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1、MIL”STD-2120 27Auqlst1984 MILITARY STANDARD CONNECTORS,ELECTROMAGNETIC INTERFERENCE(EMI) FILTER CONTACT NODELIVEFWBLEDATA REQUIREDBYT HISDOCUMENT FSC 5935 M“IL.STD-2120 27August 1984 DEPARTMENTOFDEFENSE Washington,DC20363 Connectors,Electromagnetic Interference(EMI)FilterContact MIL-STD-2120 1.ThisM
2、ilitaryStandardisapprovedforusebyallDepartmentsandAgencies oftheDepartmentofDefense. ?Beneficialcomments(recommendations,additions,deletions)andany pertin;tdatawhichmaybeofuseinimprovingthins documentshouldbeaddressed :Commander,NavalElectronicSystemsCommand,ATTN: ELEX8111,Departmentofthe vy,Washlnt
3、on,DC20363byusfn % 7 self-addressedStandardizationDocument Improvementreposal(DDForm1426appearingattheendofthisdocumentorby letter. MIL-STD-2120 27August1984 FOREWORD 1.Thisstandardestablishesthe requirementsfor an electromagnetic interference(EMI) filtercontactconnector (hereinafter referredto as F
4、CC). Oncedetermined,the requirementsshouldbe incorporatedinto a specification sheetunderthe generalconnectorspecificationcoveringits matingconnector. 2.An EMI FCCshallbe a connectorcontainingsome filterand ground contactsterminatedwithacrimpremovablesocketcontactper MIL-C-39029, a .025 inchsquaresol
5、derlesswrappostper MIL-sTD-1130,or a solder termination. Specificcontactsshall be specifiedon theindividualspecificationsheets. 3.Ihlessotherwisespecifiedon theindividualspecificationsheet, the groundcontactshall be terminatedto a non-removableground plane withinthe FCC bodywhichis connectedto the F
6、CCshell. iii M!L-STD-2120 27August 1984 CONTENTS Paragraph1. 1.1 2. :; 3. :; 4. 4.1 4.2 4.3 4.4 :; 4.7 4.8 4.9 4.10 4.11 4.12 4.13 4.14 4.15 4.16 5. %:1 5.1.2 5.1.2.1 %1 5.2.2 5.2.3. 5.2.4 5.2.5 5.2.6. 5.2.6.1 5.2.6.2 5.2.6.3 SCOPE- - - - Scope- - -.- - REFERENCEDDOCUMENTS- -Specifications,Standards
7、andHandbooks- - Orderofprecedence- - - DEFINITIONS- Filtercontactconnector(FCC)-.-. - - Groundcontact- - - - - GENERALREQUIREMENTS- Specificationsheets- - - - - Filtercontact- - Groundcontact- - - - - Temperaturerange- - - Intermateability- - - Mounting- - Contactlocation- - - Matingconnector- - - E
8、nvironmentalrequirements- - Connectorfinish- - FCCfrequencyrangeband- - Dissipationfactor- Voltagerating- - - - Radiofrequency(RF)currentrating- - - Marking- Preparationfordelivery- - - DETAILREQUIREMENTS- - Qualityassuranceprovisions- - - Qualificationandretentionofqualification- Qualityconformance
9、inspection- Modifications- - - Methodsofexaminationandtesting- Dielectricwithstandingvoltage- - Insulationresistance- - Thermalshock- - Altitude-1owtemperature- - Contactretention- - Attenuation- - Attenuationatambienttemperature- Attenuationwithfeed-throughcontactcurrent Attenuationattemperatureext
10、remes- - - - - - - - - - - -.- .- - - - 5.2.6.3.1Hightemperature- - - - 5.2.6.3.2Lowtemperature- - 5.2.7RFcurrent- - 5.2.7.1RFcurrenttest(qualificationonly)- - - 5.2.7.2ProcedureforperformingRFcurrenttest- - - 5.2.8Voltagetransient- - 5.2.8.1Voltagetransienttest- - - - 5.2.9Contactresistance- - - 5.
11、2.9.1Filtercontacts- 5.2.9.1.1Filtercontacttest- 5.2.9.2Groundcontacts- - - - 5.2.9.2.1Groundcontacttest- - 5.2.10Resistancetopinbending- 5.2.10.1Resistancetopinbendingtest(pincontactsonly)- - 5.2.11Filterlife- 5.2.11.1Filterlifetest- - - 5.2.12Filtercontactcapacitance- - - - 5.2.12.1Filtercontactca
12、pacitancetest- - - 5.2.13Vibrationandshock- - - 6.NOTES- - iv Page - 1 1 3 3 3 13 13 13 13 14 MIL-STO-2120 27 August 1984 CONTENTS - Continued FIGURES FIGURE1Attenuationwithfeed-throughcurrent- 2Attenuationmeasurementsystem- RFcurrenttestprocedure- :Voltagetransient- TABLEIElectricalcharacteristics-
13、 - - TABLE - V/vi - - - - - Page -8 - 9 -11 - 12 -4 MIL-STD-2120 27August 1984 1,SCOPE 1.1scope.Thisstandardestablishestherequirementsforanelectromagnetic interference(EMI)filtercontactconnector(hereinafterreferred,toasFCC). Once determined,therequirementsshouldbeincorporatedintoaspecificationsheetu
14、nder thegeneralconnectorspecificationcoveringitsmatingconnector. 1 MIL-STD-2120 27August 1984 2.REFERENCEDDOCUMENTS 2,1 follow ofthe inthe SPEC Specifications,standards,andhandbooks.Unlessotherwisespecified,the ngspecifi cations,standards,anddbooksoftheissuelistedinthatissue DepartmentofDefenseIndex
15、ofSpecicationsandStandards(DoDISS)specified solicitationformapartofthisspecificationtotheextentspecifiedherein._ FICATIONS MILITARY MIL-M-39029 STANDARDS MILITARY MIL-STD-202 MIL-STD-220 MIL-STD-704 MIL-STD-1130 MIL-STD-1344 -Contact,ElectricalConnector,General SpecificationFor - TestYethodsforElect
16、ronicandElectrical ComponentParts - MethodofInsertionLossMeasurement - AircraftElectricPowerCharacteristics - Connection,ElectricalSolderlessWrappost - TestMethodsforElectricalConnectors (COpiesofspecifications,standards,handbks, andpublicationsrequiredby manufacturersinconnectionwithspecificacquisi
17、tionfunctionsshouldbeobtained fromthecontractingactivityorasdirectedbythecontractingofficer.) 2.2Orderof precedence.Intheeventofconflictbetweenthetextofthis standardand her%f erencescitedherein,thetextofthisstandardshalltake precedence. - 11 MIL-STD”2120 27August1984 3.DEFINITIONS 3.1Ffltercontactco
18、nnector(FCC).Anelectromagneticinterference(EMI)filter contactconnectorisaconnectorcontainingsomefilterandgroundcontacts terminatedwitha crimpremovablesocketcontactper$IIL-C-39029,a.025inch (0.64mm)squaresolderlesswrappostperMIL-STO-1130,oraSoldertermination. Specificcontactsshallbespecifiedontheindi
19、vidualFCCspecificationsheets. 3.2Groundcontact.Unlessotherwisespecifiedintheindividualspecification sheet,thegroundcontactshallbeterminatedtoanonremovablegroundplanewithin theFCCbodywhichisconnectedtotheFCCshell. I1 MIL-STD-2120 27August 1984 4.GENERAL REQUIREMENTS. 4.1Specification sheets.The indiv
20、idual item requirements shall be as specified herein, in the general connector specif” lcation, and in accordance with the applicable specification sheets. 4.2Filter contact.A FCC shall contain filter contacts of no more than three frequency bands (see + table 11 In any one nsert arrangement.One fre
21、quency range band is preferred. 4.3Ground contact.The ground contact shall be terminated to a nonremovable ground plane within the FCC thak is permanently connected to the connector shell. 4.4Temperature range.The FCC shall have an operating temperature range of -55C to +125C and a nonoperating temp
22、erature range of -65C to +125C. 4.5Intermateability.The FCC shall mate with the applicable connector and shall conform to the intermateability dimension specified in the general connector specification. 4.6Mountinq.Mounting dimensions shall be specified in the FCC specification sheet. 4.7Contact loc
23、ation.The size and location of each filter and ground contact shall be specified in the FCC speciffcation sheet. 4.8Mating connector.The FCC specification sheets shall specify the matfng connector by part number. 4.9Environmental requirements.Unless otherwise specified in the FCC specification sheet
24、, the FCC shall meet the environmental requirements of the general connector specification. 4.10Connector ffnfsh.The FCC shall have the same conductive finfsh and meet the same conductive finish requirements of ts mating connector. 4.11FCC fvequency range band.The FCC specification sheets shall spec
25、ffy one and not more than three frequency bands specified fn table I for its filter contacts. TABLE I.Electrical characteristics. 1I1I(dBJ I Freq.I Minimum attenuation FilterlCapacitance ICut-offI=C ambient temperatureI -55C to +125C i Iband network (pF)lFreq (MHz)I(noload)11 Itype I(3 dB max)lTest
26、frequencies (MHz)Test fre uencies (MHz)I II! MnI MaxI1113lm-r301100 mI0011 13 110 lJIJI 1A 1s cI300 l-r1 IBIPII300 Iboo0III I 4 I 10 132i 45 IuPI50010 I4Zz3650III I uI 20 I 35 I 45I ID 19J IDistr.IIIIIIII IIElement11,50013,000 I5111711212014516011171111141331421 IE IF Bs IDistrcI1IIIIIIIIIIIIIiIr I!
27、Element14,000110,00012 Iti I16 114 124 I 55 !100 I1OOII 61 8 I 151 35 I 80 I1OOI I11Ill11IIIllIIIIi II MIL-STD-2120 27August 1984 4.12Dissipationfactor. Thedissipationfactoroffiltercontactsshallbe4 percent. 4.13Voltageratin.TheworkingvoltageratingoftheFCCshallbe115Vrms, 60Hz,and200 vdc . 4.14Raciiof
28、requency(RF)currentratinq.UnlessotherwisespecifiedontheFCC specificationsheets, theR1- currentratingoffiltercontactsshallbe0.25ampere. 4.15Markinq.Theoutsidesurfaceoftheconnectorshellshallbemarkedwiththe words“FilterContacts”inatleasttwoplaces,shallbeofa contrastingcolorto thebasicshell,andshallbere
29、adilyvisiblewhenservicingthemountedFCC(see applicablespecificationsheet). 4.16Preparationfordelivery.Preparationfordeliveryshallbeinaccordance withthegeneralconnectorspecification. MIL-STD-2120 27August1984 5.DETAILREQUIREMENTS 5.1Qualityassuranceprovisions.Thequalftyassuranceprovisionsfora FCC shal
30、lbeInaccordancewiththerequirementsofthegeneralconnectorspecification exceptasmodifiedorexpandedherein. 5.1.1Qualificationandretentionofqualification.Qualificationandretention ofqualificationtestsshallincludethoserequired bythegeneralconnector specificationandthefollowingadditionaltests: a.Initialatt
31、enuationatambienttemperature(sweptfrequency)(5.2.6.1). b.Attenuationwithfeed-throughcontactcurrent(5.2.6.2). c.Attenuationattemperatureextremes(5.2.6.3). d.Capacitance,insulationresistanceanddielectricwithstandingvoltage aftertemperaturecyclfng. e.Capacitance,insulationresistanceanddielectricwithsta
32、ndingvoltage aftershock. f.Capacitance,insulationresistanceanddielectricwithstandingvoltage afterhumfdity. 9* RFcurrent(5.2.7). h.Voltagespike(see5.2.8). i.Resistancetopinbending(5.2.10). j. Filterlife(5.2.11). k.Finalattenuationatambienttemperature(sweptfrequency)(5.2.6.1). 5.1.2Qualityconformancei
33、nspection.Jalityconformanceinspectionshall includegroupinspectionofthegeneralconnectorspecificationwfththe modificationsspecifiedin5.1.2.1. 5.1.2.1$iodifications.GroupAinspectionshallinclude100percenttestfngof allffltercontactsintheFCCasfollows,exceptasspecifiedindbelow. a.Capacitanceatambienttemper
34、ature(at100MHz). b.Insulationresistance. / c.Dielectricwithstandingvoltage./ d.Attenuationmeasurementsshallbeperformedon10percentoffilter contactsofeachfrequencybandofcontacts. 5.2Methodsofexaminationandtesting. Testmethodsshallbeinaccordancewith thegeneralconnectorspecificationexceptasmodifiedherei
35、n. 5.2.1Dielectricwithstandingvoltage. Thedielectricwithstandingvoltage,when testedinaccordancewiththegeneralconnectorspecfficatfon,shallbe500Vdc. Thedielectricwithstandingvoltagetestshouldbeusedwithcautionparticularlyin inplantqualityconformancetesting, asevenanoverpotentiallessthanthebreakdown vol
36、tagemayfnjuretheinsulationandtherebyreduceitssafetyfactor. Therefore, repeatedapplicationofthetestvoltageonthesamespecimenisnotrecommended.In caseswhensubsequentapplicationofthetestvoltageisspecifiedinthetest routine,ftisrecommendedthatsucceedingtestsbemadeatreducedpotential. 5.2.2Insulationresistan
37、ce.Insulationresistancebetweenanypairofcontacts andbetweenanycontactandshell,whentestedasspecifiedinthegeneralconnector specification,shallbe5$000megohmsminimum. 1/Maybetestedsimultaneously. !41L-STD-2120 27August 1984 5.2.3Thermalshock.Therequirementsofthegeneralconn$ctorspecfication shallapplyexce
38、ptthatthetemperatureextremesshallbe-65Cand125C. 5.2,4Altitude-lowtemperature(whereapp licable).Thelowtemperaturealtitude requirementsofthegeneralconnectorspecif ication shallapplyexceptthevoltage shallbeasspecifiedintheFCCspecificationsheet. 5.2.5Contactretention.Contactretentionshallbeperformedonal
39、lcontact typesasspecitiedInmethOd2007OfMIL-sTD-1344.Detailsandretentionvalues shallbespecffiedontheindividualspecificationsheets.Contactterminations utilizfngMIL-C-39029socketcontactsshallbecapableofbeinginstalledandremoved usingthetoolsspecifiedforthosecontacts. 5.2.6Attenuation.Whentestedasspecifi
40、edfn5.2.6.1atambienttemperature, 5.2.6.2withfee d-throughcontactcurrent, and5.2.6.3attemperatureextremes,the attenuationoffiltercontactsinconnectorsshallbenotlessthanthevaluesshown intableI oronfigure1. 5.2.61Attenuationatambienttemperature. FCCSshallbemeasuredfor attenuationusinga measurementsystem
41、shownonfigure2oracceptablesubstitutes approvedbythequalifyingactivity. Theattenuationofthesampleshallbecompared tothatofacalibratedattenuatorina50-ohmsystem. Unlessotherwisespecified, allfiltercontactsintheFCCshallbetested. Forqualificationtesting,initial andfinalattenuationshallbemeasuredonasweptfr
42、equencybasisacrossthe frequencyband(A,B,andsoforth).Forintermediatetestmeasurementsduring qualification,discretemeasurementsshallbemadeat10MHzorthelowesttest frequencyindicatedintableI and100MHz. Foracceptancetesting,discrete measurementsshallbemadeat100FIHz. Followingaretherequirementsforthe equipm
43、entusedinthecircuit: a.Sfgnalgenerator:Thesignalgeneratorwithanoutputimpedanceof50ohms shallbecapableofanadequate,stableoutputtoensureauseful indicationofthedetectorwithin5 percentoftheapplicablefrequencyat theapplicableattenuationlevel. b.Isolationpads:Theisolationpadsshallbe50-ohmcoaxialattenuator
44、sof 6to10decibels(dB)nominalattenuationwfthavoltagestandingwave ratio(VSWR)of1.3orlessattheapplicablefrequency. c*Calibratedattenuator:Thecalibratedattenuatorshallbea precision 50-ohmcoaxialattenuator,eitherfixedorvariable,withanaccuracyof *0.1dB/10dBattheapplicableattenuationlevelandfrequency. d.Te
45、stfixture:Thetestfixtureshallprovidegoodelectricalcontact betweenthesystemgroundandthefilterbodyandprovideadequate shielding.Thefixturemayincludea50-ohmresistorinserieswiththe filtercontact,providedattenuationlevelrequirementsareincreasedby6 d9.Thefixtureshallhavelessthan1.5VSWRat100MHzwitha50ohm lo
46、adwithoutafilterinserted. e.Switches:Theswitchesshallbe50-ohmcoaxial,eithermanuallyor electricallyoperated,withaVS!4R of1.5orlessattheapplicable frequency. f.Fixturedesignistoaccompanythequalificationreportwithsufficient informationtoallowevaluationoftestresults. 5.2.6.2Attenuationwithfeed-throughcontactcurrent. FCCSshallbetestedas specffiedin5.2.5.1exceptthatthefiltercontactundertestshallcarrydccurren