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Connect Tech Xtreme/104-Express User Manual
Revision 0.00
13
Table 2: DB-9 Male Pinouts
Pin # RS-232 RS-422/485
DB-9 Signal Direction Signal Direction
1 DCD Input RxD+ Input
2 RxD Input
RxD- Input
3 TxD Output TxD+ Output
4 DTR Output TxD- Output
5 SG Signal Ground SR Signal Reference
6 DSR Input CTS- Input
7 RTS Output RTS+ Output
8 CTS Input CTS+ Input
9 RI Input RTS- Output
Figure 4: RS-422/485 Wiring Diagram
D
6
1
DB-9 Male
5
9
Xtreme/104
-
Express
Adapter
RTS +
RTS
-
CTS +
CTS
-
TxD +
TxD -
RxD +
RxD
-
RxD +
TxD +
RxD
-
TxD
-
RTS
-
CTS
-
RTS +
CTS +
SR
SR
Xtreme
/
104
-
Express
Adapter
RS
-
485/422
Peripheral
3
1
4
2
5
6
9
7
8
RTS +
RTS
-
CTS +
CTS
-
TxD +
TxD -
RxD +
RxD
-
RxD +
TxD +
RxD
-
TxD
-
RTS
-
CTS
-
RTS +
CTS +
SR
SR
BlueStorm/Express
Opto
Adapter
RS
-
422/
485
Peripheral
3
4
2
5
6
9
7
8
1
RS
-
422/485
4 Wire Diagram