I have this serial-usb box currently hooked up to some hardware: http://sine.ni.com/nips/cds/view/p/lang/en/nid/14582 , why would I not just nix the box and go straight to the pc with a serial to usb cable? I came in to this project after all of this has been set up and I don't get why the previous engineer did it this way. He wrote a custom program to parse the data as well, instead of using the NI VISA blocks, or the serial communication.
Alternatively, I have a voltage conversion table for my serial communicating device, and an ni BNC style daq, can I wire a bnc to pin 3 on the serial port and get my information to the daq that way?