11/06 Dynon EFIS wiring

The Vertical Power Contol Unit is all wired up except for tidying up and testing each circuit. So today after work, I continued working on the Dynon EFIS wiring. The Dynon D-10A has one set of blue and green wires for the Dynon Smart Avionics Bus (DSAB) that lets you swap screens on the EFIS and the EMS. The EMS harness has two sets of blue and green wires for DSAB in case you want to use tie two EFISs and one EMS together. I removed both sets of DSAB wiring from pins 34, 35, 36, 37 on the EMS connector. Then I ran the DSAB wires from the EFIS pins 4 and 5 to the EMS connector pins 34 and 35. This made a neat installation without having to splice any wires. The DSAB wires are on the bottom of the connector in the picture.



















The next step was to wire the serial to parallel converter box for the blind encoder for the transponder. The Dynon EFIS has a serial encoder output but it wont work with the Garmin GTX-320A transponder. Dynon makes a little converter box to change the serial output to parallel (gray code) so it will work with the transponder.
The converter is much smaller than the altitude encoder it replaces which frees up a lot of room behind our panel.














I already had a 15 pin D sub female connector on the transponder cable, so I went to Frys Electronics and got a 15 pin D sub male connector and pins.
The label on the old altitude encoder has the wiring diagram on it so it was a simple matter of stripping about 1/8 in off each lead, crimping a D sub male pin on each wire.














Each wire is then inserted into the 15 pin male connector.














The next step was to run the 20 ft shield cable for the magnetometer from the Dynon EFIS.












The magnetometer needs to be installed someplace where it is not influenced by metal objects around it. A suggested location is the wing tip. However, we have extended range fuel tanks and strobe power supplies in each wing and tip. We decided to run the wire back into the fuselage and install the magnetometer in one of the back bulkheads.