6ES7321-7TH00-0AB0 module is typically used in industrial automation and control systems, in conjunction with the S7-300 series main PLC, for collecting and processing analog signals.
Through this module, you can connect the output of analog sensors to the PLC system and achieve monitoring and control of these signals.
6ES7331-7TF01-0AB0 "is a Siemens product belonging to the S7-300 series of digital input/output modules.
It is typically used in industrial automation and control systems, in conjunction with the S7-300 series main PLC, for connecting and controlling digital signals from external devices.
