Siemens Actuator Servomotor SQM45 / SQM48 Series

Siemens Actuator Servomotor SQM45 / SQM48 Series

Siemens Actuator Servomotor SQM45 / SQM48 Series are electromotoric actuators designed to drive and control air dampers, gas dampers, butterfly valves, and oil pressure controllers in medium- to large-capacity oil and gas burner systems. They are also suitable for industrial thermal process applications.

The actuators feature stepper motors and low-backlash gear trains, offering a positioning resolution of 0.1°, torque ratings from 3 to 35 Nm depending on the model, and a maximum rotation angle of 90°. They operate in conjunction with the Siemens LMV5 burner control system through CAN bus communication for position control and feedback, allowing the burner system to regulate fuel and combustion air according to burner load requirements.

Key Features of Siemens SQM45 / SQM48

• Stepper motor technology for precise rotary positioning

• Torque ratings from 3 to 35 Nm, depending on the model

• Running times of 10–120 seconds for 90° rotation, depending on the model and configuration

• Maximum rotation angle of 90° with 0.1° positioning resolution

• CAN bus communication for position control and feedback with Siemens LMV5

• Configurable rotation direction and limit positions through the basic control unit

• Low-backlash gear train with permanent lubrication

• IP54 protection rating when installed according to manufacturer specifications

Available Siemens SQM45 / SQM48 Models

• SQM45.291B9 – Maximum output torque of 3 Nm, minimum 90° running time of 10 seconds, drive shaft type No. 1

• SQM45.295B9 – Maximum output torque of 3 Nm, minimum 90° running time of 10 seconds, drive shaft type No. 5

• SQM48.497B9 – Maximum output torque of 20 Nm, minimum 90° running time of 30 seconds, drive shaft type No. 7

• SQM48.697B9 – Maximum output torque of 35 Nm, minimum 90° running time of 60 seconds, drive shaft type No. 7

Applications of Siemens SQM45 / SQM48

Siemens SQM45 / SQM48 actuators are suitable for controlling air dampers and fuel-regulating devices in oil and gas burners, industrial boiler systems, butterfly valve applications, and industrial thermal processes. When integrated with Siemens LMV5, they support electronic fuel/air ratio control for load-dependent combustion regulation.

Selection Considerations: Before selecting or replacing an actuator, verify the model number, required torque, running time, drive shaft configuration, and compatibility with the Siemens LMV5 control system. Addressing and bus termination settings must also be checked and configured according to the manufacturer's instructions.

Siemens SQM45 / SQM48 Series are electromotoric actuators designed for precise positioning of control components in industrial burner systems. They feature stepper motors and low-backlash gear trains, providing a positioning resolution of 0.1°. CAN bus communication enables position control and feedback in conjunction with the Siemens LMV5 burner control system.

The SQM45 provides a maximum torque of 3 Nm, while the SQM48 provides up to 20 Nm and the SQM48.6 version delivers up to 35 Nm. These actuators are suitable for air dampers, butterfly valves, and fuel-flow regulating devices in oil and gas burner applications. Rotation direction, running time, and limit positions can be configured through the basic control unit, supporting electronic fuel/air ratio control.