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