The Siemens 6ES7231-5PF30-0XB0 is a high-performance analog input module from the SIMATIC S7-1200 series. Designated as the SM 1231 RTD, this module is specifically engineered for precise temperature measurement using resistance temperature detectors (RTDs). It features eight channels, allowing for the connection of various RTD types such as Pt100, Pt1000, and Ni1000, as well as standard resistors. With a high resolution of 15 bits plus a sign bit, it provides accurate and reliable data for demanding industrial automation applications, including process control, climate control, and machine monitoring where temperature is a critical parameter.