SQM50.481A2 Siemens Damper Motor

Overview

The Siemens SQM50.481A2 is a high-precision reversing actuator designed for the accurate positioning of air and gas dampers, as well as flow control and butterfly valves. Engineered for use with medium to large capacity oil and gas burners, this robust motor is built with a die-cast aluminum housing and impact-resistant plastic covers. It utilizes a synchronous motor to provide consistent torque and timing, making it ideal for applications requiring high modulating accuracy and repeatability.

Features

• Equipped with 8 internal, easily adjustable auxiliary switches for versatile control configurations
• Features a self-locking synchronous motor that ensures position is maintained even if power is lost
• Includes an integrated auto/manual toggle switch and an externally visible shaft position indicator
• Modular design allows for the addition of various electronic modules and potentiometers
• Designed for flexible mounting in any orientation to suit diverse industrial burner setups
• Durable construction with a life cycle rated for approximately 250,000 burner startup cycles

Specifications

• Model: SQM50.481A2
• Operating Voltage: AC 220-240 V (50/60 Hz)
• Torque: 140 in-lb (10 Nm) nominal
• Running Time: 30 seconds for 90 degree rotation at 50 Hz (approx. 25 seconds at 60 Hz)
• Number of Switches: 8 (including 2 end switches and 6 auxiliary switches)
• Shaft Type: 10 mm diameter round shaft with keyway (AGA58.1)
• Protection Rating: IP54 (when appropriate cable glands are used)
• Temperature Range: -5 F to 140 F (-20 C to +60 C)

Applications

• Supervision and control of combustion air, gas flow, and oil volume in industrial burners
• Precise positioning of butterfly valves and air dampers in HVAC and boiler systems
• Used in conjunction with Siemens burner controls or other modulating controllers for load-dependent regulation
• Suitable for various industrial process applications requiring reliable rotary motion and high torque output