I just bought an used GTX330ES transponder and put it in the slot of the old GTX330. It works fine, but ADS-B out does not work, because no GPS-position is received from the IFD (still no cable). I do not find any documentation in the internet for the GTX330ES, only GTX330 (no ADS-B out). I want to interconnect the IFD540 to the GTX330ES via RS-232 for the GPS. I do not need WX or TIS, because in Europe is no WX/TIS via ADS-B available. I have ADS-B in with a TRX1500A with a AIRINC 429, which works fine on the IFD, so I do not need a GTX345. I just want to know, what I have to config in the IFD540 (ADSB+?) and what to config on the GTX330ES? I want to use a RS-232, because there is no AIRINC-out  free on the IFD540. I already checked to forum to page 50 and found nothing for the GTX330ES, only for GTX345, which seems to be different. I think, I just need one cable from the IFD RS-232-out to the RS-232-in from the GTX 330ES for the WAAS GPS Position and no "return", because I just want GPS-date from the IFD540 for the ADS-B out for the GTX330ES.

Another question is, is there an audio pin on the IFD which sends the traffic-and airspace warning aural to the intercom (the intercom has a "warning audio in port)? These "yellow warnings" right down in the corner, will these warnings send via this "special-audio-port"?

Many thanks in advance and greetings from Germany and stay healthy.....