Overview
The Belimo AFRBUP is a spring-return damper actuator designed for On/Off safety control in HVAC systems. Operating across universal voltage (AC 24…240 V / DC 24…125 V), it provides reliable fail-safe spring positioning during power interruptions.
Features
- Fail-safe spring return mechanism ensures default safety position
- Wide universal operating voltage range
- Fast emergency spring fail-safe return time (<20 seconds)
- Pre-wired electrical cable connection for streamlined wiring
- Durable IP54 / NEMA 2 protective housing
Specifications
- Actuator Type: Spring Return Fail-Safe
- Control Type: On/Off
- Angle of Rotation: 90°
- Power Consumption: 7 W (Running), 3.5 W (Holding)
- Fail-Safe Time: <20 s
- Electrical Connection: Cable
- Protection Rating: IP54, NEMA 2
Applications
- Emergency fail-safe damper control in commercial HVAC systems
- Freeze protection and smoke/fire isolation dampers
- Outside air intake and exhaust damper control



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