Product Description:

The PMB31D-10216-02 brushless servomotor is manufactured by Pacific Scientific within the PMB Brushless Servomotors series. It is intended for integration into industrial automation axes that demand closed-loop speed and position control. When driven by a compatible amplifier, the unit supplies regulated torque to indexing tables, conveyors, and lightweight gantry systems, helping maintain repeatable motion and stable cycle timing during continuous operation.

The electrical interface is provided through flying leads with MS connectors, allowing quick mate-and-lock hookup while maintaining shield continuity at the connection point. The physical envelope follows the NEMA Size 34 frame standard, so existing brackets and gearheads designed for that footprint can often be used without redrilling or adapter plates. Rotor position is reported by a 4096 ppr incremental sensor, giving 12-bit resolution per revolution for fine commutation and servo-loop feedback. Continuous load capability is limited by a nominal stall current of 5.4 ARMS at 240 Vac, which helps determine amplifier sizing and conductor selection. Commutation data is carried on the feedback line because the motor uses a digital encoder with commutation, eliminating separate Hall devices and reducing the number of signal elements that must be routed with the motor cable.

Thermal monitoring is handled by a built-in PTC Thermistor, enabling the drive to reduce current before winding temperature rises beyond a safe operating range. The shaft exits the front flange as a round shaft, which suits clamp-style or set-screw couplings used in low-backlash stages and other compact transmission arrangements. Electromagnetic output scales with stack height, and this model uses a stack length multiple of 1, which keeps the package short and helps lower rotor inertia for quicker acceleration and deceleration.