Product Description:

The PMB31B-10214-03 is a brushless servo motor from Pacific Scientific that belongs to the PMB Brushless Servomotors series. It provides closed-loop torque and speed control for positioning axes, pick-and-place gantries, and other automated machinery that require consistent dynamic response. By combining permanent-magnet construction with digital feedback, the motor delivers repeatable motion within compact NEMA 34 geometry typical of medium-frame industrial servos.

With a frame classified as NEMA Size 34, the housing aligns with mounting patterns common to mid-range machinery. Under worst-case load, the motor draws a nominal stall current of 2.7 ARMS at 240 VAC, a figure used when sizing power stages and thermal management. Position data are produced by an incremental encoder whose resolution is 2048 ppr, allowing controllers to resolve fractions of a degree during interpolation. The encoder also provides commutation signals through its digital encoder with commutation format, eliminating the need for separate Hall devices. Power and feedback exit the rear of the stator via flying leads with MS connectors, so the user can route cables through flexible conduits without rigid plugs extending the overall length.

The mechanical interface employs a round shaft, suitable for clamp or collet couplings where a keyed profile is unnecessary. A factory-installed shaft seal and PTC thermistor package provides moderate ingress protection and a temperature-sensitive contact for overtemperature shutdown. The internal designation PMB Series Brushless Servomotor identifies the motor type used with compatible Pacific Scientific drive systems. The stack length multiple of 1 indicates the shortest magnetic core available in this frame, favoring lower inertia where rapid acceleration outweighs continuous power.