Appendix E
Interfacing to a Serial Device
© National Instruments Corp.
E-3 GPIB-232CT-A for MS-DOS/Windows
Interfacing Serial Devices to the RS-232
Serial Port
To interface other serial devices to the RS-232 serial port on the
GPIB -232CT-A, first refer to the manual that came with your serial device
to determine if the device is configured as a DTE or DCE. Also, determine
from the manual how the control lines are used and whether they must be
driven for the serial port to operate.
Note : The GPIB-232CT-A serial port is configured to be a DTE.
Figure E-1 shows the location of the RS-232 connector.
POWER READY TALK LISTEN SRQ
AT
N
GPIB-232CT-A
IEEE 488 Controller
RS-232
NATIONAL
INSTRUMENTS
RS-232 Connector
GPIB Connector
DC Power Jack
(DC version only)
Figure E-1. Location of the RS-232 Connector
Interfacing the GPIB-232CT-A to a DCE with
Handshaking
A correctly configured DTE-to-DCE interface is wired straight across :
GPIB-232CT-A TXD to DCE TXD, GPIB-232CT-A RXD to DCE RXD,
and so on as shown in Table E-2.