Overview
The Siemens SQM56.667R1G7R is a high-torque reversing rotary actuator designed for the precise positioning of dampers, flow control valves, butterfly valves, and other HVAC components requiring rotary motion. Part of the SQM56 series, this heavy-duty motor is engineered for industrial and commercial applications that demand exceptional modulating accuracy and repeatability. It features a robust die-cast aluminum housing and impact-resistant plastic covers, ensuring durability in demanding environments.
Features
- Ultra-high torque capacity of up to 400 in-lbs for managing heavy loads and large dampers
- Reversing capability with factory configuration for clockwise (CW) rotation
- Integrated double potentiometer for accurate position feedback and control
- Internal auto/manual selector switch and manual forward/reverse toggle switch for simplified commissioning
- Disengagement clutches for the drive shaft and cam drum to allow for quick manual alignment
- Externally visible position indicator for easy status monitoring
- Low hysteresis gearing and synchronous motor for high-resolution control
- Protection rating suitable for industrial use with various mounting orientations
Specifications
- Model: SQM56.667R1G7R
- Torque: 400 in-lbs
- Running Time: 50 seconds for 90 degree rotation
- Control Signal: 4-20 mA input (via AGA56 circuit board)
- Operating Voltage: 110-120 Vac (50/60 Hz)
- Rotation: Clockwise (CW)
- Shaft Type: 14 mm round shaft
- Switches: 6 internal switches (2 limit switches and 4 auxiliary switches)
- Potentiometer: Double potentiometer (ASZ series)
- Housing Material: Die-cast aluminum with plastic covers
Applications
- Positioning of air and gas dampers in industrial burner systems
- Control of large flow control valves and butterfly valves
- Precise modulating control for process heating applications
- Dual fuel applications using auxiliary switches for separate ignition and fire positions
- Heavy-duty HVAC damper control in commercial boiler systems


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