Siemens, SIPLUS S7-1200, 6AG1231-5QD32-4XB0, 0 DO, 0 DI, 0 AO, 4 AI, Single-phase, 24 V DC.

The Siemens SIPLUS S7-1200 SM 1231 TC analog input expansion module (model number 6AG1231-5QD32-4XB0) features 4 analog inputs (AI) specifically optimized for thermocouple sensor telemetry, alongside 0 digital outputs (DO), 0 digital inputs (DI), and 0 analog outputs (AO). Built upon the standard 6ES7231-5QD32-0XB0 baseline component, it processes high-precision thermal profiles using a 15-bit plus sign resolution across multiple thermocouple types (such as J, K, T, E, and R/S). It operates within a single-phase architecture drawing from a standard 24 V DC voltage supply. This expansion card is treated with a specialized environmental conformal coating to defend internal components against atmospheric condensation and active industrial contaminants across an operating temperature range of -20 to +60 C.