Baldor MN1940 Logic inputs, Logic input descriptions, Step clock orange flying lead

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4.3 Logic inputs

The DSM has three optically isolated logic inputs. These inputs are isolated to minimize or eliminate electrical noise coupled onto the drive control signals, and are over-voltage protected. The inputs may be configured as either sinking inputs or sourcing inputs (model dependent, see section 4.3.3), with the Optocoupler Reference (white) lead as the reference. This allows the DSM to be interfaced to a variety of controllers.

 

DSM

 

Optocoupler

470R

HCPL0630

 

 

reference

 

 

Step clock

 

 

input

 

 

 

470R

HCPL0630

Direction

 

 

input

 

 

 

750R

PS2701-1

 

 

Enable input

 

 

Figure 8 - Opto-isolated digital input circuit (sinking only)

4.3.1 Logic input descriptions

4.3.1.1Step clock (orange flying lead)

The step clock input is where the motion clock from the control circuitry will be connected. The motor will advance one microstep in the plus or minus direction (based upon the state of the direction input) on the step clock edge that causes the opto-isolator to be active. The size of this increment or decrement will depend on the microstep resolution setting. The maximum frequency on the step clock input is 2.0 MHz, with a minimum pulse width of 400 ns.

4.3.1.2Direction (blue flying lead)

The direction input controls the CW/CCW direction of the motor. A logic high (default, unconnected) will cause the motor to rotate in the CW direction (seen while looking at the face of the motor). A logic low on the input will cause the motor to rotate in the CCW direction. This input is synchronized to the positive going edge of the step clock input. The direction input may be connected by means of a switch.

4.3.1.3Enable (brown flying lead)

This input can be used to enable or disable the driver output circuitry. A logic high (when the enable switch is open, see Figures 9 and 10), causes the driver outputs to be enabled and step clock pulses will cause the motor to advance. A logic low (when the input switch is

4-4 Input / Output

MN1940

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Contents DSM S-Series Integrated Stepper Motor / Driver Page Contents Troubleshooting General Information Safety Notice PrecautionsDSM S-Series integrated motor and driver MN1940 IntroductionOption availability Model ‘F’ ‘P’ ‘M’Identifying the catalog number InstalledReceiving and inspection Phase Units and abbreviationsLocation requirements You should read all the sections in Basic InstallationIntroduction Mounting the DSM Dimensions DSMS17Dimensions Weight Screw thread limitation DSMS17 Dimensions DSMS23 DSMS23x-1BDSMS23x-2B DSMS23x-3BSecuring DSM cables Dimensions DSMS34Motor Dimensions Other requirements for installation SPI interface ‘P’ connector Basic connectionsMotor power input Cable length Minimum Wire sizesPower wire ratings Enable brown flying lead Logic inputsLogic input descriptions Step clock orange flying leadInput timing Sinking / sourcing input configuration Sinking input configurationsDIR0 Pin Name Description SPI connectorSPI interface SPI signal descriptions NextMove ESB Connection summary minimum system wiringX12 Installing the virtual COM port driver Connecting the DSM to the PCInstalling the USB driver \BaldorSPIInterface.exe Installing Baldor SPI InterfaceDetermining the virtual COM port number Starting the controller and DSM Configuration parameters Motion settings viewName Range Units Default Baldor SPI InterfaceMicrostep Resolution Select Msel Hold Current Delay Time HcdtRecall! and Upgrade! menu options Msel valueClock IOF 2.2 I/O settings viewClock Type Problem diagnosis Communication problemsSymptom Check Further supportMotor control problems Input current maximum Input powerMaximum supply voltage +48VDC +75VDC DSMS17x-1A Detent torqueRotor inertia DSMS17x-2ADSMS17x-3A DSMS23x-1B DSMS23x-2BDSMS23x-3B Motor speed & torque DSMS34 DSMS34x-1BDSMS34x-2B DSMS34x-3B Digital inputs Specifications MN1940 Index Index MN1940 Comments CommentComments MN1940 Page LT0227A02
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