Product Description:

The PMB31D-10200-03 is a brushless servomotor manufactured by Pacific Scientific. It serves as a compact rotary actuator that couples directly to mechanical loads. This provides repeatable speed and position control for automated pick-and-place arms, index tables, and small conveyor drives in compact motion systems.

The motor is built on a NEMA Size 34 frame, so its 3.4-inch square face mates with standard gearboxes and mounting brackets used in light-to-medium duty machinery where standard face dimensions simplify mounting. A nominal stall current of 5.4 ARMS at 240 VAC indicates the continuous phase current the drive must supply while the rotor is locked but energized, which helps size the drive and cabling. Rotor position is returned through a resolver, an analog sensor that supports high-temperature operation and provides shaft angle information after power loss. Power, signal, and ground conductors exit the housing as flying leads with MS connectors, allowing connection to existing harnesses without opening the motor housing during installation.

The motor includes a shaft seal and PTC thermistor; the seal helps limit the ingress of oil or dust along the output shaft, and the thermistor provides a temperature-dependent resistance that can be monitored for overload protection before excessive winding temperature develops. It has a round shaft, which allows coupling with set-screw hubs or clamp collars when keyed engagement is not required in properly aligned assemblies. A stack length multiple of 1 indicates a single magnetic stack inside the stator, which sets this model apart from longer models in the same platform. Within the PMB Brushless Servomotors line, it shares common winding resistance, inductance, and feedback pin assignments with related models that use the same platform architecture.