Two Position Damper Actuator w/ Spring Return (175 lb-in)

MS4120, MS7520, MS8120 Spring Return Direct Coupled Actuators (DCA) are used within heating, ventilating, and air-conditioning (HVAC) systems. They can drive a variety of quarter-turn, final control elements requiring spring return fail-safe operation. Features Brushless DC submotor with electronic stall protection for floating/modulating models. Brush DC submotor with electronic stall protection for 2-position models. Self-centering shaft adapter (shaft coupling) for wide range of shaft sizes. Models available for use with two-position, single pole single throw (spst), line- (Series 40) or low- (Series 80) voltage controls. Models available for use with floating or switched single-pole, double-throw (spdt) (Series 60) controls. Models available for use with proportional current or voltage (Series 70) controls. Models available with combined floating/modulating control in a single device. Models available with adjustable zero and span. Models available with line-voltage internal end switches. Access cover to facilitate connectivity. Metal housing with built-in mechanical end limits. Spring return direction field-selectable. Shaft position indicator and scale. Manual winding capability with locking function. UL (cUL) listed and CE compliant. All Models are plenum-rated per UL873. Specifications Actuator Type: Damper, ValveApplication Type: HVAC Fail Safe Mode: Spring ReturnControl Signal: 2 position, SPSTSupply Voltage: 100 to 250 VacShaft Adapter Type: Self Centering clampingManual Operation: Manual CrankMounting: Direct CoupledFrequency: 60 Hz, 50 HzRotational Stroke: 95 ¬+/- 3 degreesRotational Stroke Adjustment: Mechanically limited 5 degree increments Spring Return Direction: By orientation Timing, Maximum Spring Return (sec): 20 sec Timing, Nominal Driving @ 60 Hz (sec): 45 Sec Dimensions (in.): 9.72 in high x 3.94 in wide x 2.95 in deep Compatible Damper Shafts (in.): 3/8 to 1.06 in. round or 3/8 to 11/16 in. square Temperature Range, Ambient (F): -40 to 140 F Operating Humidity Range (% RH): 5 to 95% RH, non-condensing Includes: Mounting bracket, self-centering shaft adapter, 3mm crank