PMB31D-00216-03 Pacific Scientific
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The Pacific Scientific PMB31D-00216-03 is a brushless servomotor from the PMB Brushless Servomotors series, featuring a NEMA Size 34 frame and a flat shaft design. It provides an encoder resolution of 4096 pulses per revolution and a nominal stall current of 5.4 ARMS at 240 Vac. The motor includes flying leads with MS connectors and is equipped with a shaft seal and PTC thermistor for customization.
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Product Description:
Pacific Scientific designed the PMB31D-00216-03 as part of its PMB Brushless Servomotors series. The unit is a permanent-magnet, three-phase servo motor intended for integration with digital drives in automated pick-and-place modules, indexing tables, and other motion axes. By delivering rapid torque response and closed-loop velocity control, the motor converts electrical power into precise mechanical rotation needed for repeatable industrial positioning tasks. Its compact construction allows mounting in confined machine spaces while still meeting the thermal and dynamic demands associated with continuous duty cycles.
The stator and mechanical envelope follow the NEMA Size 34 frame standard, simplifying interchange with other 3.4-inch square motors and easing gearbox alignment. During worst-case stall at 240 VAC, the winding draws 5.4 ARMS, a figure that must be matched by the drive’s continuous current rating to prevent thermal trip. Power and feedback leave the housing through flying leads with MS connectors, so field wiring can be completed without reopening the motor enclosure. Rotor position is reported by a digital encoder that generates 4096 ppr, giving the controller 12-bit incremental resolution for smooth commutation. The motor has a flat shaft end instead of a keyway, allowing torque transmission through set-screw couplings while keeping inertial mismatch low.
For commutation feedback, the motor carries a digital encoder with commutation, enabling the drive to read commutation states and incremental channels from one package. The motor includes a shaft seal and PTC thermistor, so the front bearing is protected against spray while the stator temperature is monitored directly by the drive. Electromagnetic output is scaled by the single-lamination stack identified by the factor 1. It is intended for use with PMA and SCE drives that expect the PMB electrical constant set. This arrangement supports coordinated servo operation where accurate feedback and thermal monitoring are both required.
Frequently Asked Questions about PMB31D-00216-03:
Q: What connector type is provided on the PMB31D-00216-03 servomotor?
A: The PMB31D-00216-03 uses flying leads with MS connectors for its electrical connections, allowing for secure and flexible wiring options.
Q: What is the shaft design of the PMB31D-00216-03 servomotor?
A: This servomotor has a flat shaft design, suitable for direct coupling with compatible mechanical systems.
Q: What type and resolution of encoder is included with the PMB31D-00216-03?
A: The PMB31D-00216-03 features a digital encoder with commutation and provides a resolution of 4096 pulses per revolution.
Q: What customization features are included with the PMB31D-00216-03 servomotor?
A: This model includes a shaft seal and a PTC thermistor for enhanced environmental protection and thermal monitoring.
Q: What is the nominal stall current for the PMB31D-00216-03 at 240Vac?
A: The nominal stall current at 240Vac maximum for the PMB31D-00216-03 is 5.4 ARMS.
