MOTOYAMA EA91A User manual

INSTRUCTIONMANUAL
BulletinNo.MIE-B6104KBulletinNo.MIE-B6104K
ModelEA91A＆EA90A
PrintedinJapan
2013.07.05TKP
ModelsEA91AFlameproofTypeof
Explosion-protectedConstruction
ModelEA90AIntrinsicSafetyTypeof
Explosion-protectedConstruction
ELECTRO-PNEUMATIC
VALVEPOSITIONERS
ThisINSTRUCTIONMANUALissuppliedforinformationpurposeonlyandshould
notbeconsideredcertifiedmarketabilityandconformabilityofthisproduct.
□MOTOYAMAiscontinuouslyimprovingandupqradingitsproductdesign,specificationsand/or
dimensions,Informationincludedhereinissubjecttochangewithoutnotice.
■HeadOfficeandFactory
5-2,OhiraAzakameoka,Ohira-Mura,Kurokawa-gun,Miyagi-ken,981-3697Japan
TEL:+81-22-344-4511/FAX:+81-22-344-4533
■OverseasMarketing&SalesDept
5-2,OhiraAzakameoka,Ohira-Mura,Kurokawa-gun,Miyagi-ken,981-3697Japan
TEL:+81-22-344-4546/FAX:+81-22-208-5020

ModelEA91A＆EA90A
FOREWORD
29
ThankyouverymuchforpurchasingourModelEA91A/EA90AElectro-pneumatic
ValvePositioner.Takefullynoticethattheitemsdescribedbelowtousethisvalve
positionersafelyandcorrectly.
⑴ ThisInstructionManualdescribesthebasicrecommendedproceduresforopera
-tingtheModelEA91A/EA90AElectro-pneumaticValvePositioner.Thoroughlyread
andunderstandalldescriptionsinthismanualbeforeoperation.ThisInstruction
Manualshouldalwaysbereferredpriortoanyoperations.
⑵ Thisproductismountedtoacontrolvalveasdedicatedequipment.Readand
followallindividualproceduresinthisinstructionmanualwiththeinstructionmanual
ofcontrolvalvewhenworkingandoperatingthisproductmountedtothecontrol
valve.
⑶ As the result of studying and improving this product without notice, the
specifications,dimensions,adjustments,illustrations,andotheritemsincludedin
this manual might be different in details. For any questions about the delivered
product or this instruction manual, contact MOTOYAMA sales office or sales
agencyforpurchasebeforeoperation.
Tohandlethisproductsafely,thesymbolmarksandsignalwordsshownbelow
areusedinthisinstructionmanualtoalertriskasrequired.Thecontentsofsymbol
markandsignalwordaredescribedbelow.
Thismarkwiththissignalisusedwhenthepossibilityof
deathorseriousinjurytouserisassumedifhandlingthis
productincorrectly.
Thismarkandsignalareusedtocomplytheinstructions
topreventdamageofthisproductormalfunction.
Thismarkwiththissignalisusedwhenthepossibilityof
lightinjuryormiddleinjurytouser,orpropertydamage
isassumedifhandlingthisproductincorrectly.
1GeneralInformation
2
SafetyInformation
SymbolMark&
SignalWord Description
WARNING
CAUTION
IMPORTANT

1
ModelEA91A＆EA90A
CONTENTS
1.SAFETYINSTRUCTIONS
1.1GeneralSafetyInstructions
1.2
SafetyInstructionsonModelEA91AElectro
-pneumaticValvePositioner
1.3
SafetyInstructionsonModelEA90AElectro
-pneumaticValvePositioner
2.GENERALINFORMATION
2.1Purpose
2.2ApplicableRegulation
2.3Specifications
2.4ModelNumberingSystem
2.5NameplateIdentification
2.6SystemConfiguration
2.7Construction
3.PRINCIPLEOFOPERATION
4.INSTALLATION
4.1MajorDimensions
4.2InstallationConditions
4.3Pre-InstallationCheck
4.4
InstallationtoLinearMotionActuator
4.5 InstallationtoRotaryMotionActuator
4.6ConformityofCapacity
andCharacteristics
4.7InstallingDimensions
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5.EXTERNALCONNECTION
5.1PipingandWiringSystems
5.2PneumaticPiping
5.3ElectricalWiring
6.ADJUSTMENT
6.1Pre-adjustmentCheck
6.2AdjustingProcedure
6.3ZeroAdjustment
(LinearType,CamType:Common)
6.4ZeroAdjustmentforCam
6.5StrokeAdjustment
(LinearType,CamType:Common)
6.6SplitRangeAdjustment
6.7ReversePositionerAdjustment
(LinearType,CamType:Common)
6.8
ManualSwitchingMechanism-A/MSwitching
 (LinearType,CamType:Common)
7.MAINTENANCE
7.1PeriodicMaintenance
7.2MaintenanceProcedure
8.TROUBLESHOOTING
9.REFERENCEINFORMATION
9.1PredictedServiceLife
9.2DimensionofFitting
Page Page

CAUTION
CAUTION
CAUTION
CAUTION
WARNING
WARNING
WARNING
2
ModelEA91A＆EA90A
SAFETYINSTRUCTIONS
1
ⅡCT6
ⅡCT5
EA91A
EA90A
1.1.1
CompliancewithSafetyInstructions
Whenhandlingandoperatingtheelectro-pneumaticvalvepositioner,allthesafetyinstructionshereinshould
besecurelyfollowed.
1.1.2
ConformancewithSpecifications
BoththeModelEA91AElectro-pneumaticValvePositioner(flameproofexplosion-protectedconstruction)and
theModelEA90AElectro-pneumaticValvePositioner(intrinsicallysafeexplosion-protectedconstruction)
havebeenapprovedinaccordancewiththeLaborSafetyandHygieneLawof"TechnicalCriteriaofElectrical
-mechanicalEquipmentExplosion-protectedConstruction"(hereafterreferredtoas"TechnicalCriteria").
Thecertified seal,andthenameplateorthecautionarylabeldescribingthespecificationstoberequired
protectingexplosionareattachedtoeachvalvepositionerinconformancewithallspecifiedrequirements.
Checktheitemsdescribedinthecertifiedseal,andthenameplateorthecautionarylabel,andusethis
product.
1.1 GeneralSafetyInstructions
1.2.1 LimitationofInstallationLocations
TheEA91AValvePositionercanbeinstalledinthehazardousareaaccordingtotheavailableexplosivegas
ofthevalvepositioner.
However,donotinstalltheEA91AValvePositionerintheClass0hazardousarea.
1.2.2 MaintenanceduringOperation
DonotperformmaintenanceoftheEA91AvalvepositionerwhilethepowerisbeingturnedON.When
performing maintenanceby opening the terminal box with the valvepositioner turned ONdue to
circumstances,carefullymakesurebeforeandduringmaintenancethattheexplosivegasesareabsentusing
gasdetector.
Whenimpossibletocheckwhethertheexplosivegasesareabsentornot,maintenancemustbelimitedto
visualinspectionandadjustmentofmovablepartsnotrequiringtheopeningoftheterminalboxsuchas
zeroadjustmentandstrokeadjustment.Becarefulnottogenerateimpactsparksduringthismaintenance.
1.2.3Repairs
a)TurnOFFthepowerandmovetheEA91AValvePositionertosafetyplacebeforerepairing.
b)Bothmechanicalandelectricrepairsare.limitedtorestoringthevalvepositionertoitsoriginalcondition
inprinciple.
c)Theuseislimitedtotherepairabledegreeonlyusinggeneraltoolswithoutsolderingiron.
1.2.4 ProtectionagainstConventionalShort-circuitCurrent
ThecoilpartfilledwithresinoftheEA91AValvePositioneristhespecialexplosion-protectedconstruction
compliancewiththeTechnicalCriteria.ThisTechnicalCriteriarequiresthe"protectionagainst4000A
conventionalshort-circuitcurrentfortheelectricaldeviceorpartwithresin-filledconstructiontobe
connectedtotheexternalpowersupply".ForthehostdevicesuchascontrollertobeconnectedtotheEA91A
ValvePositioner,usefuseorbreakerwithbreakingcapacity4000Aormore.
"WARNING"sealisaffixedonterminalbox.
1.2SafetyInstructionsonModelEA91AElectro-pneumaticValvePositioner
Applicable
ExplosiveGases
InstallationLocation
Explosion-protectionType
ModelNo.
IntrinsicSafetyType
TechnicalCriteria,ExiaⅡCT6
FlameproofType
TechnicalCriteria,ExsdⅡCT6X
AllgasesclassifiedinGroupleftandDiv.1and2Hazard
-ous Area.Non-Hazardous Area. (Locations specifiedin
TechnicalCriteriaandDivision1and2HazardousArea)
AllgasesclassifiedinGroupleftandDiv.0,1and2Hazard
-ousArea.AllNon-HazardousArea.(Locationsspecifiedin
TechnicalCriteriaandDivision0,1,and2HazardousArea)
1.1.3 ProhibitionofChangingSpecificationsandModifications
Donotchangethespecificationsormodifythevalvepositionersbyuser.

ModelEA91A＆EA90A
3
WARNING
WARNING
WARNING
1.3.1 LimitationofInstallationLocation
Theelectricaldevicewiththeintrinsicallysafeexplosion-protectedconstructionconsistsofthecombination
oftheintrinsicsafetydevice(EA90AElectro-pneumaticValvePositioner)tobeinstalledinhazardousarea
andthesafetybarrier(intrinsicsafetyrelateddevice)tobeinstalledinnon-hazardousarea.
TheEA90AValvePositionercanbeinstalledinhazardousareaaccordingtotheavailableexplosivegasof
theintrinsic safetydevice.However, donotinstallthesafetybarriertobeelectricallyconnected tothe
EA90A Valve Positioner inhazardous areaunless the safetybarrier isused incombinationwith other
explosion-protectedconstruction(flameproofexplosion-protectedconstruction,etc.)
1.3.2
CombinationwithSafetyBarrier
ThesafetybarrierthatdoesnotindividuallypassthemodeltestincompliancewiththeTechnicalCriteria
shouldnotbeusedbyconnectingtothiselectric-pneumaticvalvepositionerEA90A.
Theexplosion-protecteddevicetypeofthesafetybarriershallbe"ⅡC "andtheclassificationshallbe"ia".
Besuretocomplywiththeconditionssincetherearelimitationsofinductanceandcapacitanceforsafety
rateandexternalwiring.(RefertoItem2.6.2"ModelEA90AElectro-pneumaticValvePositioner(IntrinsicSafety
Type)"inthismanualformaintenanceoftheEA90AElectro-pneumaticValvePositioner.)
1.3.3Maintenance
ConsultwithMotoyamaformaintenanceoftheEA90AElectro-pneumaticValvePositionerinprinciple.
Ifperformingmaintenancebyuser,readthefollowinginstructionshereinandcarefullyfollowtheinstructions
describedinChapter8"MAINTENANCE"forspecificprocedures.
(1)
MaintenanceofEA90AValvePositioner
WhenperformingmaintenancetheEA90AValvePositionerinstalledinhazardousarea,carefullymakesure
beforeandduringmaintenancewhethertheexplosivegasesareabsentornotbyusinggasdetector.
(2)MaintenanceduringOperation
DonotperformmaintenanceoftheEA90AValvePositionerwhilethepowerisbeingturnedON.
WhenperformingmaintenancewiththevalvepositionerturnedONduetocircumstances,maintenancemust
belimitedtovisualinspectionandadjustmentofmovablepartssuchaszeroadjustmentandstroke
adjustment.
(3)Repairs
a)TurnOFFthepower,disconnecttheexternalwiring,andthenmovetheEA90AValvePositionertonon
-hazardousarea.
b)Bothmechanicalandelectricrepairsarerestrictedtoonlyrestoringthevalvepositionertoits
originalconditioninprinciple.
c)Therepairbyusershallbelimitedtorepairusinggeneraltoolswithoutsolderingiron.
(4)VerificationofIntrinsicSafety

Checkthefollowingitemsinnon-hazardousareawhenconfirmingintrinsicsafetyoftheEA90AValve
PositioneratperiodicmaintenanceoftheEA90AValvePositionerandatreplacementofthepartsfor
repairs.
Checktheinsulationperformancebyapplyingvoltagewith500Vforoneminutetotheplus(+)
terminalortheminus(‒)terminal,andthegroundingterminaloftheterminalblock.
1.3SafetyInstructionsonModelEA90AElectro-pneumaticValvePositioner
TheEA90AElectro-pneumaticValvePositioner(intrinsicallysafeexplosion-protectedconstruction)consistsof
oneintrinsicsafetydevice(electro-pneumaticvalvepositioner)designedandproducedfollowingtothenew
TechnicalCriteriaandoneintrinsicsafetyrelateddevice(safetybarrier).
Use the safetybarrierindividuallypassed the devicetest forcombining withtheEA90AElectro-pneumatic
ValvePositioner.SelectthesafetybarrierthatcomplieswiththecombinationconditionsdescribedinItem2.6.2
"ModelEA90AElectro-pneumaticValvePositioner(IntrinsicSafetyType)inthismanual.
CAUTION
CAUTION
CAUTION

4
ModelEA91A＆EA90A
GENERALINFORMATION2
≦±0.3％F.S
≦6.0ℓ/minNor(Sup.140kPaG(1.4kgf/cm2G),Signal50％)
7.0ℓ/minNor(Sup.140kPaG(1.4kgf/cm2G),Signal50％)
≧100MΩ(with500VDCMegabetweenterminalandcase)
Polyurethaneresinpaint,Munsell2.5PB5/8Blue
Approx.2.9kg
【Note】(1)※Availableasoptionsoncustomer'srequest.
(2)ModelEA90A/EA90ACpositionerisnotavailableforreverseactiontypepilot.
4〜20mADC
250Ω
Max. 500kPaG(5.0kgf/cm2G)
IECIP65（※IECIP66）
Rc1/4（PT1/4）
G1/2
Linear
10〜65mm
(※over65‒135mm)
≦±1.0%F.S
≦ 1.0%F.S
≦ 0.1%F.S
10〜65mm
(※over65‒135mm)
≦±1.0%F.S
≦ 1.0%F.S
≦ 0.1%F.S
≦±2.0%F.S
≦ 1.5%F.S
≦ 0.3%F.S
−40〜100℃（−20〜60℃forexplosionprotection） −20〜60℃
60°Eq%
90°Linear
60°（Linear） ※
≦±1.0%F.S
≦ 1.5%F.S
≦ 0.3%F.S
60°Eq%
90°Linear
60°（Linear） ※
2.1Purpose
TheModelEA91AandEA90AElectro-pneumaticValvePositionersaremountedtocontrolvalves.Theyconvert
electricsignalsfromthecontrollerintopneumaticpressuretocontroltheopeningofthecontrolvalveproperly.
Thevalvepositionersareofexplosion-protectedconstruction,andareimprovedthepositioningaccuracy
andresponseperformanceofprocesscontrolvalvesinstalledinhazardousareas.
2.2ApplicableRegulation
2.3StandardSpecifications
Thevalvepositionersdeliveredarepassedthetestinaccordancewithtechnicalcriteriaofexplosion-
protectedconstructionstandardforelectricalmachineandequipment(issuedbytheMinistryofLaborin
Japan,No.556,1996).
Painting
Mass
Type
InputCurrent
InputResistance
SupplyAirPressure
Structure
Connection
Characteristics
Explosion-protection
ProtectionClass
AirPipingConnection
ConduitConnection
OutputCharacteristics
StandardStroke
Linearity
HysteresisError
Deadband
(substancealone)
Repeatability
AirConsumption
Maximum
SupplyandExhaustofair
InsulationResistance
AmbientTemperature
ModelEA91A
LeverType
(SingleAction)
ModelEA91AC
CamType
(SingleAction)
ModelEA90A
LeverType
(SingleAction)
Model90AC
CamType
(SingleAction)
Flame-prooftype
(JIS)ExsdⅡCT6X
(NEPSl)ExdmⅡCCT6
(KOSHA)ExdmbⅡCT6
CertifdNo.12-AV4BO-0114
Intrinsicsafetytype
(JIS)ExiaⅡCT5
(NEPSl)ExiaⅡCT5

ModelEA91A＆EA90A
5
2.4ModelNumberingSystem
2.5NameplateIdentification
2.6SystemConfiguration
【Note】Ifmethodofleadingexternalcableisexplosion-proofconnector(Spec.code:T),applicablestandardisJIS,flame-proof.
 IncaseofNEPSIflame-prooftype,flame-proofpackingconnector(cableglands),certifiedbyNEPSI,shallbesuppliedby
customer.
FlameproofType
IntrinsicsafetyType
LeverType
CamType
ConduitType(standard)
Explosion-proofconectorwithpackingType(option)
(1)Thesafetycertifiedsealnameplate(OfficialCertificationPlate)isattachedonthetopofpositionercase.
(2)Theexplosionprotection"WARNING"nameplateisattachedontheupperpartofterminalbox.
(EA91AandEA90Ahavedifferentcontentseachother.)
(3)Thespecificationnameplateisattachedontherightsideofpositionercase.
(4)Theorificeplateclassificationnameplateisattachedonthepilotcover.
2.6.1ModelEA91AElectro-PneumaticPositioner(FlameproofType)
HazardousArea
GeneralEquipment
Electro-pneumaticPositioner
ModelEA91A
PowerSource
4〜20mADC
Non-hazardousArea
EA91A
EA90A
（Blank）
Ｃ
（Blank）
Ｔ
Structure
Displacement
transferMethod
MethodofLeading
ExternalCable
Specifications BasicModelNo. SpecificationCode
Flameproof（EA91A,EA91AC）
労(平25.5)検 ※
本山製作所
IntrinsicSafety（EA90A,EA90AC）
本山製作所
株式
会社
株式
会社 ※Described date may be differed by
time of manufacture.
第TC17951号
労(平25.4)検 ※
第TC17899号

6
ModelEA91A＆EA90A
2.7Construction
2.7.1LeverType 2.7.2Built-inCamType
Cam
Restriction
OutputAirConnection
OutputPressureGauge
Auto/ManualSwitchingScrew
ZeroAdjustmentKnob
TerminalBox
ConduitConnection Nozzle Flapper
Body
Stroke
AdjustmentKnob
SupplyPressureGauge
SupplyAirConnection
Pilot
(Valve)
Right-handlateralface
4〜20mADC
Safetyearth
Earthbusbar
Source
Thesafetybarrierwhichisusedincombinationwithelectro-pneumaticpositionerEA90Amustbe
※2TIIScertifiedtype.
Forthesafetybarrierselection,pleaserefertothefollowingdataforIntrinsicallysafeapprovalof
modelEA90A.
①PerformanceclassificationandGroup
iaIIC
②Permissiblemaximumvalues
Ui=30V, Ii=100mA, Pi=0.75W
③Parameters
Ci=negligiblysmall
 Li=negligiblysmall
Tocombinewithasafetybarrier
2.6.2ModelEA90AElectro-PneumaticPositioner(IntrinsicSafetyType)
Hazardousarea Nonhazardousarea
Caution
※2TIIS;TechnologyInstitutionofIndustrialSafety(JAPAN)
※Motoyamadistributerecommendedsafetybarriers(MTLmade,787S+728+type).Ifyouareinterestedorhaveany
questionsabouttheproduct,pleasecontactoursalesofficesorsalesagents.
Electro-pneumaticpositioner
EA90A
Safetybarrier Generaldevice

7
ModelEA91A＆EA90A
PRINCIPLE0FOPERATION3
Auto/Manual
SwitchingScrew
Nozzle
BackPressure
PilotValve
FigureofPrincipleofOperation
InnerValve
Filter
Restriction
OrificePlate
SupplyPress.
ZeroAdjustmentKnob
ZeroAdjustmentSpring
ConduitConnection
Balancer
Armature
TorqueMotor TransmissionLever
TorqueMotorCoil
Nozzle
Output
Exhaust
Flapper
StrokeAdjustmentKnob
Actuator
ValveStem
StrokeAdjustmentLever
Transmission
FeedbackLever
The Model EA91A and EA90AElectro-Pneumatic Positioner isused asaccessorymeasuringinstrument to
pneumaticcontrolvalves.Thisconvertselectricsignalsfromthecontrollerintopneumaticpressuretoposition
theopeningofpneumaticcontrolvalve.
Asthesignalcurrentfromthecontrollerormanualoperatorincreases,thetorquemotorcoilgeneratesmagnetic
poleonthearmature.Thearmaturereceivesrotarytorqueinthecounter-clockwisedirection,andvariesthe
distancebetweenthenozzleandtheflapper.Asaresult,thenozzlebackpressurechanges,andthepilot
valvereactsaccordingly.
Theoutputairofpilotvalveissuppliedtothediaphragmmotor,andmovesthecontrolvalve.Thevalvestem
movementis mechanicallytransmittedto the feedbackspring throughfeedbacklever,transmissionlever,and
strokeadjustmentlever,andbalancesthevalvemovementatapositionthatisequaltothegeneratedtorquedue
tothesignalcurrent.
FeedbackSpring

8
ModelEA91A＆EA90A
INSTALLATION4
4.1Dimensions Unit :mm
LeverType
AirConnection
2-Rc1/4
ConduitConnection
G1/2
129
45.5 137
146 (AType)
206 (BType)
218
58.5
164.5
51 7
45.5 137
218
KXB-LO-16F
(SpecialOption)
KXB-LO-16
(Standard)
3
51
51
135
12.5
153.5
31
7
（LeftLateralView）
Built-inCamType
（Seeaboveasleftlateralview）
LeadingExternalCable
◇ConduitType
Model : EA91A(C),EA90A(C)
◇ FlameproofPackingType(AdditionalOption):ApplicablecableOD:φ9.1〜φ11
Model : EA91A(C)T
ActuatorSize(OuterDia.)
φ200〜φ330
φ400〜φ650
Type
Ａ
Ｂ