Product Description:

The PMB31B-10114-02 belongs to the PMB Brushless Servomotors series produced by Pacific Scientific. As a brushless servomotor, it supplies controlled torque and velocity for positioning tables, pick-and-place heads, or indexing axes in automated equipment. By combining permanent-magnet excitation with electronic commutation, the unit eliminates brush wear and supports maintenance-free operation in continuous-duty industrial motion systems.

This motor is factory-wired with flying leads with AMP connectors, allowing direct harness integration without additional terminal blocks. Feedback is supplied by a digital encoder that delivers 2048 ppr, enabling fine position interpolation when paired with high-resolution drives. Its mechanical interface follows the NEMA Size 34 mounting pattern, so it can replace or retrofit standard stepper or servo frames without adapter plates. Under locked-rotor conditions on a 240 VAC bus, the winding draws a nominal stall current of 2.7 ARMS, a value used to set peak current limits and thermal foldback thresholds. The internal sensing element is a digital encoder with commutation tracks, which transmits incremental position data and three Hall-level commutation signals so the drive can energize the correct phase sequence from standstill through top speed.

Thermal protection is provided by a PTC thermistor embedded in the stator, allowing the drive to reduce output or shut down before insulation temperature becomes excessive. A round shaft simplifies coupling with collets, pulleys, or clamp hubs when backlash must be minimized. The stack length code is 1, which keeps the motor compact and favors lower inertia for fast acceleration. The housing dimensions and encoder arrangement follow the PMB series format, which helps the motor fit applications that use this platform.