190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page 23-53
23.12.4 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 Figure 24-2.11
for wiring information. .
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
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