Matrix Orbital LCD/VFD Legacy - Manual (Page 8)

Connector pinout is as follows;
Figure 4: Power Connector
Table 3: Connector Pinout
Pin 4 Ground
Pin 3 SDA (I 2 C data)
Pin 2 SCL (I 2 C clock)
Pin 1 +5.0 VDC (+7 to +15 VDC with wide voltage option)
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 5: Wiring for 5V Modules
Matrix Orbital can supply an adapter cable designed to use with the display when it’s installed in a PC.
The cable is wired as shown in the Figure below.
NOTE This cable does not provide connections for I 2 C.
Matrix Orbital LCD4041 5