8.4A 2-Phase Stepper Drive DC/AC

8.4A 2-Phase Stepper Drive DC/AC with Dual Supply Input

The 2DM860H is an 8.4A 2-Phase Stepper Drive DC/AC unit rated for up to 8.4 A of output current. It accepts either 24-110 VDC or 18-80 VAC input, letting integrators draw power from a shared DC bus or line AC as the machine layout dictates. This flexibility makes it a practical choice for mixed-voltage plants and retrofit projects where the existing supply rail is already defined.

Control Mode

The drive runs on Pulse/Dir and CW/CCW pulse inputs, connecting directly to standard step controllers. Open-loop operation removes encoder feedback and tuning, so each axis positions by commanded steps with a simple wire count. That simplicity lowers the barrier for service technicians who maintain the equipment.

Protection and Smoothing

Overcurrent, overvoltage, and undervoltage protection handle supply and load faults. The output stage is tuned for low noise and vibration, giving two-phase stepper motion that is quiet and stable over varied cycles, from slow indexing to rapid transfer moves.

Key Specifications

• Output current: max 8.4 A
• Supply voltage: 24-110 VDC; 18-80 VAC
• Control modes: Pulse/Dir, CW/CCW pulse
• Protection: overcurrent, overvoltage, undervoltage
• Operation: open-loop, low noise and vibration

Applications

It serves Industrial Automation, Packaging Machinery, Compact CNC Equipment, Robotics, Automated Handling Mechanisms, Textile Machinery, Printing Machinery, and Food Processing. The dual-supply design is particularly useful when upgrading legacy machines to a common DC bus while keeping older AC-fed stations running.

System Design

Pair with a 2-phase motor whose phase current fits within 8.4 A. The dual DC/AC input enables one drive model to serve machines powered from different supply rails, which simplifies stocking and reduces downtime risk. When wiring the DC input, respect polarity and keep bus capacitance within the drive’s rating. For help selecting the right motor-drive combination, the Lyenwsin distributor team offers technical support.