11
Serial Port Pin Specifications
RS-232
TXD
RXD
CTS
RTS
DSR
5
4
3
2
1
9
8
7
6
DTR
GND
* CS-LAN is a DCE (Data Communications Equipment) converter that is directly connected to DTE equipment such as PC.
Pin No.
Signal
Description
2
RXD
Receive Data (Input)
3
TXD
Transmit Data (Output)
4
DTR
Data Terminal Ready (Output)
5
GND
Ground
6
DSR
Data Set Ready (input)
7
RTS
Request to Send (Output)
8
CTS
Clear to Send (Input)
