Matrix Orbital VK204-25 Legacy - Manual (Page 7)

NOTES
• The keypad connector must be wired with columns on one side and rows on the other
side of the center of the connector. If the keypad isn’t wired this way an adapter must
be made or the connector must be rewired to meet this requirement.
• The connector is reversible. Reversing the connector will not damage the keypad or
the display, but will however, change the ASCII character map.
3. Press a key on the keypad. An upper case ASCII character (A-Y) should appear on the PC screen.
Different keys should generate different characters.
To experiment, reverse the connector and see if it generates a more logical set of characters. Ultimately, the
program in the controller will have to ’map’ these characters to the ones marked on the keypad, which will
likely be different.
2 Connections
2.1 Connector Pinout
Refer to the diagram below for this chapter.
Figure 2: Electrical Connections
The display has four connectors;
Matrix Orbital VK204-25 4