Dynon Avionics EMS-D120 Installation Guide - Manual (Page 36)

Instrument Installation
4-4 EMS-D120 Installation Guide
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
(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 4-7.
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.