Mounting & wiring
Hours: 4.3 | Posted in ElectricalDecided to go ahead and provision the mounting points for the ADS-B box above the VP CU. I offset the mounting points to the left side, so the units are not centered on one another, to give a better mounting geometry. Two of the bolts for the ADS-B will also penetrate the VP mounting bracket, which will clamp it down even more; those two will need to be removed to remove the VP CU, but the other two will hold the ADS-B box in place while it’s out. Seemed like a reasonable compromise deal, so it’s done. Of course, done in this case just means that the holes are drilled & deburred, and a template made for future use. The nutplates will be installed on the mounting brackets of the box, with hex head screws capturing it from below. I have tried to install everything forward of the subpanel with a mind toward working on it laying under there on my back…no fasteners that need to be access from the top, nothing should needs in-situ soldering to remove, and so forth.
That figured out, I went on wiring the feeds to and from the box; serial to the AFS screen, encoded altitude, antennas, and a serial service port. I’ll need to order another minijack for the service port connection. Ran the power and ground wires, which were the last of the power system wiring, so I started tying up those cable paths.
Spent some time working on a distribution “manifold” for GPS signals from the 430, which need to go several places, and the encoded altitude signals (aka Icarus) from the AFS, which also go several places. Wired up a 15-pin D-sub with a series of jumpers to give 4 points for GPS and 3 points for Icarus, and began wiring it in.
