Siemens 6ES7231-5QA30-0XB0 Programmable Logic Controller CPU Module

Siemens 6ES7231-5QA30-0XB0 is a SIMATIC SB 1231 thermocouple signal board for the SIMATIC S7-1200 system. It provides 1 analog input channel for thermocouples (types J, K, T, E, R/S, B, N, C, TXK/XK(L)) and is used to capture precise temperature readings within automation projects. The module is powered from the backplane with a 24 V DC supply, drawing about 5 mA; backplane bus provides 5 V DC (typical) with up to 20 mA, and a typical power loss of 0.5 W. The analog input accepts thermocouple signals with an input range up to ±80 mV and a destruction-limit input voltage of ±35 V for current or voltage inputs; input resistance for the thermocouple range is ≥1 MΩ. Temperature measurement units are configurable in degrees Celsius or Fahrenheit. As part of the SIMATIC S7-1200 signal-board family, this expansion is intended for temperature sensing in industrial processes, HVAC, and equipment monitoring where a compact, single-channel thermocouple input is integrated alongside the PLC backplane.