SQM50.261R1G4 Siemens Damper Motor

Overview

The Siemens SQM50.261R1G4 is a high-precision reversing actuator designed for the accurate positioning of dampers and valves in industrial and commercial burner applications. Part of the SQM5 series, this motor is engineered for reliability and repeatability, providing 90 in-lbs of torque with a rapid 8-second running time for 90-degree rotation. It features a robust design capable of mounting in any position and includes electronic self-supervision to ensure safe operation within combustion systems.

Features

• Internal switches including two limit switches and four auxiliary switches for precise control
• Auto/manual selector switch and manual forward/reverse toggle for easy commissioning and adjustments
• Low hysteresis drive mechanism and potentiometer gearing for superior modulating accuracy
• Externally visible shaft position indicator for immediate visual monitoring
• Field-reversible rotational direction for installation flexibility
• Disengagement clutches for the drive shaft and cam drum to allow quick manual alignment

Specifications

• Model: SQM50.261R1G4
• Torque: 90 in-lbs (10 Nm)
• Running Time: 8 seconds (at 60 Hz) for 90-degree rotation
• Operating Voltage: 110-120 VAC
• Control Input: 4-20 mA
• Shaft Type: 10 mm round, single-ended
• Rotational Direction: Clockwise (CW)
• Protection Rating: NEMA 1, 2, 3, 3R, 3S, 5, 12, 13 (IP54)
• Operating Temperature: -15°C to +60°C (5°F to 140°F)

Applications

• Positioning of air and gas dampers in burner management systems
• Control of flow control valves and butterfly valves for fuel/air ratio management
• Industrial process heating requiring high degrees of modulating accuracy
• Commercial boiler systems and high-turndown burner applications
• Compatible for use with Siemens LMV5 burner controls and various valve assemblies