Matrix Orbital LK202-25 Legacy - Manual (Page 14)

Table 4: RS-232 Pinout
Pin Number Direction Description LCD Host
2 Data from LCD Data out (LCD) Tx Rx
3 Data to LCD Data in (LCD) Rx Tx
5 - Ground gnd gnd
5 3 2
9
Figure 10: DB9 Pinout
For RS232 communication via the 4 pin connector, please see the figure and table below.
Table 5: Connector Pinout
Pin 1 +5.0 VDC (+7 to +15 VDC with wide voltage option)
Pin 2 Rx
Pin 3 Tx
Pin 4 Ground
1 2 3 4 1 2 3 4
Figure 11: Power Connector
Matrix Orbital LK202-25 10