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Pin Signal
1 N/C
2 Data+
3 Data-
4 N/C
5 GND
6 N/C
7 N/C
8 N/C
9 N/C
Figure 3.8 I/O Board COM4(RS-485) serial port
CN 2 : Audio (Line-out) port
Pin Signal
1 Right channel
2 Left channel
3 GND
4 Left channel
Figure 3.9 I/O Board Audio(Line-out) port
CN 5 : RJ-45 for Ethernet port