Measurement Computing CIO-DO48H - Manual (Page 5)

1 INTRODUCTION
The CIO-DO48H, 96H and 192H are designed to have the best quality and lowest
cost of any digital output board. Throughout this manual the notation CIO-DOxxH
is used when the information applies to the CIO-DO48H, CIO-DO96H and
CIO-DO192H inclusive. Exclusive information for a particular version will be
identified.
The ‘H’ designation indicates that these boards are capable of ‘High Drive’. High
Drive TTL is capable of higher currents than standard TTL. Rather than a few
milliamps or even microamps, High Drive outputs are capable of tens of milliamps.
See the electrical specification in this manual for details.
In addition to high drive the CIO-DOxxH boards have another advantage over
82C55 based boards in that there is no control register to set the port direction from
input to output. The CIO-DOxxH boards are output only. In applications where the
digital output is being used to control a relay that is switching an inductive load, the
82C55 is subject to resets and “glitching”, while the CIO-DOxxH is not.
The connector pin specification of all the CIO-DO and CIO-DI family of digital
boards may be used in place of one another without changing cabling or connectors.
All these products are supported by Universal Library programming library.
2 SOFTWARE INSTALLATION
In order to easily test your installation, it is recommended that you install InstaCal,
the installation, calibration and test utility that was supplied with your board. Refer
to the Software Installation Manual for information on the initial setup, loading, and
installation of InstaCal and optional Universal Library software.
InstaCal will guide you through hardware settings and allow you to easily test for
conflicts. If you decide not to use InstaCal to assist board configuration, details are
provided in the following section.
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