Two Position Damper Actuator w/ Spring Return for Fire and Smoke, 24v (175 lb-in)

Spring return direct coupled actuators (DCA) for on/off damper control with an integral junction box. The actuator accepts an on/off signal from a single-pole, single-throw (SPST) controller. They are designed to operate reliably in smoke control systems requiring Underwriter's Laboratories Inc. UL555S ratings up to 350 F. Features 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 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: DamperApplication Type: Fire and Smoke Fail Safe Mode: Spring ReturnControl Signal: SPST, 2 PositionSupply Voltage: 24 Vac +/- 20% Shaft 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): 15 sec Timing, Nominal Driving @ 60 Hz (sec): 15 SecSpring Return Direction: By orientation Dimensions (in.): 10.67 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 F to 130 F Operating Humidity Range (% RH): 5 to 95% RH, non-condensing Includes: Self-centering shaft adapter, 3mm crank