Matrix Orbital VK204-25 Legacy - Manual (Page 9)

2.1.2 Five Volt Modules
If the display is used in a PC it becomes tempting to plug a spare power connector into the unit. Don’t
do this! Wiring for the PC power connector and that required for the display are different as shown in the
Figure below.
Figure 4: Wiring for 5V Modules
Matrix Orbital can supply an adapter cable designed for use with the display when it’s installed in a PC.
The cable is wired as shown in the Figure below.
NOTE This connector does not provide connections for I 2 C.
Figure 5: 5V Power Cable
2.1.3 Wide Voltage Range Modules
NOTE Do not use this cable unless the display module has the "Wide voltage range"
option (option V). Use of the 12 volt power cable with 5 volt modules will damage the
module.
The 12 volt power cable is designed for use with wide voltage range display modules mounted in a PC.
Wiring required for the 12 volt power connector is shown in the Figure below.
Matrix Orbital VK204-25 6