SQM50.461R1A Siemens Damper Motor

Overview

The Siemens SQM50.461R1A is a high-precision reversing actuator designed for the accurate positioning of air dampers, flow control valves, butterfly valves, and other components requiring rotary motion. Engineered for industrial and commercial burner applications, this electromotive actuator provides reliable load-dependent control of gas, oil, and combustion air volumes. Its robust design features a die-cast aluminum housing and impact-resistant plastic covers, making it suitable for demanding environments where modulating accuracy and repeatability are critical.

Features

• Reversible synchronous motor ensures locking-proof operation and consistent performance.
• Internal position indication with scales adjacent to cams for easy switching point adjustment.
• Disengagement clutches allow for manual alignment of the drive shaft and camshaft independent of the gear train.
• Maintenance-free gearwheels and bearings contribute to a long operational lifecycle.
• Field-reversible rotational direction for flexible installation options.
• Includes two limit switches and up to four internal auxiliary switches for complex control sequences.
• Auto/manual selector switch and forward/reverse toggle switch for convenient manual override.

Specifications

• Model: SQM50.461R1A
• Operating Voltage: 110V – 120V AC (50/60 Hz)
• Torque: 140 lb-in (16 Nm)
• Running Time: 25 seconds for 90 degrees at 60 Hz (30 seconds at 50 Hz)
• Shaft Type: 10 mm round, single-ended
• Rotational Direction: Counter-clockwise (CCW) standard, field reversible
• Protection Rating: NEMA 1, 2, 3, 3R, 3S, 5, 12, 13 (IP54 equivalent)
• Operating Temperature: -5 F to 140 F (-15 C to 60 C)

Applications

• Load-dependent control of gas and oil flow in medium to large capacity burners.
• Precise positioning of air and combustion dampers in HVAC systems.
• Integration with 3-position or modulating controllers (e.g., 4-20 mA) for automated burner management.
• Replacement of competitive actuators in existing industrial burner configurations using various mounting brackets.
• Use in dual-fuel applications to establish separate high fire, low fire, and ignition positions.