Chapter 2 Installation and Verification
© National Instruments Corporation 2-9 PCI Serial for Windows Me/9x
Modular Jack Connector
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-Position
Modular Jack Pin 232 Signal 485 Signal
10 DCD* GND
9RXD CTS+ (HSI+)
8TXD RTS+ (HSO+)
7DTR* RXD+
6GND RXD–
5DSR* CTS– (HSI–)
4RTS RTS– (HSO–)
3CTS TXD+
2RI* TXD–
1No Connect No Connect
* These signals are not supported by the isolated 232 ports.
Pin 10Pin 1