6SL3120-2TE21-8AC0 is a frequency converter (in) model from Siemens. It is a member of the Siemens SINAMICS S120 series and has a wide range of applications, suitable for various industrial automation and drive control systems. This model of frequency converter has modular design, high performance, and flexibility, and supports multiple communication interfaces and control methods. It can provide precise speed and torque control, suitable for various motor control needs.