Product Description:

The M22NRXD-LSS-M1-02 is a two-phase stepper motor built by Pacific Scientific for the POWERMAX II M Motors series. As a NEMA-style positioning device, it converts digital pulse trains from an indexer or PLC into fixed angular increments so that conveyors, actuators, or small gantry axes can be indexed without feedback hardware. An encoder mounting provision is included for applications that may later require closed-loop position verification. The regular lead wire connection style simplifies wiring inside machine cabinets and provides direct access to the motor phases.

The motor follows the NEMA 23 outline, with a body width of 57.15 mm, a pilot diameter of 38.1 mm, and mounting holes arranged on a 66.67 mm bolt circle. The mounting holes have diameters of 5.08 mm, allowing direct attachment to standard flanges. Each command pulse produces a 1.8-degree step, resulting in 200 discrete positions per revolution, while step accuracy remains within ±1.5%. A laminated, two-stack rotor provides a holding torque of 1.68 N·m, allowing the energized motor to hold a stationary load. The D-type winding draws a parallel-connected phase current of 2.5 A, which guides drive selection and affects the motor’s midrange resonance behavior.

When the windings are unenergized, the rotor resists movement with a detent torque of 0.12 N·m, which can help retain light fixtures during power cycles. Electrical response is influenced by a phase inductance of 5 mH and a phase resistance of 1.22 Ω; these values establish the electrical time constant and affect how quickly phase current rises during high-speed movement. Class B insulation tolerates winding temperatures up to 130 °C. An insulation resistance of 100 MΩ and an insulation voltage rating of 340 VDC provide dielectric separation between conductive components. The permitted operating temperature range is -20 °C to +40 °C, allowing the motor to operate in most factory environments without auxiliary heating or cooling.