Siemens 3RK1903-0AA00 Terminal module

The terminal module, also known as connection module, clamp module or interface module, with type number 3RK1903-0AA00 from Siemens is an electrical module for extending and connecting switching devices or control systems. It has the dimensions 20 x 5 x 15 cm and weighs 0.3 kg. Typical applications are found in automation technology, mechanical engineering, and building technology, where they simplify wiring and improve system integration. They are often used for the flexible connection of sensors, actuators, and other field devices to central controllers.