Siemens 6ES7331-7KB02-0AB0 is a two-channel analog input module (AI) for SIMATIC S7-300 systems, delivering 12- to 14-bit resolution per channel. It belongs to the SM 331 family and plugs into the backplane bus of a SIMATIC rack to digitize signals from connected sensors for PLC processing. With two independent analog inputs offering 12–14 bit performance, it's suited for precise measurement of process variables in industrial automation and data acquisition applications, integrating with Siemens PCS7/SIMATIC controllers in modular I/O configurations.
