The 1394390000, also known as UR20-4AI-UI-12, is a 4-channel analog input module for acquiring sensor data. It features a 12-bit resolution with an accuracy of 0.1% of the full-scale range and a conversion time of 1 ms. Each channel can be individually parameterized to accept various voltage (e.g., 0-10 V, ±10 V) or current (e.g., 4-20 mA) signals from 2-wire or 3-wire sensors. The module includes reverse polarity protection, module-level diagnostics, and provides power to connected sensors from the input current path. Its flexibility and precision make it well-suited for data acquisition in industrial automation and process control systems.