Product Description:

The PMM-UA-4303-1 pulse-motor driver is produced by Sanyo Denki within the PM Drivers series. Designed for installation inside control cabinets, it receives clock and direction signals from PLC or microcontroller modules and modulates current through stepper-motor windings. This function delivers repeatable angular increments, making the unit suitable for pick-and-place arms, labeling stations, and other positioning equipment in automated production cells.

It uses a unipolar drive topology and energizes two-phase windings at a continuous rating of 2 A per phase. The control electronics accept a pulse stream of up to 20 kilopulses per second, so indexing speeds remain consistent at higher mechanical rates. This frequency ceiling aligns with the electrical time constant of medium NEMA 23 and NEMA 34 hybrid stepper motors, helping to prevent missed pulses at higher rotor speeds. Power is supplied by a single-phase 100 VAC mains connection; the internal circuitry presents an input resistance of 150 Ω and may draw as much as 3 A of source current during acceleration. The selectable resolution includes a half-step increment of 0.9° per pulse, providing smoother motion than full-step drive modes and reducing audible resonance.

Protective monitoring is provided through a photocoupler open-collector alarm output that can sink a maximum of 5 mA at up to 30 VDC, enabling electrically isolated fault reporting. In full-step mode, the connected motor advances 1.8° per pulse, offering deterministic positioning where coarse indexing is sufficient. The driver withstands vibration up to 4.9 m/s² and has a mass of 0.6 kg, so it places minimal load on machine frames. Electrical protection includes a minimum insulation resistance of 10 MΩ and a withstand voltage of 1000 VAC between the power lines and chassis.