PMB21D-10116-00 Pacific Scientific
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The Pacific Scientific PMB21D-10116-00 is a standard brushless servomotor from the PMB Brushless Servomotors series. It features a NEMA Size 23 frame, a digital encoder with commutation, and a 4096 pulse per revolution resolution. The motor has flying leads with AMP connectors and offers a nominal stall current of 5.4 ARMS at 240Vac.
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Product Description:
The PMB21D-10116-00 is a brushless servomotor produced by Pacific Scientific within the PMB Brushless Servomotors series. Designed for closed-loop industrial automation, it converts electrical power into controlled rotary motion for positioning axes, pick-and-place heads, or tension-control rolls. This permanent-magnet motor pairs with a matched digital drive to deliver repeatable torque while eliminating brush wear, making it suitable for continuous-duty environments such as electronics assembly lines and packaging machinery. Its conductors exit on flying leads, allowing integration into new builds or existing machines.
The motor is fitted with flying leads with AMP connectors, a layout that allows direct splice or crimp termination while preserving strain relief through the molded plug. The frame conforms to NEMA Size 23, so the 2.25-inch square flange aligns with compatible gearheads and mounting brackets. With a 240 V AC supply, the windings reach a nominal stall current of 5.4 A RMS, which is the continuous current a matched drive must sustain for maximum static torque without overheating. Position information comes from an optical encoder that delivers a resolution of 4096 PPR. This device also serves as the commutation sensor and operates as a digital encoder with commutation, providing U, V, and W Hall tracks that allow the controller to energize the stator phases throughout each electrical cycle.
The mechanical output uses a round shaft, so torque is transferred through press-fit couplings or set-screw hubs without keyways. The magnetic stack has a length multiple of 1, giving the motor the shortest active core in the series and minimizing inertia for rapid acceleration. The unit is classified as a standard motor, indicating that it uses the standard windings, bearings, and seals without custom options. Its compact active core supports responsive motion where an axis must change speed or direction frequently. The standard configuration also provides consistent mounting dimensions for equipment that uses other compatible PMB servomotors.
