March Products 120 III (PC620) user manual Dcd Dsr Rxd Rts Txd Cts Dtr Gnd Vcc

User Manual version 2503

4.1.5.10. COM3

COM 3 is an internal RS-232 reserved for touchscreen. Its corresponding pin assignment is listed as below;

Pin #	Signal	Pin #	Signal
1	DCD	2	DSR
3	RXD	4	RTS
5	TXD	6	CTS
7	DTR	8	RI
9	GND	10	VCC

4.1.5.11.CD1: CD Audio IN

Pin # Signal

1 Left channel

2 CD GND

3 CD GND

4 Right channel

4.1.5.12.IR1: IR/CIR Connector

IR

Pin # Signal

15V

2NC

3IRRX

4GND

5IRTX

6CIRRX

LIBRA 120 III (PC620 Intel 815E) 4-59

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