Siemens 6ES7 231 7PC22 0XA0 Analog Input Module

Siemens 6ES7231-7PC22-0XA0 EM 231 is a four-channel RTD analog input module for the SIMATIC S7-200 family (S7-22X CPUs), providing four RTD input channels for direct resistance-temperature measurements. It supports Pt100, Pt200, Pt500, Pt1000, Pt10000, Ni100, Ni120, Ni1000, and Cu10 RTD sensors, with selectable input resistances of 150, 300, or 600 ohms and a 15‑bit conversion with sign. This module integrates with the S7-200 analog input architecture to enable precise temperature monitoring across multiple measurement points in automation and process-control applications, including HVAC, manufacturing lines, and instrumentation setups. The 0XA0 variant identifies the EM231 RTD input configuration used to extend RTD sensing in compatible S7-200 systems and is intended for use with S7-22X CPUs.