SV-D700 / SV-D1000 Installation and Configuration
SkyView System Installation Guide - Revision K 4-11
Serial Devices
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.
There are five general purpose RS-232 serial ports available for use with compatible equipment
on a SkyView display. Serial port transmit (TX) and receive (RX) wire sets are twisted together
and connected serial devices must share a common power ground with the SkyView display(s).
Typically connected serial devices include the SV-GPS-250, transponders, NAV radio (e.g.,
Garmin SL30), and other GPS devices (e.g., Garmin X96). Reference the SV-GPS-250 Installation
and Configuration Section of this guide for detailed installation and configuration instructions
for Dynon’s SV-GPS-250. Additionally, an external serial device (such as a PC) can be connected
and used to record real-time EMS module data that can be output by SkyView.
Serial port 5 is recommended for the SV-GPS-250 connection. Its wire bundle
includes serial transmit, receive, ground, and power, and its wires are color-
matched to the wire colors on the SV-GPS-250.
Transponders with serial altitude input can be directly connected to a display. To interface a
SkyView display to a gray code transponder, the use of a Dynon Encoder Serial-to-Gray Code
Converter Module (Dynon P/N 100362-000) is required. Reference the Encoder Serial-to-Gray
Code Converter Installation and Configuration Section of this guide for more information.
If you have more than one SkyView display, each external serial device’s serial TX wire needs to
be connected to each screen so that it can send information to each display individually.
Information that is received via serial connection is not automatically shared between multiple
SkyView displays in an aircraft. Additionally, if the serial device you are connecting to your
SkyView system can receive information from SkyView, that device’s RX wire must be
connected to all SkyView displays as well. SkyView has special hardware to allow multiple TX
lines to be connected together for redundancy. Dynon generally recommends making all
connections to/from a particular serial device to the same SkyView display serial port on every
display in the SkyView system. This simplifies serial port settings by allowing you to set each
display up identically.
The instructions above specify that both the TX and RX lines from external serial
devices be connected to multiple screens in parallel. SkyView systems that were
installed before the 2.6 version release may need some wiring changes to
accommodate this. Specifically, if your system has multiple SkyView displays and
your transponder is utilizing the serial altitude encoder output, the transponder
would have only been connected to one screen when you configured your
SkyView system. In 2.6 and all future firmware versions, one serial port from each
screen needs to be connected and configured to provide serial altitude
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