Siemens 6ES7231-7PD22-0XA0 Analog Input Module (EM 231) adds four thermocouple-input channels to a SIMATIC S7-200 system, enabling precise temperature monitoring across multiple points. The PD22 variant supports thermocouple types J, K, S, T, R, E, and N with a ±80 mV signal range per channel and outputs data in a 15‑bit signed format for reliable conversion by S7‑200 CPUs (S7‑22x). Designed for use with the S7‑200 family, this compact four-channel analog input module expands your measurement capability without changing the controller architecture.
