This tab appears, if you add a module that receives data from an external device, for example:
After you have added the module, the categories and settings of this tab appear in the Properties view, if you select the module in the Tree view. Use them to view and edit the settings for connections that handle incoming data.
To establish a connection between the module and the source of the incoming data, specify the connection type used to perform the communication.
Depending on the choice of the connection type, the settings of the Connection Settings sub-category vary.