Matrix Orbital GLK24064-25 Legacy - Manual (Page 10)

Table 2: Connector Pinout
Pin 4 Ground
Pin 3 SDA (I 2 C data) / Rx
Pin 2 SCL (I 2 C clock) / Tx
Pin 1 Vdc
2.1.1 Power Connection (4 pin header)
Power is applied via pins 1 and 4.
Power requirement is;
• +5Vdc ±0.25V on standard voltage units
• +7Vdc to +30Vdc with Wide Voltage and Efficient Switching Power supply (-VPT).
Figure 4: Power Connector
2.1.2 Five Volt Power Cable
If a display module 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 module are different as shown
in the Figure below.
Figure 5: Wiring for Five Volt Modules
Matrix Orbital GLK24064-25 6