Description
The Siemens GMA121.1P is a 2-position spring-return damper actuator engineered for dependable, fail-safe operation in commercial HVAC and building automation applications. Designed and manufactured by Siemens Building Technology, this actuator delivers precise on/off damper control with an automatic spring-return function that drives the damper to its fail-safe position upon loss of power — a critical safety feature for smoke control, ventilation, and air-handling systems.
Key Features
- 2-position (open/closed) spring-return operation for reliable fail-safe damper positioning
- 24V AC/DC control voltage for compatibility with standard building automation and HVAC control systems
- 62 lb-in (7 Nm) torque output suitable for a wide range of commercial damper applications
- Plenum-rated cable meets code requirements for installation in air-handling plenum spaces
- Spring-return mechanism ensures damper returns to safe position on power loss
- Compact, robust housing designed for long service life in demanding HVAC environments
- Direct-coupled mounting for easy installation without crank arms or linkages
Typical Applications
- Commercial HVAC air handling units (AHUs)
- Ventilation and exhaust damper control
- Building automation and energy management systems
- Smoke and fire damper control interfaces
- Fan coil unit and VAV system dampers
Product Specifications
- Model: GMA121.1P
- Brand: Siemens Building Technology
- Operation: 2-Position Spring Return
- Control Voltage: 24V AC/DC
- Torque: 62 lb-in
- Cable Type: Plenum-Rated
The Siemens GMA121.1P is a trusted choice for mechanical contractors, controls technicians, and building automation professionals who demand reliable, code-compliant damper actuation. Its plenum-rated cable ensures safe installation in air plenums without the need for additional conduit, simplifying installation and reducing labor costs.
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