Description
Electric Motor, Spring Return Fail Safe Mode. 24 Vac Modulating and Floating Control, Reversible Mount. 44 lb-in Torque, Standard US Model. Voltage Feedback Signal, No End Switches. 08 System Controlled Number. 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 avail able 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: Actuator Type: Damper, Valve. Application Type: HVAC. Fail Safe Mode: Spring Return. Control Signal: Floating, (0)2-10 Vdc (4-20 mA w/500 ohm resistor). Supply Voltage: 24 Vac +/- 20%. Shaft Adapter Type: Self Centering clamping. Manual Operation: Manual Crank. Mounting: Direct Coupled. Frequency: 60 Hz, 50 Hz. Rotational Stroke: 95 ?é?¼+/- 3 degrees. Rotational 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): 90 Sec. Spring Return Direction: By orientation. 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 F to 140 F. Operating Humidity Range (% RH): 5 to 95% RH, non-condensing. Includes: Mounting bracket, self-centering shaft adapter, 3mm crank.. Honeywell. Honeywell. MS7505A2008.
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