SQM50.461R1H3 Siemens Damper Motor

Overview

The Siemens SQM50.461R1H3 is a high-precision reversing actuator designed for the accurate positioning of air and gas dampers, flow control valves, and butterfly valves. Engineered for industrial and commercial burner applications, this electromotive damper motor is particularly suited for systems requiring a high degree of modulating accuracy and repeatability. It features a robust design with die-cast aluminum housing and impact-proof plastic covers, ensuring durability in demanding environments.

Features

• Reversing actuator with internal and external position indication for easy monitoring
• Equipped with up to six internal, easily adjustable auxiliary and limit switches
• Drive shaft and camshaft can be disengaged separately for simplified setup and maintenance
• Low hysteresis gearing with double-offset drive for precise control and high rotational resolution
• Field-reversible rotation, defaulting to counter-clockwise (CCW) operation
• Auto/manual selector switch and manual forward/reverse toggle switch for convenient field adjustments
• Maintenance-free gear train with synchronous motor for reliable, long-term operation

Specifications

• Model: SQM50.461R1H3
• Torque: 140 in-lbs (nominal holding and running torque)
• Running Time: 25 seconds for 90 degree rotation (at 60 Hz)
• Operating Voltage: 110-120 VAC (50/60 Hz)
• Control Input: 0 to 135 Ohm resistance signal
• Shaft Type: 10 mm round, single-ended shaft
• Rotation Direction: Counter-clockwise (CCW)
• Protection Rating: IP54 (with appropriate cable glands)
• Approvals: UL recognized, CSA certified, and CE approved

Applications

• Load-dependent control of gas flow and combustion air volume in oil and gas burners
• Positioning of flow control valves and butterfly valves in HVAC and industrial combustion systems
• Use with Siemens burner controls such as the LMV5 or LME series for safety shut-off and modulation
• Suitable for medium to large capacity burner systems requiring precise air-to-fuel ratio control