Revision A5 1-11
GRT Avionics HXr Installation Manual
The
pinout diagrams
included in this manual are designed to give you the pre-wired pin locations
for required components, as well as the pin locations of the serial ports and optional items.
NC
means “no connection,” or a pin that leads to nothing inside the EFIS.
TX,
or transmit, designates
a Serial OUT, and
RX,
or receive, designates a Serial IN connection.
The
graphic interface diagrams
are provided as an example of how different devices can be wired
to the EFIS display units. These diagrams offer an efficient way to use the serial ports based on
many years of experience of our techs. Of course, this is just an example, and different third-party
equipment and serial port configurations are left up to the builder and panel designer.
For More Information…
Depending on what your “mission” is, you may want a simple VFR system, or an IFR system with
many built-in redundancies. The GRT system enables customization for the whole range of
possibilities, from simple to sophisticated, depending on the builder’s desire and skill level.
While this manual covers the very basics of EFIS wiring & communication and the GRT HXr-specific
details, there are many very important safety aspects of aircraft wiring that we cannot even begin
to discuss in this manual. The techs at GRT recommend the following sources for more information
on proper aircraft avionics & electrical system design:
by Bob Nuckolls is a great place to start. This manual covers everything
from the very basics of electricity to the proper design and installation of sophisticated IFR-capable
systems.
Longtime EAA columnist Tony Bingelis’s books, the
series, have long been a
staple of experimental aircraft builder knowledge. In addition to wiring considerations, Mr. Bingelis
discusses all aspects of kitplane building, from spinner to tail.
FAA Advisory Circular 43.13-2B provides the “certified” reference for safe and durable aircraft wiring
techniques, though it is a bit outdated. It is available online for free download from www.faa.gov.
All of the above publications are available at Amazon.com.
The Experimental Aircraft Association has compiled a collection of videos called Hints for
Homebuilders on its website, www.eaa.org. A quick search through these will give you valuable
hints on various wiring topics, including properly crimping D-sub/Molex connector pins.
1.5 HXr Accessories and Packing List
Your HXr system has been carefully inspected and packaged. It includes the EFIS display unit and
associated accessories. Before installing and getting started with your new system, please use the
packing list that accompanied the EFIS and the following paragraphs to ensure that no items are
