RS232 Pinouts, How to wire an RS232 EIA/TIA port, RS-232, rs232

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RS232 Pinouts
Please find pin assignments for the RS-232 EIA/TIA standard using DB9 or DB25 connectors. This table and diagrams will help you in identifying what pin numbers are assigned to each pin inside the different connectors.

RS-232 Pinout Information
RS-232 (EIA-232-A) Function	DB-25 pin	DB-9 pin
Shield	1
Transmit Data (TD) from DTE to DCE	2	3
Receive Data (RD) from DCE to DTE	3	2
Request to Send (RTS)	4	7
Clear to Send (CTS)	5	8
DCE Ready (DSR)	6	6
Signal Ground (SG)	7	5
Received Line Signal Detector (DCD)	8	1
DTE Ready (DTR)	20	4
Ring Indicator	22	9

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