Dynon Avionics FlightDEK-D180 Installation Guide - Manual (Page 41)

Instrument Installation
FlightDEK-D180 Installation Guide 4-3
turned on the heading display in the CLUTTR menu). If wiring is not correct, or the EDC-D10A
is not communicating properly with the FlightDEK-D180, you will see the message REMOTE
COMPASS NOT DETECTED in place of the heading onscreen.
The metal shield around the EDC communication cable is connected to the short black/white
wire emanating from the DB25. Connect this wire to ground.
Power Inputs
The FlightDEK-D180 has three separate power inputs, located on the EFIS connector. Of the
three, only Master Power is required to operate the instrument. The other two inputs provide
redundancy. Below is a table that explains the three inputs and their purposes. All three of these
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
Power
Red Provides primary power to the instrument. The
FlightDEK-D180 will switch on upon application of
power. Connect to a switched power source. Will not
be adversely affected by engine cranking.
2 Keep Alive
Power
Yellow A very low current power input which is only used if
both Master and External Backup Power are not
applied. Keep Alive draws just enough current to
keep the clock running. It draws less than 1 milliamp
of current when not charging the internal backup
battery.
Dynon Avionics recommends not connecting the
Keep Alive wire when the FlightDEK-D180 has an
internal battery installed or is connected to a GPS.
Keep Alive is only used in installations with no
battery or GPS to keep the clock running when the
unit is powered off.
3 Master
Ground
Black Connect to ground. Must carry as much as 3 amps.
Refer to the Grounding section on page 2-2 for more
detailed information.
15 External
Backup
Power
(Not wired
in Dynon
harness)
Will operate the FlightDEK-D180 only if Master
Power is not present. The transition from Master
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.