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Appendix A Connector Descriptions
© National Instruments Corporation A-3 Serial Hardware and Software for Windows
Modular Jack Connector
Figure A-2 and Table A-2 give the pin locations and descriptions of the
10-position modular jack.
Figure A-2.
10-Position Modular Jack Pin Locations
Table A-2.
10-Position Modular Jack Pin Descriptions
10-Position
Modular Jack Pin
232 Signal 485 Signal
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 10Pin 1