Further thoughts on the connectorisation

After consideration, the connector system can be simplified. It turns out the only HDP20 connectors readily available are the HDP20 24-47. The reason why Connectors 2 and 3 were chosen different was so the plugs could not be swapped. This same effect can be achieved by using keying pins. So the HDP20 24-47 is used throughout.

Also, connector 3 can be eliminated. All the lines not going to the EMS as thermocouples or sensors are moved onto connectors 1 and 2. Connector 3 is then eliminated entirely, by making a loom that goes to a DB25 and D37 that simply plugs straight into the EMS220.

The EMS220 could then even be mounted in the fuselage, leaving only the need for a Dynon network connection (DB9) to the panel. It is just as convenient however to have the EMS220 attached to the tray option for the HDX1100, which can also hold the ADAHRS, backup battery.

The AHAHRS should also be attached to the HDX1100 tray since the air lines will also need to go to the D30.

The transponder and com radio can also be attached to the panel or the fuselage just as readily, connected to the panel via their DB25 connectors. If mounted on the fuselage, the need to make the coax TNC connections readily removeable is eliminated.

The pages

Panel connector 1 - HDP20 24-47 - We Build Planes

Panel connector 2 - HDP20 24-33 - We Build Planes

Panel connector 3 - HDP20 24-35 - We Build Planes

will,be modified accordingly

Connector 4 will also be modified. This will no longer be panel-mounted in the console. The 8 way HDP20 18-8 connectors are hard to obtain with E seals. Instead one or to DTP 4 way cable connectors will be employed.

Panel connector 4 - HDP20 18-8 - We Build Planes