National Instruments 3.22E+04 Benutzerhandbuch
Chapter 2
Installation and Verification
2-8
ni.com
DB-9 Connector
Figure 2-5 and Table 2-1 give the pin locations and descriptions of the
DB-9 connector, which is on the two-port PCI serial board, the 10-position
modular jack to DB-9 cable, the cable adapter for the eight-port board, and
the DB-9 connectors to the sixteen-port breakout box.
DB-9 connector, which is on the two-port PCI serial board, the 10-position
modular jack to DB-9 cable, the cable adapter for the eight-port board, and
the DB-9 connectors to the sixteen-port breakout box.
Figure 2-5. DB-9 Connector Pin Locations
Table 2-1. DB-9 Pin Descriptions
DB-9 Pin
232 Signal
485 Signal
1
DCD*
GND
2
RXD
CTS+ (HSI+)
3
TXD
RTS+ (HSO+)
4
DTR*
RXD+
5
GND
RXD–
6
DSR*
CTS– (HSI–)
7
RTS
RTS– (HSO–)
8
CTS
TXD+
9
RI*
TXD–
* These signals are not supported by the isolated 232 boards or ports 9-16 of the RS-232
sixteen-port board.
sixteen-port board.
PIN 1
PIN 9
PIN 5
PIN 6