20-50V DC Max 4.2A CNC Digital DM542 2-phase Digital Stepper Motor Driver

20-50V DC Max 4.2A CNC Digital DM542 2-phase Digital Stepper Motor Driver

Specification

• Model Name: DM542

• Type: 2-Phase Digital Stepper Motor Driver

• Control Method: Pulse + Direction (PUL/DIR)

• Motor Compatibility: 2-phase and 4-phase hybrid stepper motors

• Recommended Motor Types:

• NEMA 17, 23, and 24 (bipolar stepper motors)

• Rated current: ≤ 4.2A

Input Power Requirements

• Power Supply Voltage: 20V to 50V DC

• Recommended Supply Voltage: 36V to 48V DC

• Maximum Input Current: ≤5A (based on load)

• Protection Features:

• Overvoltage Protection

• Undervoltage Protection

• Overcurrent Protection

• Overheating Protection

• Short-circuit Protection

Output (Motor Drive) Specifications

• Peak Output Current: 1.0A to 4.2A (adjustable via DIP switch)

• Current Resolution: 8 selectable settings (from 1.0A to 4.2A)

• Current Control Type: Advanced bipolar constant current chopper control

• Holding Current: Reduced automatically when idle to reduce heat (default 50%)

• Step Resolution: 1 to 128 microsteps

• Step Modes:

• Full Step

• Half Step

• Microstep modes (1/2, 1/4, 1/8, …, 1/128)

Input Signal Interface

• Logic Signal Voltage:

• Low Level: 0 – 0.5V

• High Level: 4 – 5V (compatible with 3.3V/5V logic)

• Signal Inputs:

• PUL+ / PUL− (Pulse Input)

• DIR+ / DIR− (Direction Input)

• ENA+ / ENA− (Enable Input)

• Input Signal Frequency: Max 200 kHz

• Isolation: Opto-isolated input terminals for noise immunity

DIP Switch Settings

• Current Setting DIP Switch (SW1–SW3):

  SW1	SW2	SW3	Peak Current (A)	RMS Current (A)
  OFF	OFF	OFF	1.00	0.71
  ON	OFF	OFF	1.46	1.04
  OFF	ON	OFF	1.91	1.36
  ON	ON	OFF	2.37	1.69
  OFF	OFF	ON	2.84	2.03
  ON	OFF	ON	3.31	2.36
  OFF	ON	ON	3.76	2.69
  ON	ON	ON	4.20	3.00

• Microstep Setting DIP Switch (SW5–SW8):

  SW5	SW6	SW7	SW8	Microstep
  OFF	OFF	OFF	OFF	400
  ON	OFF	OFF	OFF	800
  OFF	ON	OFF	OFF	1600
  ON	ON	OFF	OFF	3200
  OFF	OFF	ON	OFF	6400
  ON	OFF	ON	OFF	12800
  OFF	ON	ON	OFF	25600
  ON	ON	ON	OFF	51200
  OFF	OFF	OFF	ON	1000
  ON	OFF	OFF	ON	2000
  OFF	ON	OFF	ON	4000
  ON	ON	OFF	ON	5000
  OFF	OFF	ON	ON	8000
  ON	OFF	ON	ON	10000
  OFF	ON	ON	ON	20000
  ON	ON	ON	ON	25000

Mechanical Specifications

• Enclosure Type: Aluminum heat sink with air vents

• Cooling Method: Natural air cooling or forced air cooling

• Dimensions: 118mm × 75.5mm × 34mm (L × W × H)

• Weight: ~280g

• Mounting Method: Vertical panel mounting / DIN rail (optional)

• Connectors: Screw-type terminal blocks

Typical Applications

• CNC Machines (Milling, Laser, Plasma, Engraving)

• 3D Printers & Plotters

• Robotics and Actuator Control

• Industrial Automation Systems

• Camera Sliders, Telescopic Machines, Conveyor Systems

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