HS34 Pin Descriptions

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All installs: Power and ground. 12V or 28V airplanes. As with all Dynon equipment, this can be hooked to the master and can be on as the airplane cranks.

DSAB A & B - connect these to the DSAB bus that runs between all your Dynon equipment. A-A and B-B. Remember that when the HS34 ships you'll have a software update for all your Dynon units that will be "full" DSAB where all units use only DSAB and you can cross-control any unit from any other unit.

Serial 1 - You need to hook up a serial cable with TX/RX/GND and a 9 pin connector for PC updates. You can also use this if you have more than 1 serial device in your plane.

Only power and DSAB are required to use the knobs on the HS34, auto-dimming, and audio out.

Optional stuff:

ARINC-429 connections: This is what we are most directly supporting as a way to hook up radios right now. There are two ARINC-429 receivers and one ARINC-429 transmitter. The 429 standard allows a transmitter to be split to multiple receivers, but only one transmitter can be on a line. The 429 from the HS34 puts out whatever data we have that fits into the GAMA-429 standard, which is an extension of the base 429 standard. We send out OAT, magnetic heading, fuel flow, bugs, etc, so that other stuff can use this data, like a Garmin 430 showing winds right on the screen.

Serial connections: The HS34 has two serial ports, both bi-directional. Both support the same set of serial devices. GPS units, SL-30, etc. Serial 1 is used for PC updates, and can also be used for a device. Serial 2 is only used for other devices. If you have only one serial device, connect it to serial 2 so you don't need to split/switch anything. If you do use serial 1, you'll need a way to disconnect the device's TX line during updates. The definition of what is hooked to each port can all be done in the setup menu, so you don't need to hook a GPS to serial 1 and a SL-30 to serial 2 or any specific config.

GP in 1-4: These are identical to the GP inputs on a EMS. If you're short of inputs on your EMS, you can use these for OAT, trim, whatever.

Marker inputs: If you have a marker beacon receiver that puts out an output for each light, you can hook them here. These inputs are adjustable in software for active high, active low, and pulled up or not, so we hope we can support most systems. We also support maker beacons over ARINC-429 if you have some super fancy receiver.

Audio out: This is a full voice audio output. It should look a lot like a normal radio output signal, so just run it into an aux channel on your intercom / audio panel. In the future we hope to support software volume control, but at the first release, we suggest a potentiometer in-line to adjust the volume.

Analog resolver: As you can see, this has a ton of wires, but if your radio uses the C/D/E/F/G/H connection standard, it should work (note that the HS34 connections are named as described in the Generic Analog Wiring page. We're working on a list of stuff we know will work directly. Generally a radio that has a "integrated VOR/LOC converter" will work here.