EIA-232 PC Terminal Emulator Cables, DB-25 to DB-9

The wiring diagram for a DB-25 to DB-9 PC terminal emulator cable is shown in Table 1.

Table 1:  EIA-232 DB-25 to DB-9 PC terminal emulator cable

From Port DB-25	Signal	Direction	Signal	To Term/Prn DB-9
6	DSR		DTR	4
8	DCD
3	RxD		TxD	3
2	TxD		RxD	2
20	DTR		DSR	6
			DCD	1
7	SG		SG	5
4	RTS		CTS	8
5	CTS		RTS	7
Shell	GND		GND	Shell

NOTES:

• Altpin should be turned off when using this cable.
• This cable utilizes the RTS signal of the PC terminal emulator for hardware flow control (RTS/CTS).
• EIA-232 cables cannot exceed 2500pF.  For information about calculating capacitance of your cable, click here.
• For information regarding the EIA-232/EIA-422/EIA485 specifications, click here.