Aviation's Panel Mount Avionics Installation Leader

The HS34 is an optional expansion module that extends the HSI function already built into and displayed on Dynon’s EFIS. This panel-mounteddevice not only expands the HSI functionality but also enables several new features for any Dynon EFIS, EMS or FlightDEK instrument to whichit is networked. The HS34 is available in vertical and horizontal panel mount configurations.

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

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

The HS34 overcomes these restraints by adding ARINC-429, analog, and serial interfaces to cover many popularradios. With the addition of an HS34 to an EFIS, full compatibility is now possible with radios such as the Garmin 430/530. This includesadvanced features IFR pilots demand, such as CDI auto-scaling and full vertical guidance information from WAAS-enabled units. The HS34effectively eliminates the need to install a conventional CDI/GS head.

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

The HS34 expansion module is network connected to Dynon’s line of avionics via the Dynon Smart AvionicsBus (DSAB). This two-wire connection not only simplifies wiring but extends individual module benefits to multiple interconnected Dynoninstruments.


The HS34 is compatible with NAV radios using the industry-standard ARINC-429 or Analog outputs. It's alsocompatible with Navigation GPSs with either ARINC-429 or RS-232 serial output streaming either NMEA-0183 or Aviation format. The HS34requires that you have at least an EFIS-D10A, EFIS-D100 or FlightDEK-D180 installed in your plane.

Below is the list of devicesthat have been successfully tested with the HS34.

For CDI and Glideslope:

  • Garmin SL30 NAV/COMM Radio
  • Garmin GNS 430 and 430W GPS/NAV/Comm
  • Garmin GNS 530 and 530W GPS/NAV/Comm
For CDI only:
  • Garmin GPSMAP 196, 296, 396 496

  • Expanded HSI functionality
  • 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

  • Dimensions: 1.639"W x 4.903"H x 4.951"D (4.16 x 12.45 x 12.58 cm)
  • Panel Cutout: 1.50"W x 4.75"H (3.81 x 12.07 cm)
  • Mounting: Rear-mounted bracket (supplied with instrument)
  • Weight:12 oz (340 g)
  • Electrical: 10-30 Vdc, 3 watts
  • Connectors: 2 – DB25 connectors, mating connectors supplied
  • Operating Temperature: -30º C to 60º C
  • Storage Temperature: -30º C to 75º C
  • Humidity: 0-95% non-condensing

California Residents:

Prop 65 Warning: This product may contain chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm.