Belimo LMB24-3-S Motor Actuator

The Belimo LMB24-3-S is a high-performance rotary actuator engineered for precise control in HVAC applications requiring 45 in-lb torque. Designed for versatile integration, this 24V motor actuator supports on/off and floating point control signals, making it a reliable choice for damper regulation or valve automation. Operating on both 24VAC and 24VDC, the unit features an integrated SPDT auxiliary switch for end-stop signaling or interlocking circuits. The brushless DC motor technology ensures consistent runtime and stall protection throughout the 95-degree rotation range, eliminating the need for external limit switches. Its NEMA 2 / IP54 rated enclosure allows for installation in demanding environments, while the direct-coupling clamp simplifies mounting on shafts ranging from 1/4" to 5/8".

• Universal Compatibility: Operates on 24V AC/DC power supplies, providing flexibility for diverse control panels.
• Enhanced Feedback: Built-in auxiliary switch enables remote monitoring of the actuator's position.
• Field Reliability: Brushless motor design prevents burnout and ensures long-term performance under constant load.
• Manual Override: External push-button allows for manual positioning during commissioning or system testing.
• Consistent Timing: Delivers a steady 95-second motor run time for stable system response.

Common Questions

Can I use the LMB24-3-S for modulating control?
No, this specific model is designed for on/off or 3-point floating control. For 2-10VDC modulating applications, a different series would be required.

What is the function of the auxiliary switch on this model?
The "S" suffix indicates a built-in SPDT switch, typically used to confirm the damper position or to trigger auxiliary equipment once the actuator reaches a specific angle.

Does this actuator require a specific transformer?
It requires a Class 2 power supply. Ensure your transformer is sized correctly for the 1.5 VA (running) and 0.2 VA (holding) power consumption of this unit.

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.