How to build a serial cable
Serial Cable
Nb to pc
PC RS232(9 PIN) Signals
1 2 3 4 5
6 7 8 9
1 DCD Data Carrier Detect
2 RXD Receive Data (a.k.a RxD, Rx)
3 TXD Transmit Data (a.k.a TxD, Tx)
4 DTR Data Terminal Ready
5 GND Ground
6 DSR Data Set Ready
7 RTS Request To Send
8 CTS Clear To Send
9 RI Ring Indicator
NB Signals
1 DATA IN
2 CTS
3 POL. (Not USED)
4 DATA OUT
5 RTS
6 GND
Connections
PC Pin NB PIN
1
2(RXD) 4(Data out)
3(TXD) 1(Data in)
4(DTR)
5(GND) 6(GND)
6(DSR)
7(RTS) 2(CTS)
8(CTS) 5(RTS)
9