ANSI-ISA-5.2-1976(R1992) Binary Logic Diagrams for

BinaryLogicDiagramsforProcessOperationsReaffirmed13July1992ANSI/ISA–5.2–1976(R1992)FormerlyANSI/ISA–S5.2–1976(R1992)AMERICANNATIONALSTANDARDISATheInstrumentation,Systems,andAutomationSociety–TMCopyright1976bytheInstrumentSocietyofAmerica.Allrightsreserved.PrintedintheUnitedStatesofAmerica.Nopartofthispublicationmaybereproduced,storedinaretrievalsystem,ortransmittedinanyformorbyanymeans(electronic,mechanical,photocopying,recording,orotherwise),withoutthepriorwrittenpermissionofthepublisher.ISA67AlexanderDriveP.O.Box12277ResearchTrianglePark,NorthCarolina27709ANSI/ISA-5.2-1976(R1992)BinaryLogicDiagramsforProcessOperationsISBN0-87664-331-4ANSI/ISA-5.2-1976(R1992)3PrefaceThisprefaceisincludedforinformationalpurposesandisnotpartofANSI/ISA-5.2-1976(R1992).ThisStandardhasbeenpreparedasapartoftheserviceofISAtowardagoalofuniformityinthefieldofinstrumentation.Tobeofrealvalue,thisdocumentshouldnotbestatic,butshouldbesubjecttoperiodicreview.Towardthisend,theSocietywelcomesallcommentsandcriticisms,andasksthattheybeaddressedtotheSecretary,StandardsandPracticesBoard,ISA,67AlexanderDrive,P.O.Box12277,ResearchTrianglePark,NC27709,Telephone[phone],e-mail:[e-mail]cesDepartmentisawareofthegrowingneedforattentiontothemetricsystemofunitsingeneral,andtheInternationalSystemofUnits(SI)inparticular,inthepreparationofinstrumentationstandards.TheDepartmentisfurtherawareofthebenefitstoUSAusersofISAStandardsofincorporatingsuitablereferencestotheSI(andthemetricsystem)intheirbusinessandprofessionaldealingswithothercountries.TowardthisendthisDepartmentwillendeavortointroduceSI-acceptablemetricunitsinallnewandrevisedstandardstothegreatestextentpossible.TheMetricPracticeGuide,whichhasbeenpublishedbytheAmericanSocietyforTestingandMaterialsasANSIdesignationZ210.1(ASTME380-76,IEEEStd.286-1975),andfurtherrevisions,willbethereferenceguidefordefinitions,symbols,abbreviation,andconversionfactors.ItisthePolicyofISAtoencourageandwelcometheparticipationofallconcernedindividualsandinterestsinthedevelopmentofISAStandards.ParticipationintheISAStandardsmakingprocessbyanindividualinnowayconstitutesendorsementbytheemployerofthatindividualofISAoranyoftheStandardswhichISAdevelops.ThesystemdescribedinthisStandardisintendedtomeettheneedsofpeoplewhoareconcernedwiththeoperationofprocesssystems.TheguidefortheStandardwasAmericanNationalStandardsInstitute(ANSI)StandardY32.14.1973,GraphicSymbolsforLogicDiagrams,whichthecommitteeattemptedtofollowsofaraspracticalfortheintendedusersoftheISAStandard.TheCommitteealsoreferredtoNationalElectricManufacturersAssociationStandardsICS1-102,GraphicSymbolsforLogicDiagrams,whosesymbolsbearresemblancetothoseoftheANSIStandard,andICS1-103,StaticSwitchingControlDevices,whichmayeventuallybesupplantedbyICS1-102.ReferencewasalsomadetoNationalFluidPowerAssociationRecommendedStandardT.3.7.68.2,GraphicSymbolsforFluidicDevicesandCircuits.Inaddition,numerousotherindustrialstandardswerereviewed.Thefollowingpeopleservedonthe1976SP5.2Committee:NAMECOMPANYGeorgePlatt,ChairmanBechtelPowerCompanyEdwardJ.BlahutProconIncorporated,PacificOperationsSanfordChalfinFluorCorporationLouisCosteaHunt-WessonFoods,IncorporatedRussellC.GreerBaileyMeterCompanyRoyLazarCarnationCompany4ANSI/ISA-5.2-1976(R1992)FrankMehle(deceased)ProconIncorporated,PacificOperationGaryL.PierceShellOilCompanyChuckSimmsFisherControlsCompanyJohnVanceUnitedProcessControlSystemsRobertWooLosAngelesDepartmentofWater&PowerThefollowingpeopleservedonthe1981(reaffirmation)SP5.2Committee:NAMECOMPANYRussellC.Greer,ChairmanBaileyControlsCompanyEdwardJ.BlahutBlahutEngineering,Inc.SanfordChalfinFluorCorporation(retired)LouisCosteaHunt-WessonFoods,Inc.RoyLazarCarnationCompanyGaryL.PierceShellOilCompanyGeorgePlattBechtelPowerCorporationCharlesSimmsFisherControlsCompanyJohnVanceComsyscoRobertWooLosAngelesDepartmentofWater&PowerThe1976editionofthisStandardwasapprovedbytheISAStandardsandPracticesBoardinNovember,1975.NAMECOMPANYW.B.Miller,ChairmanMooreProductsCompanyP.BlissPratt&WhitneyAircraftCompanyE.J.ByrneBrown&Root,Inc.W.CalderTheFoxboroCompanyB.A.ChristensenContinentalOilCompanyL.N.CombsE.I.duPontdeNemours&Company(retired)R.L.GalleyBechtelPowerCorporationR.G.Hand,SecretaryISAT.J.HarrisonIBMCorporationT.S.ImslandFisherControlsCompanyP.S.LedererNationalBureauofStandardsO.P.Lovett,Jr.E.I.duPontdeNemours&CompanyE.C.MagisonHoneywell,Inc.R.L.MartinTex-A-MationEngineeringInc.A.P.McCauleyGlidden-DurkeeDiv.SCMCorporationT.A.MurphyTheFluorCorporation,Ltd.R.L.NickensReynoldsMetalsCompanyG.PlattBechtelPowerCorporationA.T.UpfoldPolysarLtd.K.A.WhitmanAlliedChemicalCorporationANSI/ISA-5.2-1976(R1992)5ThisstandardwasreaffirmedbytheISAStandardsandPracticesBoardinMarch,1981.NAMECOMPANYT.J.Harrison,ChairmanIBMCorporationP.BlissConsultantW.CalderTheFoxboroCompanyB.A.ChristensenContinentalOilCompanyM.R.Gorden-ClarkScottPaperCompanyR.T.JonesPhiladelphiaElectricCompanyR.KellerBoeingCompanyO.P.Lovett,Jr.JordenValveE.C.MagisonHoneywell,Inc.A.P.McCauleyDiamondShamrockCorporationE.M.Ne