Siemens 6ES7231-7PB22-0XA0 Analog Input Module

The Siemens 6ES7231-7PB22-0XA0 analog input module for SIMATIC S7-200 (EM 231) provides two analog input channels for interfacing RTD and resistance-type sensors with a PLC. It supports RTD types Pt100/Pt200/Pt500/Pt1000/Pt10000, Ni100/120/1000, Cu10, and direct resistance inputs, with selectable measurement ranges of 150, 300, or 600 ohms and a 15-bit plus sign resolution. Compatible with SIMATIC S7-200 CPUs in the S7-22x series, it mounts in a PLC rack or as an expansion module, with dimensions approximately 71 × 80 × 62 mm and a weight around 0.16–0.21 kg. Common applications include process control, temperature monitoring, and industrial automation panels in manufacturing equipment, building automation systems, water treatment facilities, and energy management systems for accurate monitoring and control of analog field signals. This part is listed as discontinued / spare part (end of support). Common replacements: 6ES7231-7PC22-0XA0, 6ES7231-7PD22-0XA0, 6AG1231-7PB22-2XY0.