Siemens 6ES7231-5PD32-0XB0 Analog Input Module

Siemens 6ES7231-5PD32-0XB0 is a SIMATIC S7-1200 SM 1231 RTD analog input module that provides four RTD inputs for temperature sensing in PLC systems. The 4‑channel module delivers 16‑bit resolution on each RTD input and is suitable for Pt100, Pt1000, Ni100, Ni1000 and other RTD sensors, enabling precise resistance-to-temperature measurements fed to a SIMATIC S7-1200 controller. It is powered from the 24 V DC backplane, drawing about 40 mA and dissipating roughly 1.5 W of power. As part of the SM 1231 RTD family, it integrates with SIMATIC S7-1200 PLCs to monitor multiple process temperatures and provide real‑time temperature data to automation programs, supporting use cases such as process temperature monitoring, HVAC applications, and industrial equipment temperature control.