DM860H DM860 Stepper Motor Driver 2-Phase Nema34 AC/DC

DM860H / DM860 Microstep Stepper Motor Driver

Take precise control of your CNC, automation, or motion-control build with the DM860H / DM860 2-Phase Stepper Motor Driver. Engineered for professional-grade performance, this digital microstep driver is compatible with a wide range of Nema 34 stepper motors and supports both AC and DC power inputs — making it one of the most versatile drivers available for small to medium automation systems.

Made in Mainland China.

Key Features

• Versatile Compatibility: Supports single-ended pulse/direction signal input and works with four-wire, six-wire, and eight-wire two-phase hybrid stepper motors (57mm and 86mm outer diameter, up to 7.2A).
• Ultra-Fine Microstepping: Up to 25,600 steps/rev across 15 adjustable subdivision levels — choose from 2/4/8/16/32/64/128/5/10/20/25/40/50/100/125 subdivisions for smooth, precise motion.
• Wide Voltage Input: Operates on DC 24–110V or AC 18–80V, with built-in reverse-connection protection for safe, flexible power supply integration.
• High Output Current: Adjustable output current from 2.0A to 7.2A with a maximum pulse frequency of 200 KHz for reliable, high-speed operation.
• Comprehensive Protection: Overheat, overcurrent, and undervoltage lockout protection keep your system safe. Optocoupler-isolated signal input delivers strong anti-interference capability in demanding environments.
• Efficient Heat Dissipation: Large-volume heat sink design ensures sustained operation. The DM860H variant also includes a cooling fan for enhanced thermal management in high-demand applications.
• Universal Signal Range: Accepts external signals of 3.3–24V without the need for series resistors, streamlining setup.

Specifications

• Model: DM860 (no fan) / DM860H (with fan)
• Phase: 2-Phase Hybrid Digital
• Input Voltage: DC 24–110V / AC 18–80V
• Output Current: 2.0A – 7.2A
• Max Pulse Frequency: 200 KHz
• Subdivision Levels: 15 adjustable levels (up to 25,600 steps/rev)
• Compatible Motor: Nema 34 (57mm, 86mm two-phase hybrid stepper motors)
• Color: Black
• Dimensions: 150 × 95 × 50 mm / 5.91 × 3.74 × 1.97 in
• Origin: Made in Mainland China

What's in the Box

• DM860: 1 × DM860 Stepper Motor Driver (without fan)
• DM860H: 1 × DM860H Stepper Motor Driver (with fan)

Ideal Applications

This stepper driver is purpose-built for:

• CNC Machine Tools
• Engraving & Marking Machines
• Laser Cutting Machines
• Phototypesetting & Plotters
• Automated Handling Devices
• Small to Medium Industrial Automation Equipment

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Note: Due to monitor and lighting differences, actual product color may vary slightly from images. Please allow ±1–2 cm measurement deviation due to manual measurement.

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Frequently Asked Questions

Q: What stepper motors is the DM860H / DM860 driver compatible with?

A: The DM860H and DM860 stepper motor drivers are compatible with two-phase hybrid stepper motors with 57mm and 86mm outer diameters, including four-wire, six-wire, and eight-wire configurations rated at 7.2A or below. They are specifically well-suited for Nema 34 stepper motors used in CNC and automation applications.

Q: What is the difference between the DM860 and DM860H models?

A: The main difference is cooling: the DM860 comes without a fan and relies on its large heat sink for thermal management, while the DM860H includes a built-in cooling fan for improved heat dissipation in higher-demand or continuous-operation environments.

Q: Can the DM860H stepper driver run on AC power?

A: Yes. Both the DM860 and DM860H support a wide input voltage range — AC 18–80V or DC 24–110V — with built-in reverse-connection protection, making them compatible with a wide variety of power supplies commonly used in CNC and automation setups.

Q: How many microstepping subdivision levels does this driver support?

A: This microstep driver offers 15 adjustable subdivision levels, ranging up to 25,600 steps per revolution. Available subdivisions include 2, 4, 8, 16, 32, 64, 128, 5, 10, 20, 25, 40, 50, 100, and 125 — providing fine control for smooth and precise motor motion.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.