Baelz Automatic BA 373-E45 User manual

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BA_373-E45_05_DEF_MJ_2119
Operating Instructions BA 373-E45
Motorized Linear Actuator baelz 373-E45
Technicalspecicationssubjecttochangewithoutnotice CopyrightaccordingtoISO16016

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Motorized Linear Actuator baelz 373-E45
Table of Contents
1. SAFETY 4
1.1 Intendeduse 4
1.2 Instructionsfortheoperator 4
1.3 Personnel 5
1.4 Beforestartingwork 5
1.5 Duringoperation 5
1.5.1 Transport,installationandassembly 5
1.5.2 Maintenanceandrepair 5
1.6 Workingenvironment 5
2. PRODUCT DESCRIPTION 6
2.1 Identication 6
1.7 Motorizedlinearactuator 6
2.2 TechnicalSpecications 6
2.4 Accessoriesandoptions 7
2.3 Type name 7
2.5 Operatingconditions 7
3. TRANSPORT AND STORAGE 7
4. ASSEMBLY 8
4.1 Fittingposition 8
4.2 Assemblywiththevalve 9
4.3 Principle of operation 10
4.3.1 Manualadjustment 10
4.4 Electrical connection 11
4.5 Carryingouttheelectricalconnection 11
5. COMMISSIONING 12
5.1 Limitswitchsettings 12
5.2 Testrun 12
5.2.1 Checkingthedirectionofrotation 12
5.2.2 Switchingoffinendpositions 12
6. FITTING THE POTENTIOMETER ASSEMBLY 13
6.1 Installingthepotentiometerassembly 13
6.2 Adjustingthepotentiometerassembly 14

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Motorized Linear Actuator baelz 373-E45
7. FITTING THE 7020A DIGITAL POSITIONER 15
8. DIGITAL POSITIONER 7020A 19
8.1 Intendeduse 19
8.2 Operationalmodesandoperatingoptions 19
8.2.1 StandardoperationusingDIPswitches 19
8.2.2 StandardoperationusingModbusVT100ordirectaddressing 19
8.2.3 Modbusmode 19
8.2.4 Normalandsafetymodes 20
8.2.4.1Safetymode:freezeprotectionandexcessivetemperature 20
8.2.5 3-pointcontrolwithacontinuousoutputsignal 20
8.3 Wiringdiagramsandallocationofconnectionterminals 20
8.3.1 Wiringdiagram 20
8.3.2 Allocation of connection terminals 21
8.4 CongurationoftheDIPswitches 22
8.4.1 DetailsonDIPswitches 23
8.5 Commissioning 25
8.5.1 Quickstartguide 25
8.5.2 Initializationrun 25
8.5.3 MeaningofLEDsignals 26
8.6 Errors 27
8.6.1 Errorsafteraninitializationrun 27
8.6.2 Errorsduringnormalpositioneroperation 28
8.7 TechnicalSpecications 29
8.8 Accessoriesandoptions 29
9. HEATING - RETROFITTING THE HEATING ELEMENT 30
10. SPARE PARTS 31
11. DECOMMISIONING AND DISPOSAL 32
12. TROUBLESHOOTING 32
12.1Checklistforoperationalmalfunctions 33
13. DIMENSIONAL DRAWINGS 34

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Motorized Linear Actuator baelz 373-E45
1. SAFETY
Readtheseoperatinginstructions,inparticularthefollowingsafetyinstructions,carefully
beforeinstallationandoperation.
Beware
  Potentiallyhazardoussituationthatcouldresultinminorinjury.
  Alsoindicatesahazardthatmayresultinpropertydamage.
Beware
Caution
  Potentiallyharmfulsituationinwhichtheproductoranobjectinits
  vicinitymaybedamaged.
Caution
Danger
  Imminentdangerofdeathorseriousinjury.
Danger
Warning
  Potentiallyhazardoussituationthatmayresultindeathorseriousinjury.
Warning
Applicationinstructionsandotherusefulinformation.
1.1 Intended use
Baelz373-E45motorizedlinearactuatorsarecontrolledbythree-pointcontrolorconstant
controlincombinationthedigitalpositionerbaelz7020A.Thelinearactuatorsoftheseries
describedinthisdocumentareintendedforthestrokeadjustmentofvalves.
Toensuretheirintendeduse,makesurethattheabovetypeidenticationcomplieswith
thenameplateofthelinearactuatorsbeforestartinganyactivities.Theactualtechnical
specicationsofthelinearactuatorsandthepowersupplyrequirementsarethespecications
indicatedonthenameplate.
Anyuseotherthantheintendedusementionedabove,differenttasks,andoperationwithother
powersourcesthanthosepermitted,isconsideredtobeimproperuse.Incaseofimproper
use,theoperatorshallbesolelyliablefortheriskpresentedtopersonsandthedeviceaswell
as other property!
IntendedusealsoincludescompliancewithaccidentpreventionandDINVDEregulationsas
wellassafeworkingpracticesforallmeasuresdescribedintheseoperatinginstructions,taking
intoaccounttheusualtechnicalregulations.
1.2 Instructions for the operator
Alwayskeeptheoperatinginstructionsavailableattheplacewheretheactuatorisused!
Duringinstallation,operationandmaintenance,observetheapplicableoccupationalsafety,
accidentpreventionandDINVDEregulations.Ifnecessary,observeadditionalregional,local
orinternalsafetyregulations.
Makesurethateverypersonentrustedwithoneofthemeasuresdescribedintheseoperating
instructionshasreadandunderstoodtheseinstructions.
Tip:

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Motorized Linear Actuator baelz 373-E45
1.3 Personnel
Onlyqualiedpersonnelmayworkonthislinearactuatororinitsvicinity.Qualiedpersons
aredeemedtobepersonswhoarefamiliarwiththeinstallation,assembly,commissioningand
operationormaintenanceoftheactuatorsandhavetheappropriatequalicationsfortheirjob.
Necessaryorprescribedqualicationsinclude,butarenotlimitedto:
● Training/instructionandtheauthorizationtoswitchelectriccircuitsanddevices/
systemsonandoffinaccordancewithEN60204(DINVDE0100/0113)andthe
technicalsafetystandards
● Trainingorinstructioninthecareanduseofappropriatesafetyandworkprotection
equipmentinaccordancewithsafetytechnologystandards.
● Firstaidtraining.
Workinasafemannerandavoidanyoperationthatwouldendangerthesafetyofpersonsor
damagethelinearactuatororotherpropertyinanyway.
1.4 Before starting work
Beforecarryingoutanywork,checkwhetherthetypesspeciedherecorrespondtothe
informationonthenameplateoftheactuator:
baelz 373-E45
1.5 During operation
Safeoperationisonlypossibleiftransport,storage,assembly,operationandmaintenanceis
carriedoutinasafe,properandprofessionalmanner.
1.5.1 Transport, installation and assembly
Observethegeneralinstallationandsafetyregulationsforheating,ventilation,airconditioning
andpipingsystems.Usetoolsonlyfortheirintendedpurpose.Weartherequiredpersonaland
otherprotectiveequipment.
1.5.2 Maintenance and repair
Priortomaintenanceorrepair,makesurethatthelinearactuatorisdisconnectedfrompower
byqualiedpersonnelinaccordancewithDINVDEstandards.Thelinearactuatorrequires
littlemaintenance.Werecommendlubricationofthegearwithgrease(KlüberMicrolubeGL
261)every6monthsandsimultaneousremovalofanydepositsonthespindle.Thisrequires
removaloftheactuatorcover.Apartfromthis,theactuatordoesnotrequireanyotherroutine
orperiodicmaintenance.
1.6 Working environment
Notetheinformationonworkingenvironmentinthetechnicalspecications.

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Motorized Linear Actuator baelz 373-E45
1.7 Motorized linear actuator
Thebaelz373-E45isamotorizedlinearactuatorwithload-dependentlimitswitchesforow
controlapplications.Theactuatorsaredesignedforhighlyaccuratepositioninginanindustrial
environment.Theycomecompletewithamanualadjustmentdeviceandawiderangeof
optionsandadditionalextrasareavailable.
Eachactuatorhasanameplateshowingspecicationsregardingthemaximumoperating
conditionsofthedeviceandaunique,order-relatedserialnumber(Fno.).
Fig. 1: Baelz nameplate for motorized actuators
2. PRODUCT DESCRIPTION
2.1 Identication
2.2 Technical Specications
Table 1. Technical Specifications, baelz 373-E45
Actuating force kN 4,0
Positioning speed 1) mm/min 15
Power consumption (230 V) VA 11
Nominal current (230 V) A 0.045
Type of motor synchronousmotor(syn)
Motor protection stall-proofmotor(B)
Maximum stroke mm 44
Supply voltage 2) 24V/115V/230V50/60Hz±10%
Operating mode acc. to IEC 34-1 S1-100%
S3-30%dutycycle1200c/h
Cable glands 3xM20x1.5
Electrical connection internalterminalblock,seewiringdiagramforterminalallocation
Limit switches 2load-dependentlimitswitches,
max.250VAC,ohmicload:max.5A,inductiveload:max.3A
Fitting position asrequired,butnot"headdown"withtheactuatorbelowthevalve
Ambient temperature °C 0 to +50
Gear lubricant KlüberMicrolubeGL261
Position indicator positionofspindlecouplingrelativetoindicatormarksonyoke
Manual adjustment crankhandle
IP-rating according to EN 60529 IP65
Trapezoidal thread Tr14x3
Connection type yokeS21/S21-L/S41
Weight, approx. kg 8.0
1)At60Hzthepositioningspeedandpowerconsumptionbothincreaseby20%.
2)Othersupplyvoltagesavailableuponrequest.CongurationoptionsareindicatedintheBaelzpricelist.

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Motorized Linear Actuator baelz 373-E45
2.3 Type name
2.4 Accessories and options
Table 2. Options for Actuators
2EZ-Fg
Twoadditionallimitswitchesforsignallingendpositionsorintermediatepositions,freelyadjustable,
max.250VAC,ratingforresistiveloadmax.5A,forinductiveloadmax.3A
and
200Ω/1kΩ/5kΩpotentiometer,linearityerror≤0.5%,max.1.5W,contactcurrent30mA,stroke
reducedby[%ohmxactualstroke/44]mm,dependingonvalvestroke
7020A
Digitalpositionerforactuatorcontrol,selfadapting
1inputsignal:0(2)…10V,0(4)…20mAor(3-point)
2outputsignals:0(2)…10Vand0(4)…20mA
1digitalinput,2relaysforfeedbackonendorintermediatepositions,
InterfaceRS485ModbusRTU,incl.5kΩpotentiometer
Hzg Heatingresistorwiththermoswitchagainstmoisturewithautomatictemperatureregulation,
max.15Watts,supplyvoltage24,115,230V50/60Hz
baelz 373 - E45 - 40 - 15 - S21
motorizedlinearactuator actuatortype thrust positioningspeed yoketype
2.5 Operating conditions
Incaseofextremevariationsinambienttemperatureandhighhumiditylevels,installationofa
heatingresistorisrecommendedtominimisecondensationintheactuator.
Actuatorcoverswithsuppressionofthermalbridges(dualcovers)arerecommended.
● Connecttheheatingelement(HZG)asshowninthewiringdiagram.
● Putthedeviceintoserviceassoonasitisinstalled.
Theactuatorsaresuitableforinstallationinindustrialplantsandinwaterworksandpower
plantswithalowpollutantconcentration.
Foruseoutdoorsorinanenvironmentwithahighpollutantconcentration,suchasheavytrafc
areas,industrialareas(chemicalplants,sewageplants,etc.),coastalareasandtheopensea,
theactuatorsmusthaveexternalpartsmadeofnon-corrosivematerialandmustbeprovided
withaspecialcoating.
Whenusedoutdoors,theactuatormustbeprotectedwithanadditionalcoveragainst
●rain
● directsunlight
● strongdraughts
● dust
3. TRANSPORT AND STORAGE
Risk of injury caused by failure to observe safety regulations!
Caution
● Weartherequiredpersonalandotherprotectiveequipment.
● Protectthelinearactuatorfromimpact,shock,vibrationandsimilarinuences.
● Storethelinearactuator(orthecompleteactuator/valveassembly)inadryplace.
● Observethetransportandstoragetemperaturelimitsof-20to+60°C.

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Motorized Linear Actuator baelz 373-E45
4. ASSEMBLY
Make sure that the specications on the nameplate correspond to those in
the order documents!
4.1 Fitting position
Whenttingwiththeconnectingrodinhorizontalposition,tthelinearactuatorsuchthatthe
sidesoftheyokearepositionedoneabovetheotherintheverticalplane.
Risk of damage if no valve is tted to actuator!
Caution
Caution:
● Ifthelinearactuatorisoperatedwithoutavalve,themissingstopmaycausedamage
totheactuator.Theactuatormustthereforenever be operated without a valve.
● Allowforabout200mmspaceabovethecoveratthesiteofinstallation.
● Checktheworkenvironmentbeforettingtheactuatorandputtingitintooperation:
● Makesurethatthevalveiscorrectlyinstalled.Fordetailedinformation,refertothe
valve'sinstallationinstructions.
● Determinethemountingpositionofthelinearactuator.Donotmountlinearactuators
"headdown"belowthevalve.
Attention
Fig. 2: Fitting position

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Y
X
Y=max.88,5mm
min. 46,5 mm
X=max.188mm
min. 142 mm
Motorized Linear Actuator baelz 373-E45
4.2 Assembly with the valve
Priortoassembly,checkthat:
● theoperatingconditionscomplytothespecicationsofthelinearactuator.
● thevalveiscomplete(yokeonactuatororonvalve).
● theconnectionsonvalveandactuatormatch.
Thelinearactuatorissuppliedwiththespindleretracted.
Aslightadjustmentforttingofthecouplingcanbecarriedoutbyturningthespindle.The
followingdimensionsmustbeadheredto,otherwisedamagetotheactuatorcanensue.
Fig. 3: Assembly with the valve
Ensurethattheconnectingrodoftheactuatorandthevalvespindlearecorrectlyaligned.
Misalignmentcanleadtopowerlossandprematurewear.
Whensuppliedwithintegratedpotentiometerassembly,adjustmentoftheassemblymaybe
necessary.
Keep the spindle within the given
stroke range to avoid damage to the
actuator!
Attention

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Motorized Linear Actuator baelz 373-E45
4.3 Principle of operation
Motorizedlinearactuatorstooperatecontrolvalvesforowregulationapplicationsincontrol
andprocesstechnology.Theself-lockingthreadedspindle/spindlenutisdrivenbyanelectric
motorviaagearbox.Thisconvertstherotarymovementintoalinearmovement.Load-
dependentlimitswitchesdictatetheendpositions
4.3.1 Manual adjustment
Manualadjustmentmayonlybecarriedoutwhenthemotorisnotinmotion.Forthe
adjustment,unscrewthecapnutfromthetopofthecover,removethehandcrankfromthe
bracketonthebottomoftheactuatorhousingandinsertitintothetubeinthetopofthecover.
Turnthecrankhandleusinggentlepressure.

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Motorized Linear Actuator baelz 373-E45
4.4 Electrical connection
Risk of electric shock!
Danger
Use an appropriate power supply to ensure that no hazardous voltage can enter the
device during normal operation or in the event of a system failure or defective system
components.
Failure to heed this warning may result in death, serious injury or substantial material
damage.
Forshort-circuitprotectionanddisconnectionoftheactuatorfromthepowersupply,fusesand
switchdisconnectorsmustbeprovidedonsite.Thecurrentvaluesfortheratingdependonthe
operatingcurrentofthemotor(refertothenameplate).
Theelectricalconnectionshouldonlybecarriedoutbytrained,qualiedpersonnel.
● Priortoconnection,observetheinstructionsinthischapter.
● Afterconnection,butbeforeapplyingvoltage,observetheinstructionsinthechapter
"Commissioning"(page12).
● Whenmakingtheelectricalconnection,besurethatthepowersupplyisturnedOFF!
Ensureprotectionagainstunintentionalreconnectiontothepowersupply!
● Forwiringandconnection,observetheregulationsfortheconstructionofelectricpower
installationsandtheregulationsofthelocalenergysupplier!
● Checkcomplianceofthesupplyvoltageandfrequencywiththespecicationsonthe
nameplateoftheactuatorandonthenameplateoftheactuatormotor.
● Alwaysselectthecablecrosssectionsoastomatchtheactuator'spowerconsumption
andtherequiredcablelength.Minimumcrosssectionofthecableforthislinear
actuator:1mm²
In case of malfunction:
DangerousvoltageifprotectiveearthconductorisNOTconnected!Riskofelectricshock!
→Donotoperatethedeviceiftheprotectiveearthconductorisnotconnected!
Trappedwirescanleadtoshortcircuiting!Riskofelectricshockandmalfunction.
4.5 Carrying out the electrical connection
Risk of electric shock!
Danger
→Disconnectthedevicefromthepowersupplybeforeremovingcover.
Alwaysusethewiringdiagramontheinsideofthecoverorsuppliedwiththeactuator.
Replacethedummyplugswithcableglands.
1. Stripthecableasnecessary.
2. Striptheendsoftheindividualwires.
3. Forexiblewires:UsewireendferrulesasspeciedinDIN46228.
4. Connectthewiresasshowninthejob-specicwiringdiagram.
TheIP-ratingshownonthenameplateisonlyvalidifsuitablecableglandsareused.

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Motorized Linear Actuator baelz 373-E45
5. COMMISSIONING
Comparethethrustoftheactuatorandthesettravelwiththevalvespecications.Overloading
canresultinseveredamagetothevalve.
Payattentiontomovingpartsduringttingandadjustment.Riskofinjuryandsubstantial
materialdamage.
Actuators which are supplied tted with a valve are set to the appropriate
valve stroke length. When an actuator with a 7020A digital positioner is
tted to a valve, an initialization run must be carried out to set up the
actuator according to the valve type.
Attention
5.1 Limit switch settings
Bydefault,theactuatorisswitchedoffintheendpositionsbythe"DE"switches(wiring
diagram,Fig.9,page21).Thesearefactory-settotheforceindicatedonthenameplate.
5.2 Test run
5.2.1 Checking the direction of rotation
● Adjusttheactuatormanuallytoroughlythemiddleposition.
● IndirectionoftravelCLOSE,switchtheactuatoronandwatchthedirectionofrotation.
● Ifthedirectionofrotationiswrong,switchoffimmediately.
● Checkwiring(jumpers).
● Repeatthetestrun.
If the direction of travel is set incorrectly, damage to actuator and valve is
imminent as the limit switches will not function with the wrong direction of
rotation!
Attention
5.2.2 Switching off in end positions
Risk of electric shock!
Danger
Iftheswitchesintheactuatorarenotfactory-wired,checkproperswitchingoffinendpositions:
With the cover removed, the linear actuator may only be operated briey for test runs or
when performing absolutely essential adjustments on electrical components, such as
potentiometer, limit switches or positioning electronics.
While performing this activity, there is unobstructed access to hazardous, live, exposed,
moving and rotating parts. Adjustments performed incorrectly or without exercising the
necessary caution may result in death, serious injury or substantial material damage.
Any operation of the linear actuator with the cover removed for a purpose other than
that described above is prohibited.
UseaninsulatedscrewdrivertoactuatetheswitchingrollersoftheDEswitchesasshownin
thewiringdiagram,Fig.9,page21,andcheckthattheeachswitchactuallyswitchesoffthe
motor.Ifnecessary,changethemotorsupplyjumpers.

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Motorized Linear Actuator baelz 373-E45
6. FITTING THE POTENTIOMETER ASSEMBLY
Disconnect actuator from power supply before starting work!
Danger
6.1 Installing the potentiometer assembly
Fitthedistancesleeve(4)ontothethreadedendofthe
connectingrodandtighten.Placethelaminatewasher(2)over
thethreadedendontotheself-lockingnut.Inserttheposition
detectorforthepotentiometerassembly(3)ensuringitengages
intheslotprovidedonthetoothedrod.
Screwanotherlaminatewasher(2)andself-lockingnut(1)onto
thethreadedinsertandslightlytightenthenut
.
Thepotentiometerassemblycanthenbetted(1)andsecuredwiththescrewsprovided(2)
Fig. 4: Fitting the potentiometer assembly

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Motorized Linear Actuator baelz 373-E45
6.2 Adjusting the potentiometer assembly
1. Thepotentiometercanbesettothedenedzeropointusingthescrewslotontherear
(fornormalmodeclockwiseuptothemechanicalstop).Forvalvestroke<44mm,
notethatforreversemode,thepotentiometermustbeturnedtothenewzeropoint
(mechanicalstopopposite).Forthisadjustmenttheactuatorspindlemustbeinthe
correctendposition:
  Normalmode:zeropoint=spindleextended-->potentiometerfullyclockwise
  Reversemode:zeropoint=spindleretracted-->potentiometerfullyanticlockwise
2. Theadditionallimitswitchescanbeadjustedbylooseningandretighteningtheknurled
nutandsettingthecontactwasherstothedesiredpositon.
Fig. 5: Adjusting the potentiometer assembly

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Motorized Linear Actuator baelz 373-E45
7. FITTING THE 7020A DIGITAL POSITIONER
Disconnect actuator from power supply before starting work!
Danger
Theseinstructionsapply,giventhatthepotentiometerassemblyhasbeencorrectlyttedas
describedinsection6.1.
● Removetheextensionandthebrasssleeve.
● InserttheM4x5mmscrewintothelimitswitchplate,butdonottightenit.Putthe
bracketinplace.Nowtightenthescrew.

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● Beforettingtheadaptorpanel,thenameplatemustbestucktotheunderside.Ifthe
digitalpositionerboardistreplaced,thisnameplatemustalsobechanged.
● Placethe4click-tspacerconnectorsontheadaptorpanel.
● Fittheadaptorpaneloverthethreadedendoftheextensionsothatitrestsonthe
bracket.

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● Adjusttheadapterpanelonthebracketsothatthecountersunkholeandtheholein
thebracketarealigned.Inserttheplasticscrewsandtandtightenthenutsonthe
undersideofthebracket.
● Fitthespacersleeveontothethreadandscrewtheextensionon.
● Mountthedigitalpositionerboardontotheclick-tspacerconnectors.Thetransformer
shouldbeonthesamesideasthepotentiometer.

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Motorized Linear Actuator baelz 373-E45
● Wireupthedigitalpositionerboardwiththemotorandthepotentiometeraccordingto
thewiringdiagram7020A,Fig.9,page21.
● Stickthewiringdiagramtotheinsideoftheactuatorcover.Pleasenotethedigital
positionertype-inthiscase"7020A"-ontheactuatornameplateunder"X:".

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8. DIGITAL POSITIONER 7020A
8.1 Intended use
Thedigitalpositionerbaelz 7020Acontrolstheactuatoraccordingtothevalueofthecontrol
signal:0(2)-10V,0(4)-20mA
Toensureuseforthepurposeintended,checkthattheabovetypeidenticationcorresponds
tothenameplateonthepositionerbeforestartinganyactivities.Thetechnicalspecicationsof
thepositionerandthepowersupplyrequirementsaretheindicatedonthenameplate.
Anyuseotherthantheintendedusestatedabove,usefordifferenttasks,andoperation
withotherpowersourcesthanthosepermitted,isconsideredtobeimproperuse.Incaseof
improperuse,theoperatorshallbesolelyliablefortheriskpresentedtopersonsandtothe
deviceaswellastootherproperty!
Theintendedusealsocomprisescompliancewiththeaccidentpreventionregulationsand
theDINVDEstandardsoftheGermanInstituteforStandardizationandtheAssociationfor
Electrical,Electronic&InformationTechnologies.Italsoimpliesworkinginaccordancewiththe
safetyrequirementswhenperformingallactivitiesdescribedintheseoperatinginstructions,
underconsiderationofgeneraltechnicalrulesandregulations.
8.2 Operational modes and operating options
For further information and additional functions, see baelz 7020 operating instructions.
8.2.1 Standard operation using DIP switches
TheDIPswitchescanbeusedtocarryoutstandardcongurationsandoperations(see
section 8.4).
WhenDIPswitch11issetto0,the7020Aisinthestandardoperationalmode.
Instandardmode,allDIPswitchesareactiveandthefunctionsoftheBaelz7020Acanbe
individuallyadapted.Functionswhicharepredenedandunalterableinstandardmodeare
describedinchapter6.1ofthebaelz7020operatinginstructions.
8.2.2 Standard operation using Modbus VT100 or direct addressing
Instandardmode,theBaelz7020AcanbeoperatedusingModbusVT100.Forthis,avirtual
7020Adisplayandavirtual7020Akeypadaretransmittedtoauserinterface.Modbusdirect
addressing,e.g.fromabuildingautomationsystem,enablesaccesstostatusinformationand
allowsoperationandconguration.(Seebaelz7020operatinginstructions,AppendixA).The
settingsgivenbytheDIPswitchesremainactive.ValueswhichareonlyrelevantinModbus
modecanbeadjustedinstandardmode,butonlytakeeffectinModbusmode.
8.2.3 Modbus mode
WhenDIPswitch11issetto1,theBaelz7020AisinModbusmode.InModbusmode,the
7020AisatitsmostexibleandcanbeconguredandoperatedusingeitheraModbusVT100
orModbusdirectaddressing,forexampleinabuildingautomationsystem.Seeseparate
operatinginstructions"Baelz7020DigitalPositioner-OperatingInstructionsforModbusmode"
Tip:

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Motorized Linear Actuator baelz 373-E45
8.2.4 Normal and safety modes
Innormalmodethepositionofthevalveiscontrolledbytheset
valueatanalogueinputAI2.TheN↔Sswitchshowninthepicture
ontherightissettonormalmode(N).Innormalmode,noexternal
controlsystemscanbeconnectedtoterminals12and14.
8.2.4.1 Safety mode: freeze protection and excessive temperature
Insafetymodetheactuatorcanbesenttoasafeposition(extended/retracted,dependingon
thedirectionofactionofthevalve)incaseoffailureormalfunctioningofthemicrocontroller.
TooperatetheBaelz7020Ainconnectionwithanexternalfreezeprotectionand/orexcessive
temperaturethermostat,settheN↔Sswitchtosafetymode(S).
Connectthefreezeprotectionand/orexcessivetemperaturethermostataccordingtodesired
functionandpriority.Besuretotakethedirectionofactionintoaccount!Seewiringdiagrams
inthebaelz7020operatinginstructions.
8.2.5 3-point control with a continuous output signal
1. Setthepositionerupandwiretopowersupplyasdescribed
previouslyandinitializeasdescribedinsection8.5.2.
2. Todeactivatetheerrorsignal,ifdesired,settheDIP-switch11to1
("ON")andchangethefollowingvaluesinthemenuitem"CA"using
WinBasTools(onPC,seebaelz7020operatinginstructions):
●AD to 0
● EFPto0.0%
●LA to 1
(Ifyoudon'tmindtheredLEDerrorsignal,step2canbeleftout
completely.Thishasnoeffectonthefunctionofthepositioner.)
3. SettheN↔Sswitch(Fig.6)to"S"andwireasshowninFig.7(thepositionermust
remainconnectedtothepowersupplythroughout).
4. TherequiredsignalcannowbepickeduponAO1andAO2.
IMPORTANT NOTE:Beforeanyfurtherre-initializationofthedevice,disconnectterminals12
and14andsettheN↔Sswitchtonormaloperation(N).
8.3 Wiring diagrams and allocation of connection terminals
Disconnect actuator from power supply before starting work
See also section 4.4.
Danger
8.3.1 Wiring diagram
Fig. 6: N↔S-switch
Fig. 7: Wiring diagram
3-point-signal
Fig. 8: Wiring diagram
basic actuator