SQM50.264R2Z3 Siemens Damper Motor

Overview

The Siemens SQM50.264R2Z3 is a high-precision reversing actuator designed for the accurate positioning of air dampers, fuel-air ratio controls, and flow control valves in medium to large capacity oil and gas burners. Engineered for industrial and commercial combustion systems, this electromotive motor offers exceptional modulating accuracy and repeatability. Its modular design allows for significant flexibility through exchangeable circuit boards, shafts, and potentiometers, making it an ideal choice for both new installations and the replacement of competitive actuators.

Features

• Reversing actuator with field-reversible clockwise or counterclockwise operation
• Integrated 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 shaft position indicator for easy monitoring
• Modular construction supporting field-exchangeable circuit boards, potentiometers, and shafts
• Low hysteresis gearing and high rotational resolution for precise process control
• Rugged die-cast aluminum housing with impact-proof and heat-resistant plastic covers

Specifications

• Model: SQM50.264R2Z3
• Torque: 90 in-lbs (10 Nm)
• Running Time: 8 seconds for 90 degree travel at 60 Hz (10 seconds at 50 Hz)
• Operating Voltage: 220-240 VAC (50/60 Hz)
• Auxiliary Switches: 6 internal SPDT switches (2 limit switches and 4 auxiliary switches)
• Control Input: Multi-input via AGA56.9… board (supports various signals including 4-20 mA, 0-10 VDC, and floating control)
• Shaft Type: 3/8 inch square shaft, dual-ended
• Approvals: CE approved, UL recognized, and CSA certified

Applications

• Load-dependent control of gas flow, oil volume, and combustion air volume in burner systems
• Positioning of flow control valves, butterfly valves, and dampers
• Precise fuel-air ratio regulation in industrial process heating and boilers
• High-turndown burner applications requiring separate light-off and low-fire positions
• Industrial and commercial HVAC systems requiring reliable rotary motion and modulating accuracy