Description
Model Series: MERCURY STEP series
Technical Specifications:
- Input Voltage: 24–80 VDC
- Output Current: 3.5 A per phase (continuous)
- Microstepping: Up to 1/8 step (3 selectable resolutions: full, half, 1/8)
- Pulse Input Frequency: Up to 100 kHz
- Control Inputs: Step, Direction, Enable
- Protection: Overcurrent shutdown, thermal shutdown
Functional Features:
- Pulse-and-direction interface for standard motion control
- Automatic current decay mode selection (fast decay / slow decay)
- Built-in freewheeling diodes for inductive load protection
- Opto-isolated inputs for noise immunity
Performance Parameters:
- Peak Phase Current: 5.0 A
- Logic Supply Voltage: 5 VDC (internal regulated)
- Operating Temperature Range: 0°C to +50°C
- Dimensions: Approximately 3.4 in × 2.8 in × 1.2 in (86 mm × 71 mm × 30 mm)
Material Composition: Fiberglass PCB, aluminum heat sink base, epoxy-encapsulated power components
Structural Features: PCB-mounted module with screw terminal blocks for motor and power connections; DIP switches for microstepping and current settings
Working Principle: Receives step pulses on the STEP input, advances the motor by one microstep per pulse. The DIRECTION input sets rotation direction. The driver uses a chopper current control circuit to regulate phase current to the set value regardless of supply voltage variation.
Advantages:
- Compact form factor with high current capability
- Opto-isolated inputs eliminate ground loop issues
- Robust thermal and overcurrent protection
Applicable Industries: CNC machines, pick-and-place equipment, lab automation, small robotics, 3D printers (industrial grade)
Installation Requirements:
- Mount on a metal chassis or DIN rail with adequate airflow
- Use shielded cable for step/direction signals
- Ensure power supply can deliver peak current (5 A per phase)
Usage Notes:
- Set microstepping DIP switches before powering on
- Do not exceed 80 VDC input voltage
- Verify motor wiring (4-wire or 6-wire bipolar) matches driver configuration
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