Thank you.

Could I only use FDC157-0 only? Without DP/PA Link?

Hi,

On the FAQ How do you set up the DP/PA link and how do you configure the DP/PA link and DP/PA coupler? you can read this:

"Generally, the DP/PA coupler is not configured, but only the interface module of the DP/PA link. The exception is the DP/PA coupler FDC157-0 (article number (formerly order number) 6ES7157-0AC83-0XA0). In standalone mode, the DP/PA coupler FDC157-0 is configured directly on the PROFIBUS DP master system, as are its PROFIBUS PA field devices. If the DP/PA coupler FDC157-0 is operated on a DP/PA link, it is configured on the PROFIBUS PA. Configuring the DP/PA coupler FDC157-0 improves diagnostics."