Dynon Avionics EFIS-D6 Installation Guide - Manual (Page 15)

Instrument Installation
EFIS-D6 Installation Guide 3-3
The metal shield around the EDC communication cable is connected to the short black/white
wire from the DB25. Connect this wire to ground.
Power Inputs
The EFIS-D6 has two separate power inputs, located on the DB25 EFIS connector. Only Master
Switch Power is required to operate the instrument. The other input provides redundancy. Below
is a table that explains both power inputs and their purposes. Both inputs share a common ground
signal, wired to pin 3 on the EFIS connector.
EFIS
DB25
pin#
Function EFIS DB25
wire color
Description
1 Master
Switch
Power
Red Provides primary power to the instrument. The
EFIS-D6 will switch on upon application of
power. Connect to a switched power source. Will
not be adversely affected by engine cranking.
3 Primary
Ground
Black Connect to ground. Must carry as much as 2
amps.
15 Emergency
Backup
Power
(Not wired in
Dynon
harness)
Will operate the EFIS-D6 only if Master Switch
Power is not present. The transition from Master
Switch Power to External Backup Power will
bring up a warning, requiring you to press ACK
within 30 seconds to keep the unit operating. This
warning will also display when transitioning from
either Master or External Backup to Internal
Battery power.
EFIS Serial Harness
The EFIS-D6 has one RS-232 serial port that can be used for two purposes. The EFIS Serial port
(DB9) is used for:
• Connecting to a PC to use the Dynon Support Program to perform firmware upgrades,
configure checklists, and download internal logs. The Help Files of the Support Program
provide detailed instructions on these functions. The latest version of the Dynon Support
Program can be downloaded at
downloads.dynonavionics.com .
• Connecting a compatible GPS receiver to serve as a backup to airspeed in the event of a
blocked pitot.