Belimo SM24A-MOD Actuator

The Belimo SM24A-MOD is a high-torque rotary actuator designed for modulating control of dampers in HVAC systems. Delivering 150 in-lb [20 Nm] of torque, this unit is engineered for reliable operation of dampers up to approximately 37.5 sq. ft. It operates on a 24VAC/DC power supply and supports multi-protocol communication via Modbus RTU and BACnet MS/TP, allowing for seamless integration into Building Automation Systems (BAS). The brushless DC motor is controlled by an Application Specific Integrated Circuit (ASIC), providing precise positioning and overload protection throughout its 0° to 95° rotation. With an IP54 / NEMA 2 enclosure rating, the SM24A-MOD ensures durability in demanding mechanical environments. This non-spring return actuator features a manual override button and adjustable direction of rotation, making it a versatile solution for contractors managing complex airflow control requirements and pressure independent applications.

Key Benefits

• Digital Communication: Supports Modbus and BACnet protocols for enhanced data feedback and system transparency.
• High Torque Output: Provides 150 in-lb of torque to handle large-scale damper assemblies without binding.
• Constant Runtime: Maintains a consistent motor run time regardless of load, ensuring predictable system response.
• Simple Installation: Universal spindle clamp and anti-rotation strap allow for quick mounting on various shaft sizes.
• Energy Efficient: Low power consumption during holding and operation reduces overall transformer sizing requirements.

Common Questions

How do I configure the communication parameters for Modbus?
The SM24A-MOD can be addressed and configured using the Belimo Assistant App via Near Field Communication (NFC) or through the PC-Tool via the service plug.

Can this actuator be used in a master-slave configuration?
Yes, the modulating signal and digital interface allow for coordinated operation in complex air handling sequences.

What happens if the actuator encounters an obstruction?
The integrated ASIC provides electronic stall protection, stopping the motor automatically at end stops or if a blockage is detected to prevent mechanical failure.

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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.