SQM50.260R2A Siemens Damper Motor

Overview

The Siemens SQM50.260R2A is a high-precision reversing actuator designed for the accurate positioning of air and gas dampers, flow control valves, and butterfly valves. Part of the robust SQM5 series, this electromotive actuator is engineered for both industrial and commercial burner applications that require a high degree of modulating accuracy and repeatability. It features a modular design with field-exchangeable circuit boards and a durable housing, ensuring long-term reliability in demanding HVAC and combustion environments.

Features

• Internal adjustable switches including two limit switches and four auxiliary switches for precise control sequencing
• Auto/manual selector switch and a manual forward/reverse toggle switch to facilitate easy commissioning and maintenance
• Reversing motor capability allows for flexible clockwise or counterclockwise rotation configurations
• Disengageable drive shaft and cam drum clutches enable quick manual alignment without power
• Externally visible position indicator providing clear status of the damper or valve orientation
• Low hysteresis gear train with maintenance-free bearings for consistent performance over a long service life

Specifications

• Model: SQM50.260R2A
• Torque: 10 Nm (90 in-lb)
• Running Time: 10 seconds for 90 degree rotation (at 50 Hz)
• Operating Voltage: AC 220 V to 240 V (50/60 Hz)
• Number of Switches: 6 SPDT switches (2 limit, 4 auxiliary)
• Shaft Type: No shaft included (designed for use with AGA58 series exchangeable shafts)
• Protection Rating: IP54 (NEMA 12)
• Approvals: UL recognized, CSA certified, and CE approved

Applications

• Positioning of air and gas dampers in industrial and commercial burner systems
• Control of flow control valves and butterfly valves for precise fuel-to-air ratio management
• Use in applications requiring rotary motion with analog input signals (4-20 mA, 0-10 V, etc.) via optional internal circuit boards
• Integration with Siemens burner controls such as the LMV5 or LME series for automated combustion management