Siemens Combustion SQM48.497B9 Actuator

The Siemens SQM48.497B9 Combustion Actuator is a high-torque, precise electromotoric unit engineered for the accurate positioning of air and gas dampers or oil pressure controllers. As a critical component of LMV5 linkageless burner management systems, this actuator utilizes a stepper motor and steel spur gears to deliver 20 Nm of rated and holding torque. The integrated CAN Bus interface facilitates direct communication and power supply, reducing field wiring complexity while ensuring stable, high-resolution modulation with a 30-second running time for 90°. Built with a die-cast aluminum lower housing and an impact-resistant cover, the SQM48.497B9 supports radial bearing forces up to 420 N. For mechanical coupling, it features a 14 mm hardened steel shaft with a Woodruff key, providing reliable torque transmission in high-demand industrial burner controls and thermal process plants where precision fuel-air ratio control is mandatory for operational efficiency.

Key Benefits for Technicians

• Precise Modulation: Stepper motor technology integrated with the LMV5 system allows for fine-tuned damper adjustments and high reproducibility.
• Industrial Durability: Equipped with permanently lubricated steel spur gears and a hardened steel drive shaft for a long service life in high-cycle environments.
• Simplified Integration: Powered and controlled exclusively via CAN Bus, eliminating the need for external power transformers at the actuator site.
• Flexible Mounting: Features four fixing holes and a positioning pin for face mounting, compatible with butterfly valves and various HVAC dampers.
• High Stability: A 20 Nm holding torque ensures that damper positions remain locked even under significant pressure or air flow resistance.

Common Questions

What burner controls are compatible with the SQM48.497B9?
This actuator is specifically designed for use with Siemens LMV51, LMV52, and LMV5 series linkageless burner management systems using CAN Bus communication.

Does this unit require a separate power supply wire?
No, the SQM48.497B9 receives its 2x12V AC operating voltage directly through the CAN Bus cable, streamlining the installation process.

Can the running time be adjusted?
Yes, while the nominal speed is 30 seconds per 90°, running times and rotation direction are typically selected and configured via the AZL5 display unit on the main burner control.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.