Product Description:

Pacific Scientific manufactured the PMB33F-20116-02, a brushless servomotor built for the PMB Brushless Servomotors series. Within an automation cell, the motor supplies precise, continuous torque so that position loops in servo drives can hold or move a load along a commanded profile with accurate motion control. The brushless design supports smooth response during repeated starts, stops, and reversals, which is useful in indexing, feeding, and positioning applications. Mechanical power density is tied to the lamination stack, and this unit uses a stack length multiple of 3, balancing stall torque against rotor inertia for mid-range load profiles.

The frame follows the NEMA Size 34 mounting pattern, letting it bolt directly to gearboxes or machinery already laid out for this standardized footprint. Feedback comes from an integral encoder that delivers 4096 ppr, providing fine angular resolution for tight velocity and position regulation. Commutation data is embedded in the same device as a Digital Encoder with commutation, which removes the need for separate Hall sensors. Because feedback and commutation share one device, the drive receives both rotor position and switching information from a single source. During locked-rotor conditions at 240 VAC, the motor can draw up to 11.0 ARMS, a current value that helps size drives and cabling for worst-case thermal loading.

The output shaft is machined with a Square Key, allowing torque transfer into couplings or pulleys without slip while still permitting quick removal for maintenance. To guard against overheating, the windings include a PTC Thermistor that changes resistance sharply at a preset temperature so the drive can trigger a controlled shutdown. The thermal sensor gives the control system an early warning before sustained heating can damage insulation. Field wiring leaves the housing as Flying leads with AMP connectors, and these pre-terminated conductors reduce panel assembly time while helping maintain proper shield termination for noise control.