SQM50.481R1Z4R Siemens Motor

Overview

The Siemens SQM50.481R1Z4R is a high-precision, reversing rotary actuator designed for the modulating control of air dampers, gas dampers, and fuel-air ratio control in industrial and commercial burner applications. Part of the robust SQM5 series, this 120V proportional motor is engineered for accuracy and repeatability, featuring a reversible clockwise rotation and an integrated potentiometer for precise position feedback. Its durable construction and flexible mounting options make it a reliable choice for maintaining optimal climate conditions and efficient combustion in HVAC and boiler systems.

Features

• Reversing actuator capability for flexible control of air and gas dampers
• High modulating accuracy and rotational resolution with low hysteresis
• Equipped with eight easily accessible internal auxiliary switches for complex control sequences
• Integrated auto/manual selector switch and manual forward/reverse toggle for easy field adjustments
• Externally visible position indication for quick status monitoring
• Field exchangeable drive shafts to accommodate various mounting requirements
• Robust design suitable for mounting in any orientation

Specifications

• Model: SQM50.481R1Z4R
• Voltage: 120V AC (50/60 Hz)
• Torque: 140 lb-in
• Running Time: 25 seconds @ 60 Hz (30 seconds @ 50 Hz)
• Number of Switches: 8
• Shaft Type: 10mm diameter shaft
• Potentiometer: 1000 Ohm, 135-degree rotation
• Rotation: Clockwise (field reversible)
• Control Inputs: Proportional/Modulating (supports various analog signals)
• Power Consumption: Approximately 20VA

Applications

• Precise positioning of flow control valves and butterfly valves in burner systems
• Control of air and fuel dampers for optimal combustion air-to-fuel ratios
• Use in large industrial and commercial HVAC systems for airflow regulation
• Integration with Siemens burner controls and flame supervision systems
• Suitable for high-demand applications requiring high repeatability and modulating accuracy