Siemens GMA Series Spring Return Electric Damper Actuator
The OpenAir GMA Series Direct Coupled, Spring Return Electronic Damper Actuators provide modulating, two position and floating control of building HVAC dampers.
• 24 Vac/dc compatible
• Integral 1/2-inch conduit connector
• Small actuator footprint with 62 lb.-in. of torque
• Bi-directional fail-safe spring return
• Unique self-centering shaft coupling
• Floating control models available with feedback potentiometer
• Manual override
• Mechanical range adjustment capability
• Easily visible position indicator
• Brushless DC motor technology
• Precabled
• UL60730, cUL (C22.2 No. 24-93), and CE listed
• All modulating types contain built-in feedback Options
• Dual independently adjustable auxiliary switch
• Adjustable offset and span
• Signal inversion
Select a link under the "item" tab below to order.
| Cat # | Input Signal | Standard | Cabling | Dual Aux. Switches Only |
| GMA161.1P | Modulating, 0 to 10 Vdc, 24 Vac/dc | GMA161.1P GMA161.1P | Plenum Cable | GMA166.1P |
| GMA161.1U | Modulating, 0 to 10 Vdc, 24 Vac/dc | GMA161.1U | Standard | GMA166.1U |
| GMA151.1P | Modulating, 24 Vac/dc 2 to 10 Vdc/10 to 2 Vdc (Signal inversion) | GMA151.1P | Plenum Cable | GMA156.1P |
| GMA151.1U | Modulating, 24 Vac/dc 2 to 10 Vdc/10 to 2 Vdc (Signal inversion) | GMA151.1U | Standard | GMA156.1U |
| GMA121.1P | 2-position, 24 Vac/Vdc | GMA121.1P | Plenum Cable | GMA126.1P |
| GMA121.1U | 2-position, 24 Vac/Vdc | GMA121.1U | Standard | GMA126.1U |
| GMA221.1U | 2-position, 120 Vac | GMA221.1U | Standard | GMA226.1U |
| GMA131.1P | Floating, 24 Vac/Vdc | GMA131.1P | Plenum Cable | - |
| GMA131.1U | Floating, 24 Vac/Vdc | GMA131.1U | Standard | GMA136.1U |
| Operating Voltage | GMA12x, GMA13x, GMA16x, GMA15x: 24 Vac ±20%; 24 Vdc ±15% GMA22x: 120 Vac ±10% |
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| Frequency | 50/60 Hz | ||
| Power Consumption | 24 Vac/dc | ||
| Running: | 5 VA/3.5W | ||
| Holding: | 4 VA/3W | ||
| Equipment Rating | Class 2, in accordance with UL/CSA | ||
| Control Signal | Input Signal (wires 8-2) | GMA16x | |
| Voltage Input | GMA16x | 0 to 10 Vdc (max. 35 Vdc) | |
| GMA15x | 2 to 10 Vdc (max. 35 Vdc) | ||
| Input Resistance | >100K Ohms | ||
| Control Signal Adjustment | Offset (Start Point) | 0 to 5 Vdc | |
| Factory Setting | 0 V | ||
| Span | 2 to 30 Vdc | ||
| Factory Setting | 30 V | ||
| Dual Auxiliary Switch | Contact Rating AC Rating: 4 to 250 Vac AC 6 A resistive AC 2A General Purpose DC Rating: 12 to 30 Vdc DC 2 A |
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| Position Feedback | 0 to 1000 Ohm <10 mA | ||
| Feedback Signal | Position output signal (wires 9-2) GMA16x.xx/ GMA15x.xx |
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| Voltage Output | GMA16x | 0 to 10 Vdc | |
| GMA15x | 2 to 10 Vdc | ||
| Max. Output Current (both) | +1 mA, -0.5 mA | ||
| Running Torque | 62 lb.-in. (7 Nm) | ||
| Spring Return Torque | 62 lb.-in. (7 Nm) | ||
| Max. Torque | 186 lb.-in. (21 Nm) | ||
| Runtime for 90° operating with motor | 90 sec | ||
| Closing on power loss | 15 sec. typical (60 sec. Max. at -25°F) |
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| Nominal Angle of Rotation | 90°, 95° max | ||
| Shaft Dimensions | 1/4 to 3/4-in. (6 to 20.5 mm) Dia. 1/4 to 1/2-in. (6 to 13 mm) Sq. |
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| Min. Shaft Length | 3/4-in. (20 mm) min. length | ||
| Temperature | Operating | -25 to +130°F (-32 to +55°C) | |
| Storage | -25 to +158°F (-32 to +70°C) | ||
| Humidity | 95% RH, non-condensing | ||
| Agency Approvals | UL listed UL60730 (Replacing UL873) C-UL certified to Canadian Standard C22.2 No. 24-93 CE |
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| Housing | Enclosure | NEMA 1 | |
| Material | Die-cast Aluminum Alloy | ||
| Gear Lubrication. | Silicone free | ||
| Pre-cabled Connection | 18 AWG, 3 ft. (0.9 m) | ||
| Life Cycle | Designed for over 60,000 full strokes at rated torque and temperature | ||
| Dimensions | 8.38" H x 3.25" W x 2.67" D (212 mm H x 83 mm W x 68 mm D) |
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| Shipping Weight | 2.86 lbs. (1.3 kg) | ||
