PA-R-250-9 rotary actuation product

The PA-R-250-9 is an industrial rotary servo actuator from Pegasus Actuators GmbH, a brushless rotary actuator with a digital positioning controller for demanding environments. It was developed as a high-output version of the maker's PA-R-250-8, using a high-output brushless DC motor and an adjusted gear train and case.

The actuator turns a command signal into a defined angular position of its output shaft. Continuous (rated) torque is 400 Ncm, and peak torque is above 700 Ncm. No-load speed is 185 degrees per second at 24 VDC, and speed at rated torque is 135 degrees per second. Gear train backlash is below 0.5 degrees. The standard travel angle is plus or minus 90 degrees, with an optional plus or minus 170 degrees, and the mechanical sensor travel is 360 degrees with no end stops. Peak current for short periods is 3,300 mA, and continuous stall current is limited to 900 mA. A PA-SC slip clutch on the output shaft provides overload protection.

The motor is a neodymium-magnet BLDC type running on a double ball-raced arrangement. The gear train uses hardened steel spur gears with six ball races. The case is CNC-machined aluminium, bead blasted and anodized, rated IP67 for water and dust, with four-point horizontal and vertical fixation. The unit weighs 335 g. Permitted loads on the output shaft are below 100 N axial and below 300 N lateral. The operating temperature range is -40 to +70 degrees C.

For integration, the supply voltage is 18 to 32 V, with 24 V typical, and the standby current is 40 mA. The standard input is a TTL-level PWM signal with a pulse length of 1.0 to 2.0 ms. Options are a differential PWM signal over an RS485 transceiver, an RS485 data protocol and CANopen CiA 402. Position feedback is an analog differential signal of 0 to 5 V, at 27.78 mV per degree. Connector choices are a 9-pin D-Sub or a Glenair Mighty Mouse Series 801 7-pin connector, with or without a pigtail cable. Pegasus lists vibration testing to EN 60068-2-6 and shock testing to IEC 68-2-32.

The actuator is used where a compact, rugged rotary drive is needed, such as flight control surfaces, valves and other mechanisms on industrial and unmanned platforms.