SQM50.264R2A Siemens Damper Motor

Overview

The Siemens SQM50.264R2A is a high-precision reversing damper motor designed for the accurate positioning of air and gas dampers, flow control valves, and other rotary motion applications. Part of the SQM5 series, this electromotive actuator is engineered for industrial and commercial burner systems, providing reliable performance in modulating or three-position control loops. It features a robust design with a die-cast aluminum housing and impact-resistant plastic covers, ensuring durability in demanding environments.

Features

• Internal and external position indication for easy monitoring
• Drive shaft and camshaft can be disengaged separately via manual clutches for quick alignment
• Equipped with two limit switches and four internal auxiliary switches for versatile control configurations
• Reversible synchronous motor protected against locking
• Maintenance-free gearwheels and bearings for reduced operational costs
• Adjustable switching points via rotating cams with angle scales
• Built-in auto/manual selector and manual forward/reverse toggle switches

Specifications

• Model: SQM50.264R2A
• Operating Voltage: 220-240 VAC (50/60 Hz)
• Torque: 90 in-lbs (10 Nm)
• Running Time: 8 seconds for 90 degrees at 60 Hz (10 seconds at 50 Hz)
• Switch Configuration: 6 SPDT switches (2 limit, 4 auxiliary)
• Shaft Type: 3/8 inch square, dual-ended
• Rotational Direction: Clockwise (CW) when facing the gear end
• Protection Rating: IP54 (when used with appropriate cable glands)
• Agency Approvals: UL recognized, CSA certified, and CE approved

Applications

• Precise control of combustion air and fuel dampers in oil and gas burners
• Positioning of butterfly valves and flow control valves in HVAC systems
• Industrial process heating applications requiring high modulating accuracy
• Replacement of competitive actuators using versatile mounting brackets and shafts