Baldor iMN1921 installation manual Stepper axes 0-3 logic outputs

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4.3.2 Stepper axes 0-3 logic outputs

DGND

STEP3

DGND

STEP2

DGND

STEP1

DGND

STEP0

DIR3

BOOST3

DIR2

BOOST2

DIR1

BOOST1

DIR0

BOOST0

J3

	NextMove ST
		ULN2003
	Step	STEP0
	Step	74AHCT244
	Output	74AHCT244
	Output
	GND	DGND

Figure 9 - Stepper output pin header J3, and output circuit (STEP0 shown)

To allow external stepper amplifiers to be used, all of the stepper output signals from the NextMove ST control card are output on a 16-pin header, J3, mounted on the card. There are four sets of stepper motor control outputs, operating in the range 10Hz to 1MHz. The step (pulse), direction and boost signals from the NextMove ST control card are divided into two groups, each group driven by an ULN2003 open collector Darlington output device.

Each ULN2003 has a maximum power dissipation of 900mW at 25°C. The total combined output requirements for the group DIR0 - DIR2 and STEP0 - STEP2 must not exceed this limit. The total combined output requirements of the group DIR3, STEP3 and BOOST0 - BOOST3 must not exceed this limit. The maximum current limit for any individual output in a group is 400mA if only one output is in use, reducing to 50mA if all outputs in the group are in use. These limits are for a 100% duty cycle.

It is recommended to use separate shielded cables for the step outputs. The shield should be connected at one end only.

The STEP2, DIR2 and BOOST2 outputs are also duplicated on the MISC connector.

4-8 Input / Output

MN1921

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Contents NextMove ST Motion Controller Page Contents Operation General Information Safety Notice PrecautionsNextMove ST features MN1921 IntroductionReceiving and inspection Phase Units and abbreviationsIntroduction MN1921 Introduction You should read all the sections in Basic InstallationLocation requirements Package dimensions Mounting the NextMove STOther requirements for installation Basic Installation MN1921 Input / Output Connector locations Power connections Operation using combined drive and logic supplyOperation using separate drive and logic supplies Connecting separate drive and logic suppliesStepper outputs Connecting a 4-wire motorStepper axes 0-2 drive outputs Connecting a 6-wire motor Connecting a 8-wire motor Connecting a 8-wire motor, parallel windingsStepper axes 0-3 logic outputs Stepper output pin header J3, and output circuit shownAnalog I/O Analog inputsAnalog output Analog outputDigital I/O Digital inputsUsing a digital input as an Error input Using a digital input as a Limit or Home inputUsing a digital input as a Stop input Auxiliary Encoder inputs Auxstep IN, Auxdir IN, AuxzDigital outputs Digital output DOUT0 shownGlobalerroroutput keyword Error outputDriveenableoutput keyword Jumper settingsLocation Other I/ORS232 serial communication Pin Name Description2 50-pin edge connector RS232 serial port connectionsCan communication Typical can network connectionsJP1 This will connect an internal terminating resistor CANopen and Baldor canConnection summary minimum system wiring Host PCInput / Output MN1921 Starting the NextMove ST Connecting the NextMove ST to the PCInstalling WorkBench Preliminary checksPower on checks WorkBench Help fileStarting WorkBench MN1921 Operation Configuring an axis Selecting a scaleClick Apply Stepper axis testing Testing the outputDigital input/output configuration Digital input configurationDigital output configuration Saving setup information Loading saved information Problem diagnosis SupportMe featureNextMove ST indicators Status displaySurface mount LEDs D3, D4 and D16 Communication Symptom CheckMotor control Input power Output power ValueEquivalent resolution ±10V input Common mode voltage rangeInput impedance 120 Input ADC resolution Bits Output current max Update interval ImmediateOutput current maximum, per axis Stepper axis 0-2 drive outputsUnit Value Maximum output frequency KHz 200 Output voltage Unit Value Output typeEnvironmental Unit Value SignalCan interface Channels Protocols CANopenIndex Index MN1921 Comments CommentComments MN1921 Page LT0184A00