M542 Economical Microstepping DriverManualV1.0
Tel: +086 0755-26434369 3WebSite: www.leadshine.com
3. PinAssignmentand Description
TheM542hastwo connectors, connector P1forcontrolsignalsconnections,andconnectorP2for
powerandmotorconnections. Thefollowingtablesarebriefdescriptionsofthetwo connectorsofthe
M542. More detaileddescriptionsof thepins and relatedissuesare presentedinsection4,5,9.
ConnectorP1Configurations
PinFunction Details
PUL+(+5V)
PUL-(PUL)
Pulsesignal: Insinglepulse(pulse/direction)mode,thisinputrepresentspulse
signal,effectivefor eachrisingorfalling edge(setbyinsidejumperJ1); 4-5V
whenPUL-HIGH,0-0.5VwhenPUL-LOW.In double pulse mode
(pulse/pulse),thisinputrepresentsclockwise(CW)pulse，effectivefor high
levelorlowlevel(setbyinsidejumperJ1).For reliableresponse, pulsewidth
should belongerthan2.5μs. Seriesconnect resistorsforcurrent-limiting when
+12Vor +24Vused.
DIR+(+5V)
DIR-(DIR)
DIR signal: Insingle-pulse mode,thissignalhaslow/highvoltagelevels,
representing twodirectionsof motor rotation;in double-pulsemode(setby
insidejumperJ3),thissignaliscounter-clock(CCW)pulse，effectivefor high
levelorlowlevel(setbyinsidejumperJ1).Forreliablemotionresponse, DIR
signalshould beaheadof PULsignalby5μsatleast.4-5VwhenDIR-HIGH,
0-0.5VwhenDIR-LOW.
ENA+(+5V)
ENA-(ENA)
Enablesignal: Thissignalisusedforenabling/disabling thedriver.High level
(NPNcontrolsignal,PNPand Differentialcontrol signalsareonthecontrary,
namelyLow levelfor enabling.)forenablingthedriverand low levelfor
disablingthedriver.Usuallyleft UNCONNECTED (ENABLED).
SelectingEffectivePulse Edge orEffectiveLeveland Control Signal Mode
Therearetwo jumpersJ1and J3insidetheM542 specificallyfor thepurposeofselecting effective
pulseedgeor effectiveleveland controlsignalmode,asshown in figure2.Default setting is
PUL/DIR mode and upward-rising edgeeffective.
(a)J1, J3 opencircuit (b) J1 short circuit, J3 opencircuit
PUL/DIRmodeand effectiveat upward-risingedgePUL/DIRmodeand effectiveat downward-falling edge
(c)J1 opencircuit, J3short circuit(d) J1, J3short circuit
CW/CCWmodeandeffectiveCW/CCWmodeand effective
at high level (Thefixedlevel)at low level (Thefixedlevel)
Figure2: J1and J3jumpers
M542 Economical Microstepping DriverManualV1.0
Tel: +086 0755-26434369 4WebSite: www.leadshine.com
ConnectorP2Configurations
Pin Function Details
GND DC powerground
+V DC powersupply,20~50VDC,Includingvoltagefluctuation and EMF
voltage.
A+, A- Motor PhaseA
B+,B- Motor Phase B
4. ControlSignalConnector(P1)Interface
TheM542 canacceptdifferentialand single-endedinputsignals(includingopen-collectorand PNP
output).TheM542 has3opticallyisolatedlogicinputswhicharelocatedon connector P1to accept
linedrivercontrol signals.These inputs areisolatedtominimizeoreliminateelectricalnoisescoupled
onto thedrivecontrol signals.Recommend uselinedrivercontrolsignalsto increasenoiseimmunity
of thedriverininterferenceenvironments.Inthefollowing figures,connectionsto open-collector and
PNPsignalsareillustrated.
Figure3: Connections toopen-collectorsignal (common-anode)
Figure4: ConnectiontoPNPsignal (common-cathode)
