Matrix Orbital GLT240128 Legacy - Manual (Page 9)

• 128 byte buffered communication
• 16 KB flash memory for fonts and bitmaps
• Lightning fast communication speeds, up to 115 kbps for Serial and 100 kbps for I
2 Cprotocol
• * Use of up to 127 modules on the same 2 wire I 2 C interface
• Display text using built in or user supplied fonts
• Software adjustable contrast and backlight brightness
• Default 19.2 kbps serial communication speed
• Extended voltage, and efficient power supply available
1.4 Connecting to a PC
The GLT240128 connects seamlessly to a PC and it is an excellent means of testing the functionality
and uploading new fonts and bitmaps. For the Non-USB version, you will require a standard RS-232 9-pin
serial cable such as the one pictured in Figure 7, as well as a modified 5V or 12V power adapter, depending
on the voltage model, such as the ones pictured in Figures 2 and 3. For the USB model, of course, all you
will need is a USB to mini USB cable such as the one in Figure 4.
1.4.1 Connection for Non-USB Modules
In order to connect your Non-USB display to a personal computer follow these easy instructions:
1. Plug the serial cable into the com port you wish to use.
2. Connect the appropraite modified power adapter to a power lead from your PC power supply (you will
have to open your computer case).
3. Connect the serial cable to the DB-9 connector on the back of the display.
4. Connect the appropriate power adapter to the 4-pin connector on the back of the display.
WARNING DO NOT use the standard floppy drive power connector on
the Power/Data Connector, as this will not provide you with the correct
voltage and will damage the display module.
Matrix Orbital GLT240128 4