Description 

The Belimo SM24A-MOD Rotary Actuator is a high-torque modulating actuator designed for advanced HVAC airflow and damper control applications. Operating on AC/DC 24 V power, the actuator delivers 180 in-lb (20 Nm) torque with BACnet MS/TP, Modbus RTU, MP-Bus, and analog 2...10 V control support for seamless building automation integration. Its adjustable running time, IP54 protection, and hybrid communication capability provide dependable performance in commercial ventilation systems.

 

Technical Specifications 

Condition	New/Never Used Surplus
Brand	Belimo
Category	HVAC Controls
Part Number	SM24A-MOD
Subcategory	Rotary Actuators
Product Type	Rotary Actuator
Voltage Rating	AC/DC 24 V
Torque Output	180 In-Lb (20 Nm)
Control Type	BACnet MS/TP, Modbus RTU, MP-Bus, DC 2...10 V
Hybrid Control	Communicative / Analogue
Power Consumption Running	3.5 W
Power Consumption Holding	1.4 W
Power Consumption for Wire Sizing	6 VA
Electrical Connection	Cable 3 ft. [1 m], 6x 0.75 mm²
Direction of Motion	Selectable with Switch 0/1
Manual Override	Push-Button, Lockable
Angle of Rotation	95°
Running Time	150 Seconds / 90°
Running Time Range	86...346 Seconds
Mechanical Interface	Universal Shaft Clamp Reversible 10...20 mm
Protection Rating	IP54
NEMA Rating	NEMA 2
Enclosure Type	UL Enclosure Type 2
Ambient Temperature	-22°F to 122°F (-30°C to 50°C)
Application	HVAC Dampers
Weight	5 lb

 

 

Information About SM24A-MOD

The SM24A-MOD is a rotary actuator manufactured by Belimo for proportional damper control and smart building automation systems. Designed for AC/DC 24 V operation, the actuator supports BACnet MS/TP, Modbus RTU, MP-Bus, DC 2...10 V, and DC 0.5...10 V control signals for flexible integration into communicative and analog control networks. The actuator provides 180 in-lb (20 Nm) torque with selectable motor direction, adjustable running times from 86 to 346 seconds, and a 95° rotation range for precise airflow management. Built with IP54 and NEMA 2 protection ratings, lockable manual override functionality, and a reversible universal shaft clamp, the actuator is suitable for demanding commercial HVAC installations.

Key Features:

• 180 In-Lb Torque Output: Supports reliable operation of commercial HVAC dampers.
• BACnet and Modbus Communication: Integrates directly with building automation systems.
• Hybrid Control Compatibility: Supports analog and communicative control architectures.
• AC/DC 24 V Operation: Compatible with standard low-voltage HVAC systems.
• Adjustable Running Time: Configurable motor timing from 86 to 346 seconds.
• Manual Override Function: Includes lockable push-button override for maintenance.
• IP54 and NEMA 2 Protection: Protects against dust and moisture exposure.
• Reversible Universal Shaft Clamp: Supports flexible installation on 10...20 mm shafts.

The SM24A-MOD delivers the reliability and precision required for commercial HVAC airflow and building automation control applications.