HS34 HSI Expansion Module

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The HS34 is an D10/D100 series optional expansion module that extends the HSI function already built into and displayed on Dynon’s D10, D100, and D180 EFISs. This panel-mounted device not only expands the HSI functionality but also enables several new features for the Dynon EFIS, EMS or FlightDEK instrument to which it is networked.The HS34 is available in vertical and horizontal panel mount configurations.

The expansion module concept provides exceptional value and performance while preserving the affordability of Dynon’s existing equipment. This modular approach offers greater flexibility when configuring new aircraft panel systems and facilitates future expansion if so desired.

Includes HS34 Vertical/Horizontal: 100755-000, HS34 Mounting Bracket:100758-000 , HS34 Connector Kits: HS34 Connector Kits: 100830-002,100831-000,100831-002, 7/64 Hex Wrench: 100556-000

Horizontal Orientation
SKU: 100790-001
Vertical Orientation
SKU: 100790-000

Additional Information

Additional Information

Expanded HSI Navigation Interface: While all of Dynon's EFIS instruments currently include HSI functionality, full compatibility with some GPS and NAV radios has been limited by the serial connection method.

The HS34 overcomes these restraints by adding ARINC-429 and serial interfaces to cover many popular radios. With the addition of an HS34 to an EFIS, full compatibility is now possible with radios such as the Garmin 430/530. This includes advanced features IFR pilots demand, such as CDI auto-scaling and full vertical guidance information from WAAS-enabled units. The HS34 effectively eliminates the need to install a conventional CDI/GS head.

Superior User Interface: The front panel provides dedicated controls and indicators that optimize the pilot’s control over the HSI. The controls are backlit to facilitate night flight conditions. Separate knobs are used for setting the Heading, the Course (OBS) or entering general purpose Values. Other controls include NAV and Bearing Source buttons that facilitate independent selection over each input. Pilots receive feedback of the currently selected navigation source type from separate GPS and NAV indicator lights.

Expanded D10/D100 Series EFIS/EMS Capabilities: In addition to expanded HSI functionality, the HS34 also provides several powerful features to interconnected Dynon instruments that include:
  • Use of the Value knob for adjusting the EFIS barometer, bugs, and timers.
  • A built-in light level sensor to automatically adjust the LCD screen brightness
  • Synthetic voice alert messages available for input to an intercom
  • Additional EMS general purpose and contact inputs

Network Link to Dynon’s Instruments:The HS34 expansion module is network connected via the Dynon Smart Avionics Bus (DSAB). This two-wire connection not only simplifies wiring but extends individual module benefits to multiple interconnected Dynon instruments.




1.639" wide x 4.903" high x 4.951" deep
(4.16 x 12.45 x 12.58 cm)

Panel Cutout:

1.50" wide x 4.75" tall (3.81 x 12.07 cm)


Rear-mounted bracket (supplied with instrument)


12 oz (340 g)


10-30 Vdc, 3 watts


2 – DB25 connectors, mating connectors supplied

Operating Temperature:

-30º C to 60º C

Storage Temperature:

-30º C to 75º C


0-95% non-condensing


2 – Bidirectional RS-232 serial
2 – ARINC-429 receivers
1 – ARINC-429 transmitter
1 – Marker beacon receiver input
1 – DME input
6 – EMS general purpose inputs
4 – EMS contact inputs
1 – Dynon Smart Avionics Bus (DSAB) interface
1 – Audio output to intercom

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