SQM56.687A1 Siemens Damper Motor

Overview

The Siemens SQM56.687A1 is a high-precision, electromotive reversing actuator designed to drive air and gas dampers in oil and gas burners of medium to large capacity. Engineered for reliability and accurate modulating control, this actuator is a critical component for optimizing the combustion process by regulating gas flow, oil volume, and combustion air volume. It features a robust die-cast aluminum housing with impact-proof plastic covers, making it suitable for demanding industrial and commercial environments.

Features

• Reversing motor allows for both clockwise and counterclockwise operation.
• Equipped with two limit switches and up to six internal auxiliary switches for versatile control.
• Features drive shaft and cam drum disengagement clutches for easy manual adjustment and maintenance.
• Includes an auto/manual selector switch and a manual control forward/reverse toggle switch.
• Externally visible position indicator provides quick status updates.
• Designed with low hysteresis gearing for high repeatability and modulating accuracy.
• Modular design supports field-exchangeable circuit boards, potentiometers, and shafts.

Specifications

• Model: SQM56.687A1
• Operating Voltage: AC 110 V (50/60 Hz)
• Rated Torque: 40 Nm (approx. 350-400 in-lbs)
• Running Time: 60 seconds for 90 degrees
• Rotation Angle: Adjustable up to 160 degrees
• Number of Switches: 8 (2 limit, 6 auxiliary)
• Shaft Diameter: 14 mm with keyway (single-ended)
• Protection Rating: IP54 (standard)
• Operating Temperature: -20 C to +60 C

Applications

• Load-dependent control of gas and air dampers in industrial burners.
• Positioning of flow control valves, butterfly valves, and dampers in HVAC systems.
• Suitable for use in oil and gas burners for process heating and large-scale boiler applications.
• Integration with 3-position or modulating controllers (e.g., 4-20 mA) for precise air-fuel ratio control.