Product Description:

The S22HSNA-RNNM-06 servo motor is produced by Pacific Scientific for the S Brushless Motors series. This 6-pole Neodymium magnet brushless servo unit supplies controlled rotary motion to indexing tables, small conveyors, and pick-and-place mechanisms in automated cells. A size 21 frameless resolver embedded in the rotor provides primary feedback, and the motor-mounted MS connector offers a single quick-release termination interface. This arrangement suits compact motion systems that need accurate feedback and simple cable routing.

With a continuous stall torque of 1.0 Nm, the S22HSNA-RNNM-06 can hold load torque at zero speed without overheating. During acceleration, it develops up to 2.64 Nm of peak torque for short periods, providing the margin needed for rapid indexing moves. The electromagnetic design has a torque constant of 0.3 Nm/ARMS, so each ampere of phase current produces a predictable increase in mechanical output. Phase resistance is 4.2 ohms line to line, and the winding inductance is 5.7 mH; together these values affect current rise time and motor matching with a PWM servo drive. The H-type windings are arranged in a 2-stack lamination, and the motor is supplied without a holding brake, making it suitable for systems that rely on drive torque to maintain position.

The low rotor inertia of 0.064 kg·m² × 10⁻³ supports fast speed changes while minimizing energy drawn from the drive, and the overall mass of 1.9 kg eases installation on lightweight machine frames. Back EMF rises at 0.19 VRMS/rad/sec, allowing the controller to estimate velocity accurately across the operating range. The frame conforms to NEMA 23 dimensions, so it fits standard mounting patterns. There is no shaft seal, no secondary feedback device, and no integral brake, so environmental protection and power-off holding must be provided externally. The motor’s stack design leaves room for airflow around the housing, and the absence of additional seals helps dissipate heat generated by the H windings.