2DM86C Stepper motor driver Assay
Key Specifications & Features

• Operating Voltage: Accepts 18–80 VAC or 24–110 VDC power supplies. 
• Output Current: Adjustable peak current from 2.4A to 7.2A (or up to 8.2A/8.4A depending on specific sub-variant like DMA860S/2DM860H) via onboard DIP switches.
• Microstepping: Configurable resolutions ranging from 400 up to 51,200 steps/revolution via DIP switches. 
• Control Signals: Optically isolated differential inputs supporting PUL/DIR (Step and Direction) or CW/CCW (double pulse) modes at up to 200–250 kHz max pulse frequency. 
• Advanced DSP Technology: Features anti-resonance smoothing, automatic idle-current reduction (halving current when stationary to reduce motor heating), and parameter self-tuning for matched motors.
• Protections: Built-in safeguards against over-voltage, under-voltage, over-current, and short circuits. 

Typical Applications

• CNC routers and milling machines
• 3D printers and laser cutters
• Automated industrial assembly, packaging, and labeling equipment 

Could you specify what motor model or control board (e.g., Arduino, PLC) you are pairing with this driver so I can give you exact wiring configurations or DIP switch settings?