SQM50.261R1G3R Siemens Damper Motor

Overview

The Siemens SQM50.261R1G3R is a high-precision, reversing electromotive actuator designed to position flow control valves, butterfly valves, dampers, or other components in oil and gas burner applications. Engineered for accuracy and repeatability, this actuator is particularly suited for systems requiring a high degree of modulating control. It features a robust design capable of mounting in any position and includes field-exchangeable circuit boards and shafts to provide maximum installation flexibility and ease of maintenance.

Features

• Equipped with two internal limit switches and up to four adjustable auxiliary switches
• Includes an auto/manual selector switch and a manual forward/reverse toggle switch for easy adjustments
• Features a drive shaft and cam drum that can be disengaged separately for simplified setup
• Utilizes a low-hysteresis design with double-offset drive and potentiometer gearing for precise positioning
• Provides an externally visible shaft position indicator for quick status monitoring
• Reversible clockwise operation specifically configured for this model suffix

Specifications

• Torque: 90 in-lbs (10 Nm)
• Running Time: 8 seconds for 90 degree rotation (at 60 Hz)
• Operating Voltage: 110-120 Vac, 50/60 Hz
• Control Input Signal: 4 to 20 mA (via AGA56.41 circuit board)
• Rotational Direction: Clockwise (CW) when facing the gear end
• Shaft Type: 10 mm round, single-ended shaft
• Nominal Rotation Angle: 90 degrees
• Protection Rating: UL recognized, CSA certified, and CE approved versions available

Applications

• Positioning of air and gas dampers in industrial and commercial burner systems
• Control of flow control valves and butterfly valves
• Use in HVAC systems requiring precise rotary motion and modulating accuracy
• Integration with Siemens burner controls such as the LMV5 series for optimized combustion efficiency