B&B Electronics RS-422 manual Appendix B Connector Pinouts, DB9 Pin DB25 Pin

Appendix B: CONNECTOR PINOUTS

Table B.1: RS-232 Pinouts

Name	Description			Direction		DB9M
				(DTE)		Pin
DCD	Data Carrier Detect			Input		1
RD	Receive Data			Input		2
TD	Transmit Data			Output		3
DTR	Data Terminal Ready			Output		4
GND	Signal Ground			------		5
DSR	Data Set Ready			Input		6
RTS	Request to Send			Output		7
CTS	Clear to Send			Input		8
RI	Ring Indicator			Input		9
Table B.2: RS-232 DB9 to DB25 Conversion Cable
		Name	DB9 Pin		DB25 Pin
			(DTE)		(DTE)
		DCD	1		8
		RD	2		3
		TD	3		2
		DTR	4		20
		GND	5		7
		DSR	6		6
		RTS	7		4
		CTS	8		5
		RI	9		22
		Chassis	Shield		1
		GND	(DB9
			Shell)

Documentation Number 3PCIO1-0903 Manual Appendix B B -1

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