Product Description:

The PMB33E-20216-03 is manufactured by Pacific Scientific as part of the PMB Brushless Servomotors series. This brushless servomotor is designed for precision positioning and speed regulation in industrial automation, where tight motion control and repeatable performance are required on packaging equipment, pick-and-place heads, and similar axes. Its brushless design supports smooth response during repeated starts, stops, and direction changes on coordinated motion axes. This makes the motor suitable for indexing, transfer, and synchronized feed tasks that depend on stable velocity control and accurate stopping.

The motor is built on a NEMA Size 34 frame, providing a standardized mounting pattern that simplifies interchange with other size-34 devices. At 240 VAC, the winding can sustain a nominal stall current of 7.4 ARMS, which indicates the continuous current level before thermal rise must be considered. Rotor position feedback is supplied by a digital encoder with commutation; its incremental tracks deliver 4096 ppr of resolution to the drive, enabling fine velocity and position loops. Because commutation signals are included in the feedback device, the drive can align motor phase excitation with rotor position throughout the speed range. Power and feedback conductors exit the housing through flying leads with MS connectors, allowing quick mating to cabinet harnesses without additional breakout boards. The motor is intended for use with drives that share compatible phasing and thermal characteristics.

The mechanical interface includes a square key on the output shaft so torque is transmitted directly to pulleys or couplings without relying on friction alone. A shaft seal helps limit the entry of contaminants at the shaft interface, and the stator windings are monitored by an integrated PTC thermistor that signals the drive if internal temperature rises above its calibrated limit. This thermal feedback supports protective drive response during demanding duty cycles. Winding length follows a stack length multiple of 3, increasing the active iron and copper to raise continuous torque while keeping the frame size unchanged.