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Chapter 2 Installation 27
RS-232/422/485 serial port connections
(COMA, COMB)
Pin assignments
The following table shows the pin assignments for the card's
RS-232 and RS-422/485 (COMB) serial port connectors:
RS-232 (COMA, COMB)
RS-422/485 (COMB)
Pin
Signal
Pin
Signal
1
DCD
1
TX- (DTE)
2
RX
2
TX+ (DTE)
3
TX
3
RX+ (DTE)
4
DTR
4
RX- (DTE)
5
GND
5
Ground
6
DSR
6
RTS-
7
RTS
7
RTS+
8
CTS
8
CTS-
9
RI
9
CTS-
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