06-23-2009 04:36 PM
If you are trying to detect whether the relay is open or closed, then yes, you could use the relay contacts between CTS and serial ground (double check this) to detect whether the contacts or open or closed.
I don't understand the serial number part. I don't know how you are trying to read its serial number based on a single CTS binary input.
06-23-2009 04:54 PM