Matrix Orbital LK162-12 Legacy - Manual (Page 11)

LK162-12 rev 4 11
1 2 3 4
Figure 2-2 Power connector
Pin 1 +5.0 VDC (+7 to +15 Vdc with wide voltage option)
Pin 2 SCL (I 2 C clock) / Tx
Pin 3 SDA (I 2 C data) / Rx
Pin 4 Ground
2.1.1.1 Five Volt Modules
If the LK162-12 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 LK162-12 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 LK162-12 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
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.