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Chapter 1
Introduction
Caution
To meet FCC emission limits for this device, you must use a Type X2
double-shielded GPIB cable. If you operate this equipment with a non-shielded cable,
it may interfere with radio and television reception.
GPIB-232CT-A Hardware Overview
GPIB-485CT-A Hardware Overview
GPIB-232/485CT-A for Windows
If you have a DC version, one of the following DC power supplies,
which is included in your kit:
–
Wall-mount power supply (100–120 VAC, 9 V, 1 A)
–
Desktop power supply (220–240 VAC, 9 V, 1 A)
One of the following shielded cables, compatible with IBM PC, which
you can purchase from National Instruments:
–
RS-232 DTE-to-DTE cable (1, 2, or 4 m) for the GPIB-232CT-A
–
RS-485 null-modem cable (1, 2, or 4 m) for the GPIB-485CT-A
Type X2 double-shielded GPIB cable (1, 2, or 4 m), which you can
purchase from National Instruments
The GPIB-232CT-A is a high-performance serial-to-GPIB interface. It
enables a computer with an RS-232 serial port to be a Talker, Listener, or
Controller on the GPIB. The GPIB-232CT-A is also capable of interfacing
RS-232 instruments and peripherals to the GPIB.
The GPIB-232CT-A has all the software and logic required to implement
the physical and electrical specifications of the IEEE 488 and RS-232
standards. It can interpret and execute high-level commands that you send
to it over the serial port, and perform GPIB-to-RS-232 protocol conversion.
The GPIB-232CT-A also conforms to all versions of the IEEE 488
standard, including IEEE 488.2. The NAT4882 Controller chip implements
all IEEE 488 Talker/Listener/Controller functionality.
The GPIB-485CT-A is a high-performance serial-to-GPIB interface. It
enables a computer with an RS-485 serial port to be a Talker, Listener, or
Controller on the GPIB. The GPIB-485CT-A is also capable of interfacing
RS-485 instruments and peripherals to the GPIB. The GPIB-485CT-A does
not support any multi-drop protocols.
The GPIB-485CT-A has all the software and logic required to implement
the physical and electrical specifications of the IEEE 488 and RS-485
1-2
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