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© National Instruments Corporation
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PC-DIO-24 User Manual
Chapter 1
Introduction
This chapter describes the PC-DIO-24, lists what you need to get started, describes software
programming choices, optional equipment, and custom cables, and explains how to unpack the
PC-DIO-24.
About the PC-DIO-24
Thank you for purchasing the National Instruments PC-DIO-24. The PC-DIO-24 is a low cost,
24-bit parallel, digital I/O interface for the PC. An OKI 82C55A PPI controls the 24 bits of
digital I/O. The 82C55A is very flexible and powerful when interfacing with peripheral
equipment, can operate in either a unidirectional or bidirectional bus mode, and can generate
interrupt request outputs. The 82C55A can be programmed for almost any 8-bit or 16-bit digital
I/O application. All digital I/O is through a standard 50-pin male connector. The pin
assignments for this connector are compatible with standard 24-channel digital I/O applications.
The PC-DIO-24 can be used in a wide range of digital I/O applications. With the PC-DIO-24, a
PC can be interfaced to any of the following.
•
Other computers
-
Another PC with a National Instruments PC-DIO-24 or AT-DIO-32F
-
IBM Personal System/2 with a National Instruments MC-DIO-24 or MC-DIO-32F
-
Apple Macintosh II with a National Instruments NB-DIO-24 or NB-DIO-32F
-
Any other computer with an 8-bit or 16-bit parallel interface
•
Centronics-compatible printers and plotters
•
Panel meters
•
Instruments and test equipment with BCD readouts and/or controls
•
Opto-isolated solid-state relays (SSRs) and I/O module mounting racks
Note: The PC-DIO-24 cannot sink sufficient current to drive the SSR-OAC-5 and
SSR-OAC-5A output modules. However, it can drive the SSR-ODC-5 output module
and all SSR input modules available from National Instruments.
If you need to drive a SSR-OAC-5 or SSR-OAC-5A, you can either use a non-inverting
digital buffer chip between the PC-DIO-24 and the SSR backplane, or you can use a
DIO-23F or MIO Series board with appropriate connections (e.g., SC-205X and
cables).
Summary of Contents for PC-DIO-24
Page 51: ...Appendix C OKI 82C55A Data Sheet PC DIO 24 User Manual C 2 National Instruments Corporation...
Page 52: ...Appendix C OKI 82C55A Data Sheet National Instruments Corporation C 3 PC DIO 24 User Manual...
Page 53: ...Appendix C OKI 82C55A Data Sheet PC DIO 24 User Manual C 4 National Instruments Corporation...
Page 54: ...Appendix C OKI 82C55A Data Sheet National Instruments Corporation C 5 PC DIO 24 User Manual...
Page 55: ...Appendix C OKI 82C55A Data Sheet PC DIO 24 User Manual C 6 National Instruments Corporation...
Page 56: ...Appendix C OKI 82C55A Data Sheet National Instruments Corporation C 7 PC DIO 24 User Manual...
Page 57: ...Appendix C OKI 82C55A Data Sheet PC DIO 24 User Manual C 8 National Instruments Corporation...
Page 58: ...Appendix C OKI 82C55A Data Sheet National Instruments Corporation C 9 PC DIO 24 User Manual...
Page 59: ...Appendix C OKI 82C55A Data Sheet PC DIO 24 User Manual C 10 National Instruments Corporation...
Page 60: ...Appendix C OKI 82C55A Data Sheet National Instruments Corporation C 11 PC DIO 24 User Manual...
Page 61: ...Appendix C OKI 82C55A Data Sheet PC DIO 24 User Manual C 12 National Instruments Corporation...
Page 62: ...Appendix C OKI 82C55A Data Sheet National Instruments Corporation C 13 PC DIO 24 User Manual...
Page 63: ...Appendix C OKI 82C55A Data Sheet PC DIO 24 User Manual C 14 National Instruments Corporation...
Page 64: ...Appendix C OKI 82C55A Data Sheet National Instruments Corporation C 15 PC DIO 24 User Manual...
Page 65: ...Appendix C OKI 82C55A Data Sheet PC DIO 24 User Manual C 16 National Instruments Corporation...
Page 66: ...Appendix C OKI 82C55A Data Sheet National Instruments Corporation C 17 PC DIO 24 User Manual...