Why have RS 232 *and* can bus?

[Nathan Miller]

Interfacing GNX 375 GPS/Transponder with G5 -

Obviously, I will wire it up as the manual says, but I'm curious about something -

The G5 install manual says the G5 will receive nav data on the can bus from the GAD 29B. Yet, a paragraph or two earlier, it says it will receive GPS data for aiding along RS-232... Why both? Redundancy? Separation of power? Checks and balance? ...oh, wait, those last two are something else that's failed these days...

 

[asicer]

 

[Nathan Miller]

lol

well played

 

[Jesse Saint]

RS232 sends some data that ARINC429 doesn’t and vice versa. The GAD29 converts the ARINC429 signal to a format the G5 can read.