Matrix Orbital GLT240128 Legacy - Manual (Page 16)

Pin 2 RX/SCL (I 2 C clock)
Pin 3 TX/SDA (I 2 C data)
Pin 5 GND
Pin 9 PWR (Must solder power through DB-9 jumper. See table 78
Figure 15: RS-232 Pin-out
2.4 Power Through DB-9 Jumper
In order to provide power through pin 9 of the DB-9 Connector you must place a solder jumper on the
Power through DB-9 Jumper pictured in Figure 16 below. The GLT240128 allows all voltage models to use
the power through DB-9 option, see table 78 for display module voltage requirements.
Figure 16: Power Through DB-9 Jumper
WARNING Do not apply voltage through pin 9 of the DB-9 connector
AND through the Power/Data Connector at the same time.
NOTE We do not recommend that you use pin 9 (Ring Indicator) of the PC to power the
display module. You will have to make a special DB9 cable.
Matrix Orbital GLT240128 11