Overview
The Belimo FSTF120-S.1 US is a 120V spring-return fire and smoke actuator equipped with dual auxiliary switches for position feedback.
Features
- Two integrated SPST auxiliary switches for remote status signaling
- Spring-return fail-safe operation upon power interruption
- Coldweld clamp design secures shaft without crushing hollow shafts
- Reversible mounting design for flexible rotation alignment
Specifications
- Actuator Type: Spring return
- Voltage: AC 120 V
- Control Type: On/Off
- Torque: 18 in-lb [2 Nm]
- Auxiliary Switches: 2 x SPST
- Running Time (Fail-safe): <25 s
- Degree of Protection: IP42, NEMA 2, UL Enclosure Type 2
Applications
- Smoke and combination fire/smoke damper management requiring position feedback
- Integration with building fire protection and safety systems



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