190-01115-01
G3X/G3X Touch Installation Manual - LRU Pinouts
Rev. AC
Page 25-51
25.11.4 RS-232 CHANNEL
The RS-232 outputs conform to EIA Standard RS-232C with an output voltage swing of at least ±5 V
when driving a standard RS-232 load.
RS-232 TX 1 is always configured to provide Garmin ADS-B+ data (at 9600 baud), to be used by a Mode
S Extended Squitter (ES) transponder.
RS-232 TX 2 is always configured to provide NMEA 0183 data out at 9600 baud, 1 start bit, 1 stop bit, 8
data bits, and no parity. The supported NMEA sentences are GPRMC, GPGGA, GPGSA, GPGSV,
GPVTG, and PGRMT.
See
Pin Name
Connector
Pin
I/O
RS-232 RX 1
J201
4
In
RS-232 TX 1
J201
5
Out
RS-232 TX 2
J201
3
Out