IEEE1101111998IEEEStandardforMechanicalRearPluginU

IEEEStd1101.11-1998IEEEStd1101.11-1998IEEEStandardforMechanicalRearPlug-inUnitsSpeciÞcationsforMicrocomputersUsingIEEE1101.1andIEEE1101.10EquipmentPracticeIEEEComputerSocietySponsoredbytheBusArchitectureStandardsCommittee30June1998SH94609ToorderIEEEstandardsÉCall1.800.678.IEEE(4333)intheUSandCanada.OutsideoftheUSandCanada:1.732.981.0600Toorderbyfax:1.732.981.9667IEEEbusinesshours:8a.m.Ð4:30p.m.(EST)Foron-lineaccesstoIEEEstandardsinformationÉViatheWorldWideWeb::stdsbbs.ieee.orgISBN0-7381-0179-6TheInstituteofElectricalandElectronicsEngineers,Inc.345East47thStreet,NewYork,NY10017-2394,USACopyright©1998bytheInstituteofElectricalandElectronicsEngineers,Inc.Allrightsreserved.Published1998.PrintedintheUnitedStatesofAmerica.ISBN0-7381-0179-6Nopartofthispublicationmaybereproducedinanyform,inanelectronicretrievalsystemorotherwise,withoutthepriorwrittenpermissionofthepublisher.IEEEStd1101.11-1998IEEEStandardforMechanicalRearPlug-inUnitsSpeciÞcationsforMicrocomputersUsingIEEE1101.1andIEEE1101.10EquipmentPracticeSponsorBusArchitectureStandardsCommitteeoftheIEEEComputerSocietyApproved21May1998IEEE-SAStandardsBoardAbstract:Additionaldimensionsthatwillensuremechanicalinterchangeabilityofsubracksandplug-inunitsbasedonIEEEP1101.1(D1.0,1997),IEEEStd1101.10-1996,andtheenvironmentalrequirementsofIEC61587-1(May1998-Draft)andIEC61587-3(May1998-Draft)arespecified.Keywords:backplane,compatibility,connector,inlineconfiguration,inspectiondimension,plug-inunit,printedboard,shroud,subrackIEEEStandardsdocumentsaredevelopedwithintheIEEESocietiesandtheStandardsCoordinat-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(ThisintroductionisnotpartofIEEEStd1101.11-1998,IEEEStandardforMechanicalRearPlug-inUnitsSpeciÞca-tionsforMicrocomputersUsingIEEE1101.1andIEEE1101.10EquipmentPractice.)DespitethepushformetriÞcation,theÒEuroboardÓ(19inbased)continuestobetheleadingchoicefortheindustrialmechanicalequipmentpractice,andisacceptedthroughouttheworldforallkindsofelectronicsapplications.Amongtheseareallmajorbus