Matrix Orbital VK204-25 Legacy - Manual (Page 15)

Pin 1 PWR (See table 1)
Pin 2 Rx \ SCL (I 2 C clock)
Pin 3 Tx \ SDA (I 2 C data)
Pin 4 GND
Figure 16: Power Connector and Pin out
Table 1: Power Requirements
Standard -V -VPT
Supply Voltage +5Vdc ±0.25V +9V to +15V +9V to +35V
Supply Current 148 mA typical
Inrush 148 mA
WARNINGS
• Do not apply any power with reversed polarization.
• Do not apply any voltage other than the specified voltage.
2.3 Protocol Select Jumpers
The Protocol Select Jumpers, pictured below in figure 17 , 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 solder jumps on the 232 jumpers. In order to place the display module in I 2 C mode you must first
remove the solder jumps from the 232 jumpers and then place them on 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. Similarly, in order
to change the display to TTL mode, simply remove the zero ohm resistors from the 232 or I 2 C jumpers and
solder them to the TTL jumpers.
Matrix Orbital VK204-25 11