Siemens 6ES7 331-7PF11-0AB0 is an 8-channel analog input module (AI8xTC) for the SIMATIC S7-300, providing isolated thermocouple inputs for temperature measurement. It supports thermocouple types B, E, J, K, L, N, R, S, T, U, and C, offering 16-bit resolution with a 24-bit internal Sigma-Delta conversion. The module’s conversion time is 50 ms, and its analog inputs can be configured online, making it suitable for process-temperature monitoring in industrial control systems. The MLFB 6ES7 331-7PF11-0AB0 identifies it as the SM 331 AI8xTC, designed to plug into a SIMATIC S7-300 rack.
