Description
The Siemens GMA121.1U is a 2-position, spring-return damper actuator engineered for dependable on/off control in commercial and industrial HVAC applications. Designed to operate at 24V, it delivers 62 lb-in of torque to reliably drive dampers to the open or closed position. The spring-return mechanism ensures fail-safe operation — automatically driving the damper to its de-energized position in the event of a power loss, making it an ideal choice for safety-critical ventilation and air handling systems.
Key Features
- 2-position (on/off) spring-return control for fail-safe damper operation
- 24V supply voltage for compatibility with standard low-voltage HVAC control systems
- 62 lb-in (7 Nm) torque output for positive damper positioning
- Spring-return mechanism automatically returns damper to safe position on power loss
- Compact, robust housing suitable for commercial and industrial HVAC environments
- Designed for use with Siemens Building Technology control systems and compatible third-party controllers
- Easy direct-coupled mounting — no crank arm or linkage required
Typical Applications
- Air handling units (AHUs)
- Variable air volume (VAV) systems
- Exhaust, return, and outside air dampers
- Commercial building automation and HVAC control systems
Specifications
- SKU: GMA121.1U
- Brand: Siemens Building Technology
- Control Type: 2-Position (Spring Return)
- Supply Voltage: 24V
- Torque: 62 lb-in
- Actuator Type: Electric Damper Actuator
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