticides

    Plant Growth Regulator

  Artificial Graphite & Active Carbon

  Biochemical

  Chemical Auxiliary & Catalyst

    Catalyst & Active Agent

      Chemical Auxiliary

    Desiccant & Sorbent

    Surface Disposal Agent

  Chemical Filling

  Chemical Reagent

  Chemical Stocks

  Chemical Waste

  Essential Oil, Balsam & Fine Chemicals

  Explosive & Combustible

  Fertilizer

  Flux & Impregnant

  Inorganic Chemicals

    Acid

    Alkali

    Elementary Substance

    Gas

    Inorganic Salt

    Oxide

  Lab Supplies

  Lubricant

  New-type Chemical Material

  Organic Chemicals

    Alcoholate & Derivative

    Benzene & Derivative

    Carbohydrate

    Carboxylic Acid & Derivative

    Ester & Derivative

    Hydrocarbon & Derivative

    Hydroxybenzene, Aether, Aldehyde & Ketone

    Organic Intermediate

  Other Chemicals

  Paint & Coating

  Petrochemical Refining

  Pharmaceutical Chemicals

  Pharmaceutical Intermediate

  Photographic & Sensitive Product

  Pigment & Dye

  Plastic & Polymer

    Household Plastic Products

    Plastic Materials

    Plastic Products

    Polymer & Resin


  Synthetic Fiber


  Printing & Publishing Supplies

  Rosin & Forest Chemical

  Rubber & Rubber Products

    Household Rubber Products

    Rubber Materials

    Rubber Products

    Tyre

  Specialized Preparation

  Wax & Fat