The closed loop stepper motor 42BG03-EC is a high performance stepper motor with an integrated controller. It has three channels for controlling the speed and direction of the motor, making it ideal for applications that require precise control over the movement of the motor. The motor also features a built-in encoder to provide feedback on the position of the motor, allowing for accurate positioning and tracking. Additionally, the motor is designed for use in harsh environments, making it suitable for applications such as robotics, automotive, and industrial automation.