Product Description:

The PMM-MD-23120-10 is a compact driver module manufactured by Sanyo Denki for the PM Drivers series. It is intended to energize two-phase stepper motors used in positioning tables, labeling heads, or light pick-and-place fixtures where open-loop motion is sufficient. By converting command pulses from a controller into timed phase currents, the unit generates precise incremental rotation without requiring feedback devices.

This driver employs a unipolar output stage, so each motor coil is excited through center-tapped windings that simplify current switching and limit voltage stress on the transistors. Command signals arrive through a pulse interface, and an internal input resistance of 330 Ω establishes the proper sink current for typical 5 V logic sources. The circuitry accepts pulse rates up to 20 kpulses/s, allowing motor speeds in the low thousands of revolutions per minute when the mechanical load permits. Motor windings can be driven continuously at 2 A per phase, which is the maximum current the driver can sustain without exceeding its thermal limit. The design supports two-phase excitation and momentarily draws up to 3 A of source current during simultaneous phase energization. A minimum insulation resistance of 10 MΩ between the power and signal sections reduces leakage paths that could disturb low-level control signals.

The supply bus accepts 24 VDC or 36 VDC with a ±10% tolerance, matching common machine-control power rails and eliminating the need for dedicated converters. The module has a width of 90 mm, a depth of 36 mm, and a height of 70 mm, allowing it to fit in narrow panel spaces; mounting holes with a diameter of 4 mm facilitate attachment to DIN plates or bulkheads. The enclosure has a mass of 0.6 kg, which reduces stress on lightweight mounting surfaces, while its vibration limit of 4.9 m/s² supports operation in industrial environments. The electrical sections have a dielectric strength of 500 VAC for one minute, providing insulation between isolated circuits.