Measurement Specialties manual Introducing the PCI-DIO24, PCI-DIO24 block diagram, Chapter

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Chapter 1

Introducing the PCI-DIO24

This manual explains how to install, configure and use the PCI-DIO24 digital I/O board.

The PCI-DIO24 provides 24 lines of digital I/O. An on-board, industry standard 82C55 programmable peripheral interface chip provides the 24 digital I/O lines in three eight-bit ports (Port A, Port B, and Port C). Port C can be further divided into two four-bit ports (Port C-HI and Port C-LO). You can configure each port independently for either input or output. All 24 I/O lines are accessible through the board's 37-pin connector. The I/O pins of an 82C55 are bi-directional CMOS TTL level.

82C55 mode 1 or mode 2 operation

This user's guide provides information on I/O configuration of the 82C55 in mode 0. To use the 82C55 in modes 1 or 2, refer to the 82C55A CMOS Programmable Interface datasheet. This document is available on our web site at www.mccdaq.com/82C55.

PCI-DIO24 block diagram

PCI-DIO24 functions are illustrated in the block diagram shown here.

37-Pin I/O Connector

PORT A (7:0)

PORT B (7:0)

PORT CH (3:0)

PORT CL (3:0)

+5V

+12V

-12V

8255 DIO

PORT A

PORT B

PORT CH PORT CL

Control

 

 

 

 

 

 

 

 

 

Controller FPGA and logic

 

 

 

 

 

 

Control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Control

 

 

 

 

 

 

 

Bus

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Registers

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IRQ INPUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Decode/Status

 

Interrupt

 

 

IRQ ENABLE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bus

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Timing

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Local Bus

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Boot

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BADR1

 

 

 

 

 

 

 

EEPROM

 

 

 

 

 

 

PCI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BADR2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Controller

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Interrupt

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PCI BUS (5V, 32-bit, 33 MHZ)

1-1

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Contents Page PCI-DIO24 Management committed to your satisfaction Trademark and Copyright Information Table of Contents Preface Where to find more informationAbout this Users Guide What you will learn from this users guideIntroducing the PCI-DIO24 PCI-DIO24 block diagramChapter Software features Additional documentation Optional components Installing the PCI-DIO24What comes with your PCI-DIO24 shipment? HardwareConfiguring the hardware Installing the software Installing the hardwareUnpacking the PCI-DIO24 Connectors, cables main I/O connector Connecting the board for I/O operationsPin out main I/O connector Cabling Field wiring and signal terminationPCI-DIO24 Users Guide Installing the PCI-DIO24 Programming languages Packaged applications programs Programming and Developing ApplicationsRegister-level programming Signal level control DIO signalsFunctional Details User Connector Digital I/O Lines Environmental SpecificationsPower consumption Digital input / outputBoard connector, cables, and accessory equipment Main connector and pin outUSA Declaration of ConformityMailinfo@mccdaq.com

PCI-DIO24 specifications

The Measurement Specialties PCI-DIO24 is a powerful digital input/output card designed to meet the demands of industrial automation and control applications. It provides a cost-effective and versatile solution for acquiring and managing digital signals in a variety of environments. With its robust design and advanced features, the PCI-DIO24 stands out as an essential tool for engineers and technicians working with data acquisition systems.

One of the key features of the PCI-DIO24 is its ability to support a total of 24 digital I/O channels. These channels are configurable, meaning they can be set up as either input or output, providing flexibility in applications where both types of signals need to be managed. The card operates on a standard PCI bus, ensuring compatibility with a wide range of computer systems.

The PCI-DIO24 is equipped with opto-isolated inputs, which are crucial for protecting the computer and the card from voltage spikes and noise that can occur in industrial environments. This isolation enhances the reliability of the system, allowing it to function smoothly even in harsh conditions. The card also features a 24-bit resolution for digital input signals, ensuring high precision in data collection.

In addition to its input/output capabilities, the PCI-DIO24 offers interrupt-driven data acquisition, which ensures efficient processing of incoming signals. This feature is especially beneficial in applications that require real-time response to digital events, such as monitoring sensor outputs or controlling actuators.

Another noteworthy technology integrated into the PCI-DIO24 is the ability to interface with external devices easily. The card supports standard TTL and CMOS logic levels, making it compatible with a vast array of sensors and control devices. This wide compatibility allows for easy integration into existing systems and enhances the versatility of the card.

The PCI-DIO24 is also designed with durability in mind. Its industrial-grade components ensure long-lasting performance, while the compact form factor allows for easy installation in confined spaces. The card is accompanied by comprehensive software support that facilitates smooth setup and configuration, enabling users to maximize the performance of their digital I/O tasks.

In summary, Measurement Specialties’ PCI-DIO24 is a robust digital I/O card that offers a rich set of features and technologies suitable for a broad range of applications. Its flexible configuration, opto-isolated inputs, interrupt-driven data acquisition, and compatibility with various external devices make it a reliable choice for those seeking a high-performance solution for digital signal management in industrial and automation environments.