Matrix Orbital LK202-25 Legacy User Manual
Page 16
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Table 7: Connector Pinout
Pin 1
+5.0 VDC (+7 to +15 VDC with wide voltage option)
Pin 2
Rx (receive data)
Pin 3
Tx (transmit data)
Pin 4
Ground
2.2.3 I
2
C Communications
The display’s I
2
C communications runs at 100 Kbps and supports up to 127 units on a single commu-
nications line. The I
2
C data line operates on 5 volt CMOS levels. One modification is required for I
2
C
communication. Please see figure below for appropriate modification. The jumps must be removed from the
RS232 selection and placed on the I2C selection.
Figure 14: I2C Select
For I
2
C communication, a connection must be made via the 4 pin connector as per the figure and table
below.
1 2 3 4 1 2 3 4
Figure 15: Power Connector
Matrix Orbital
LK202-25
12
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