标签: 良好接地
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良好接地不如简单隔离？TexasInstrumentsIncorporatedInterface(DataTransmission)Whengoodgroundsturnbad―isolate!ByThomasKugelstadtSeniorApplicationsEngineerIndustrialcommunicationviafieldbus-transceiversystemsconvertingthelinevoltageintotherequiredDCoutput.oftenrequireslongtransmissionlines.Designers,unawareFigure1showsasimplifiedblockdiagramofalow-costofthelargeground-potentialdifferences(GPDs)betweenswitched-modepowersupply(SMPS)typicallyusedinremotebuslocations,eitherrelyonthelocalearthgroundpersonalcomputers,laserprinters,andotherequipment.asareliablesignalreturnpathor……
