IEEE110111998IEEEStandardforMechanicalCoreSpecicat

TheInstituteofElectricalandElectronicsEngineers,Inc.345East47thStreet,NewYork,NY10017-2394,USACopyright©1998bytheInstituteofElectricalandElectronicsEngineers,Inc.Allrightsreserved.Published18December1998.PrintedintheUnitedStatesofAmerica.Print:ISBN0-7381-1449-9SH94691PDF:ISBN0-7381-1450-2SS94691Nopartofthispublicationmaybereproducedinanyform,inanelectronicretrievalsystemorotherwise,withoutthepriorwrittenpermissionofthepublisher.IEEEStd1101.1-1998(RevisionofIEEEStd1101.1-1991)IEEEStandardforMechanicalCoreSpeciÞcationsforMicrocomputersUsingIEC60603-2ConnectorsSponsorMicroprocessorandMicrocomputerStandardsSubcommitteeoftheIEEEComputerSocietyApproved28September1998IEEE-SAStandardsBoardAbstract:ThebasicdimensionsofarangeofmodularsubracksconformingtoIEC60297-3(1984-01)andIEC60297-4(1995-03)formountinginequipmentaccordingtoIEC60297-1(1986-09)andANSI/EIA310-D-1992,togetherwiththebasicdimensionsofacompatiblerangeofplug-inunits,printedboards,andbackplanes,arecovered.Thedimensionsandtolerancesnecessarytoensuremechanicalfunctioncompatibilityareprovided.Thisstandardofferstotalsystemintegrationguide-lineswithattendantadvantages,suchasreductionindesignanddevelopmenttime,manufacturingcostsavings,anddistinctmarketingadvantages.Keywords:compatibility,mechanicalinterchangeability,plug-inunits,subracksIEEEStandardsdocumentsaredevelopedwithintheIEEESocietiesandtheStandardsCoordinat-ingCommitteesoftheIEEEStandardsAssociation(IEEE-SA)StandardsBoard.Membersofthecommitteesservevoluntarilyandwithoutcompensation.TheyarenotnecessarilymembersoftheInstitute.ThestandardsdevelopedwithinIEEErepresentaconsensusofthebroadexpertiseonthesubjectwithintheInstituteaswellasthoseactivitiesoutsideofIEEEthathaveexpressedaninter-estinparticipatinginthedevelopmentofthestandard.UseofanIEEEStandardiswhollyvoluntary.TheexistenceofanIEEEStandarddoesnotimplythattherearenootherwaystoproduce,test,measure,purchase,market,orprovideothergoodsandservicesrelatedtothescopeoftheIEEEStandard.Furthermore,theviewpointexpressedatthetimeastandardisapprovedandissuedissubjecttochangebroughtaboutthroughdevelopmentsinthestateoftheartandcommentsreceivedfromusersofthestandard.EveryIEEEStandardissub-jectedtoreviewatleasteveryÞveyearsforrevisionorreafÞrmation.WhenadocumentismorethanÞveyearsoldandhasnotbeenreafÞrmed,itisreasonabletoconcludethatitscontents,althoughstillofsomevalue,donotwhollyreßectthepresentstateoftheart.UsersarecautionedtochecktodeterminethattheyhavethelatesteditionofanyIEEEStandard.CommentsforrevisionofIEEEStandardsarewelcomefromanyinterestedparty,regardlessofmembershipafÞliationwithIEEE.Suggestionsforchangesindocumentsshouldbeintheformofaproposedchangeoftext,togetherwithappropriatesupportingcomments.Interpretations:OccasionallyquestionsmayariseregardingthemeaningofportionsofstandardsastheyrelatetospeciÞcapplications.WhentheneedforinterpretationsisbroughttotheattentionofIEEE,theInstitutewillinitiateactiontoprepareappropriateresponses.SinceIEEEStandardsrep-resentaconsensusofallconcernedinterests,itisimportanttoensurethatanyinterpretationhasalsoreceivedtheconcurrenceofabalanceofinterests.Forthisreason,IEEEandthemembersofitssocietiesandStandardsCoordinatingCommitteesarenotabletoprovideaninstantresponsetointerpretationrequestsexceptinthosecaseswherethematterhaspreviouslyreceivedformalconsideration.Commentsonstandardsandrequestsforinterpretationsshouldbeaddressedto:Secretary,IEEE-SAStandardsBoard445HoesLaneP.O.Box1331Piscataway,NJ08855-1331USAAuthorizationtophotocopyportionsofanyindividualstandardforinternalorpersonaluseisgrantedbytheInstituteofElectricalandElectronicsEngineers,Inc.,providedthattheappropriatefeeispaidtoCopyrightClearanceCenter.Toarrangeforpaymentoflicensingfee,pleasecontactCopyrightClearanceCenter,CustomerService,222RosewoodDrive,Danvers,MA01923USA;[phone].Permissiontophotocopyportionsofanyindividualstandardforeducationalclass-roomusecanalsobeobtainedthroughtheCopyrightClearanceCenter.Note:Attentioniscalledtothepossibilitythatimplementationofthisstandardmayrequireuseofsubjectmattercoveredbypatentrights.Bypublicationofthisstandard,nopositionistakenwithrespecttotheexistenceorvalidityofanypatentrightsinconnectiontherewith.TheIEEEshallnotberesponsibleforidentifyingpatentsforwhichalicensemayberequiredbyanIEEEstandardorforconductinginquiriesintothelegalvalidityorscopeofthosepatentsthatarebroughttoitsattention.Copyright©1998IEEE.Allrightsreserved.iiiIntroduction(ThisintroductionisnotapartofIEEEStd1101.1-1998,IEEEStandardforMechanicalCoreSpeciÞcationsforMicro-computersUsingIEC60603-2Connectors.)Withtheintroductionofinternational(IEC)microcomputerarchitecturesbasedontheÒEuroboardformfac-tor,ÓtheIEEEComputerSocietyTechnicalCommitteeonMicroprocessorsandMicrocomputersfounditappropriatetoformaseparateIEEEstandardtoexpandupontheIEC60297seriesofstandards,Dimensionsofmechanicalstructuresofthe482.6mm(19in)series.(SeeClause3ofthisstandard.)Thisstandardprovidesdesignengineerswiththedimensionsandtolerancesnecessarytoensuremechanicalfunctioncompatibility.Thisstanda