Product Description:

The P21NSXS-LSS-SS-03 is a hybrid stepper motor produced by Pacific Scientific for the POWERMAX II P Motors series. In automated pick-and-place units, indexing tables, and small conveyor drives, it converts pulse commands from a stepper amplifier into controlled increments of shaft rotation for open-loop positioning. Because the motor is used in open-loop systems, the controller issues step pulses rather than reading a feedback device, which keeps the motion chain simple. This operating method gives the motor predictable movement in applications that need repeatable indexing and straightforward drive control.

Motion granularity is set by a 1.8° step angle, so the shaft moves through 200 steps per revolution. Its bipolar windings use a 2-phase design that balances torque production with simple drive electronics. The motor has ±1.5% step accuracy, which helps keep position deviation low across repeated cycles. The rotor uses a Neodymium-Iron-Boron magnet ring to support strong flux density and solid detent torque. The motor uses a single stator stack, which reduces overall length while maintaining rated dynamic torque. Insulation resistance is 100 Megohms, and the insulation system withstands 340 Vdc between the windings and frame during dielectric testing.

The housing follows a NEMA 23 frame with flats measuring 2.25 in across, and the octagonal body helps the motor fit tight mounting spaces. Radial loads are supported by a 30 mm bearing that keeps the shaft centered when pulleys or couplings are attached. Ambient operation is allowed from -20 °C to +40 °C, and a Class B 130 °C insulation system provides thermal margin when winding temperatures rise during use. The receptacle connector, NEMA mounting face, and single-piece standard construction simplify installation in modular machinery. This layout is useful where enclosure space is limited and cable access must remain straightforward.