Here is some information about the module:

Model: 6ES7331-1KF02-0AB0

Product Description: SM 331, 8 AI, 13 BIT RES

AI: Analog Input

Number of Channels: 8

Resolution: 13 bits

Communication Protocol: Profibus DP (distributed I/O network)

This module is designed to interface with analog signals, converting them into digital data that can be processed by the PLC. The 13-bit resolution indicates the precision of the analog-to-digital conversion for each input channel.