Measurement-computing USB-DIO24/37 Instrukcja Użytkownika Pobierz pdf (Strona 6)

Chapter 1

Introducing the USB-DIO24/37

Overview: USB-DIO24/37 features

This manual explains how to install, configure and use the USB-DIO24/37 digital I/O board. You can use this

board in a variety of digital applications to control logic devices such as switches, gauges, relays, pumps, and

sensors.

The USB-DIO24/37 is a USB 2.0 low-speed device supported under popular Microsoft

Windows

operating

systems. It is designed for USB 1.1 ports, and is fully compatible with both USB 1.1 and USB 2.0 ports.

The USB-DIO24/37 features 24 bits of digital I/O and one 32-bit external event counter. The device is powered

by the +5 volt USB supply. No external power is required. All I/O connections are made to a 37-pin connector.

Digital channels are pulled up to +5V with 47 kΩ resistors.

An on-board industry standard 82C55 programmable peripheral interface chip provides the 24 discrete digital

I/O lines in four ports. You configure each digital port independently for either input or output.

The USB-DIO24/37 board is completely plug-and-play, with no jumpers or switches to set. All board addresses

are set by the system's plug-and-play software.

USB-DIO24/37 block diagram

USB-DIO24/37 functions are illustrated in the block diagram shown here.

Figure 1. USB-DIO24/37 functional block diagram

Software features

For information on the features of InstaCal and the other software included with your USB-DIO24/37, refer to

the Quick Start Guide that shipped with your device.

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Measurement-computing USB-DIO24/37 Instrukcja Użytkownika Strona 6