PA-R-135-6 rotary servo actuator

The PA-R-135-6 is a programmable rotary servo actuator from Pegasus Actuators, intended for professional use in robotics, unmanned vehicles and industrial positioning tasks. It combines a DC motor with a neodymium magnet, a gear train, a digital controller board and a contactless angle sensor in a single sealed housing.

The key figures describe what the actuator can do at the output shaft. Continuous torque is 45 Ncm and peak torque exceeds 90 Ncm, so the continuous value should be used for sizing a steady load and the peak value only for short moves. No-load speed is 145 °/s at 12 V DC, which sets how fast a control surface or flap can travel when the load is small. The standard travel is plus or minus 90 degrees, measured with the contactless PA-ME angle sensor, and other angles are available on request. Mass is 85 g.

The gear train uses hardened steel spur gears with a higher reduction ratio than the PA-R-135-4, and the output shaft has overload protection. The housing is aluminium with IP67 protection against dust and water, with a three-point fixation that allows mounting in horizontal and vertical orientations. These features suit installations exposed to vibration, moisture and dust.

For integration, the actuator operates from a 6, 12 or 24 V DC supply. The standard command interface is a PWM signal at TTL level, with a differential PWM version through an RS-485 transceiver and an RS-485 data protocol as options. The sensor gives differential analog position feedback, which allows a flight controller or external controller to read the shaft angle. Connections are made with Glenair Series 881 connectors or Tyco MTA100 connectors on pigtail units without a connector.

Typical applications are control surface actuation on small unmanned aircraft, gimbal and payload positioning, valve and throttle actuation, and other tasks where a light, sealed and programmable rotary actuator replaces a hobby servo.