Siemens Simatic S7-1500 Analog input module, 16 bitProduct Overview The 6ES7531 7KF00 0AB0 is a SIMATIC S7 1500 analog input module AI 8xU I RTD TC ST with 16 bit resolution and 0. 3% accuracy. This versatile 8 channel module supports voltage, current, RTD, and thermocouple measurements with 4 dedicated channels for RTD measurement, 10V common mode voltage, comprehensive diagnostics, and hardware interrupt capabilities for demanding industrial measurement applications. Key Features Input Channels: 8