Siemens Actuator: Dampers, On/Off, Spring Return, 62 in-lb, 120V AC, Hardwired
The SIEMENS GMA221.1U is a fail-safe actuator with spring return for dampers, featuring a self-centering shaft coupling, 90° stroke, and CW/CCW shaft rotation. It operates on 120V AC input with a 5W power rating and…
SKU 3G-OTH-67542
Also listed as: GMA2211U · GMA221 1U · GMA221-1U
Local availability & support
- Delivery
- Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
- Payment
- Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.
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Product Description
The SIEMENS GMA221.1U is a fail-safe actuator with spring return for dampers, featuring a self-centering shaft coupling, 90° stroke, and CW/CCW shaft rotation. It operates on 120V AC input with a 5W power rating and provides a 0 to 10V DC output signal. This hardwired actuator is compatible with building automation systems.
Frequently Asked Questions
What is the Siemens GMA221.1U actuator used for?
The Siemens GMA221.1U is a fail-safe spring-return actuator for HVAC dampers in building automation systems. It provides 62 in-lb torque, 90° stroke, and operates on 120V AC. It ensures damper closure on power loss, making it suitable for critical ventilation and fire safety applications.
What are the specifications of the Siemens GMA221.1U?
The Siemens GMA221.1U has a 5W power rating, 120V AC input, 0 to 10V DC output, 90° stroke, and CW/CCW rotation. It features a self-centering shaft coupling, hardwired connection, NEMA 1 / IP54 enclosure, and is compatible with building automation systems. No auxiliary switch is included.
Where to buy the Siemens GMA221.1U worldwide?
3G Electric supplies the Siemens GMA221.1U actuator worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time; we source and deliver this fail-safe damper actuator globally.
How to install the Siemens GMA221.1U actuator?
Mount the Siemens GMA221.1U directly onto the damper shaft using the self-centering coupling. Ensure 120V AC power is disconnected during wiring. Connect hardwired leads per the wiring diagram. The spring return automatically closes the damper on power loss. Verify 90° stroke rotation before commissioning.
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Common applications for SiemensSiemens Products
3G Electric supplies Siemens fail-safe actuators with spring return. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
