Spring Return Direct Coupled Actuator

MS4103, MS7403, MS7503, and MS8103 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 on all models Self-centering shaft adaptor (shaft coupling) for wide range of shaft sizes Models available for use with two-position, SPST, line- (Series 40) or low- (Series 80) voltage controls Models available for use with floating or switched SPDT (Series 60) controls Models available for use with proportional current or voltage (Series 70) controls Models available with combined floating and modulating control in a single device Models available with an internal end switch Access cover to facilitate connectivity Durable plastic housing with built-in mechanical end limits Spring return direction field selectable Shaft position indicator and scale UL (cUL) listed and CE compliant All models are plenum rated per UL873 Specifications: Torque/Force (lb-in., lbf): 44 lb-in. Torque/Force (Nm, N): 5 Nm Fail Safe Mode: Spring Return Control Signal: Floating Control Signal: (0)2-10 Vdc (4-20 mA w/500 ohm resistor) Supply Voltage: 24 Vac/dc Number of Internal Auxiliary Switch: 1 Type of Internal Auxiliary Switch:adjustable 0-95 degrees Switch Ratings: 250 Vac, 8 A res (5 A ind) External Auxiliary Switches Available: No Shaft Adapter Type: Self-centering clamping Feedback: (0)2-10 Vdc Manual operation:N/A Spring Return Torque/Force (lb-in., lbf): 44 lb-in. Spring Return Torque/Force (Nm, N): 5 Nm Maximum Stall Torque/Force (lb-in., lbf): 105 lb-in. Maximum Stall Torque/Force (Nm, N): 12 Nm Mounting: Direct Coupled Frequency: 50, 60 Hz Rotational Stroke: 95 ±3 degrees Rotational Stroke Adjustment: Mechanically limited 5 degree increments Rotation to Open: By switch Spring Return Direction: By orientation Timing, Maximum Spring Return (sec): 25 sec Timing, Nominal Driving @ 60 Hz (sec):90 sec Compatible Damper Shafts (in.): 3/8 to 5/8 in. round or 1/4 to 1/2 in. square Compatible Damper Shafts (mm): 9 to 16 mm round or 6 to 13 mm square Materials: Plenum rated plastic housing Power Consumption (Driving): 8 VA Input Impedance: Min. 95 kOhm Electrical Connections: Enclosed screw terminal strip (22 to 14 AWG) Temperature Range, Ambient (F): .-40 F to +149F Temperature Range, Storage (F): .-40 F to +150F Temperature Ratings (Shipping)(F): .-40 F to +150F Operating Humidity Range (% RH): 5 to 95% RH, non-condensing Maximum Noise Rating, Driving (dB(A) @ 1m): 40 Maximum Noise Rating, Holding (dB(A) @ 1m): 20 (no audible noise) Environmental Rating: NEMA2 Ingress Protection Rating: IP54 Includes: Mounting bracket, self-centering shaft adapter