Matrix Orbital VK202-25 Legacy - Manual (Page 9)

VK202-25 rev. 05 9
Pin 2 SCL (I 2 C clock)
Pin 3 SDA (I 2 C data)
Pin 4 Ground
2.1.1.1 Five Volt Modules
If the VK202-25 is used in a PC it is 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 VK202-25 are different as shown in Figure 2-3
below.
Figure 2-3 Power Connector wiring differences
If you don't want to modify cable wiring yourself, Matrix Orbital can supply an adapter cable designed to
use with the VK202-25 when it's installed in a PC. The cable is wired as shown in Figure 2-4 below. Note
that this connector does not provide connections for I
2 C.
Figure 2-4 Power Adapter Cable
2.1.1.2 Wide Voltage Range Modules
Note: Do not use this cable unless your 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 Figure 2-5 below.