Measurement-computing CIO-DIO24 Manuel d'utilisateur télécharger pdf (Page 6)

Chapter 1

Introducing the CIO-DIO24

Overview: CIO-DIO24 features

The CIO-DIO24 has 24 digital I/O connections, and one 82C55 parallel-interface chip.

Each 82C55 chip controls 24 CMOS/TTL-compatible digital I/O pins. The 82C55 is configured as two 8-bit

ports and two 4-bit ports. Each port is programmable for input or output.

All I/O bits are set to input mode (high impedance) on power up and reset. If you are using the board to control

items that must be OFF on reset, install pull-down resistors. The board is equipped with open locations where

you can install SIP resistor networks for either pull-up or pull-down.

All signals pass through a 37-pin connector.

Software features

For information on the features of InstaCal and the other software included with your CIO-DIO24, refer to the

Quick Start Guide that shipped with your device. The Quick Start Guide is also available in PDF at

www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf

Check www.mccdaq.com/download.htm

for the latest software version.

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Measurement-computing CIO-DIO24 Manuel d'utilisateur Page 6