Garmin Software Version 0321.23 Manual descargar pdf (Pagina 39)

G1000 System Maintenance Manual – Diamond DA40/40F Page 2-13

190-00545-01 Revision G

2.6 Electrical Power Distribution

Distribution of power to the G1000 occurs on three buses:

Essential Bus:

The ‘Essential’ bus is tied directly to the aircraft battery via the master switch. When the

master switch is turned on, power is immediately supplied the ‘Essential’ bus. The ‘Essential’ bus is tied

via a relay switch to the ‘Main’ aircraft bus. There are two circuit breakers on either side of the relay,

combined with a single diode, allowing the battery to be charged by the alternator. Only equipment

deemed essential for safe flight is connected to this bus.

Main Aircraft Bus:

The ‘Main’ bus receives power from the aircraft battery when tied to the ‘Essential’

bus. After the aircraft engine is started, the alternator supplies power to the aircraft ‘Main’ bus, and to the

rest of the system. In the event of an alternator or other power failure, the ‘Essential’ bus can be isolated

with the ‘Essential Bus’ switch. This causes the ‘Essential’ bus to revert to battery power. Only the MFD

receives power from the ‘Main’ bus.

Main Avionics Bus:

A ‘Main Avionics’ bus is tied to the ‘Main’ aircraft bus via the ‘Avionics Master’

switch and switch relay. The #2 GIA 63, the ADF, DME, GFC 700 AFCS, and the GDL 69A are

connected to this bus.

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Garmin Software Version 0321.23 Manual Pagina 39