Expansion Port

Update History :
Created on 01/01/2003

External hardware plugs into one of the four ports using DB25 cables. But, I found the difference between manual and actual. This is a very important information for the connection of the additional hardware by user.

According to the manual and WEB Page of the Aerosoft Australia, pin 13 of DB25 connector is assigned as NC. However, in my MCP-747, the voltage of +5V is outputted to the No. 13 pin. If a No. 13 pin is made to short to a ground, a power supply circuit will be damaged. Special attention may be needed for the wiring.

Schematic : exp-cable.pdf (7KB)

For the connection method of a switch and a diode, please refer to the this PDF.

Schematic : sw-matrix.pdf　(19KB)

Just for your reference. This PDF shows the MCP-747's switch connection.

Schematic : sw-board.pdf (11KB)