SQM50.480R1H3 Siemens Damper Motor

Overview

The Siemens SQM50.480R1H3 is a high-precision reversing actuator designed for the accurate positioning of dampers and flow control valves in burner and combustion applications. Engineered for both industrial and commercial use, this electromotive actuator provides reliable rotary motion and is particularly well-suited for systems requiring a high degree of modulating accuracy and repeatability. Its robust die-cast aluminum housing ensures durability in demanding environments, while its modular design allows for extensive customization through exchangeable circuit boards and shafts.

Features

• Reversible synchronous motor that is locking-proof for enhanced reliability
• Internal and external position indication for easy monitoring of the actuator’s status
• Separate disengagement clutches for the drive shaft and camshaft to allow for quick manual alignment
• Equipped with eight internal SPDT switches, including two limit switches and six auxiliary switches
• Maintenance-free gearwheels and bearings contribute to a long service life
• Modular design supports field-exchangeable circuit boards and potentiometers for various control signals
• Field-reversible rotation (clockwise or counter-clockwise) to suit specific application needs

Specifications

• Model: SQM50.480R1H3
• Operating Voltage: 110-120 Vac (50/60 Hz)
• Torque: 140 lb-in (16 Nm)
• Running Time: 25 seconds for 90 degree rotation at 60 Hz (30 seconds at 50 Hz)
• Control Input: 0 to 135 Ohm (H-type circuit board)
• Number of Switches: 8 (2 limit, 6 auxiliary)
• Shaft Type: None (No shaft included; must be ordered separately)
• Angle of Rotation: Up to 160 degrees
• Enclosure Rating: IP54 (NEMA 12)
• Approvals: UL recognized, CSA certified, and CE approved

Applications

• Precise positioning of air and gas dampers in industrial and commercial burners
• Control of flow control valves and butterfly valves in combustion systems
• Ideal for high-turndown burner applications requiring separate ignition and low-fire positions
• Suitable for dual-fuel applications where multiple switch points are needed for different fuel types
• Used in HVAC and process heating systems to optimize airflow and fuel-to-air ratios