SQM56.687A2 Siemens Damper Motor

Overview

The Siemens SQM56.687A2 is a high-torque electromotive actuator designed to drive air and gas dampers in medium to large capacity oil and gas burners. This reversing actuator provides precise, load-dependent control of gas flow, oil volume, and combustion air volume. Engineered for durability, it features a reversible synchronous motor and a modular design that allows for the integration of various electronic modules for control and position feedback, making it a versatile component for complex burner management systems.

Features

• Reversible and locking-proof synchronous motor for reliable operation
• Internal and external position indication for easy monitoring
• Eight auxiliary switches for flexible control configurations
• Separately disengegable drive shaft and camshaft for manual adjustment
• Durable housing with die-cast aluminum sections and impact-resistant plastic covers
• Support for multiple drive shaft designs to fit specific application needs
• Field-reversible rotation direction (clockwise or counterclockwise)

Specifications

• Model: SQM56.687A2
• Operating Voltage: AC 220 V – 240 V (50/60 Hz)
• Rated Torque: 40 Nm (approx. 350 in-lbs)
• Running Time: 60 seconds for 90 degrees / 87 seconds for 130 degrees
• Number of Switches: 8 (two limit switches and six auxiliary switches)
• Shaft Diameter: 14 mm (ordered separately or variant-specific)
• Protection Rating: Designed for IP54 (depending on mounting)
• Weight: Approximately 9.0 lbs (4.1 kg)

Applications

• Load-dependent control of combustion air, fuel oil, and gas flow in industrial burners
• Used in conjunction with 3-position or modulating controllers (e.g., 4 to 20 mA)
• Integration into burner controls for automated sequence management
• Suitable for large-scale HVAC systems, boiler plants, and industrial thermal processing equipment
• Replacement for legacy actuators in modernized burner control trains