3-4
IM WT310E-17EN
RS-232 Standard Signals and Their JIS and CCITT Abbreviations
Pin No.
Abbreviation
Name
(9-pin connector) RS-232
CCITT
JIS
5
AB (GND)
102
SG
Signal ground
3
BA (TXD)
103
SD
Transmitted data
2
BB (RXD)
104
RD
Received data
7
CB (CTS)
105
RS
Request to send
8
CA (RTS)
106
CS
Clear to send
Signal Wiring Example
The pin numbers are for the 9-pin connector.
In general, use a crossover cable.
SD
RD
RS
CS
SG
SD
RD
RS
SG
CTS-RTS (CS-RS)
PC
WT
CS
2
3
8
7
5
2
3
8
7
5
SD
RD
RS
CS
SG
SD
RD
RS
SG
OFF-OFF / XON-XON
PC
WT
CS
2
3
8
7
5
2
3
8
7
5
Connection Procedure
Connect the cable as shown below.
WT310E/WT310EH
WT332E/WT333E
3.3 Connecting to the RS-232 Interface