用与实现PC机与PLC通讯的RS232电缆线的接法是什么

来源:百度知道 编辑:UC知道 时间:2024/06/27 15:56:59
用于实现西门子S7300/400编程模块和PC机通讯的RS232电缆线,两端都是9孔插头,内部交叉接线,请问是否2和3,3和2交叉接线就可以了?

是的 就当普通232通讯接就好了,如果乐意可以把5脚焊上。下面是定义
Signals
PinNo. Abbreviation Description Input/Output
1 DCD Data Carrier Detect Input
2 RXD Received Data Input
3 TXD Transmitted Data Output
4 DTR Data Terminal Ready Output
5 GND Reference potential (0V)
for all RS232 signals
(Signal Ground)
6 DSR Data Set Ready Input
7 RTS Request to Send Output
8 CTS Clear to Send Input
9 RI Ring Indicator Input
Shield On connector casing*
* The shield is interconnected with the MPI/DP connector via
the adapter casing’s shield and the MPI/DP cable shield

你应该有一个Adapter。