The RB200 series rotary joint module is a highly integrated design that combines technologies such as drivers, dual hollow encoders, frameless motors, harmonic reducers, and sensors. Its core components are independently developed, and it has overcome core technologies such as high power density/torque, high-precision dual hollow encoders, high-precision torque control, and high-reliability load inertia identification. Build a modular, lightweight, low-cost and high-performance product system, provide one-stop solutions, make robot research and development simpler and the use of automated equipment more convenient.