Transcription of PROFIBUS Electrical-Layer Solutions (Rev. A)
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PROFIBUS Electrical-Layer Solutions (Rev. A)
1 IntroductionApplicationReportSLLA177A May2005 , ,suchassignalinglevels,buscapacitance,fa ulttolerance, (CH1)andB(CH2) (CMV).. ,whetherinprocessautomation,factoryautom ation,ormotioncontrol, ,referredtotheactuator/sensorlevel,thefi eldbusdirectlySLLA177A May2005 Level NetworksArea ControllerCell or Fieldbus NetworkHOSTCNCPCPCPLCPCF ieldbus ,thefieldorcelllevel, , , PROFIBUS wasestablishedasanationalstandard(DIN192 45) (EN50170). PROFIBUS wasadoptedinternationallyinIEC61158andIE C61784, ,thetermPROFIBUS hasbecomeabroadterm, ,theonlyPROFIBUS applicationwasPROFIBUSFMS(fieldmanagemen tsystem).Now,otherapplicationssuchasPROF IBUSDP(1)(factoryautomation),PROFIBUSPA( processautomation),andPROFI drive(motorcontrol) ,MBP(Manchesterencodingbuspowered),TIA/E IA-485(RS-485),orRS-485IS(intrinsicsafet y) , ,onemustunderstandthephysicallayerandhow thetransceiverispartofthatlayer.
www .ti.com Choosing a PROFIBUS Transceiver 2.1.1.2 VOD and PROFIBUS DP Test Guidelines Both the slave and master PROFIBUS DP test specifications state that the differential voltage between A-
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