Wi232/WiUSB User Guide
1-5
1.4 Serial RS232 Interface
The table below lists the RS232 signals for the Wi232. The RS232 interface is a 9-pin Male D-style
connector (DB9M), configured as a DTE device. DCE configured devices are also available on special
order.
Table 1 - RS232 Signals
Wi232 Signal
Direction
DTE DB-9 Male
Pin #
DCE DB-9
Female Pin #
Data Out (TXD)
Out
3
2
Data In (RXD)
In
2
3
Ground
5
5
RTS
In
8
7
CTS
Out
7
8
DTR
Use J5 to
jumper 4-6
4
6
DSR
Use J5 to
jumper 4-6
6
4
Note: J5 is used to jumper cable pins 4 to 6, which ties DTR to DSR. To locate J5, open the case by removing the two
screws. Use the drawing below to locate the jumper.
J5
J5 is used to tie DSR
to DTR. Used only with
a wired cable. Signals
are NOT available on the
option header.
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