Table 1: Power Requirements
Standard -V -VPT
Supply Voltage +5Vdc ±0.25V +9V to +15V +9V to +35V
Supply Current 31 mA typical
Supply Backlight Current 160 mA typical
WARNINGS
• Do not apply any power with reversed polarization.
• Do not apply any voltage other than the specified voltage.
2.2.1 Legacy Data Connector Jumpers
To reverse pins two and three of the Power/Data Connector remove the zero ohm resistors from the
Legacy Data Connector Jumpers, labeled with the = symbol and place them on the jumpers labeled with
the X symbol. This will allow you to transmit on pin two, and receive data on pin three as pictured in figure
15 below.
Power/Data Connector
=[
Pin 2 Rx \ SCL (I
2
C clock)
Pin 3 Tx \ SDA (I
2
C data)
x[
Pin 2 Tx \ SDA (I
2
C data)
Pin 3 Rx \ SCL (I
2
C clock)
Figure 15: Legacy Data Connector Jumpers
2.3 Protocol Select Jumpers
The Protocol Select Jumpers, pictured below in figure 16, provide the means necessary to toggle the
display module between RS-232, TTL and I
2
C protocols. As a default, the jumpers are set to RS-232 mode
with zero ohm resistors on the 232 jumpers. In order to place the display module in I
2
C mode you must
first remove the zero ohm resistors from the 232 jumpers and then solder the resistors on to the I2C jumpers.
The display will now be in I
2
C mode and have a default slave address of 0x50 unless it has been changed.
Matrix Orbital GLK24064-25 10
