SQM56.664R1H3R Siemens Damper Motor

Overview

The Siemens SQM56.664R1H3R is a high-torque reversing actuator designed for the precise positioning of air dampers, flow control valves, and butterfly valves. Part of the SQM5 series, this motor is engineered for industrial and commercial burner applications that require a high degree of modulating accuracy and repeatability. It features a robust design capable of mounting in any position and is specifically configured for clockwise rotation when facing the drive shaft.

Features

• High torque output of 400 lb-in for managing large dampers and valves
• Reversing motor functionality allowing for flexible control logic
• Internal auto/manual selector switch for easy adjustment and commissioning
• Externally visible shaft position indicator for quick status monitoring
• Low hysteresis drive mechanism with double-offset gearing for precision
• Adjustable internal switches (typically 2 limit and 4 auxiliary) for sequence control
• Field-exchangeable circuit boards and potentiometers for versatile integration

Specifications

• Model: SQM56.664R1H3R
• Operating Voltage: 110-120 VAC (50/60 Hz)
• Torque: 400 lb-in (45 Nm)
• Running Time: 50 seconds for 90 degree rotation (at 60 Hz)
• Control Input: 0 to 135 Ohm (modulating)
• Rotation Direction: Clockwise (CW)
• Shaft Type: 3/8 inch square, dual-ended
• Angular Rotation: Up to 160 degrees (factory set for 90 degrees)
• Operating Temperature: -4 F to 140 F (-20 C to 60 C)
• Protection Rating: NEMA 1, 2, 3, 3R, 4, 12 and IP54

Applications

• Positioning of air dampers in industrial burner systems
• Control of fuel-to-air ratio on large commercial boilers
• Operation of flow control and butterfly valves in HVAC systems
• Industrial process heating applications requiring precise modulation
• Replacement for competitive actuators in existing burner management setups