AppendixA ConnectorDescriptions
SerialHardware and Software for Windows A-2 ni.com
Forinformation about setting the transceivermode for two-wire
communication,refer to Chapter 6,Using Your Serial Hardware.Formore
information about duplex architectures, refer to Appendix B, Serial Port
Information.
DB-9 Connector
FigureA -1 and TableA-1 give the pin locations and descriptions of the
DB-9 connector,the 10-position modular jack to DB-9 cable, the cable
adapter for the eight-port board, and the DB-9 connectors to the 16-port
breakoutbox.
FigureA-1. DB-9 Connector Pin Locations
TableA-1. DB-9 Pin Descriptions
DB-9 Pin 232 Signal 485Signal
1DCD* GND
2RXD CTS+ (HSI+)
3TXD RTS+(HSO+)
4DTR* RXD+
5GND RXD–
6DSR* CTS–(HSI–)
7RTS RTS–(HSO–)
8CTS TXD+
9RI* TXD–
*These signals are not supported by the isolated 232 boards or ports 9-16 of the RS-232
sixteen-portboard.
PIN 1
PIN 9
PIN 5
PIN 6