System Overview; G3X Interconnect Example - Garmin GDU 370 Installation Manual

1.3 System Overview

The G3X is an advanced technology avionics suite designed to integrate pilot/aircraft interaction into one
central system. The system combines primary flight instrumentation, aircraft systems instrumentation,
and navigational information, all displayed on one, two, or three color screens. The G3X system is
composed of several sub-units or Line Replaceable Units (LRUs). LRUs have a modular design and can
be installed directly behind the instrument panel or in a separate avionics bay if desired. This design
greatly eases troubleshooting and maintenance of the G3X system. A failure or problem can be isolated
to a particular LRU, which can be replaced quickly and easily. Each LRU has a particular function, or set
of functions, that contributes to the system's operation. For additional information on LRU functions, see
the applicable section of this manual.
1.3.1 System Architecture
Figure 1-1 illustrates an example block diagram of a G3X installation. The flexibility of system allows
the installer to determine the architecture that best fits each installation.
Config Module
Autopilot
RS-232
A429
RS-485
GMU 44
RS-232
GTP 59
Config Module
GNS
430(W)
Page 1-2
Revision A
SL 30/40
ELT
(1, 2)
RS-232
RS-232
GDU 37X (PFD1)
CAN
GSU 73
GNS
A429 (AIR DATA)
430(W)
(1) RS-232
Figure 1-1. G3X Interconnect Example
GMA 240
STEREO/MONO AUDIO
GDU 37X (MFD)
RS-232 RS-232
GTX 330
RS-232
Notes:
(1) Maximum of 2 COM/NAV units installed.
(2) GDU 37X to SL40 is TX only.
(1)
G3X Installation Manual –Installation Overview
GDU 37X (PFD2)
190-01115-01