SIEMENS
Siemens GMA221.1U 2PT SR 120V 62 in-lb line protection
Actuator for damper control with 62 in-lb torque, 120V AC input and spring return in 15 seconds
- Spring-return safety for damper control
- 62 in-lb torque handles heavy dampers
- 120 V AC supply fits standard wiring
- 15-second close time ensures quick response
- IP54 rating protects against dust and splashes
Siemens GMA221.1U 2PT SR 120V 62 in-lb line
This Siemens actuator provides on/off damper control for building automation systems. It operates on 120V AC input and delivers a 0 to 10V DC output signal. The unit produces 62 in-lb of rated torque with a spring return function. Its NEMA 1 and IP54 ratings suit indoor environments.
Direct mount design with self-centering shaft
The actuator mounts directly to the damper shaft without separate brackets. A self-centering shaft coupling accommodates CW/CCW rotation through 90 degrees. Hardwired electrical connections integrate into existing building automation wiring. Spring return action drives the damper to a safe position within 15 seconds during power loss.
Suits building automation on/off damper applications
This model fits projects requiring 120V AC supply and 62 in-lb torque for 90 degree damper stroke. It is not suitable for modulating control requiring proportional positioning. Installations needing higher torque ratings or different voltage supplies should consider other options.
Highlights
- Spring-return safety for damper control
- 62 in-lb torque handles heavy dampers
- 120 V AC supply fits standard wiring
- 15-second close time ensures quick response
- IP54 rating protects against dust and splashes
Specifications
| Brand | SIEMENS |
|---|
Questions about this item
Will the 15-second closing time keep up with fast cycling demands?
The actuator closes in 15 seconds, so repeated cycles faster than that will exceed its mechanical speed limit.
Does the IP54 enclosure stay cool during continuous 120V operation?
IP54 protects against dust and splashes; the unit draws 120V AC and dissipates heat through the NEMA 1 housing during all-day use.
Is a 0-10V DC controller already required to drive the output signal?
Yes, the output signal is 0 to 10V DC, so a compatible building-automation controller must supply that reference for the actuator to operate.
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