Dwyer Instruments SERIES DDA, SERIES DDC Catalog Page

5-23/32

[145.26]

4-53/64

[122.63]

17/32 SQ

[13.49]

3-25/64

[86.12]

63/64

[25.00]

2-59/64

[74.22]

1-47/64

[44.05]

9/64

[3.57]

21/32

[16.67]

Series

DDA

DDC

Non-Spring Return Direct Coupled Actuators

Low Cost, Two-Position or Modulating

AIR QUALITY

Damper Actuators

DDA and DDC Series Direct Coupled Actuators are non-spring return

actuators that are perfect for positioning of dampers and valves in HVAC systems. DDA actuators are designed to accept floating control signals and come in a variety of power supplies. DDC actuators are designed to accept 4 to 20 mA or 0 to 10 VDC modulating control signals and are 24 VAC powered. DDC units feature a 0 to 10 VDC feedback signal of damper position. Actuators produce 17 to 70 in-lb (2 to 8 Nm) of torque. Contact factory for optional internal auxiliary switch on DDA.

FEATURES

• Direct mount

• Actuator travel indicator

• Overload protection

• Manual override

• Floating control signal on DDA

• Modulating 4 to 20 mA or 0 to 10 VDC control signal on DDC

• Position feedback signal on DDC

• 60,000 cycles nominal

Model DDA11 DDA13 DDA21 DDA23 DDA31 DDA33 DDA41 DDA43 DDC13 DDC23 DDC33 DDC43

Size/ Torque

17 in-lb [2 Nm] 17 in-lb [2 Nm] 35 in-lb [4 Nm] 35 in-lb [4 Nm] 53 in-lb [6 Nm] 53 in-lb [6 Nm] 70 in-lb [8 Nm] 70 in-lb [8 Nm] 17 in-lb [2 Nm] 35 in-lb [4 Nm] 53 in-lb [6 Nm] 70 in-lb [8 Nm]

Supply Voltage

110 VAC 24 VAC 110 VAC 24 VAC 110 VAC 24 VAC 110 VAC 24 VAC 24 VAC 24 VAC 24 VAC 24 VAC

Input

Floating Floating Floating Floating Floating Floating Floating Floating Modulating Modulating Modulating Modulating

SPECIFICATIONS Power Requirements: DDA: 110 VAC, 24 VAC, ±10%, 50/60 Hz, single

phase. Optional 230 VAC; DDC: 24 VAC, ±10%, 50/60 Hz, single phase. Power Consumption: DDA: 110 VAC models: 5 VA, 230 VAC models: 5 VA, 24 VAC models: 3 VA; DDC: 4 VA. Control Input: DDA: Two-position, floating; DDC: 4-20 mA or 0-10 VDC.

Overload Protection: Magnetic clutch. Angle of Rotation: 95° (mechanically adjustable). Fits Shaft Diameter: 0.4˝ (10 mm) or 0.5˝ (13 mm). Position Indication: Visual indicator. Direction of Rotation: CW/CCW. Running Time: 17 in-lb, 35 in-lb, 53 in-lb: 72 sec.; 70 in-lb:160 sec. Electrical Connection: Terminal block, 18 AWG. Manual Override: Push button. Temperature Limit: -22 to 122°F (-30 to 50°C). Sound: <45 dB. Life Expectancy: 60000 full cycles. Housing: NEMA 2 (IP40). Standard Accessories: (2) imitative baffles, (2) baffle setscrews, (1)

actuator body setscrew, and (1) aluminum gasket. Weight: 1.72 lb (0.78 kg).

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