SQM50.481R1Z4 Siemens Motor

Overview

The Siemens SQM50.481R1Z4R is a high-performance reversing motorized actuator designed for the precise positioning of air and gas dampers, as well as flow control and butterfly valves. Part of the industrial-grade SQM5 series, this electromotive actuator is engineered for modulating control in burner and boiler applications. It features a robust design with die-cast aluminum housing and a synchronous motor, providing reliable operation and a high degree of repeating accuracy for demanding HVAC and combustion systems.

Features

• Reversing capability allows for flexible modulating control of air and fuel dampers
• Equipped with a field-exchangeable circuit board providing multi-input/output capabilities and electronic linearization
• Features eight internal, easily accessible switches including limit and auxiliary switches
• Includes a manual auto/manual toggle switch and internal/external position indication for simplified commissioning
• Disengagement clutches allow for separate adjustment of the drive shaft and camshaft
• Durable construction with heat-resistant plastic covers and impact-proof housing

Specifications

• Model: SQM50.481R1Z4R
• Operating Voltage: 110-120 VAC (50/60 Hz)
• Torque: 140 in-lb (15 Nm)
• Running Time: 25 seconds for 90 degrees (at 60 Hz) / 30 seconds (at 50 Hz)
• Rotation: Clockwise (CW)
• Rotational Angle: 135 degrees
• Shaft Type: 10mm round shaft with key
• Control Signals: Supports 4-20 mA, 0-135 Ohm, 0-10 VDC, and floating control
• Protection Rating: IP54 (with appropriate cable glands)

Applications

• Precise modulation of air dampers and gas valves in industrial and commercial burner systems
• Positioning of butterfly valves for fuel-air ratio control
• Use in HVAC systems requiring high-torque rotary motion for flow control
• Integration with Siemens burner controls such as the LMV5 or LME series for automated combustion management