PMB31B-10116-02 Pacific Scientific
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
The Pacific Scientific PMB31B-10116-02 is a brushless servomotor from the PMB Brushless Servomotors series, featuring a NEMA Size 34 motor with a round shaft design. It includes a digital encoder with commutation and a resolution of 4096 ppr, and connects using flying leads with AMP connectors. This motor is equipped with a PTC thermistor, has a nominal stall current of 2.7 ARMS at 240 VAC max, and a stack length multiple of 1.
Internal Product Review
The PMB31B-10116-02 is a well-executed Pacific Scientific PMB Series brushless servomotor with a digital encoder and commutation support. Flying leads with AMP connectors simplify integration, and 4096 ppr encoder resolution supports precise feedback for accurate motion control.
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Product Description:
The PMB31B-10116-02 brushless servomotor is manufactured by Pacific Scientific and belongs to the PMB Brushless Servomotors series. It serves as a rotary actuator for industrial automation, translating servo drive commands into accurate shaft movement on pick-and-place modules, labeling stations, and gantry axes where repeatable positioning, stable velocity profiles, and smooth starts and stops are required during continuous production. The frame conforms to NEMA Size 34, with a 3.4-inch square mounting face that aligns with standard gearboxes and slide brackets.
At 240 VAC, the motor can sustain a nominal stall current of 2.7 ARMS, which helps size the power stage without exceeding thermal limits during locked-rotor holding conditions. Position feedback is generated by a 4096 ppr incremental scale, allowing controllers to resolve angular motion to fine increments in high-speed indexing tasks while maintaining consistent feedback during rapid speed changes. The onboard sensor is a digital encoder with commutation, so the same feedback stream supplies both rotor position and three-phase commutation signals without requiring separate Hall devices. Power and signal conductors exit as flying leads with AMP connectors, enabling quick connection while keeping the housing closed and avoiding a separate terminal-box assembly.
A built-in PTC thermistor changes resistance with winding temperature, giving the drive a direct signal to reduce current before insulation limits are exceeded and helping protect the winding during repeated high-load cycles. The stainless-steel output is machined with a round shaft, which is useful when keyed or splined couplings are unnecessary and low runout is preferred. Magnetic flux density is reflected by the stack length multiple of 1, which keeps inertia low for quick acceleration and fast response to changing commands.
