Matrix Orbital LCD2041 - Manual (Page 12)

Pin 2 Tx \ SDA (I 2 C data)
Pin 3 Rx \ SCL (I 2 C clock)
Pin 5 GND
Pin 9 PWR (Must solder Power Through DB-
9 Jumper. See table 1 on page 10 for
power requirements.)
Figure 13: RS-232 Pin out
2.1.1 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 14 below. The LCD2041 allows all voltage models to use the
power through DB-9 option, see table 1 on page 10 for display module voltage requirements.
Matrix Orbital LCD2041 8