从全半双工RS -485适配器转换数据线

RS-485收发器（MAX3076或MAX13086）和电压监视器用作定时器（MAX641X）允许在一个更复杂的现有点，以点全双工电路功能点，点对多点半双工系统。Maxim>AppNotes>AmplifierandComparatorCircuitsCommunicationsCircuitsInterfaceCircuitsKeywords:RS-485adapter,fullduplex,point-to-multipointhalfduplex,voltagemonitorsJan06,2011APPLICATIONNOTE4554RS-485AdapterConvertsDataLinesfromFull-toHalf-DuplexBy:MassimoCaprioliAbstract:AnadaptercircuitconsistingofanRS-485transceiver(MAX3076orMAX13086)andavoltagemonitorusedasatimer(MAX641X)allowsanexistingpoint-to-pointfullduplexcircuittofunctioninamore-complexpoint-to-multipointhalf-duplexsystem.AsimilarversionofthisarticleappearedintheJune21,2007issueofElectronicDesignmagazine.MultiprotocolinterfaceICs(suchastheMAX3162fromMaxim)canbeusedtoconnectaU