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Introduction Chapter 1
PC-DIO-24 User Manual 1-4 © National Instruments Corporation
Register-Level Programming
The final option for programming any National Instruments DAQ hardware is to write register-
level software. Writing register-level programming software can be very time-consuming and
inefficient, and is not recommended for most users.
Even if you are an experienced register-level programmer, consider using NI-DAQ, LabVIEW,
or LabWindows/CVI to program your National Instruments DAQ hardware. Using the NI-DAQ,
LabVIEW, or LabWindows/CVI software is easier than, and as flexible as, register-level
programming, and can save weeks of development time.
Optional Equipment
National Instruments offers a variety of products to use with your PC-DIO-96 board, including
cables, connector blocks, and other accessories, as follows:
• Cables and cable assemblies, shielded and ribbon
• Connector blocks, shielded and unshielded 50-pin screw terminals
• Signal conditioning eXtensions for Instrumentation (SCXI) modules and accessories for
isolating, amplifying, exciting, and multiplexing signals for relays and analog output. With
SCXI you can condition and acquire up to 3,072 channels.
• Low channel count signal conditioning modules, boards, and accessories, including
conditioning for strain gauges and RTDs, simultaneous sample and hole, and relays.
For more specific information about these products, refer to your National Instruments catalog or
call the office nearest you.
Cabling
National Instruments offers cables and accessories for you to prototype your application or to use
if you frequently change board interconnections.
The PC-DIO-96 can be interfaced to a wide range of printers, plotters, test instruments, I/O racks
and modules, screw terminal panels, and almost any device with a parallel interface. The
PC -DIO-96 digital I/O connector is a standard, 100-pin header connector. Adapters for this
header connector expand the interface to four 50-pin ribbon cables, each of which has the pinout
of a PC-DIO-24. The pin assignments of the expansion cables are compatible with the standard
24-channel I/O module mounting racks (such as those manufactured by Opto 22 and Gordos).
The CB-100 cable termination accessory is available from National Instruments for use with the
PC -DIO-96 board. This kit includes two 50-conductor, flat-ribbon cables and a connector block.
Signal input and output wires can be attached to screw terminals on the connector block and are
therefore connected to the PC-DIO-96 I/O connector.