SQM50.464R1A3 Siemens Damper Motor

Overview

The Siemens SQM50.464R1A3 is a high-precision reversing actuator designed to provide accurate rotary motion for the positioning of dampers, flow control valves, and butterfly valves. Engineered for industrial and commercial burner applications, this actuator is particularly suited for systems requiring a high degree of modulating accuracy and repeatability. It features a robust design that allows for mounting in any position and includes a selection of field-exchangeable circuit boards and shafts to ensure installation flexibility and compatibility with various control systems.

Features

• Internal adjustable switches including two limit switches and four auxiliary switches for precise control
• Auto/manual selector switch and manual forward/reverse toggle switch for easy field adjustments
• Externally visible position indicator for quick status verification
• Drive shaft and cam drum disengagement clutches to facilitate manual positioning
• Low hysteresis gearing for both the actuator and the integrated potentiometer
• Field-reversible rotational direction, supporting both clockwise and counterclockwise operation
• Durable construction suitable for demanding industrial environments with a wide operating temperature range

Specifications

• Model: SQM50.464R1A3
• Operating Voltage: 110-120 VAC (50/60 Hz)
• Torque: 140 lb-in (nominal)
• Running Time: 25 seconds for 90-degree rotation at 60 Hz (30 seconds at 50 Hz)
• Control Type: Position proportional or floating control
• Shaft Type: 3/8-inch square, dual-ended shaft
• Potentiometer: Integrated 1000 Ohm, 90-degree feedback potentiometer
• Rotational Direction: Counterclockwise (CCW) standard, field-reversible
• Approvals: UL recognized and CSA certified
• Operating Temperature: -5°F to 140°F (-20°C to 60°C)

Applications

• Positioning of air and gas dampers in industrial burner systems
• Control of flow control valves and butterfly valves for precise fuel-to-air ratio management
• Use in HVAC and process heating applications requiring reliable modulating control
• Replacement of competitive actuators using various mounting brackets and shaft adapters
• Integration with Siemens burner controls and flame safeguard systems for automated operation