Siemens 6ES7531-7QD00-0AB0 SIMATIC S7-1500 AI 4xU/I/RTD/TC ST analog input module, 16-bit resolution, 0.3% accuracy, 4 channels in groups of 4; 2 channels for RTD measurement; 10 V common mode voltage; diagnostics; hardware interrupts; delivery includes push-in front connector, input element, display holder and display terminal