SQM50.480A2G3 Siemens Damper Motor

Overview

The Siemens SQM50.480A2G3 is a high-precision electromotive actuator designed for the accurate positioning of air and gas dampers, flow control valves, and butterfly valves in industrial and commercial burner systems. This reversing actuator is engineered for heavy-duty applications, providing reliable load-dependent control of fuel and air volumes to optimize combustion efficiency. It is part of the robust SQM5 series, known for its modular design and high modulating accuracy, making it suitable for complex HVAC and process heating environments.

Features

• High torque output of 15 Nm (140 in-lbs) for managing larger dampers and valves
• Reversing motor functionality allows for precise positioning in both directions
• Equipped with 8 internal switches (2 end switches and 6 auxiliary switches) that are easily adjustable
• Modular design supports exchangeable circuit boards for various control signals and position feedback
• Integrated auto/manual toggle switch and externally visible position indicator for simplified commissioning
• Durable construction with a designed lifetime of 250,000 burner startup cycles (approximately 10 years)
• Disengageable drive shaft and camshaft for easy manual adjustments or maintenance

Specifications

• Model: SQM50.480A2G3
• Torque Rating: 15 Nm (140 in-lbs)
• Running Time: 30 seconds for 90 degrees (at 50 Hz) or 25 seconds (at 60 Hz)
• Supply Voltage: AC 220 V to 240 V (+10% / -15%)
• Control Signal: 4-20 mA DC input
• Output Signal: 0 to 1000 Ohm potentiometer (90 degree)
• Rotation: Counterclockwise (CCW)
• Shaft Configuration: Designed for use without a pre-installed shaft (shafts available separately)
• Protection Rating: IP54 (with appropriate cable glands)
• Operating Temperature: -20 C to +60 C

Applications

• Load-dependent control of gas flow, oil volume, and combustion air in large-scale burners
• Positioning of flow control valves and butterfly valves in industrial process heating
• Automation of air and gas dampers in HVAC systems
• Integration with 3-position or modulating controllers and burner control systems like the Siemens LMV series
• Suitable for use in oil and gas burners of medium to large capacity in industrial boiler plants