Belimo ARX120-3 Actuator

The Belimo ARX120-3 Actuator is a robust non-spring return actuator designed for the precise control of dampers in HVAC systems. Delivering 180 in-lb of torque, this unit operates on a universal power supply ranging from 120 to 240 VAC, making it a versatile choice for retrofit and new construction projects. It supports on/off and floating point control, allowing for flexible integration into various building automation sequences. Engineered for high-load applications, the ARX120-3 features a manual override button to simplify commissioning and emergency positioning. The brushless DC motor technology ensures consistent performance and longevity by preventing motor burnout under stalled conditions. With its NEMA 2 (IP54) rated housing, this actuator handles demanding mechanical environments while maintaining electronic-based stall protection across its full 95-degree rotation range.

Key Benefits

• Universal Voltage Capability: Operates on any AC line voltage from 100 to 240V, reducing the need for multiple stock variants.
• High Torque Output: Provides 180 in-lb (20 Nm) of torque to reliably drive large damper assemblies without slippage.
• Maintenance-Free Design: Brushless DC motor eliminates the need for limit switches, protecting the gear train from mechanical stress.
• Field Flexibility: Features a reversible mounting bracket and adjustable end stops to match specific airflow requirements.

Common Questions

Is the Belimo ARX120-3 suitable for fail-safe applications?
No, this is a non-spring return actuator. For applications requiring a fail-safe position upon loss of power, a spring-return model or an electronic fail-safe (EFS) variant should be selected.

Can I use this actuator for proportional control?
The ARX120-3 is designed specifically for on/off or floating point control. If you require a 2-10VDC or 4-20mA modulating signal, look for the ARX24-MFT or similar proportional models.

How do I manually position the damper during installation?
There is a manual override button located on the actuator housing. Depressing this button disengages the gear train, allowing you to rotate the shaft to the desired position manually.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.