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2.4. Pin Assignment
This chapter provides the pin assignment of PCI Express Industrial I/O Control
Board, as well as the pin assignment for the optional accessories.
RS-232/422/485 Pin Assignment
(SDC4880B only)
DB9M
RS-232
RS-422
RS-485
1
DCD
Tx -
Data -
2
RxD
Tx +
Data +
3
TxD
Rx +
4
DTR
Rx -
5
GND
GND
GND
6
DSR
7
RTS
8
CTS
9
RI