Overview
The Belimo FSTF230-S US is a 230V spring return actuator with integrated auxiliary switches designed for fire and smoke dampers. It offers compact 18 in-lb actuation for small life-safety damper assemblies.
Features
- Mechanical spring return fail-safe protection on power loss
- Two integrated SPST auxiliary switches for position indication
- Direct 230V AC line power input
- Compact size enables mounting in restricted locations
- Complies with UL555 and UL555S fire/smoke requirements
Specifications
- Actuator Type: Spring return
- Torque: 18 in-lb [2 Nm]
- Voltage: AC 230 V
- Control Type: On/Off
- Auxiliary Switches: 2 x SPST
- Angle of Rotation: 95°
- Degree of Protection: IP42, NEMA 2, UL Enclosure Type 2
Applications
- Fire and smoke damper control in 230V commercial HVAC systems
- Life-safety air management requiring end-switch status monitoring



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