Dynon EFIS-D10A User manual

EFIS-D10A
Installation Guide
This guide intended for use with Experimental/LSA/Ultralight/Microlight installations.
P/N 100341-000, Revision L
For use with firmware version 5.6
February 2021
Copyright © 2003-2021 by Dynon Avionics, Inc.

Contact Information
Dynon Avionics, Inc.
19825 141st Place NE
Woodinville, WA 98072
Phone: [phone] - 7:30 AM –5:00 PM (Pacific Time) Monday - Friday
Dynon Avionics offers online sales, extensive support, and continually-updated information on its products via its
Internet sites:
•www.dynonavionics.com/support –Dynon Avionics primary web site; including:
•docs.dynonavionics.com –Current and archival documentation.
•downloads.dynonavionics.com –Software downloads.
•support.dynonavionics.com –Support resources.
•store.dynonavionics.com –Dynon’s secure online store for purchasing all Dynon products 24 hours a
day.
•wiki.dynonavionics.com –Dynon Avionics’ Documentation Wiki provides enhanced, extended,
continuously-updated online documentation contributed by Dynon employees and customers.
•forum.dynonavionics.com –Dynon Avionics’ Internet forum where Dynon customers can interact
and receive Dynon technical support outside of telephone support hours. A key feature of the forum
is that it allows the exchange of diagrams, photos, and other types of files.
•newsletter.dynonavionics.com –Dynon’s email newsletter.
•blog.dynonavionics.com –Dynon’s blog where you can find new and interesting Dynon-related
content.
Copyright
©2003-2021 Dynon Avionics, Inc. All rights reserved. No part of this manual may be reproduced, copied, transmitted, disseminated or stored in
any storage medium, for any purpose without the express written permission of Dynon Avionics. Dynon Avionics hereby grants permission to
download a single copy of this manual and of any revision to this manual onto a hard drive or other electronic storage medium to be viewed for
personal use, provided that such electronic or printed copy of this manual or revision must contain the complete text of this copyright notice and
provided further that any unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited.
Information in this document is subject to change without notice. Dynon Avionics reserves the right to change or improve its products and to
make changes in the content without obligation to notify any person or organization of such changes. Visit the Dynon Avionics website
(www.dynonavionics.com) for current updates and supplemental information concerning the use and operation of this and other Dynon Avionics
products.

Limited Warranty
Dynon Avionics warrants this product to be free from defects in materials and workmanship for three years from date of shipment. Dynon
Avionics will, at its sole option, repair or replace any components that fail in normal use. Such repairs or replacement will be made at no charge
to the customer for parts or labor. The customer is, however, responsible for any transportation cost. This warranty does not cover failures due to
abuse, misuse, accident, improper installation or unauthorized alteration or repairs.
THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE EXCLUSIVE, AND IN LIEU OF ALL OTHER WARRANTIES
EXPRESSED OR IMPLIED, INCLUDING ANY LIABILITY ARISING UNDER WARRANTY OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE, STATUTORY OR OTHERWISE. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, WHICH
MAY VARY FROM STATE TO STATE.
IN NO EVENT SHALL DYNON AVIONICS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL
DAMAGES, WHETHER RESULTING FROM THE USE, MISUSE OR INABILITY TO USE THIS PRODUCT OR FROM DEFECTS IN
THE PRODUCT. SOME STATES DO NOT ALLOW THE EXCLUSION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE
ABOVE LIMITATIONS MAY NOT APPLY TO YOU.
Dynon Avionics retains the exclusive right to repair or replace the instrument or firmware or offer a full refund of the purchase price at its sole
discretion. SUCH REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY.
These instruments are not intended for use in type certificated aircraft at this time. Dynon Avionics makes no claim as to the suitability of its
products in connection with FAR 91.205.
Dynon Avionics’products incorporate a variety of precise, calibrated electronics. Except for replacing the optional internal backup battery in
EFIS-based products per the installation guide, our products do not contain any field/user-serviceable parts. Units that have been found to have
been taken apart may not be eligible for repair under warranty. Additionally, once a Dynon Avionics unit is opened up, it will require calibration
and verification at our Woodinville, WA offices before it can be considered airworthy.

EFIS-D10A Installation Guide v
Table of Contents
1. Introduction 1-1
OEM Installations ...............................................................................................................................................1-1
Warning..............................................................................................................................................................1-1
About this Guide.................................................................................................................................................1-2
Menu Descriptions ..............................................................................................................................................1-2
2. Wiring Overview 2-1
Recommended Wiring Practices..........................................................................................................................2-1
Power Requirements............................................................................................................................................2-1
25-Pin Female EFIS Harness...............................................................................................................................2-2
3. Instrument Installation 3-1
Selecting a Remote Compass Module Location....................................................................................................3-1
EDC-D10A Communication Cable......................................................................................................................3-2
Power Inputs.......................................................................................................................................................3-3
Serial Communication Cable ...............................................................................................................................3-4
SL30 and/or GPS connection...............................................................................................................................3-5
Altitude Encoder Wiring......................................................................................................................................3-8
Audio Alert Output............................................................................................................................................ 3-10
Dynon Smart Avionics Bus (DSAB) Wiring ......................................................................................................3-11
Panel Location and Mounting............................................................................................................................3-12
Connecting Static & Pitot Lines......................................................................................................................... 3-14
4. EFIS Calibration and Configuration 4-1
Ensuring Proper Installation.................................................................................................................................4-1
Setting Zero Pitch (In flight)................................................................................................................................4-1
Compass Heading Calibration..............................................................................................................................4-1
Configure Airspeed Color Thresholds..................................................................................................................4-7
5. DSAB Configuration 5-1
Network Concepts...............................................................................................................................................5-1
Example Networks..............................................................................................................................................5-2
Initial Setup.........................................................................................................................................................5-4
Network Status....................................................................................................................................................5-5
6. Autopilot Installation and Configuration 6-1
Additional Information and Updates....................................................................................................................6-1
DSAB Firmware Compatibility............................................................................................................................6-2
Compass Calibration Critical For Certain AP Modes............................................................................................6-2
Autopilot System Electrical Installation...............................................................................................................6-3
Servo Mechanical Installation..............................................................................................................................6-6
AP74 Mechanical Installation............................................................................................................................6-11
Firmware Upgrades Required For AP Functionality...........................................................................................6-13
AP Servo Configuration .................................................................................................................................... 6-14
AP74 Configuration .......................................................................................................................................... 6-30
7. Appendix 7-1
Appendix A: Ongoing Maintenance and Troubleshooting ....................................................................................7-1
Appendix B: Dynon OAT Probe Installation and Usage.......................................................................................7-7
Appendix C: HS34 Installation and Configuration.............................................................................................. 7-10
Appendix D: Dynon AOA/Pitot Installation and Calibration...............................................................................7-24
Appendix E: Encoder Serial-to-Gray Code Converter Installation.......................................................................7-32
Appendix F: Replacing the EFIS-D10A battery pack..........................................................................................7-35

Table of Contents
vi EFIS-D10A Installation Guide
Appendix G: Weights........................................................................................................................................ 7-36
Appendix H: EFIS-D10A Specifications............................................................................................................7-36

EFIS-D10A Installation Guide 1-1
1. INTRODUCTION
This manual provides information about the physical, electrical, and plumbing installation of the
EFIS-D10A, EDC-D10A and optional AOA pitot probe purchased from Dynon Avionics.
Additionally, this guide deals with setting up the installation-dependant firmware options.
Because you may not have purchased all the components, you need only read through the
relevant sections of this guide. Information about the operation of this instrument can be found
in the EFIS-D10A Pilot’s User Guide.
The EFIS-D10A uses solid-state sensor technology to give an accurate and easy-to-understand
display. To ensure accuracy in its readings, it is very important that you install the instrument
correctly and perform the specified calibration steps. This installation guide will help you
through that process.
OEM Installations
If your EFIS-D10A is installed by an OEM distributor, you may find that you are unable to
access some menus and settings. Some Dynon distributors customize various areas of the EFIS-
D10A firmware to maintain a consistent pilot experience and minimize integration issues across
a large number of installations. Currently, OEMs can customize access levels to the following
settings on Dynon systems: EMS GLOBAL setup menu, EMS SENSOR setup menu, fuel
calibration, trim calibration, flaps calibration, GPS/NAV setup menu, screen configurations, data
logging, and checklists/data panels. OEM distributors have the option of customizing some or all
of these areas. Please contact your aircraft’s manufacturer if you have any questions about how
your unit has been customized.
Warning
Dynon Avionics’products incorporate a variety of precise, calibrated electronics. Except for
replacing the optional internal backup battery in EFIS-based products per the installation guide,
our products do not contain any field/user-serviceable parts. Units that have been found to have
been taken apart may not be eligible for repair under warranty. Additionally, once a Dynon
Avionics unit is opened up, it will require calibration and verification at our Woodinville, WA
offices before it can be considered airworthy.

Introduction
1-2 EFIS-D10A Installation Guide
About this Guide
In the electronic (.PDF) version of this manual, page and section references in the Table of
Contents and elsewhere act as hyperlinks taking you to the relevant location in the manual. The
latest version of this manual is available on the Dynon Avionics website at
docs.dynonavionics.com.
The following icons are used in this guide:
Any text following this icon describes functionality available only with the HS34 HSI
Expansion Module connected to your system.
Any text following this icon describes functionality available only with the AP74
Autopilot Interface Module connected to your system.
Any text following this icon describes functionality that is possible when multiple Dynon
Avionics products are networked together via the Dynon Smart Avionics Bus (DSAB).
Any text following this icon refers to a setting or situation which merits particularly close
attention.
Menu Descriptions
Throughout this guide, the “>“character is used to indicate entering a deeper level of the menu
system. For example, “EFIS > SETUP > VRSION”indicates entering the EFIS menu, pressing
MORE, then pressing SETUP, and then pressing VRSION to enter the firmware version menu.
Note that the MORE button is not shown in the sequence, since pressing MORE reveals more
options in the same level of the menu system.

EFIS-D10A Installation Guide 2-1
2. WIRING OVERVIEW
Please follow these instructions explicitly as improper wiring can result in permanent damage to
your instrument and/or the accompanying sensors.
All electrical power and EFIS-specific lines interface with the EFIS-D10A via the female 25-pin
D-sub connector on the back of the instrument. Ensure that the unit powers on and that all
indicators display expected values before completing the final physical assembly.
Recommended Wiring Practices
For all electrical connections, use correct wiring techniques, taking care to properly
insulate any exposed wire. A short circuit between any of the wires may cause damage to
the EFIS-D10A and/or your aircraft. Make all connections to your harness before
plugging it into any of the components of the system. Do not make connections while
power is applied at any point in the system.
Dynon Avionics sells a wiring harness for all connections to the EFIS-D10A. The harness is
made up of 22 AWG wire and meet Mil Standard MIL-W-22759/16 (Tefzel insulation). If you
have opted not to purchase this harness, please refer to the provided wiring diagrams for
construction information. We recommend that all wire you use also meets Mil Standard MIL-W-
22759/16; all wire supplied by Dynon Avionics (with the exception of thermocouple wire, which
uses FEP insulation) meets this specification.
When using any pre-manufactured harness, verify that each pin has continuity with the expected
wire on the wiring diagram. This test can be easily done with a multimeter. When verifying
harnesses, use the wiring charts and diagrams in this guide as your ultimate authority on pin
function (for any harness) and wire color (for harnesses purchased from Dynon Avionics).
Route all wiring such that there are no spots where it could chafe or break. Use appropriate strain
relief at all junctions between wires and connectors. We recommend that you secure all wires at
regular intervals along wiring runs to accommodate vibration effects.
All connections on the EFIS female 25-pin harness are described in the Instrument Installation
section on page 3-1.
Power Requirements
22 AWG wire is normally sufficient for the power supply and ground lines, but we recommend
that you consult a wire sizing chart and determine the size required for the wire routing in your
particular aircraft. Ensure that the power lines include a circuit breaker or an appropriately sized
fuse for the wire you select. Power is fed to the EFIS-D10A via pins in the female D-25
connector as shown on the 25-Pin Female EFIS Harness diagram on page 2-2.
The EFIS-D10A system-wide power requirement is 8 watts typical and 13 watts maximum. On
a 12-volt system, this translates to about 1 amp of maximum current draw. On a 24-volt system,
this translates to about 0.5 amp maximum current draw. Normally, a 2-amp circuit breaker or
fuse is sufficient.

Wiring Overview
2-2 EFIS-D10A Installation Guide
25-Pin Female EFIS Harness
Below is the wiring diagram of the EFIS 25-pin female harness. If you purchased your harness
from Dynon Avionics, it is color coded according to the chart on the following page. Unless
noted otherwise, all wires are 3 feet long on the Dynon-provided harness.

Wiring Overview
EFIS-D10A Installation Guide 2-3
The pin assignments for the female 25-pin harness are repeated below. Note that the pin numbers
are labeled on the face of both the female and male connector. Each connection on the harness
supplied by Dynon is color-coded. These colors are listed in the following chart.
Female
DB25
Pin #
Dynon Harness Wire
Color
Function
Details
1
Red
Master Power (10-30 volts)
Page 3-3
2
Yellow
Keep Alive Power (10-30 volts,
always on)
Page 3-3
3
Black
Master Ground
Page 3-3
4
Green
DSAB-A
Page 3-11
5
Blue
DSAB-B
Page 3-11
6
N/A
No Connect
7
N/A
No Connect
8
N/A
No Connect
9
Black (bundled)
PC Serial Ground
Page 3-4
10
Orange (bundled)
EFIS-D10A Transmit / PC Serial
Receive (RS-232)
Page 3-4
11
White/Orange (Red on some
harnesses)
EDC-D10A Data B
Page 3-1
12
White/Blue (Black on some
harnesses)
EDC-D10A Power (12V)
Page 3-1
13
Blue/White (black on some
harnesses)
Serial Encoder Transmit (RS-232)
Page 7-32
14
N/A
No Connect
15
N/A
External Backup Power
Page 3-3
16
Black
Ground
17
N/A
No Connect
18
Green
Audio out
Page 3-10
19
N/A
No Connect
20
N/A
No Connect
21
White (Bundled in Encoder
cable)
Serial Encoder Ground
Page 7-32
22
Yellow (Bundled)
EFIS-D10A Receive / PC Serial
Transmit (RS-232)
Page 3-4
23
White/Green (Green on some
harnesses)
EDC-D10A Data A
Page 3-1
24
White
EDC-D10A GND
Page 3-1
25
N/A
No Connect

Wiring Overview
2-4 EFIS-D10A Installation Guide
WIRING SYSTEM OVERVIEW
The following block diagram depicts the basic layout of the EFIS DB25 electrical connections
and is for reference only. Read the specific instructions for each connection prior to installation.
The colors shown refer to the Dynon-supplied EFIS harness.

EFIS-D10A Installation Guide 3-1
3. INSTRUMENT INSTALLATION
This section provides you with the information needed to physically and electrically install the
EFIS-D10A.
Selecting a Remote Compass Module Location
Finding a good location for the EDC-D10A
remote compass module is critical to an
accurate EFIS-D10A heading display. Keep
in mind that calibration can compensate for
small static magnetic fields superimposed
upon the earth’s field; it cannot take
into account dynamic effects like
AC currents, non-constant DC
currents and non-stationary ferrous
material (e.g., an electric turn
coordinator). Use the following
suggestions to help you find a good
location for your EDC-D10A.
•Keep the EDC-D10A away
from any source of magnetic fields
(such as electrical equipment and
current-carrying wires) and ferrous
material.
•Move a handheld compass throughout
the space surrounding your location to
get a rough idea of the suitability of
your chosen location. If the needle
deviates significantly from magnetic
north in any given area, that location
would not be ideal for the EDC-D10A.
•The EDC-D10A can be mounted
anywhere in the aircraft (away from
magnetic interference) such that its
pitch is as close to that of the EFIS-D10A as possible. It does not need to be directly
along any axis of the EFIS-D10A. It
should be mounted with the long
axis parallel to the wings, the
electrical connector facing toward
the front of the plane, and the
mounting tabs on the bottom. The
bracket used to hold the EDC-D10A
must hold the EDC-D10A at the
same pitch, roll, and yaw as the
Connector forward and
tabs mounted down
Connector toward
direction of flight
Side view of EDC-D10A, tabs mounted
down and aligned within 1 degree of
pitch with EFIS-D10A

Instrument Installation
3-2 EFIS-D10A Installation Guide
EFIS-D10A with respect to the airframe. We recommend that you use an electronic
level, if available, to make sure the EDC-D10A is aligned with the EFIS-D10A to
better than 1 degree.
•All mounting hardware needs to be made from non-ferrous material such as
aluminum, plastic, or brass. Many stainless steel screws are magnetic. If the item is
attracted to a magnet, it should not be used in the installation. The EDC-D10A needs
to be mounted in a location as free from magnetic interference as possible. This
means keeping the EDC-D10A away from any ferrous nuts, bolts, and screws,
aircraft tubing, as well as from wires or devices carrying any appreciable current
such as strobe light wiring, autopilot servos, or other electronics.
EDC-D10A Communication Cable
DO NOT ATTEMPT TO POWER UP THE EFIS-D10A WITH THE EDC CABLE
LEADS EXPOSED (UNSHEATHED) AND NOT INSTALLED IN THE DB9
CONNECTOR. SHORTING THESE CONNECTIONS WILL CAUSE DAMAGE TO
THE UNIT.
Like the RS-232 PC Communication cable, the EDC-D10A communications cable terminates in
a standard female DB9 connector. While they look similar, do not plug the EDC cable into a PC
or vice versa. The following table outlines the four connections that must be made to ensure
proper communication between the EFIS-D10A and the EDC-D10A remote compass module.
The Dynon-supplied harness colors are listed, as well.
EFIS
DB25 pin#
EDC
DB9 pin#
Function
Wire color
11
5
EDC Data B
White/Orange (or Red)
12
6
EDC Power
White/Blue (or Black)
23
9
EDC Data A
White/Green (or Green)
24
1
EDC Ground
White
The EDC cable in the harness supplied by Dynon consists of 4 conductors, surrounded by a
metal shield and white insulation. These 4 wires are terminated with crimped female D-sub pins
wrapped in plastic tubing. If you are building your own cable, we recommend that you use
shielded cable as well.
•With the 25-pin EFIS harness disconnected from the EFIS-D10A, carefully cut or pull
the tubing off the 4 D-sub pins.
•Route the cable to the EDC-D10A mounting location chosen according to the
instructions above.
•Install the female pins in the correct holes on the included DB9 connector, according
to the chart above. Note that Dynon has shipped harnesses with different colors
for the EDC cable; determine your connections using the two sets of colors in the
table above.
•Install the back shell around the DB9 connector.
Correct wiring installation can be easily verified once completed. Power on the EFIS-D10A with
the EDC-D10A connected to it. Observe the displayed heading and then hold one of the

Instrument Installation
EFIS-D10A Installation Guide 3-3
earpieces of a headset near the front of the EFIS-D10A. If the EDC-D10A is correctly wired, you
should see no change in the displayed heading when the headset earpiece and its magnetic
speaker is near the EFIS-D10A. If you see a substantial change in heading, there is a
communication problem between the EFIS-D10A and the EDC-D10A.
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 close to the EFIS-D10A, ideally the
panel.
Power Inputs
The EFIS-D10A has three separate power inputs, located on the DB25 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
EFIS-D10A 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 EFIS-D10A 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 2
amps.
15
External
Backup
Power
(Not wired in
Dynon
harness)
Will operate the EFIS-D10A 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.

Instrument Installation
3-4 EFIS-D10A Installation Guide
Serial Communication Cable
More Information Is Available Online: Serial communication to non-Dynon devices,
and interfacing of other devices in general can be involved and detailed. This Installation
Guide is intended to provide general installation advice for the most common devices and
situations. Dynon’s Documentation Wiki provides enhanced, extended, frequently
updated online documentation contributed by Dynon employees and customers at
wiki.dynonavionics.com.
The EFIS-D10A has one RS-232 serial port that can be used for several purposes. This serial
port can only be configured for one purpose at a time.
The EFIS Serial port (DB25) is used for:
•Connecting to a PC, and using the Dynon Avionics Product 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 Product Support Program is available on the Dynon web site at
downloads.dynonavionics.com.
•Connecting serial devices such as a GPS receiver or an SL30.
•“Streaming”real-time EFIS flight data to an external serial device for recording. For data
formats and other information, see the Appendix in the EFIS-D10A Pilot’s User Guide.
Note that for the purposes of logging data, version 5.0 of EFIS-D10A firmware added
internal data logging and retrieval via the Dynon Product Support Program.
When an optional HS34 Expansion Module is connected to your Dynon DSAB network,
all GPS and NAV radios must be connected to it. This simplifies the connection and
usage of multiple serial devices. The HS34 also provides interfaces to non-serial devices
such as those with only analog and ARINC-429 interfaces.
PC USB CONNECTION
If you do not have a serial port on your PC, you may use a USB-to-Serial adapter to connect the
EFIS-D10A to your PC’s USB port. You may purchase an adapter from us, Radio Shack, or
many computer stores. If you are using Windows 2000 or XP, ensure that the adapter driver CD
is inserted in your PC before plugging the adapter into the USB port for the first time. If you are
using Windows Vista, ensure that you are connected to the Internet and do not use the driver
CD; the operating system will download the correct driver. Also, do not have your EFIS-D10A
plugged into the USB-to-Serial adapter while installing the driver.
EFIS SERIAL HARNESS
On the EFIS 25-pin wiring harness
available from Dynon, there are three
wires bundled together, terminating in a
standard DB9-pin female connector. This
cable is 6’long and pre-assembled for
connection to a PC-based laptop. Route
this cable to a convenient location that can
EFIS
DB25
Pin#
DB9
Pin#
Wire
Color
RS-232 Function
9
5
Black
Signal ground
10
2
Orange
EFIS-D10A transmit /
device receive
22
3
Yellow
EFIS-D10A receive /
device transmit

Instrument Installation
EFIS-D10A Installation Guide 3-5
be accessed whenever you need to update your product’s firmware or checklists.
If you did not purchase a harness from Dynon, obtain a 9-pin D-sub connector and make the
three connections shown in the table.
To verify proper communication between the EFIS-D10A and the PC, use the Dynon Avionics
Product Support Program’s “Detect Firmware Version” function. Download the latest version of
the Support Program from the Dynon Web Site at download.dynonavionics.com.
SL30 and/or GPS connection
Depending on the number and types of Dynon units you own,
you have several options for connecting a GPS unit and/or
Garmin/Apollo SL30 to your Dynon system. The GPS can be
used as a data source for the EFIS, HSI, and Fuel pages, as
well as Dynon’s EFIS-based Autopilot. The SL30 can be
used as a VOR, localizer, or ILS (localizer + glideslope)
source for the HSI. If you wish to connect a GPS and/or
SL30 to your Dynon system, read the section below which
corresponds to your set of Dynon products.
If your system has an HS34, it is required that all
GPS and NAV devices are connected to the HS34.
The EFIS-D10A does not support directly connected
GPS and NAV devices when an HS34 is installed in
the system. Refer to the HS34 Installation and
Configuration section on page 7-10 for device
connection details.
To use the GPS-related features on your EFIS and/or EMS,
your GPS must output either “aviation format”or the
following NMEA sentences in its serial stream: $GPRMC,
$GPRMB, $GPGGA, and one of $GPBOD or
$GPAPB. You must also have a supported cable
that exposes your GPS’s serial transmit line. If
you own a Garmin 430 or 530, in the
UNITS/MAGVAR option, set the MAGVAR to
AUTO. The EFIS-D10A auto-detects most
GPSs, but may require a manual setting for
some. This is true for communication with at
least the Garmin 480 and maybe others such as
the GX50, and GX60, and Bendix/King Skymap
IIIc. From the EFIS menu, enter SETUP >HSI
>EFIS_SERIAL; from the EMS menu enter
SETUP >GLOBAL >EMS SERIAL. In that
menu select the INPUT to be AVIATION and
the BAUD RATE to be 9600.
GPS units known to work
AvMap EKP-IV (v2.06.116R,
NMEA set to “processed”)
Bendix/King Skymap (set to
AR NAV 9600 output)
Garmin
96, 96c, 150XL, 195, 196, 295,
296, 396, 400*, 420*, 430*,
430W*, 496, 500*, 520*,
530*, 530W*, GX60, GX65
Lowrance handhelds
* Do not output time over
serial; ARINC connection via
HS34 required to receive time.
A frequently updated list of
compatible GPS units and
settings is available at our
Documentation Wiki at
wiki.dynonavionics.com.
GPS units with limited functionality
AnywhereMap
Does not output all needed
sentences. Time output is
wrong.
Garmin
(Apollo) GNS
480
Possibly works with latest
Dynon product firmware,
but untested. Requires
manual configuration. See
note at left. Fully
compatible via ARINC
into optional HS34.
A frequently updated list of compatible GPS
units and settings is available at our
Documentation Wiki at
wiki.dynonavionics.com.

Instrument Installation
3-6 EFIS-D10A Installation Guide
The following connection schemes assume that the external devices share a common ground
with the Dynon product(s). If your GPS is battery powered, and not normally connected to
aircraft ground, you must connect the ground pin on its serial output to a ground common to the
EFIS-D10A.
When a Dynon product is connected to a GPS, it will synchronize its Zulu clock to the time
reported by the GPS. However, some GPSs, such as the Garmin 430 and 530, do not report time
in their serial output stream. Dynon products have no way to synchronize to these GPSs’clocks.
Read the section below that corresponds to your configuration of Dynon products. All EFIS-
based product configurations direct you to connect your external device to PC serial receive (pin
22) on your Dynon EFIS product. You may make this connection at any point between pin 22 on
the EFIS DB25 and pin 3 on the connected DB9 EFIS/PC connector. If you purchased your
harness from Dynon Avionics, it may have a yellow/green wire provided for this purpose.
IF YOU OWN ONLY AN EFIS-D10A OR EFIS-D100
Connect the GPS or SL30 transmit line into pin 22 on the DB25 connector. This is the same
Serial Rx line that is used for firmware updates. You will need a way to disconnect this when
you plug your EFIS into a PC for firmware updates and checklists.
If you have both a GPS unit and an SL30, you will need to wire the two transmit lines to a 3-way
switch; connect the output of the switch into pin 22 on the EFIS harness. You will use this switch
to toggle between GPS, SL30 and a disconnected state. The HSI auto-detects the switched
instrument and will change modes automatically.
IF YOU OWN TWO EFIS-ONLY UNITS
When 2 EFIS-only units are connected via DSAB, only the DSAB Bus Master’s serial port is
active.
If you have only one serial device (GPS or SL30), connect its transmit line to pin 22 on the
DB25 connector of the EFIS that you have chosen to be the Bus Master. This is the same Serial
Rx line that is used for firmware updates. You will need a way to disconnect this when you plug
your EFIS into a PC for firmware updates and checklists.
If you have both a GPS unit and an SL30, you have two options:
•Wire the 2 devices’ transmit lines to a switch, allowing you to select the serial device
active on the HSI screen.
•Do not connect the two EFIS units together via DSAB. You may then wire one device to
one EFIS’ pin 22, and the other device to the other EFIS. Of course, the EFIS devices
would be independent and unable to share GPS or SL30 data.
You will need a way to disconnect both lines when you plug your EFIS into a PC for firmware
updates and checklists.
IF YOU OWN ONLY AN EMS-D10 OR EMS-D120
We recommend that you only connect a GPS to an EMS-only system; without the magnetic
heading from an EFIS, the HSI page will not be functional. Connect the GPS transmit line to pin
19 on the EMS DB37 connector. This connection will give you fuel endurance information

Instrument Installation
EFIS-D10A Installation Guide 3-7
(range, MPG, etc) on the fuel page and GPS information only (track, ground-speed, course, etc)
on the HSI page. There is no need to break this connection when doing PC updates.
IF YOU OWN AN EMS AND AN EFIS (NOT FLIGHTDEK-D180)
First, ensure that your EMS and EFIS are connected as described in Dynon Smart Avionics Bus
(DSAB) Wiring on page 3-11.
If you only have either the GPS or SL30 (but not both), connect the GPS or SL30 transmit line to
pin 19 on the EMS DB37 connector. This is labeled “Aux Serial Receive.”With either a GPS or
an SL30 connected, you are able to display an HSI on either product; with a GPS connected, you
are able to display EMS fuel economy displays.
If you have a GPS and an SL30, connect the GPS to pin 19 on the EMS DB37 connector.
Connect the SL30 to pin 22 on the EFIS DB25 connector. This will allow you to flip between
GPS and SL30 inputs. You can use either the SL30 or GPS as the NAV source on the EFIS
product. You will need to disconnect the SL30 from the EFIS when doing software updates.
IF YOU OWN ONLY A FLIGHTDEK-D180
Connect the SL30 unit to pin 22 on the EFIS DB25 connector, and the GPS to pin 19 on the
EMS DB37 connector. You can display either source on the HSI using the softkeys. You will
need to disconnect the SL30 from the EFIS when doing software updates.
IF YOU OWN A FLIGHTDEK-D180 AND AN EFIS
Connect the SL30 unit to pin 22 on the FlightDEK’s EFIS connector (vertical DB25) and the
GPS to pin 19 on the EMS DB37 connector. You can display either source on the HSI, and you
can display either on the standalone EFIS as well (provided you have connected the DSAB A &
B lines from the FlightDEK-D180 to the standalone EFIS product). You will need to disconnect
the SL30 from the FlightDEK-D180 when doing software updates.
Do not connect any serial devices to the secondary EFIS device. It will only display data from
the serial devices connected to the master FlightDEK-D180.

Instrument Installation
3-8 EFIS-D10A Installation Guide
If your transponder requires parallel Gray
code input, and you wish to use the EFIS-
D10A as your altitude encoder, you will
need to purchase Dynon Avionics’ Encoder
Serial-to-Parallel Converter. Please refer
to page 7-32 for more information on the
installation of this option.
Altitude Encoder Wiring
The EFIS-D10A outputs its altitude
measurements in one of four standard serial
outputs and is readable by many modern
transponders. The EFIS-D10A will function
properly whether or not this altitude encoder
functionality is used. To use the EFIS-
D10A‘s altitude encoder functionality,
simply wire the 2 encoder connections
(GND and Encoder Transmit) from the
DB25 connector to their respective connections on
your transponder.
Per ATC/FAA requirements, the serial encoder output
of the EFIS-D10A reports pressure altitude, which, by
definition, is indicated altitude when the baro is set to
29.92. So, when you set your EFIS-D10A‘s baro
adjustment to 29.92, its indicated altitude will match
the altitude that is being reported to your transponder.
There are four different serial formats used by
transponders. The EFIS-D10A can output any of these formats. To select which format the EFIS-
D10A sends out its serial encoder output port, you must choose the appropriate format via the
menu system. When the menu system is displayed, enter the MORE > SETUP > MORE >
ALTENC. When in the Altitude Encoder Setup menu, you can toggle the resolution of the output
between 10 and 100 feet; this accommodates some transponders which can input and display
altitude in 10 foot increments. In this menu, you can also select between the four different output
formats, which are described below.
Dynon’s supplied EFIS harness has a serial altitude encoder cable which consists of 2
conductors, surrounded by a metal shield and white insulation. Dynon has shipped harnesses
with different colors for Encoder serial transmit line. Determine your connections using the table
at right. Connect the Encoder serial transmit to your transponder’s serial input or to Dynon’s
Serial-to-Parallel Converter as described in the Encoder Serial-to-Gray Code Converter
Installation section on page 7-32 in the Appendix.
EFIS
DB25
pin#
Function
Wire color
13
Encoder
serial
transmit
Blue/White
(or black)
21
Ground
White

Instrument Installation
EFIS-D10A Installation Guide 3-9
SERIAL ALTITUDE FORMATS
There are four formats used by serial transponders. Choose the correct format for your
transponder in the ALTENC menu, using the FRMAT button.
Format 1
Used By
Dynon Encoder Serial-to-Parallel Converter, Garmin AT
(formerly UPS Aviation Technologies)
Baud rate
1200
Format
#AL, space, +/-sign, five altitude bytes, T+25, checksum,
carriage return
Example message
#AL +05200T+25D7[CR]
Format 2
Used By
Magellan
Baud rate
1200
Format
$MGL, +/- sign, five altitude digits, T+25, checksum, carriage
return
Example message
$MGL+05200T+25E3[CR]
Format 3
Used By
Northstar, Garmin
Baud rate
2400
Format
ALT, space, five altitude bytes, carriage return
Example message
ALT 05200[CR]
Format 4
Used By
Garmin GTX330 (set on Icarus input), Garmin GTX327 (set
on Icarus input), Garmin GTX328, Icarus, Trimble
Baud rate
9600
Format
ALT, space, five altitude bytes, carriage return
Example message
ALT 05200[CR]