Table E-1. Rs-232 Serial Port Signal Configuration - National Instruments GPIB-232CT-A Getting Started

Interfacing to a Serial Device

Table E-1. RS-232 Serial Port Signal Configuration

Pin Signal
Number Description
2
(Receive
3
(Transmit
4 DTR (Data
Terminal
Ready)
5
(Ground)
7
(Request to
Send)
8 CTS (Clear
to Send)
GPIB-232CT-A for MS-DOS/Windows E-2
RS-232
Code
RXD BB
Data)
TXD BA
Data)
CD
GND AB
RTS CA
CB
Function
This signal carries serial data from
the serial device to the
GPIB-232CT-A.
This signal carries serial data from
the GPIB-232CT-A to the serial
device.
This signal is asserted by the
GPIB-232CT-A to signal that it has
been powered on and is ready to
operate.
This signal establishes a reference
point for all interface voltages.
This signal is driven by the
GPIB-232CT-A. When asserted, it
indicates that the GPIB-232CT-A is
ready to accept serial data. When
unasserted, it indicates that the
GPIB-232CT-A is no longer ready
to accept serial data because the
buffer is full.
This signal is sensed by the
GPIB-232CT-A. When asserted, it
indicates that the serial device is
ready to accept serial data. When
unasserted, it indicates that data
transmission should be disabled.
© National Instruments Corp.
Appendix E