Product Description:

The PMB31B-10216-00 is a brushless servomotor built by Pacific Scientific and placed within the PMB Brushless Servomotors series. It is intended for closed-loop motion axes in industrial automation where precise speed and position control are required. The motor responds well to rapid command changes, making it suitable for indexing tables, feeders, and other automated mechanisms that need repeatable motion. Because the feedback device is integrated into the motor, the drive can monitor shaft position and speed within the same actuator package.

This motor uses a frame coded as NEMA size 34, so its mounting pattern aligns with standardized 3.4-inch square flanges. Position feedback is supplied by a digital encoder with 4096 ppr, providing 12-bit resolution for the drive servo loop. Continuous stall duty at 240 VAC requires only 2.7 ARMS, which helps keep current demand moderate for matching amplifiers. Rotor commutation signals are generated by the integrated digital encoder with commutation, eliminating Hall devices and reducing wiring count. Power and feedback conductors exit the housing as flying leads with MS connectors, giving the motor a pre-terminated connection style that supports orderly cable routing.

Mechanical coupling is handled by a round shaft, allowing set-screw or clamp collars to transmit torque without keyway machining. The electromagnetic package uses a stack length multiple of 1, which is the shortest stator core available in this series and helps keep inertia low for faster acceleration and deceleration. This build is supplied as a Standard Motor, so the winding, feedback arrangement, and connectors follow the usual configuration for this series. This format works well where mounting space is limited and the cable bundle must turn away from nearby machine members.