© National Instruments Corp.
B-1
GPIB-232CV User Manual
Appendix B
Interfacing to a Serial Device
This appendix contains information about the RS-232 port and how to
connect the GPIB-232CV to your serial device. This information is useful
if you want to build your own serial cable
The GPIB-232CV transfers serial data using the electrical signals, the
mechanical connections, and the data format and control protocols as
defined in the RS-232C standard. The RS-232 port on the GPIB-232CV
provides an asynchronous serial communication link to the host serial
peripheral device. The RS-232 connector is located on the rear panel of the
GPIB-232CV.
The RS-232C Standard
The RS-232C standard (international standard CCITT V.24) was
formulated in 1969 largely from the efforts of the Electronic Industries
Association (EIA) and Bell Laboratories. The standard describes the
electrical specifications and arrangement of control and data signals on both
sides of a serial communications interface. Its original intent was to
interface terminals to modems. Many manufacturers of computers and
instruments have adopted the standard for their serial communications
needs. For more information on the RS-232 standard, contact
Global Engineering Documents
2805 McGaw Avenue
Irvine, CA 92714
(714) 261-1455
The RS-232C Serial Port
The RS-232 serial port on the GPIB-232CV uses a female 25-pin
D-subminiature connector with a DTE (Data Terminal Equipment) interface
configuration. That is, the GPIB-232CV transmits data on pin 2 and
receives data on pin 3. Table B-1 shows the signal lines supported on the
GPIB-232CV.
Summary of Contents for GPIB-232CV
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