190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page 2-12
2.1.1.17 Traffic
The G3X system supports a variety of airborne traffic data sources:
ADS-B traffic data can be provided by a GDL 39R receiver using the same connection method used for
FIS-B weather data.
A G3X Touch system with GDU 4XX displays can receive traffic data from a GDL 52R dual ADS-B/
SXM receiver through the same connection method used for FIS-B weather data.
A G3X Touch system with GDU 4XX displays can receive ADS-B traffic data from GTX 45R and
GTX 345/345R transponders using the same RS-232 connection used for FIS-B weather data. These
transponders can also simultaneously provide ADS-B traffic data to a GTN or GNS WAAS navigator. The
legacy G3X system with GDU 37X displays does not support ADS-B traffic data from GTX transponders.
The GTS™ 8XX traffic system is compatible with the G3X system. The GTS interface to the G3X system
requires an RS-232 connection to a GDU display. TCAS-capable GTS 8XX units also require a separate
data connection to the GTX transponder.
TIS-A traffic data can be provided by GTX 23ES, 33, 330, and GTX 335/335R transponders. Traffic data
is provided to the G3X system using the CAN bus from the #1 ADAHRS unit, to which the transponder is
connected.
Traffic data from various third-party devices that emulate the Garmin TIS-A format is supported using an
RS-232 connection from the traffic device to a GDU display.
For any of the above data sources, traffic data is shared between GDU displays using the CAN bus. If
multiple sources of traffic data are available, the best source is selected automatically. Refer to the Pilot’s
Guide for further information on traffic data source selection.
In an installation that includes a GTN/GNS navigator and transponder with ADS-B or TIS-A traffic
capability, traffic data is provided to the GTN/GNS through an ARINC 429 or HSDB (High Speed Data
Bus) connection. For further information, refer to Section 24
and the transponder installation manual.
2.1.1.18 Electrical System
The G3X system supports a variety of connections to the aircraft’s electrical system:
Most important LRUs support dual power inputs, allowing them to be powered from separate dual
electrical busses. Alternatively, one of the power inputs may be connected to a backup battery to provide
adequate electrical power supply in the event of alternator failure, or during engine start. Backup batteries
designed for the G3X system are available from third-party suppliers, or a backup battery can be integrated
into the aircraft’s electrical system design in order to power additional devices.
In a G3X Touch system with GDU 4XX displays, the GAD 27 electrical control system provides low-
voltage protection during engine start, as well as control of the flaps, trim, external lighting, and cockpit
lights. The GAD 27 is not compatible with legacy G3X systems that use GDU 37X displays. For further
GAD 27 installation information, refer to Section 3
and Section 24.
If the aircraft is equipped with a cockpit light dimming system, the GDU displays and various other
Garmin panel-mount avionics support connection to the dimming bus to control display brightness.
The G3X system is compatible with Vertical Power products through an RS-232 connection to a GDU
display. For further information on interfacing Vertical Power products to the G3X system, consult the
manufacturer.
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