The SQM40.241A21 is a model of Siemens servo motor, specifically a damper actuator servo motor. Siemens offers a variety of servo motors for industrial applications, and the SQM40 series is commonly used for controlling the position and movement of dampers in heating, ventilation, and air conditioning (HVAC) systems.

Here are some general characteristics and features of the SQM40.241A21 servo motor:

1. Motor Type: The SQM40.241A21 is a brushless servo motor, known for its efficiency and long service life.

2. Power and Torque: The motor's power and torque ratings may vary, depending on the specific model and application requirements.

3. Communication: The motor may be equipped with communication interfaces such as Modbus or BACnet, allowing for integration into building automation systems.

4. Control Signals: The servo motor typically receives control signals, such as 0-10VDC or 4-20mA, to regulate the position and movement of the damper it is connected to.

5. Position Feedback: The SQM40.241A21 servo motor may have built-in position feedback capability, allowing it to provide accurate positioning and control.

6. Mounting: The motor is designed to be mounted directly on the damper or on a damper control assembly, providing a compact and integrated solution.