Dynon Avionics EFIS-D100 Installation Guide - Manual (Page 15)

Instrument Installation
EFIS-D100 Installation Guide 3-3
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.
The EFIS-D100 has three separate power inputs, located on the DB25 EFIS connector. Of the
er is required to operate the instrument. The other two inputs provide
e
Power Inputs
three, only Master Pow
redundancy. Below is a table that explains the three inputs and their purposes. All three of thes
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
Provides primary power instrument.
The EFIS-D100 will switch on upon
d
Red to the
application of power. Connect to a switched
power source. Will not be adversely affecte
by engine cranking.
2 Keep Alive
Power
Yellow
nd External Backup
as
A very low current power input which is only
used if both Master a
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 EFIS-D100 h
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
15 External
Backup
Power
(Not wired in
Dynon harness) is not present. The transition from
ll
.
Will operate the EFIS-D100 only if Master
Power
Master Power to External Backup Power wi
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