Not sure about the ARNAV 5200 MFD, but can say that the Apollo 2001 NMS outputs via RS-232 at 9600 baud. Can provide copies of relevant pages from installation manual including pin-outs and configuration info if needed. I have hooked mine up to a moving map running on my pc and it worked as expected. Dave
 
Arnav / 2001 NMS

David,
Thanks for the reply. I had not checked back in for awhile, but I am still working on this project. I would be greatful for the information you have. If you can email it to [email protected] I would appreciate it.
Ace