RS-232 DB25 Connector Information Table

This table is the pin information for the connector. This is the industry standard for RS-232 serial communications. You may also wish to see our detailed pin view of the DB9 connector.

DB-25M	Function	Abbreviation
Pin #1	Chassis/Frame Ground	GND
Pin #2	Transmitted Data	TD
Pin #3	Receive Data	RD
Pin #4	Request To Send	RTS
Pin #5	Clear To Send	CTS
Pin #6	Data Set Ready	DSR
Pin #7	Signal Ground	GND
Pin #8	Data Carrier Detect	DCD or CD
Pin #9	Transmit + (Current Loop)	TD+
Pin #11	Transmit - (Current Loop)	TD-
Pin #18	Receive + (Current Loop)	RD+
Pin #20	Data Terminal Ready	DTR
Pin #22	Ring Indicator	RI
Pin #25	Receive - (Current Loop)	RD-

Version 1.0.1

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