Product Description:

The P21NRXC-LSS-NS-06 is a two-phase hybrid stepper motor manufactured by Pacific Scientific for the POWERMAX II P Motors series. It serves as a positioning element in industrial automation and receives pulse commands from a drive. The shaft turns in precise increments, allowing machinery such as pick-and-place heads, small conveyors, or indexing stations to reach commanded angles without closed-loop feedback. This open-loop arrangement is common in compact automation equipment where repeatable indexing is more important than onboard feedback hardware.

The motor advances by 1.8° per input pulse, which yields 200 discrete steps for each full revolution and provides step accuracy of ±1.5%. With a single stack inside the NEMA 23 frame, it delivers a holding torque of 0.82 Nm when both windings are energized in bipolar parallel mode. That torque is produced while the coils draw a rated phase current of 3.5 A in continuous operation. Coil design C has an electrical inductance of 2.3 mH, which limits current rise time, and a winding resistance of 1.06 Ω, which sets copper losses at standstill. The motor uses a standard rotor design, and the enclosure carries IP23 protection, so it can operate in lightly ventilated cabinets where falling water and heavy dust are absent.

For unpowered axis restraint, the detent torque is 0.03 Nm; this magnetic cogging resists small disturbances when the drive is off. Continuous service is supported from –20 °C to +40 °C, while the windings comply with Class B insulation that allows 130 °C internal temperatures, a 95 °C maximum surface temperature, and 340 Vdc dielectric capability. Insulation resistance remains at least 100 MΩ to protect against leakage. Installation uses the NEMA mounting pattern, and the connection style uses regular leadwire routed to a receptacle. Phase sequencing is handled by an external controller, and the motor does not include an integral encoder.