Autonics MD5-HF28 5-Phase 2.8A 100-220V AC Stepping Motor Driver
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The Autonics MD5-HF28 is a five-phase micro-stepping motor controller designed for direct control of five-phase hybrid stepper motors. Rated for 100–220V AC input at 50/60Hz with 2.8A maximum phase current, this new unit features a finned aluminum heatsink for thermal dissipation and includes green 3-pin terminal blocks for motor and control signal connections. The device incorporates control inputs for clockwise/counterclockwise rotation, hold/off function, divisor selection, and zero-output command, with status indication via Power, Alarm, Run, and Test LED indicators. Operating specifications include support for step division (1×, 2×, 4×, 8× configurable via MS1/MS2 selector), CW/CCW directional control, and manual step pulse input via the TEST button for diagnostic purposes. This controller is commonly used in precision positioning, light industrial automation, CNC retrofits, and micro-motion applications requiring reliable five-phase stepper operation.
Product Specifications
| Model | MD5-HF28 |
| Motor Type | 5-phase stepper motor |
| Input Voltage | 100–220V AC |
| Input Frequency | 50/60Hz |
| Maximum Phase Current | 2.8A per phase |
| Number of Phases | 5 |
| Control Inputs | CW, CCW, HOLD/OFF, DIV/SEL, ZERO/OUT |
| Step Division | 1×, 2×, 4×, 8× (selectable via MS1/MS2) |
| Status Indicators | Power (green LED), Alarm (red LED), Run, Test |
| Terminal Blocks | 3-pin green screw terminals (2 terminals) |
| Heatsink Material | Aluminum with finned design |
| Manufacturer | Autonics |
| Country of Manufacture | Korea |
| Condition | New |
| Certifications | CE, UL |