The Siemens SM 1231 PLC analogue I/O module has 4 integrated RTD inputs with a signal range of (0)4 to 20mA. It is designed for use with SIMATIC S7-1200 series PLCs. It receives analogue input in the form of current or voltage. It has various advanced features like alarms and diagnostics that make it an ideal expansion module for various applications. This device is for use with CPU 1211, CPU 1212, CPU 1214.
SIMATIC S7-1200, Analogue input, SM 1231 RTD, 4 analogue inputs RTD module (Pt100/Pt1000)