Product Description:

The PMM-MD-23220-21 is a pulse-controlled motor driver produced by Sanyo Denki for the PM Drivers series. Designed for unipolar stepper motors, the unit converts logic-level command pulses into phased winding currents so indexing tables, labeling heads, and small actuators can be positioned accurately within industrial automation cells. Selectable step angles and microstepping allow the driver to balance speed, resolution, and vibration without requiring a different motor. The compact design is suitable for motion axes that require repeatable incremental movement from a pulse-based controller.

The control section accepts differential or single-ended pulses that are optically isolated through a photocoupler, protecting upstream PLC outputs from electrical interference. It processes pulse trains at up to 20,000 pulses per second, permitting high shaft speeds when paired with fine-pitch lead screws. Main power can be supplied at DC 24 V or 36 V, with a tolerance of ±10%, providing flexibility when the DC bus is shared with sensors or solenoid valves. Phase windings receive a constant current of 1.2 A per phase for controlled motor operation. The driver offers four subdivision settings of 1, 2, 4, or 8 divisions to reduce resonance and improve motion smoothness during acceleration. Command signals can be wired in a two-input pulse-direction mode, which provides separate pulse and direction commands through the control connector.

The driver provides alarm and positioning feedback through an open-collector monitor output rated for 30 V at 5 mA, allowing direct connection to standard sink-type inputs. Internal circuitry withstands a dielectric test of AC 500 V for 1 minute and has an insulation resistance of at least 10 MΩ, supporting reliable operation in electrically noisy control cabinets. The input resistance is 330 Ω, while the power stage has a source current capability of 2 A. The unipolar winding topology limits switching complexity while maintaining controlled phase energization. The aluminum base has two mounting holes with a diameter of 4 mm for secure panel attachment. The assembled mass is 0.18 kg, which minimizes the additional load placed on the mounting panel.