Matrix Orbital GLK240128-25 Legacy - Manual (Page 13)

WARNING Do not apply voltage through pin 9 of the DB-9 connector
AND through the Power/Data Connector at the same time.
2.2 Power/Data Connector
The Power/Data Connector provides a standard connector for powering the display module. The GLK240128-
25 requires five volts for the standard display module, between nine to fifteen for the wide voltage (V) and
between nine to thirty-five volts for the wide voltage with efficient power supply module (VPT). The volt-
age is applied through pins one and four of the four pin Power/Data connector. Pins two and three are
reserved for serial transmission, using either the RS-232/TTL or the I
2 C protocol, depending on what has
been selected by the Protocol Select Jumpers. Pins two and three may be reversed by changing the Legacy
Connector Jumpers in order to be compatible with previous PCB revisions.
Pin 1 PWR (See table ?? on page ??)
Pin 2 Rx \ SCL (I 2 C clock)
Pin 3 Tx \ SDA (I 2 C data)
Pin 4 GND
Figure 14: Power Connector and Pin-out
WARNINGS
• Do not apply any power with reversed polarization.
• Do not apply any voltage other than the specified voltage.
Matrix Orbital GLK240128-25 8