Garmin G3X Installation Manual page 743

Annunciator Outputs
The GEA 24 and GSU 73 have two discrete output pins, which can be used to drive external indicator
lamps. These outputs are optional and do not require any configuration.
DISCRETE OUT 1 acts as a Master Warning annunciator, and is active (pulled low) any time a warning-
level (red) alert is displayed on the PFD.
DISCRETE OUT 2 acts as a Master Caution annunciator, and is active (pulled low) any time a caution-
level (yellow) alert is displayed on the PFD.
See Figure 27-2.2 and Figure 27-3.2 for guidance on wiring indicator lamps to the annunciator output pins.
If two EIS LRUs are configured, connect indicator lamps to EIS LRU #1 only.
Engine Power
Estimated engine power can be calculated for Lycoming and Continental engines, using inputs from RPM,
manifold pressure, and fuel flow sensors (all three all required for engine power calculation).
On the Engine Power Configuration page, select the appropriate engine type (Lycoming or Continental,
turbocharged or normally-aspirated). Then enter the engine's maximum rated power and RPM (for
example, 180 horsepower at 2750 RPM). For a turbocharged engine, enter the manifold pressure for
maximum rated power. Configuring maximum manifold pressure is not required for a normally-aspirated
engine, as it is assumed to produce maximum power at sea level pressure. Select "FADEC" to display
power information from a FADEC engine.
190-01115-01 G3X/G3X Touch Install Manual - GDU 45X/46X Config and Post Install Checkout
Rev. AA Page 32-148