A  !non-embedded! Falcon 50EX below serial number ____ has 9 pin DEEC download ports.  Not the same as a F50…Not the same as a 900…not the same as a F50EX with embedded interface.  and no, yo cannot just take the upper cowl off and download directly from the DEEC.

 

A decade ago, Honeywell was able to provide the 9 – pin adapter . for $1800.00 and 6 months lead.  Good luck even getting the part number now.

Here is what we worked out after much trial and tribulation! Thanks Marcus!

 

CAUTION: pin 1 orientation on the RJ12 end is to the left when the tab is held down.  You may have a similar !!!! or !!!! reverse cable end.  WIre to the pin positions, not the colors.