78AC-3P-3 phase stepper driver

Description of 3 phase stepper driver PSD78AC-3P/3 phase stepping driver KeyFeatures: AC80to220VSupplyVoltage H-Bridge,3PhaseBi-polarMicro-steppingDrive Suitablefor3-phase,stepmotors,withNemasize23to42 Outputcurrentselectablefrom1.8 7.8Apeak Currentreductionby50%automatically,whenmotorstandstillmodeisenabled PulseInputfrequencyupto200kHz Opticallyisolated differentialTTLinputsforPulse,DirectionandEnable signalinputs Selectableresolutionsupto12800 steps OverVoltage,CoiltoCoilandCoiltoGroundshortcircuitprotection. Introduction The PSD78AC-3PisoneofthefewDirect-On-LineStepMotorDrive,availableintheindustry,whichcanbesimplypowerupfromtheACpowersourcewithouttheneedofaPowerSupply.Thismakesitcosteffectiveandspaceefficient. PSD78AC-3P isabi-polarthreephasemicro-steppingdriveapplyingpure-sinusoidalcurrentcontroltechnique.Ithadthepotentialofdeliveringmoretorquewithsmoothersteppingmotionwithathreephasemotor.Thisresultsinlowervibrationandhigherperformanceascomparedtothetwophasetype.Itisbestsuitedforapplicationsthatdesireextremelowspeedsmoothmotion,especiallyinmulti-axeslinearandcircularinterpolatedapplication,orapplicationthatissensitivetovibration,atextremeslowspeed. ThehighervoltageinputofthePSD78AC-3Pmakeitpossibletoexciteathreephasebi-polarhybridstepmotor,withsizefromNema23uptoNema42. Withprecisecurrentcontroltechniqueandoptimizationinspeedcontrol,thisthreephasePowerStepdriveiswellsuitedforthreephasehybridstepmotor,producingaperformanceclosetoabrushlessDCservooperation. CurrentSetting : CurrentSetting(A) SW1 SW2 SW3 1.8 OFF OFF OFF 2.5 ON OFF OFF 3.5 OFF ON OFF 4.3 ON ON OFF 5.2 OFF OFF ON 6.0 ON OFF ON 7.0 OFF ON ON 7.9 ON ON ON Microstep Setting Step/Rev SW5 SW6 SW7 SW8 200 OFF OFF OFF OFF 400 ON OFF OFF OFF 500 OFF ON OFF OFF 800 ON ON OFF OFF 1000 OFF OFF ON OFF 1250 ON OFF ON OFF 1600 OFF ON ON OFF 2000 ON ON ON OFF 2500 OFF OFF OFF ON 3200 ON OFF OFF ON 4000 OFF ON OFF ON 5000 ON ON OFF ON 6400 OFF OFF ON ON 8000 ON OFF ON ON 10000 OFF ON ON ON 12800 ON ON ON ON