National Instruments 3.22E+04 用户手册

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Figure 2-6 and Table 2-2 give the pin locations and descriptions of the 
10-position modular jack, which is on the four-port PCI serial board.

Figure 2-6.  10-Position Modular Jack Pin Locations

Table 2-2.  10-Position Modular Jack Pin Descriptions

10

DCD*

GND

9

RXD

CTS+ (HSI+)

8

TXD

RTS+ (HSO+)

7

DTR*

RXD+

6

GND

RXD–

5

DSR*

CTS– (HSI–)

4

RTS

RTS– (HSO–)

3

CTS

TXD+

2

RI*

TXD–

1

No Connect

No Connect

* These signals are not supported by the isolated 232 ports.

Pin 10

Pin 1