Advantech PCL-849 manual Rts Cts Gnd Dsr Dtr Dcd

Modem connections

DB-25 Male: PCL-849		Modem (DCE)
Pin	Signal	Pin	Signal
2	TxD	2	RxD
3	RxD	3	TxD
4	RTS	4	CTS
5	CTS	5	RTS
6	DSR	6	DTR
7	GND	7	GND
20	DTR	20	DSR
8	DCD	8	DCD

For DTE to DCE connections, use straight through cable (i.e., you don't have to reverse lines 2 and 3, lines 4 and 5, and lines 6 and 20 since, in general, the DCE RS-232 interfaces are reversed them- selves).

Terminal without handshake

	DB-25 Male: PCL-849			Terminal, PC (DTE)
	Pin	Signal		Pin	Signal
	2	TxD		3	RxD
3		RxD		2	TxD
4		RTS	—
5		CTS	—
7		GND		7	GND
6		DSR	—
20		DTR	—
8		DCD	—

2 8 PCL-849 User's Manual