Overview
The Belimo LF24-3-S US is a spring-return damper actuator providing on/off and floating point control along with an integrated auxiliary switch for fail-safe applications.
Features
- True spring-return fail-safe action upon power loss
- Integrated SPDT auxiliary switch for auxiliary status feedback
- Constant running time independent of load
- Clear visual mechanical position indication
Specifications
- Torque: 35 in-lb [4 Nm]
- Nominal Voltage: AC/DC 24 V
- Control Signal: On/Off, Floating Point
- Auxiliary Switch: 1 x SPDT
- Running Time: 150 seconds (fail-safe <25 seconds)
Applications
- On/off and floating point control of dampers requiring fail-safe positioning
- Air handling unit and economizer control with safety interlocking



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