EFIS-D100 Installation Guide - Dynon Avionics

Appendix
Appendix C: HS34 Installation and Configuration
If you purchased an HS34 from Dynon Avionics, read through this section for details on its
physical and electrical installation. It describes the pinout, mounting information, and some
common wiring connections.
WIRING
Follow these instructions explicitly as improper wiring can result in permanent damage to your
instrument, other connected equipment, or both. Read through the Recommended Wiring
Practices section on page 2-1 before proceeding.
Harness Construction
Because the HS34 interfaces with such a wide variety of NAV radios and GPSs in different
combinations of configurations, Dynon Avionics does not supply pre-manufactured harnesses for
the HS34. Instead, your HS34 shipped with enough connectors and pins to generate a wide
variety of harness configurations. Refer to the Pinouts and Function Description and Common
Device Connections sections below for detailed wiring information.
If you do not own a D-sub machined-pin crimping tool, they can be obtained for under USD$50
at www.bandc.biz (P/N RCT-3), www.steinair.com (P/N SAT-004), and many other tool
retailers. You may also find it helpful to own a pin insertion/extraction tool, part numbers DSE-1
and SAT-023, respectively.
Power Requirements
22 AWG wire is normally sufficient for the power supply and
ground lines, but you should consult a wire sizing chart and
determine the size required for your routing length. Make sure you
protect the power lines with either a circuit breaker or an
appropriately sized fuse for the wire you select. Power is fed to the
HS34 via pins in the male DB25 connector on the back of the
instrument.
The HS34’s power requirement is 2 watts typical and 3 watts
maximum. On a 12-volt system, this translates to about 0.25 amps
of maximum current draw. On a 24-volt system, this translates to
about 0.13 amps maximum current draw. Normally, a 0.5-amp
circuit breaker or fuse is sufficient.
Connector Description
The HS34 has two DB25 connectors on the rear of the instrument:
one male and one female. All references to connector gender in
this guide are used to describe the connectors on the back of the
HS34, not your harnesses. When building harnesses for the HS34,
make note of the fact that the pin order for the male connector is the
opposite of the order for the female connector. Small pin numbers
can be found next to each pin on both the instrument’s and
harness’s connectors.
7-10 EFIS-D100 Installation Guide