Product Description:

The P21NSXC-LSS-NS-14 is a hybrid stepper motor manufactured by Pacific Scientific within the POWERMAX II P Motors series. It converts pulse trains from a stepper drive into controlled shaft rotation, providing economical open-loop positioning for small conveyors, fluid metering pumps, and pick-and-place axes in automated equipment. Because no feedback device is fitted, motion control is entirely open loop. That makes the motor suitable for indexing, dosing, and transfer tasks where commanded step counts are expected to produce repeatable shaft movement.

It incorporates two electrical phases, giving the rotor a basic step of 1.8 degrees and therefore 200 discrete positions per revolution. Step accuracy remains within ±1.5%, which keeps positional error low without an encoder. The single-stack rotor and type C winding are tuned for parallel connection where the rated current is 3.5 A and phase resistance is 0.53 Ω; under this condition, the motor develops a holding torque of 0.82 Nm while detent torque is limited to 0.03 Nm to reduce cogging when de-energized. Electrical dynamics are set by a 2.3 mH phase inductance, so current can rise quickly at modest bus voltage and support smooth low-speed rotation.

The motor’s physical package follows the NEMA mounting code, and its receptacle connector permits quick connection on the machine frame. The standard construction and standard rotor share the same NEMA 23 envelope, keeping the motor within common dimensions for this series. The housing is rated IP23, which helps protect internal laminations from fingers and falling debris. The winding uses Class B 130 °C insulation with 100 MΩ resistance and withstands 340 Vdc high-potential testing, while continuous service is permitted between −20 °C and +40 °C ambient. The NEMA face mounting pattern also helps the motor fit standardized brackets and couplings used on compact motion assemblies.