DCE

DCE - RS-232 to TTL

The DTE (PC) has the male connector, and the DCE (peripheral) has the female.

https://www.db9-pinout.com/db9-pinout/db9-pinout.gif

Pin	SIG.	Signal Name		DTE (PC)
1	DCD	Data Carrier Detect	in
2	RXD	Receive Data		in
3	TXD	Transmit Data		out
4	DTR	Data Terminal Ready	out
5	GND	Signal Ground		-
6	DSR	Data Set Ready		in
7	RTS	Request to Send		out
8	CTS	Clear to Send		in
9	RI	Ring Indicator		in

DeE Assembly Sheet

• DCE Assembly Sheet