I am installing 2 5600's and 1 5500 in a RV10 and was wondering about RS232 inputs. One for example would be the carbon monoxide warning to display on the EFIS instead of using the LED warning light. I know this can be done using a switched input or RS232 but does it matter what EFIS it is hooked up to. All three screen swill be connected via ethernet hub.

There are not enough inputs on the main EFIS so wanted to use the ones open on the Co-Pilot EFIS and if I do, will the warnings show up on both pilot and co-pilot screens.

Thanks
Brian