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Chapter 3 Pin Assignment
UPort DB9 Pin Assignments
The UPort 1100 series uses male DB9 connectors. Pin assignments are shown in the following
diagram:
DB9 (male) Pin RS-232
RS-422 4-wire
RS-485
2-wire RS-485
1 DCD (in) TxD-(A)
-
2 RxD (in) TxD+(B)
-
3 TxD (out) RxD+(B) Data+(B)
4 DTR (out) RxD-(A) Data-(A)
5 GND GND GND
6 DSR (in)
- -
7 RTS (out)
- -
15
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8 CTS (in)
- -
Terminal Block Pin Assignments
The UPort 1130/1150/1150I comes with a DB9 to terminal block converter, with pin assignments
as shown below:
Terminal Block Pin
RS-422 4-wire
RS-485
2-wire RS-485
1 TxD+(B)
-
2 TxD-(A)
-
3 RxD+(B) Data+(B)
4 RxD-(A) Data-(A)
5 GND GND
Note that the converter maps pin 1 on the DB9 connector to pin 2 on the terminal block, and pin 2
on the DB9 connector to pin 1 on the terminal block.