Connect 1 (or 2) switch(es) to the SDC

Hello,


I'd like to connect one (if possible two) switches to the SDC2130 that can be read from the program

• • Simple ON OFF switches handled externally/manually
• • Status has to be read from the program (written in C++ if that matters)
• • Tentative query commands would be ?AI, ?DI, ?FS, ?PI in my opinion, but please let me know what the SDC2130 is capable of
• • Ideally, the change of status of a switch would trigger an interruption in the program - but reading the doc it doesn't seem possible

Where should I connect the switch(es)?
What command to query the status of the switch(es)? (polling)

Thank you