SQM50.261R1Z3 Siemens Damper Motor

Overview

The Siemens SQM50.261R1Z3 is a high-precision reversing rotary actuator designed for the accurate positioning of air dampers, fuel flow control valves, and other components in burner management systems. Part of the SQM5 series, this electromotive actuator is engineered for applications requiring high modulating accuracy and repeatability. It features a robust die-cast aluminum housing and impact-proof plastic covers, making it suitable for continuous-duty industrial and commercial combustion environments.

Features

• Equipped with two limit switches and four internal auxiliary switches for flexible control
• Features a multi-input electronic circuit board supporting various control signals
• Includes an auto/manual selector switch and a manual forward/reverse toggle switch for easy adjustment
• Built-in disengagement clutches allow for the separate manual adjustment of the drive shaft and camshaft
• Provides externally visible position indication via a scale in the viewing window
• Maintenance-free gearwheels and bearings ensure long-term operational reliability

Specifications

• Model: SQM50.261R1Z3
• Torque: 90 in-lbs (10 Nm)
• Running Time: 8 seconds for 90 degree travel (at 60 Hz)
• Operating Voltage: 110-120 VAC
• Rotational Direction: Counterclockwise (CCW)
• Shaft Type: 10 mm round, single-ended
• Nominal Rotation Angle: 90 degrees (maximum 160 degrees)
• Protection Rating: NEMA 1, 2, 3, 3R, 4, and 12; IP54
• Agency Approvals: UL recognized, CSA certified, CE approved

Applications

• Precise positioning of air and gas dampers in industrial burners
• Control of fuel flow through butterfly valves or flow control valves
• Integration with linkageless burner management systems like the Siemens LMV5
• Use in HVAC and boiler systems requiring reliable, modulating rotary motion