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
………………2
…………2
…………2
…………3
………………4
……………………………………4
…………………4
……………………………4
……………5
………………5
…………………5
………………………………6
……………7
……………………………8
………………………8
…………………9
…………………9
……10
…11
……………………12
…………………14
……………15
…………15
………………………16
………………………16
……………………………19
………………19
…………………20
…20
……………20
…20
………………20
…22
…22
…………………………23
…………………23
………………24
…………………25
…………26
………………26
……………………27
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

9
ModelEA91A＆EA90A
※Ifthedeviceisinconditionsof①or②,contactoursalesbranchorsalesagent.
※RefertoItem9.2"DimensionofMountingHardware"for
dimensionofeachpart.
※Theambienttemperatureinthenon-explosion-
protectedenvironmentis‒40to100℃
−20〜60℃ −20〜60℃
80〜110kPa,AbsolutePress.
Environmental
Conditions
Model
AmbientTemp.
Atmospheric
Pressure
(5)OrificePlateCheck
Removepilotcover,andcheckorificeplateappropriate
foractuatorcapacityisinstalledandset.
ConnectorArm
StemClamp
ForModel2900 ForModel3300
ForModel3800
ForModel2800
Bracket
FeedbackLever
4.2InstallationConditions
4.2.1LocationsforInstallation
ThemodelsEA91AandEA90Aelectro-pneumatic
positionercanbeinstalledandusedatthehazardous
areainaccordancewithgasestobeused.
4.3Pre-InstallationCheck
(1) Nameplate Check (related to specifications and
explosion-protectedtype)
Checkthecontentofthenameplateattachedtothemain
bodyofthepositionerwhethertheorderedspecification
isconformedwith.
(2)AppearanceCheck
Checkthepresenceofdamageonthedevicedueto
transport.
(3)AccessoryIdentification
 LeverType:Bracket,StemClamp(ConnectorArm
included),FeedbackLever,andConnectr
Pin
Buit-inCamType:Bracket,ConnectingShaft,Set
Screw,SpacerBolt,andSetSpring
Also,therelativebolts,nuts,vises,andwashers,etc.are
attached.
(4)PressureGaugeCheck
①Iftheequipmentmaycausetobeexposedtotheradiationfromplantfacilitiesandthe
ambienttemperaturemaybeabnormallyhigh,takeappropriatemeasurestoinsulatethe
heat.
②Ifinstallingtheequipmentunderthespecialconditions(vibration,corrosiveatmosphere,
alwaysbeexposedtodrain),takeappropriatemeasurestoprotectfromsuchconditons.
4.2.2EnvironmentalConditions
Theapplicableenvironmentalconditionsareshownin
therighttable.
CAUTION
IMPORTANT
IMPORTANT
ModelEA91A
FlameproofType
ModelEA90A
IntrinsicSafetyType
Besurenottoprovideoverpressurebecause
the pressure gauge appropriate for supply
airpressureisinstalled.
Althoughorifice plate thatconforms tothe
order specifications isinstalledat factory
shipment,checkitagain.(RefertoItem4.6.1)

10
ModelEA91A＆EA90A
PositionofStrokeAdjustmentLever
InstallationDrawingof
ActuatorforModel3800
DirectAction（DA） ReverseAction（RA）
Tobesquare
FixingBolt
DiaphragmStem
5〜10mm
Actuator
Bracket
4.4InstallationtoLinearMotionActuator
Use bracket suitable for actuator, and install the
Positioner properly. When installing, use mounting
threadedholeonthebackofthePositionerandmount-
ingthreadedholeinthefrontoftheactuator.
⑴ Attachthestemclamptodiaphragmstem.
⑵ Attachthebrackettoactuator.
⑶ InstallthePositionertobracket.
⑷ ChangeA/MSwitchtoM(Manual)andturnhandle
ofairfilterregulatortosupplyairpressuretoactuator
forlettingthevalvestrokecomeupto50％position.
⑸ Fix the connector pin to feedback lever and
connectorarm.
IMPORTANT
IMPORTANT
Atthispoint,attachthestemclampupward
approx. 5 to 10 mm from lock nut.Fix the
connectorarmsoastobeparalleltothefront
surfaceofactuator.
Fixtheconnectorpinsothatfeedbackthe
leverandconnectorarmarepositionedin
horizontalandparallel(squaretopositioner)
atmidpoint(50％)ofthestroke.
Assembletheconnectorpinbetweenfeed-
backleverandsetspring.
Checkthatthestrokeadjustmentleverinthe
Positionerissquare.
⑹ Installairpiping.(RefertoItem5.2)
※Model3800,Model2800,andotherlinearmotionactuator
maybeappliedthesameproceduresasmentionedabove.
①
②
③
Installationof
FeedbackLeverforFrontSide
ReverseAction(RA)
Installationof
FeedbackLeverforBackSide
DirectAction(DA)
FeedbackLever
FeedbackLever
ConnectorPin
ConnectorPin
StemClamp
ConnectorArm
SetSpring
SetSpring

11
ModelEA91A＆EA90A
DiaphragmActuator
CrankBox
Elector-pneumatic
Positioner
Shaft
Shaft
Bracket
SpacerBolt
SetScrew
ConnectingPipe
Indicator
SpringWasher
LockNut
Connecting
pipe
HolePosition（Vertical）
ConnectingShaft
SetSpring
SetScrew
（Horizontal）
Connecting
Shaft
FeedbackShaft
4.5InstallationtoRotaryMotionActuator
⑴ Attachthespacerbolt.
Tightenthespacerbolttocrankbox.(Screwshortsideofspacerboltthreadedpart.)
⑵ Mounttheconnectingshaft.
Insertthelocknut,springwasher,andindicatortoconnectingshaft,andscrewtheconnectingshafttoM8
screwofvalveshaft.
⑶ Fixtheindicator.
Checkthatvalveactionisairfailure-openorair-failureclose.Then,fixtheindicatortoappropriateposition,
openorclose,onindicatorscalewithlocknut.
※Theholepositionofsetspringmustbeverticaltoconnectingshaft.
⑷ Attachthebracket.
Attachthebrackettothepreinstalledspacerbolt.
⑸ Attachtheconnectingpipe.
Attachtheconnectingpipetotheserratedportionofthefeedbackshaftatbacksideofthepositionerwith
setscrew.
※Thepositionofthesetscrewmustbehorizontal.
⑹ Mountthepositioner.
Inserttheconnectingshafttotheconnectingpipeandmountthepositionertospacerbolt.
⑺ Attachsetspring.
Attachthesetspringtotheconnectingpipeandconnectingshaft.
IMPORTANT
Set the inserting hole on connecting shaft vertically and the set screw on connecting rod
horizontallytoproperposition.
IMPORTANT
Check the positioner and connecting shaft the connecting pipe and the feedback shaft are
fixedinalignment,whenthebracketistighten.
IMPORTANT
Thesetspringistheimportantparttoabsorbplaybetweenconnectingshaftandsetscrew.
Besuretoattachthesetspringsothatthefunctionisservedfully.
⑻ Installairpiping.(RefertoItem5.2)
PositionerInstallationDrawing
toActuatorModel2900

12
ModelEA91A＆EA90A
OrificePlate
forStandardSize
VGroove1 VGroovewithBlack-coating
PilotCover
PilotCover
FixingScrew
forCover
Manifold
Gasket(B)
Gasket(B)
Gasket(A)
Gasket(A)
CutforIdentification
OrificePlate
OrificePlate
PilotAss'y
PilotAss'y
V
Groove
2
V
Groove
3
VGrooves
VGrooves
OrificePlatefor
SmallSizeActuatorNo
1
2
Positioner
Types
No.ofGroove
forIdentification
ActuatorSize
∅270〜∅330
∅400〜∅650
∅240
∅200
4.6ConformityofCapacityandCharacteristics
⑴ Theorificeplatehastwotypesinaccordancewiththeactuatorsize.Onestandardplatecanbe
compatiblewiththreekindsofsizeofactuator.
⑵ Whenusingeachsizeoforificeplate,alignVgroovepositionoforificeplatewithcutpositionofgasket.
⑶ Whenreplacingorchangingthepositionoforificeplate,removepilotcover,andloosenthreescrews
fixingpilotassembly.
⑷ Generalclassificationforusageoforificeplate,seetablebelow.
⑸ Toinstallboosterrelayforactuatorsize∅270andlarger,useVgroove1oforificeplateNo.1.
⑹ Model 3800actuator ∅280andlarger withratedtravel 15, 20,25mm and springrange
20-100kPaG(0.2-1.0kgf/cm2),useVgroove3oforificeplateNo.1.
Forthepurposeofobtainingstableactuationofpositionerwithsmall-capacityactuatortolarge-capacity
actuator,theModelsEA91AandEA90AElectro-pneumaticPositionerareequippedwithappropriateorifice
plateinaccordancewithactuatorsize.
4.6.1SelectionofOrificePlateforActuatorCapacity
VGroove1
VGroove2
VGroove3
VGroovewith
Black-coating
Linear,
Buit-inCam
Linear,
Buit-inCam
Linear,
Buit-inCam
Linear

13
ModelEA91A＆EA90A
Characteristics ActionRotatingAngle
60°,90°
60°
70°
DA,RA
DA,RA
DA,RA
①Linear
②Eq％
③Eq％
Cam FlangeNut
LinearCam
StartingPoint
ofCam
StartingPoint
ofCam
StartingPoint
ofCam
ExhaustHole
ExhaustHole
7ER
7ED
ERA
RA
EDA
Eq％Cam 70°Eq％Cam
⑴ Thecamforlinearmotionhasthreetypes.Thethreetypes
ofcamaredescribedinthetablebelow.
⑵ Thestartingpointforcharacteristicsandidentificationof
DA(startairsupply)andRA(stopairsupply)arestampedon
thecam.
⑶ Loosenflangenuttoselectcamortoadjustpositionof
cam.
4.6.2SelectionofBuit-inCam
Theexhaustholeofpilotcoverchangesduetoinstallationpositionofthepositioner.Refertothefigure
below,andcheckthetopandbottomofpilotcover.
※Thepilotcoverismachinedtomeetdesignatedpositioniftheinstallationpositionisspecified.However,ifchanging
theinstallationpositioninfield,handlewithextraattention.
4.6.3SelectionofPilotCover
(Availableonlyfor
ModelNo.3993)
BackSideofDA
Installpilotcoverafterpreparing
thethroughhole.
(Theholecanbeopenedbylightly
pushingfromtheinsidewithdriver.)
Top Top
Bottom
Bottom

14
ModelEA91A＆EA90A
4.7.2Model2800Actuator
4.7.3Model2900Actuator
AB D
L
C
A
A 195
BD
L
C
Unit:mm
Actuator
Size
N24
N28
N33S
N40
290
290
290
325
77
77
77
100
45
45
45
58
185
185
185
195
215
225
233
312
ABCDL
Unit:mm
Actuator
Size
240,280
330
400,500
650S
241
241
241
241
125
125
185
185
93
93
143
143
193
205
223
296
250
270
305
405
ABCDL
Unit:mm
Actuator
Size
240H
280H
330H
400H
500H
＃2916B（V）
230
240
240
270
270
＃2992（−A）
250
250
250
265
295
DimensionA
4.7InstallationDimensions
4.7.1Model3800Actuator

15
ModelEA91A＆EA90A
5.1PipingandWiringSystems
5.1.1ModelEA91AElectro-pneumaticValvePositioner(FlameproofExplosion-protectedConstruction)
5.1.2ModelEA90AElectro-pneumaticValvePositioner(IntrinsicSafetyConstruction)
SupplyPressure
SupplyPressure
Electro-controller
Electro-controller
HazardousArea Non-hazardous
Area
HazardousArea
Non-hazardous
Area
SafetyBarrier
AirFilterRegulator
AirFiltereRegulator
ControlValve
ControlValve
ModelEA91AElectro-pneumaticValvePositioner
(OfficialCertif'dNo.TC17951)
ModelEA90AElectro-pneumaticValvePositioner
(OfficialCertif'dNo.TC17899)
EXTERNALCONNECTION5

16
ModelEA91A＆EA90A
ShroudingScrew
TerminalBox
Explosion-protectedNipple
CompoundChargingBox
ConduitTube
InsulatedWire
SUP
SUP
IMPORTANT
①Before piping, fully purge the air tube, and
completelyremovewater,oil,rust,andother
foreignmatters.
②Alwaysusedrycleanairforsupplyair.
5.2PneumaticPiping
5.3ElectricalWiring
⑴ Theelectro-pneumaticvalvepositionerhastwo
connectorsforsupply air (SUP) and outputair
(OUT).TheRc1/4screwedtype isused for
connector.
⑵ For supply air (SUP), perform piping from the
airfilterregulator.
⑶ For outputair(OUT), perform pipingto the
actuator.
⑷ Use∅6/4or∅8/6ofgeneraltypecoppertube
(MOTOYAMAadoptsPVCcoatedcoppertubeas
standard.)
⑸ Aftercompletingconduitpiping,checkforleakage
frompiping.
※If there is a possibility of the influence on the
positioner due to noise, use shielded cable for
avoidingthenoise.
5.3.1 Model EA91A Electro-pneumatic Valve
Positioner (Flameproof Explosion-protected
Construction)
⑴ Connect wires in accordance with the wiring
diagraminItem5.1.1.
⑵ The parallel pipe female thread G1/2 (PF1.2)
femalescrewisusedforconduitconnection.
⑶ Perform wiring in accordance with leading
procedureforexternalconduitreferringto"New
RecommendedPracticeforExplosion-protected
ElectricalInstallations".

5.3.1.1LeadingProcedureforFlameproofThread
ConnectingTypeofConduitTube
⑴ Performthreadconnectionsecurelyusingsteel
plateconduittube(JISC8305)andlocknut(JIS
C8330)forsteelplateconduittube.
⑵ Placesealingfittingnearleadingportofconduit
tube,andmaketheleadingopeningairtightwith
compound.
⑶ ForconnectionofEA91AElectro-pneumaticValve
Positionerwithterminalbox,accessoriesforwiring,
conduittubeofsealingfitting,etc.,fixwithlocknut
withmore than6threadsof effectivethread
connected.Also,make the portwatertight atthe
sametime.
5.2.1Piping
(FlameproofType
SealingFitting)
WARNING
DA(DirectAction)
RA(ReverseAction)
ExampleofLeading
ExternalConduit
OUT
OUT

17
ModelEA91A＆EA90A
KXB-LO-16
(Standard)
BasicShapeof
RubberPacking
KXB-LO-16F
(SpecialSpecifications)
135
12.5
153.5
31
⑹ Tightenunioncouplingandunioncover.
Unit :mm
NominalSize
ofPacking
OuterDiameter
ofCable
InsideDiameter
ofPacking
∅d
10
11
∅10
∅11
∅9.1〜10
∅10.1〜11
∅20
∅D
TerminalCover
ShroudingScrew
SpecialORing
ORing
ORing
HexagonSocketHeadSetScrew
Clamp
CableGland
UnionCover
UnionCouplingwithSetScrew
LeftSide(＋) RightSide(−)
LockNut
ConnectingBody
RubberPacking
Washer
WARNING
Forconnectorofflameproofpackingtype,use
the followingtwo connectorscertifiedat the
sametimeofEA91AandEA91AC.
①KXB-LO-16(Standard)
②KXB-LO-16F
(Specified,SpecialSpecifications)
※Impossibletouseconnectorotherthantwo
connectorsdescribedabove.
※Thecabletobeconnectedshallbeequal

toorbetterthanvinylinsulatedvinylsheath
cableforcontrol"CVV"(JISC3401).
⑴ Processendofcableusingcrimp-style
terminal.Refertothetableshownbelow
foroutsidediameterofcable.
⑵ Screw-inconnectingassemblytoter-
minalbox,andfixwithlocknut.
⑶ Insert cable gland, union coupling, and
unioncovertothecable.
⑷ Then,insertwasherandrubberpackingto
thecable,screw-incableglandsecurely,and
lockthehexagonsocketheadsetscrewto
tightenclamp.
⑸ Twotypesoftherubberpackingforcable
areincluded.
5.3.1.2LeadingProcedureforFlameproof
PackingType(OptionalSpecifications)⑴ Loosentheshroudingscrew(M3Hexagon
SocketSetScrew),andremoveterminalcover.
⑵ Connectcabletoterminalblock.
TerminalScrewSize:M4
StandardWiring(PositionerWiring)

RightTerminal(−)(BlackColoredLeadWire)
LeftTerminal(+)(RedColoredLeadWire)

ReversePositioner(ModelEA90Aisnotapplicable)
RightTerminal(RedColoredLeadWire)
LeftTerminal(BlackColoredLeadWire)
Evenifconnectingreversepositioner,perform
wiring in accordance with the indication of
terminal.(Wiringhasbeenconvertedandad-

justedtoreversepositionerbyMOTOYAMA.)
⑶ Aftercompletingconnection,screw-inthe
shroudingscrewtoterminalcover,andlock
theshroudingscrew.
5.3.1.3ConnectingProcedure
Ground
CrossRecessedHeadandPanHeadScrew

18
ModelEA91A＆EA90A
CAUTION
5.3.2ModelEA90AElectro-pneumaticValvePositioner(IntrinsicallySafeExplosion-protectedConstruction)
■WiringProcedure
TheModelEA90AElectro-pneumaticValvePositionerisdesignedtoensureintrinsicallysafe.However,
electricormagneticenergyfromotherelectricapparatusesandwiresmaycauseadverseaffectionson
theintrinsicsafetysystem.Toavoidtheseaffections,performexternalwiringinaccordancewiththe
instructionsdescribedbelow.Fordetails,referto"NewRecommendedPracticeforExplosion-protected
ElectricalInstallations".
⑴ Identifyintrinsically safecircuits andun-instrinsicallysafecircuits,andseparateintrinsicallysafe
circuitsfromotherelectriccircuits.
⑵
Takeappropriatemeasurestopreventinfluencessuchaselectrostaticinductionandelectromagnetic
induction.
⑶ Minimizeinductanceandcapacitanceofthewiresasmuchaspossible,andalwaysmakethemlower
thanmaximumvalueifoperatingconditionisspecified.
⑷ Protectthewiresagainstexternaldamages.
⑸ Besuretogroundunchargedopenmetallicparts.
⑴ ConnectwiresinaccordancewiththewiringdiagramshowninItem5.1.2.
⑵ TheparallelpipefemalethreadG1/2(PF1/2)femalescrewisusedforconduitconnection.
⑶ ConditionforExternalWiringofIntrinsicallySafeCircuit:
Settheparameterofintrinsicallysafecircuitandtheparameterofsafetybarriersothattheconditions
describedbelowaresatisfied.
Lw≦Lo
Cw≦Co
Lw:InductanceofExternalWiringofIntrinsicallySafeCircuit
Lo :PermissibleInductanceofIntrinsicallySafeCircuit
Cw:CapacitanceofExternalWiringofIntrinsicallySafeCircuit
Co :PermissibleCapacitanceofIntrinsicallySafeCircuit
EffectiveinternalinductanceandeffectiveinternalcapacitanceofEA90AElectro-pneumaticValve
Positionerarenegligiblysmall.
⑷ UseinsulatedwiresorcablesforIntrinsicallySafeExplosion-protectedConstruction.Usemetaltubes,
metalconduits,ormetalprotectivetubesasneededtomechanicallyprotectexternalwiringandprevent
induction.
⑸ PlacetheModelEA90AElectro-pneumaticValvePositionerawayfromotherelectricapparatusas
faraspossible,andseparateitswiringfromtheothers.