AppendixA ConnectorDescriptions
©NationalInstruments Corporation A-3 SerialHardware and Software for Windows
Modular Jack Connector
FigureA -2 and TableA-2 give the pin locations and descriptions of the
10-position modular jack.
FigureA-2. 10-PositionModular Jack Pin Locations
TableA-2. 10-PositionModular 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.
Pin10Pin1