SQM56.680R1G3 Siemens Damper Motor

Overview

The Siemens SQM56.680R1G3 is a high-torque reversing actuator designed for the precise positioning of air and gas dampers, flow control valves, and butterfly valves in industrial and commercial burner applications. Engineered for precision and repeatability, this electromotive actuator is particularly well-suited for systems requiring a high degree of modulating accuracy. It features a robust design with die-cast aluminum housing and impact-resistant plastic covers, ensuring durability in demanding HVAC and process heating environments.

Features

• High torque output of 400 in-lbs for handling large dampers and valves
• Equipped with 8 internal, easily adjustable switches (2 limit and 6 auxiliary)
• Integrated AGA56.41A97 circuit board for 4-20 mA control input
• Field-reversible rotation (clockwise or counterclockwise)
• Drive shaft and cam drum disengagement clutches for quick manual alignment
• Auto/manual selector switch and manual forward/reverse toggle switch for direct control
• Externally visible shaft position indicator for easy monitoring
• Low hysteresis gearing and high rotational resolution for precise modulation

Specifications

• Model Number: SQM56.680R1G3
• Operating Voltage: 110-120 VAC (50/60 Hz)
• Torque: 400 in-lbs (45 Nm)
• Running Time: 50 seconds for 90 degrees at 60 Hz (60 seconds at 50 Hz)
• Control Signal: 4-20 mA input
• Feedback Potentiometer: 1000 Ohm, 90-degree
• Number of Switches: 8 SPDT switches
• Protection Rating: NEMA 1, 2, 3, 3R, 3S, 5, 12, and 13
• Operating Temperature: -5 F to 140 F (-20 C to 60 C)
• Shaft: No shaft included (requires separate selection of one or two-ended shafts)

Applications

• Load-dependent control of gas flow, oil volume, and combustion air in medium to large capacity burners
• Positioning of air and gas dampers in industrial process heating
• Control of butterfly and flow control valves in dual-fuel systems
• Use in commercial HVAC systems requiring high turndown and reliable ignition positions
• Integration with 3-position or modulating controllers for precise thermal processing