190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page 2-3
2.1.1.1 Displays
The foundation of a G3X system is one or more GDU display units. A GDU display is configured with
wiring connections as either a primary flight display (PFD) or multi-function display (MFD), with options
for arranging display layouts and combining different types of data on a single display. In the event that
power is removed from a GDU display, important flight data can still be accessed on the remaining
display(s).
A legacy (non-Touch) G3X system can have between one and three GDU 37X displays. Figure E-2
shows
some of the various interface options for a GDU 37X-based system. For GDU 37X installation
information, refer to Appendix E
.
A G3X Touch system can have between one and six GDU 4XX displays, with any combination of 10.6”
(GDU 46X) and 7” (GDU 45X or GDU 470) display sizes. Figure 2-1 shows some of the various interface
options for a GDU 4XX-based system. For GDU 4XX installation information, refer to Section 6
.
NOTE
GDU 37X and GDU 4XX displays may not be combined in the same system.
A G3X system can have up to two G5 standby flight displays. For G5 installation information, refer to the
G5 installation manual (190-02072-01).
GDU displays communicate with other LRUs using the CAN bus (with optional RS-232 backup paths
supported for some LRUs) and with other devices using RS-232.
A G3X Touch system installed with no ADAHRS units can display MFD data, including engine
information, on up to six GDU 4XX displays. This system configuration can also support Garmin autopilot
functionality when paired with one or more G5 flight displays.
A single GDU display, installed without any other G3X system components, may be configured as a
standalone MFD. A standalone GDU 37X MFD does not support flight or engine instruments, or advanced
interface capabilities, and is intended for applications where only basic mapping and navigation features
are required.
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