Overview
The Belimo AFB24-S is a high-torque spring return damper actuator with an auxiliary switch for on/off fail-safe control and position feedback in HVAC systems.
Features
- Spring return fail-safe action ensures positive damper shut-off during power loss
- Integrated auxiliary switch for position feedback or fan control interlocking
- Robust construction with maintenance-free operation
- Universal shaft coupling for flexible installation
Specifications
- Torque: 180 in-lb [20 Nm]
- Nominal Voltage: AC 24 V / DC 24 V
- Control Type: On/Off
- Actuator Type: Spring Return with Auxiliary Switch
- Auxiliary Switch: 1 x SPDT
Applications
- Fail-safe damper operation in commercial HVAC systems
- System interlocking, fan control, and end-position verification



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