Matrix Orbital VK204-25 Legacy - Manual (Page 5)

1.4 Setup for Testing
Before setting up the application the user may want to try out the display. This is easily done with a PC.
If not equipped with a dual bay PC mounting kit, the following will be required;
• A 4-pin power connector of the type used to connect 3.5" floppy drive. Take care not to connect the
display to an unmodified spare power connector in a PC.
• A 5V power supply.
• A PC with a spare RS-232 port (COM1 or COM2).
• A 9 or 25 pin RS-232 serial cable. If using a 25 conductor cable, a 9 to 25 pin adapter will be required.
Figure 1: Connections for Testing
1. Refer to the Figure above for the following steps.
2. Wire the connector to the power supply. On most connectors the RED lead will go to +5V and the
BLACK lead to GND.
NOTE The Manufacturer’s Warranty becomes void if the unit is subjected to over-voltage
or reversed polarity.
3. Connect the display to the PC using the serial cable and adapter if required. Make sure the RS-232
cable includes the required ground lead. There must be no voltage differential between the RS-232
ground and the power supply ground.
4. Connect the power connector, making sure that the +5V goes to V+. Turn on the power: the display
should come on.
1.5 Trying Out the VK204-25
The unit should be connected to power. The PC and display should be on. To experiment with typing
text, run a PC terminal program, such as Hyperterm. Make sure it’s configured to use the correct port. Set
Matrix Orbital VK204-25 2