AFS EFIS installation calls for serial 1 to 430W pins 56 and 57. The GTX327 installation calls for pins 2 and 20 to also go to pin 56 and 57. From reading about the serial connections, it is my understanding that you can not have multiple RX connections on pin 57 of the 430W. I can not find any solutions from searching the forums and was wondering how others have wired what seems a common setup.
