Product Description:

The M22NRXA-JDF-NS-00 is a two-phase stepper motor built by Pacific Scientific for the POWERMAX II M Motors series. It converts digital pulse trains from an external drive into precise shaft increments. This makes it suitable for indexing tables, pick-and-place heads, and other motion axes that need open-loop positional control in automated machinery.

Electrically, the motor carries two windings connected in parallel for a 6.5 A DC rated phase current and a low coil resistance of 0.21 ohms, a combination that permits high torque at moderate supply voltage. The inductance is 0.60 mH, so current rises quickly and supports rapid step rates without loss of synchronism. With two phases and two magnetic stacks, the rotor advances 1.8 degrees per command pulse, yielding 200 full steps per revolution with a step accuracy of ±1.5 %. The available static torque reaches 229 oz-in, helped by the low-inertia rotor. Winding code A is supplied through a standard lead-wire connection, and the model is delivered without feedback devices, so position is determined solely by commanded pulse count. The operating envelope spans -20 °C to +40 °C, covering typical cabinet environments.

Mechanically, the motor fits the NEMA 23 frame standard with a body length of 3.10 in. It mounts on a NEMA face with a 2.625 in bolt circle and 0.200 in hole diameter, accessed through a receptacle-style connection block. The double-ended shaft is ground to a 0.2500 in diameter, extends 0.81 in on each side, and includes a flat for secure coupler engagement. Insulation is Class B (130 °C) with a dielectric strength of 340 Vdc and a leakage path resistance of 100 Megohms, providing margin against thermal and electrical stress. The unit uses the NEMA mounting style for straightforward installation in standard machine layouts.