The Siemens 6ES7331-7PF11-0AB0 is a versatile analog input module from the SIMATIC S7-300 series, designated as SM 331. It is engineered to provide high-precision analog signal conversion for a wide array of industrial automation applications. This module features 8 galvanically isolated analog inputs, capable of measuring voltage, current, and signals from thermocouples and resistance thermometers (RTDs), as well as direct resistance values. With a resolution of up to 16 bits (15 bits + sign for temperature measurements), it ensures accurate data acquisition. The module also incorporates diagnostic functions and alarm capabilities for enhanced system reliability and requires a 40-pole front connector for integration.