Siemens 6ES7231-5QA30-0XB0 Analog Input Module

The Siemens 6ES7231-5QA30-0XB0 is a compact analog input module (SB 1231 TC) for the SIMATIC S7-1200 family, providing a dedicated single AI thermocouple input channel for direct temperature sensing in PLC-based automation. It uses the SB 1231 TC signal board to accept thermocouple signals, with support for Type J or Type K thermocouples, a voltage range of -80 mV to +80 mV, and an input impedance of at least 1 MΩ, while the temperature measurement units can be configured in Celsius or Fahrenheit. Designed for SIMATIC S7-1200 controllers, this module enables precise, scalable temperature monitoring in industrial applications such as process control, energy management, and laboratory instrumentation where a single thermocouple input is required.