Baldor iMN1921 installation manual Digital outputs, Digital output DOUT0 shown

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4.5.2 Digital outputs

The digital outputs are available across a range of connectors, as shown in section 4.1.1.

H16 general purpose digital outputs

HUpdate frequency: Immediate

There are 16 general purpose digital outputs, arranged in two groups; DOUT0-DOUT7 and DOUT8-DOUT15. Each group is driven by a ULN2803 device. The outputs are designed to sink current from an external supply (typically 24VDC), but have no overcurrent or short circuit protection. When an output is activated, it is grounded through the ULN2803.

The ULN2803 has a maximum power dissipation of 2W at 25°C. The total output requirements of each group must not exceed this limit. The maximum current limit for any output within a group is 500mA if only one output is in use, reducing to 150mA if all outputs in the group are in use. These limits are for a 100% duty cycle.

If the outputs are driving inductive loads such as relays, connect the group’s OUT COMx connection to the output’s power supply, as shown in Figure 13. This will connect internal clamp diodes on all outputs in the group.

An output can be configured in MintMT as a general purpose output, a drive enable output or a global error output. Outputs can be shared between axes and can be configured using WorkBench v5 (or the OUTPUTACTIVELEVEL keyword) to determine their active level.

	NextMove ST
		ULN2803
	MintMT	2
	MintMT	74AHCT244
	OUTX.0	74AHCT244
		10
	GND	11

Output

Load

DOUT0

OUT COM0

DGND

Load supply 24V

Connect OUT COM0 to supply if using inductive loads

Load supply

GND

Figure 13 - Digital output - DOUT0 shown

MN1921

Input / Output 4-13

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Contents NextMove ST Motion Controller Page Contents Operation General Information Precautions Safety NoticeMN1921 Introduction NextMove ST featuresReceiving and inspection Units and abbreviations PhaseIntroduction MN1921 You should read all the sections in Basic Installation IntroductionLocation requirements Mounting the NextMove ST Package dimensionsOther requirements for installation Basic Installation MN1921 Input / Output Connector locations Operation using combined drive and logic supply Power connectionsConnecting separate drive and logic supplies Operation using separate drive and logic suppliesConnecting a 4-wire motor Stepper outputsStepper axes 0-2 drive outputs Connecting a 6-wire motor Connecting a 8-wire motor, parallel windings Connecting a 8-wire motorStepper output pin header J3, and output circuit shown Stepper axes 0-3 logic outputsAnalog inputs Analog I/OAnalog output Analog outputDigital inputs Digital I/OAuxiliary Encoder inputs Auxstep IN, Auxdir IN, Auxz Using a digital input as a Limit or Home inputUsing a digital input as a Stop input Using a digital input as an Error inputDigital output DOUT0 shown Digital outputsJumper settings Error outputDriveenableoutput keyword Globalerroroutput keywordPin Name Description Other I/ORS232 serial communication LocationRS232 serial port connections 2 50-pin edge connectorTypical can network connections Can communicationCANopen and Baldor can JP1 This will connect an internal terminating resistorHost PC Connection summary minimum system wiringInput / Output MN1921 Preliminary checks Connecting the NextMove ST to the PCInstalling WorkBench Starting the NextMove STPower on checks Help file WorkBenchStarting WorkBench MN1921 Operation Selecting a scale Configuring an axisClick Apply Testing the output Stepper axis testingDigital input configuration Digital input/output configurationDigital output configuration Saving setup information Loading saved information SupportMe feature Problem diagnosisStatus display NextMove ST indicatorsSurface mount LEDs D3, D4 and D16 Symptom Check CommunicationMotor control Output power Value Input powerOutput current max Update interval Immediate Common mode voltage rangeInput impedance 120 Input ADC resolution Bits Equivalent resolution ±10V inputUnit Value Output type Stepper axis 0-2 drive outputsUnit Value Maximum output frequency KHz 200 Output voltage Output current maximum, per axisChannels Protocols CANopen Unit Value SignalCan interface EnvironmentalIndex Index MN1921 Comment CommentsComments MN1921 Page LT0184A00