Siemens, SIPLUS S7-1200, 6AG1234-4HE32-2XB0, 2 AO, 4 AI, 0 DO, 0 DI, Single-phase, 24 V DC.

The Siemens SIPLUS S7-1200 SM 1234 mixed analog input/output module (model number 6AG1234-4HE32-2XB0) is natively equipped with 4 analog inputs (AI) and 2 analog outputs (AO), alongside 0 digital outputs (DO) and 0 digital inputs (DI). Derived from the standard 6ES1234-4HE32-0XB0 baseline component, it handles differential voltage signals (10 V) and current loops (020 mA / 420 mA) with a precise 13-bit resolution. The module operates within a single-phase control arrangement drawing from a standard 24 V DC voltage supply. This ruggedized variant features a specialized protective conformal coating that defends internal logic circuitry from active biological, chemical, and mechanically corrosive substances, ensuring reliable telemetry processing under harsh condensation and extreme thermal shifts ranging from -40 to +70 C.