Modular Multifunction Electronic Load PLZ-U SERIES Two load models (75 W/150 W) and two frame models (3 ch/5 ch) High-speed response supporting a maximum slew rate of 2.4 A/μs (PLZ150U) Minimum setting resolution of 10 μA (PLZ70UA) or 20 μA (PLZ150U) 0-V input operating voltage model (PLZ70UA) Up to five load modules (same model) can be operated in parallel. Frame control allows your system to be expanded to a multi-channel system configuration supporting up to 25 channels. Timer functions combined with time/voltage measurement functions enable battery discharge characteristic evaluations. The system features sequence and switching functions and is provided with GPIB and RS-232C ports as standard. * Photo is for reference only. Actual configuration will vary depending on application. Electronic Load 0 V input operating voltage model PLZ70UA
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Modular Multifunction Electronic Load PLZ-U SERIES · Modular Multifunction Electronic Load PLZ-U SERIES Two load models (75 W/150 W) and two frame models (3 ch/5 ch) High-speed response
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Modular Multifunction Electronic LoadPLZ-U SERIES
Two load models (75 W/150 W) and two frame models (3 ch/5 ch)High-speed response supporting a maximum slew rate of 2.4 A/μs (PLZ150U)
Minimum setting resolution of 10 μA (PLZ70UA) or 20 μA (PLZ150U)0-V input operating voltage model (PLZ70UA)
Up to five load modules (same model) can be operated in parallel.Frame control allows your system to be expanded to a multi-channel system configuration supporting up to 25 channels.Timer functions combined with time/voltage measurement functions enable battery discharge characteristic evaluations.
The system features sequence and switching functions and is provided with GPIB and RS-232C ports as standard.
* Photo is for reference only. Actualconfigurationwillvarydependingonapplication.
Multi-Channel Load Systems Can Be Built Easily! Operating Multiple Units in Parallel Offers Large Capacity!
■ PLZ-USeriesComponentProductneme Modelname Operatingvoltage Current Power RemarksLoadUnit PLZ70UA 0V to 150V 15A 75WLoadUnit PLZ150U 1.5V to 150V 30A 150W
●Compact, lightweight body●High-speed response●High precision and high resolution●Variable slew rate●0-V input●Multi-channel system
ThePLZ-USeriesprovidesasetofcompact,high-performancemulti-channelelectronicloadsystemscapableofoperating in threemodes - constant current, constant resistance, and constant voltage.Adopting themodular(plug-in)design,theSeriesconsistsoffourmodels-twoframemodelsandtwoloadunitmodels.ThePLZ-30Fframecanconfiguretheloadunitsuptothreechannels,andthePLZ-50Fframecanconfigureuptofivechannels.Twoloadunitmodelsareavailable,thePLZ-70UA(75-wattloadthatoperatesevenat0V)andPLZ-150U(150-wattloadthatoperatesfrom1.5Vup).Loadunitscanbeoperatedinparalleltoincreasethecurrentcapacityorpowercapacity.Bycombiningdifferentmodelsofloadunitsandframe,thepowercapacitycanbechangedfrom75Wto750W(whenfivePLZ150UunitsaremountedinaPLZ-50Fframe).SupportingtheGPIBandRS-232Cinterfacesasstandard,theelectronicloadcanbebuiltintovarioustypesoftestsystems,makingitusefulintestingfuelcells,secondary cells,DC/DCconverters, switchingpower supplies,multiple-output power supplies, andmore.Bothinterfaces support IEEE488.2aswell as theStandardCommands forProgrammable Instruments (SCPI)commands,developedfortestingandmeasuringinstruments.
*PleaserefertoP15forthecombinationlist.
3
Electronic Load
PLZ-U Series
■ Compact, lightweight bodyTheelectronicloadsystemisaswideasa19-inchrackwithaheightof3U.Weighingabout 11 kgwhen configuredfor three channels or about 17 kgwhenconfigured for five channels, the systemiscompact,lightweightandspace-saving.
■ High-speed responseIn constant currentmode, theelectronicload is capableof offeringhigh-speedresponseataslewrateof2.4A/μsattherisingand fallingedgesof the current(equivalenttoabout10μswhenconvert-edtotheriseandfalltimes;inthecaseofPLZ150U).Thisallowstransientresponsetests for direct current power suppliesandsimulationsusingdummyloadstobeconductedunder highly realistic loadconditions.
■ High precision and high resolutionThebuilt-in three-range configurationprovidesbothwidedynamic rangeandhighprecision.The voltmeter, ammeterandwattmeter functions that displayvaluesusinguptofivedigitseachandaminimumsettingresolutionofeither10μA (PLZ70UA)or 20μA (PLZ150U)areimplemented.
■ 0-V inputThePLZ70UAmodel operates evenwhentheinputoperatingvoltageis0V.This feature is indispensable for testingsingle-cellfuelcells.Thecontinuingtrendtoward lower power consumptionandsemiconductorprocessminiaturization isdrivingsemiconductordevicestooperatewithincreasinglylowervoltages.ThismakesPLZ70UAsuitable for usewhenevaluatingsuchpowersupplies.
■ Sequence function to enable load simulationsInconstantcurrentorconstantresistancemode,sequenceprograms,eachconsist-ingof up to 255 steps, canbe createdwithaminimumstepexecutiontimeof1ms.A separateprogramcanbe runindepen-dently at the same timeonachannel-by-channelbasis.
■ External control functionsYoucanactivate the inputofanexternalreference voltageand turnonor off theloadforeachchannelindividually.Throughtheframecontrolterminals,youcanperformchannel-synchronizedABCpresetmemory call, setupmemory call,andloadon/offoperations.
■ Frame controlYoucanconnecttwoormoreframesanduseoneofthemtocontroltheothers(upto f ive frames canbe connectedat atime).This enables you to turnonor offtheloadandcallpresetvalues.
■ Multi-channel systemPLZ-50Fmaybe configuredwith up tof ive channels, andPLZ-30Fmay beconfiguredwithuptothreechannels.Isolated fromeachother, the channelscanoperateboth independently and insynchronization.Differentmodelsofloadunits (PLZ150UandPLZ70UA) canbehousedinasingleframe.
■ Parallel operation for increased capacityUptofiveloadmodulesmaybeoperatedin parallel, provided that adjacent loadmodules are of the samemodel. Forexample,when f ive loadmodulesareparallel connected in aPLZ-50F frame,the systemcan functionasa375-wattload if theparalleled loadmodulesarePLZ70UAsor asa750-watt load if theparalleledloadmodulesarePLZ150Us.
This key is used to selectwhether the current,resistanceorvoltagevaluetobeset.In theCC+CVorCR+CVmode, each time youpresstheSETkey,thecurrentorvoltagevalueisselectedalternately.
17 Range indicators
These indicators indicate the rangesof theCC,CRandCVoperationmodes.
18 Channel indicator
This indicator shows the current ly selectedchannelnumberthatisbeingset.
19 Set value display area
This areadisplays the set value, setupmemorynumber,configurationvalue,etc.
20 Unit indicators
TheLEDindicatestheunitofthesetvalue.
21 SW, SEQ and STORE lamps
Theselampsilluminatewhentheswitchingmodeison,when thesequencemode isonandwhenthe setupmemory is wai t ing to store data,respectively.
Pressingthiskeychangesthepairofmeasurementvaluesshown in themeasurement valuedisplayarea.Youcanswitchamongthefollowingpairsofmeasurement values - voltage/current, voltage/power, current/power,andelapsed time/alarmorload-offvoltage.
12 INDEP key
Thiskeyisusedtomaketheloadmoduleoperateindependently in connectionwith the loadon/offandABCpresetmemoryfunctions.
13 LOAD key
Pressing thiskey turnsonoroff thecurrentflowonallthechannelssimultaneously.Thisloadon/of f func t ion does not take ef fec t fo r thosechannelsoperatinginindependentmode.
Thesekeysareusedtoselectranges.RANGE:Used tochange thecurrent/resistancerange ineachoperationmode. Each timeyoupresstheRANGEkey,thecurrentrangechangestothenextoneinthefollowingorder-L,MandH.VRANGE: In theCV,CC+CVorCR+CVmode,each timeyoupress this keywhileholdingdowntheSHIFTkey,therangetogglesbetweenLandH.
1 Front-panel load input terminals
Theseterminalsareused toconnect thissystemto thedevice to be tested. Identical sets of loadinputterminalsareprovidedonthefrontandrearpanels, andare connected in parallel inside thesystem.
2 Front-panel remote sensing terminals
Sensing linesare connected to these terminals.Identical sets of remote sensing terminals areprovidedon the front and rear panels, andareconnectedinparallelinsidethesystem.
3 LOAD key
4 Range indicators
These indicators indicate the rangesof theCC,CRandCVoperationmodes.
5 Operation mode indicators
These indicators represent theCC,CRandCVoperationmodes.
This connector is used to perform loadon/off,memory cal l and other operat ions f rom theoutside.
1 Rear-panel load input terminals
Theseterminalsareused toconnect thissystemwiththedevicetobetested.Theyareconnectedto the load input terminals on the front panel inparallelinsidethesystem.
2 Rear-panel remote sensing terminals
Sensing linesare connected to these terminalswhencompensatingforvoltagedropsduetoloadwireresistance.Identicalsetsofremotesensingterminals areprovidedon the front and rearpanels, andare connected in parallel inside thesystem.
3 Air vents
Coolingfansexpelairthroughtheseventstokeepthetemperatureinsidethesystemconstant.Therotation speedof the cooling fansare controlledaccordingtotheinternaltemperature.
8 CH CONT
Thisconnectorisusedtoperformloadon/offandex ternal voltage reference control f rom theoutside.Itisalsoequippedwiththeterminalsforcurrentmonitor output andpower supply outputfor control.
4
5
3
7 8
1
2
6
Rear panel
* Photo of PLZ-30F
REAR PANEL EXPLANATION
6
■ Five operation modesThe system is capable of operating in fivemodes - constantcurrent,constantresistance,constantvoltage,constantcurrent+constantvoltageandconstantresistance+constantvoltage.
■ Variable slew rateThe slew ratedetermines the slopeof change in the currentwhenthesetcurrentneedstochangesharplyasinatransientresponsetest.Thissystemletsyousetthecurrentchangerateperunittimeasappropriatefortheselectedcurrentrange.
Slew ratePLZ150U PLZ70UA
CCmode H 0.10to2.40A/μs 0.05to1.20A/μsM 0.10to0.24A/μs 0.05to0.12A/μsL 24mA/μs* 12mA/μs*
CRmode H 0.10to0.24A/μs 0.05to0.12A/μsM 24mA/μs* 12mA/μs*L 2.4mA/μs* 1.2mA/μs*
Resolution 0.01A/μs*Fixedvalue
■ High precision and high resolutionThebuilt- in three-range configurationprovidesbothwidedynamicrangeandhighprecision.Thevoltmeter,ammeterandwattmeter functions that display valuesusingup to fivedigitseach and aminimum set t ing resolut ion of ei ther 10 μA(PLZ70UA)or20μA(PLZ150U)areimplemented.
Measurement display resolutionResolution
Voltmeter 15.75 to 150 V 0.01 V0 to 15.75 V 0.001 V
Ammeter H 0.001 AM 0.0001 AL 0.01mA
Wattmeter Less than 100 W 0.01 W100Wormore 0.1 W
■ 0-V inputThePLZ70UAmodel operatesevenwhen the input operatingvoltageis0V.Thisfeatureis indispensablefortestingsingle-cell fuel cells. The continuing trend toward lower powerconsumptionand semiconductor processminiaturization isdriving semiconductor devices to operatewith increasinglylower voltages. ThismakesPLZ70UAsuitable for usewhenevaluatingsuchpowersupplies.
■ Diverse load on/off operationsBothloadunitsandframeshaveLOADkeysonthem.Theloadon/offoperationslistedbelowareavailable.Youcanchooseanyoftheseoperationsassuitableforyouroperatingenvironment.
■ Frame controlByconnecting twoormore frames,youcanperformchannel-synchronized loadon/off,ABCpresetmemory call and setupmemory call operations for all the channels simultaneouslywhilecontrollinguptofourframesfromasingleframe.
CC(Constant Current)
CR(Constant Resistance)
CV(Constant Voltage)
CC + CV(Constant Current +
Constant Voltage)
CR + CV(Constant Resistance +
Constant Voltage)
Input current I
Inpu
t vol
tage
V
Input current I
Inpu
t vol
tage
VI
0 Input current I
Inpu
t vol
tage
V
0 Input current I
Inpu
t vol
tage
V
0 Input current I
Inpu
t vol
tage
V
0
V
I
R
V
0
R
V
Flat cable
1st frame
2nd frame
3rd frame
2
1
1
2
Performance and Functions
High Basic Performance Functions Available Only inMulti-Channel Systems
7
Electronic Load
PLZ-U Series
■ Parallel operationAdjacentloadmodulesofthesamemodelinstalledinthesameframecanbeoperated in parallel*. Parallel operated loadmodulesare regardedasa single channel, and their totalcurrent and resistance (conductance) valuesareusedasdisplayedandsetvalues. Paralleloperated loadmodulesandstandaloneloadmodulescancoexistinthesameframe.*PLZ-50Fcanaccommodateuptofiveloadmodules.
Number of parallel operated load modules and capacitiesNumberofparalleloperatedloadmodules PLZ70UA PLZ150U
2 30 A/150 W 60 A/300 W3 45A/225W 90A/450W4 60 A/300 W 120 A/600 W5 75 A/375 W 150 A/750 W
■ Sequence functionThesequencefunctionautomaticallyexecutesastoredprogramstepby step in constant current or constant resistancemode.You can set a valueandanexecution time for each stepindividually,whichenables you to performsimulationswithvariouswaveforms. A separateprogramcanbeprepared foreachchannel,andthebackupfunctionretainstheseprogramsevenifthesystemispoweredoff.
Sequence setting parametersMode CC or CRStepexecutiontime 1msto9999s(0=Endofthestep)Maximumnumberofsteps 255Numberofrepetitions 0to9999(9999=Repeatedinfinitely)
■ Elapsed time display and auto load off timerCombiningfourfunctions-elapsedtimedisplay,undervoltageprotection(UVP),loadoffvoltagedisplayandautoloadofftimer-makesitpossibletoperformtwotypesofmeasurementsthatareusefulinbatterydischargetests-measurementofthetimeelapsed from the start of dischargeuntil the final voltage isdetectedandmeasurement of the closed circuit voltageafterthespecifiedtimeelapsesfromthestartofdischarge.
Standalone Standalone M S SStandalone Standalone M S S
M S S M SM S S M S
Program
Step 1Step 2Step 3
Step 256
···
Repeat
10A
5A
Execute (RUN)
Set
val
ue
STEP
1 2 3 4 5 6 7 8
(Step execution time)
1A
Time
Voltage
0
V1V2
V2: Voltage measured after the specified time elapsesV1: UVP detection voltage
T2 T1
T2: Auto load off timerT1: Elapsed time display
Performance and Functions
Support for Advanced Tests
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■ ConfigurationsettingThis function configures the settings related to the systemoperation,communicationenvironment,etc.Thesesettingsarestored in the systemmemoryand calledwhen thepower isturnedon.
■ Ease of operationAlltheknobsandkeysnecessaryforthesettingoperationsareprovidedon the framepanel. You canperform the settingoperationsbyonehandwhile viewing themeasured voltageand current valuesdisplayedona channel-by-channel basis.Theanalog-like rotary knobs,whichemploy rotation speed-sensitiveencoders,and intuitivedesignmake thesystemveryeasytooperate.
■ Numerous protection functionsThe system features the followingprotection functions - overcurrent protection (OCP), over powerprotection (OPP), over-voltageprotection(OVP),undervoltageprotection(UVP),overheatprotection(OHP)andreverseconnectionprotection(RVP).BecausetheOCP,OPPandUVPvaluescanbechangedonaper-channelbasis,youcanoptimizetheprotectionsettingsforeachdevicetobetested.
■ Remote sensing functionThe remotesensing functioncompensates for voltagedrops inloadlines.Itisusedtosetresistanceandvoltagevaluescorrectlyandtomakeaccuratevoltageandpowermeasurements.Particularly, thefunction improvesthetransitionalcharacteristicsin constant voltageandconstant resistancemodes, leading tostableoperation.
■ ABC preset memoriesThreememoriesA,BandCareprovided for each range inconstant current, constant resistanceand constant voltagemodes,andthesetvaluescanbesaved.Thestoredsetvaluescanbecalledfreelyevenwhiletheloadisonandsavedagain.Intheconstantcurrent+constantvoltageandconstantresistance+constantvoltagemodes,theconstantcurrent and constant voltagememoriesand the constantresistanceand constant voltagememories canbe calledandsaved,respectively.
■ Setup memoriesUp to four of the set values listedbelowcanbe saved in thesetupmemories.Thesetvaluesarecalledorsavedforallthechannelssimultaneously.
When the soft start function is not used When the soft start function is used
Device being testedThis system
Set
cur
rent
Set
cur
rent
Soft start time
Performance and Functions
9
Electronic Load
PLZ-U Series
■ External controlsExternal controls are provided using the frame connector(FRAMECONT)andeachchannelconnector(CHCONT).The frame connector (FRAMECONT) lets you perform thechannel-synchronized load on/off, ABCpresetmemory call,setupmemory call, load status output and alarm status
outputoperations.Also, using the channelconnector (CHCONT),y o u c a n p e r f o r m t h eexternal voltage referen-cecontrol,loadon/offandi npu t c u r r en t mon i t o routputoperations.
Pin assignment of connector 1 (valid when ENABLE is at the low level)No. Signalname Input/output Function1 A CallspresetmemoryA.2 B CallspresetmemoryB.3 C CallspresetmemoryC.4 AUX Reserved5 MEM0 Callsetupmemory0.6 MEM1 Input*1 Callsetupmemory1.7 MEM2 Callsetupmemory2.8 MEM3 Callsetupmemory3.9 ENABLE Enablesloadon/off,callingofpreset
■All products contained in this catalogueareequipment anddevices that arepremisedonuseunder thesupervisionofqualifiedpersonnel,andarenotdesignedorproducedforhome-useorusebygeneralconsumers.■Specifications,designandsofortharesubjecttochangewithoutpriornoticetoimprovethequality.■Productnamesandpricesaresubjecttochangeandproductionmaybediscontinuedwhennecessary.■Productnames,companynamesandbrandnamescontainedinthiscataloguerepresenttherespectiveregisteredtradenameortrademark.■Colors,texturesandsoforthofphotographsshowninthiscataloguemaydifferfromactualproductsduetoalimitedfidelityinprinting.■Althougheveryefforthasbeenmadetoprovidetheinformationasaccurateaspossibleforthiscatalogue,certaindetailshaveunavoidablybeenomittedduetolimitationsinspace.■Ifyoufindanymisprints or errors in this catalogue, itwouldbeappreciated if youwould informus.■ Please contact our distributorstoconfirmspecifications,price,accessoriesoranythingthatmaybeunclearwhenplacinganorderorconcludingapurchasingagreement.
■Distributor:
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The software extends the feature of waveform generation and sequence functions.Using a mouse, you can create and edit feel like drawing and filling out the spreadsheet.