Matrix Orbital VFD2041 Legacy - Manual (Page 8)

VFD2041 rev 2 8
Connector pinout is as follows:
1 2 3 4
Figure 2-2 Power connector
Pin 1 +5.0 VDC (+8 to +15 VDC with wide voltage option)
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 VFD2041 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 VFD2041 are different as shown in Figure 2-3
below.
PC wiring
Display module wiring
+5 V
+5 V
GND
GND
+12 V
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 VFD2041 when it's installed in a PC. The cable is wired as shown in Figure 2-4 below. Note
that this cable does not provide connections for I
2 C.
Figure 2-4 Five volt Power Cable