Access PCI-DIO-24D-H User Manual

10623 Roselle Street, San Diego, CA 92121 • [phone] • FAX [phone]

[e-mail] • www.accesio.com

MODEL PCI-DIO-24D(H)

USER MANUAL

FILE: MPCI-DIO-24DH.G1o

Notice

The information in this document is provided for reference only. ACCES does not assume any liability
arising out of the application or use of the information or products described herein. This document may
contain or reference information and products protected by copyrights or patents and does not convey
any license under the patent rights of ACCES, nor the rights of others.

IBM PC, PC/XT, and PC/AT are registered trademarks of the International Business Machines
Corporation.

Printed in USA. Copyright 2001, 2005 by ACCES I/O Products Inc, 10623 Roselle Street, San Diego, CA

92121. All rights reserved.

WARNING!!

ALWAYS CONNECT AND DISCONNECT YOUR FIELD CABLING WITH

THE COMPUTER POWER OFF. ALWAYS TURN COMPUTER POWER OFF

BEFORE INSTALLING A CARD. CONNECTING AND DISCONNECTING

CABLES, OR INSTALLING CARDS INTO A SYSTEM WITH THE

COMPUTER OR FIELD POWER ON MAY CAUSE DAMAGE TO THE I/O

CARD AND WILL VOID ALL WARRANTIES, IMPLIED OR EXPRESSED.

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Manual PCI-DIO-24DH

Warranty

Prior to shipment, ACCES equipment is thoroughly inspected and tested to applicable specifications.
However, should equipment failure occur, ACCES assures its customers that prompt service and support
will be available. All equipment originally manufactured by ACCES which is found to be defective will be
repaired or replaced subject to the following considerations.

Terms and Conditions

If a unit is suspected of failure, contact ACCES' Customer Service department. Be prepared to give the
unit model number, serial number, and a description of the failure symptom(s). We may suggest some
simple tests to confirm the failure. We will assign a Return Material Authorization (RMA) number which
must appear on the outer label of the return package. All units/components should be properly packed for
handling and returned with freight prepaid to the ACCES designated Service Center, and will be returned
to the customer's/user's site freight prepaid and invoiced.

Coverage

First Three Years: Returned unit/part will be repaired and/or replaced at ACCES option with no charge for
labor or parts not excluded by warranty. Warranty commences with equipment shipment.

Following Years: Throughout your equipment's lifetime, ACCES stands ready to provide on-site or in-plant
service at reasonable rates similar to those of other manufacturers in the industry.

Equipment Not Manufactured by ACCES

Equipment provided but not manufactured by ACCES is warranted and will be repaired according to the
terms and conditions of the respective equipment manufacturer's warranty.

General

Under this Warranty, liability of ACCES is limited to replacing, repairing or issuing credit (at ACCES
discretion) for any products which are proved to be defective during the warranty period. In no case is
ACCES liable for consequential or special damage arriving from use or misuse of our product. The
customer is responsible for all charges caused by modifications or additions to ACCES equipment not
approved in writing by ACCES or, if in ACCES opinion the equipment has been subjected to abnormal
use. "Abnormal use" for purposes of this warranty is defined as any use to which the equipment is
exposed other than that use specified or intended as evidenced by purchase or sales representation.
Other than the above, no other warranty, expressed or implied, shall apply to any and all such equipment
furnished or sold by ACCES.

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Table of Contents

Chapter 1: Introduction................................................................................................. 5

Specifications ............................................................................................................ 7

Figure 1-1: Card D or H Block Diagram .................................................................. 8

Chapter 2: Installation................................................................................................. 10

Chapter 3: Option Selection....................................................................................... 12

Figure 3-1: Option Selection Map version D.......................................................... 13

Figure 3-2: Option Selection Map version H ......................................................... 13

Chapter 4: Address Selection .................................................................................... 14

Chapter 5: Software .................................................................................................... 15

Chapter 6: Programming............................................................................................ 16

Table 6-1: Address Assignment Table................................................................... 16

Table 6-2: Control Register Bit Assignment........................................................... 17

Chapter 7: 8254 Counter/Timer.................................................................................. 21

Chapter 8: Connector Pin Assignments.................................................................... 27

Table 8-1: 50-Pin Connector Pin Assignments...................................................... 27

Table 8-2: 37-Pin D-Sub Connector Pin Assignments........................................... 28

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Chapter 1: Introduction

Features

• 24 Bits of Digital Input/Output.

• All 24 I/O Lines Buffered on the Card.

• I/O Buffers Can Be Tri-stated under Program Control.

• Four and Eight Bit Ports Independently Selectable for I/O.

• Pull-Ups on I/O Lines. Pull Down resistors may be installed at the factory (**per port 8 bit**)

• Resettable fused +5V Supply Available to the User.

• "H" version compatible with Industry Standard I/O Racks.

• Three optional i8254 type (**9 16-bit converters**) counters.

Applications

• Automatic Test Systems.

• Laboratory Automation.

• Robotics.

• Machine Control.

• Security Systems, Energy Management.

• Relay Monitoring and Control.

• Parallel Data Transfer to PC.

• Sensing Switch Closures or TTL, DTL, CMOS Logic.

• Driving Indicator Lights or Recorders.

Description

The card comes in two basic models. The difference between the two models is that I/O connections to
the D are via a standard 37-pin D-sub connector while I/O connections to the H are via a 50-pin
connector. The cards are 4.8 inches long and may be installed in any 5V PCI-bus slot in IBM and
compatible personal computers.

These cards provide 24 bits of parallel digital input/output on the PCI bus. These cards contain a type
8255-5 Programmable Peripheral Interface (PPI) chip. They can be programmed to accept inputs or to
provide outputs on three 8-bit ports designated Ports A, B, and C. Port C can be further divided into two
4-bit nibbles. The direction of each port is independent of other ports.

Also, bit 3 of Port C can be used as an internal interrupt to the computer if the Interrupt Select 0 jumper is
installed in the INT position. On the card, the EXT interrupt position is for factory testing. When bit C3
goes low (edge triggering) an interrupt is requested.

Each I/O line is buffered by a type 74ABT245B tristate buffer transceiver capable of sourcing 32 mA or
sinking 64mA. Pull-ups on the card assure that there are no erroneous outputs at power up until the card
is initialized by system software. The buffers are configured automatically by hardware logic for input or

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Manual PCI-DIO-24DH

output use according to direction assignment from a control register in the PPI. Further, if a jumper is
properly placed on the card, the tristate buffers may be enabled/disabled under program control. (See the
Option Selection section to follow.)

I/O wiring connections for the H card are via a 50-pin connector on the back plate of the card. Flat
insulation-displacement ribbon cables can be used to connect these cards to termination panels and relay
output cards. Also, the 50-pin connection provides compatibility with OPTO-22, Gordos, Potter &
Brumfield and Western Reserve Controls module mounting racks. Fused +5 VDC power is available on
the I/O connector at pin 49. The on-board fuse is rated at 0.5A at room temperature, and can be reset by
cycling computer power, or by removing the load.

I/O wiring connections for the D card are via a 37-pin D-sub connector on the back plate of the card. A
37-pin D-sub solder cup mating connector, or flat insulation-displacement ribbon cable can be used to
connect these cards to termination panels. The "D" version has a fused 5 volts available at connector pin

20. The on-board fuse is rated at 0.5A, and can be reset the same as the H version.

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Specifications

Digital Inputs (TTL Compatible)

• Logic High: 2.0 to 5.0 VDC

• Logic Low: -0.5 to +0.8 VDC

• Load: ±20 μA

Digital Outputs

• Logic High: 2.0 VDC min., source 32 ma

• Logic Low: 0.55 VDC max., sink 64 ma

Optional Counter/Timers

• Type: 82C54 programmable interval counters (up to three)

• Output drive: Source 2.5 mA, sink 24 mA

• Input Gate: TTL/CMOS compatible

• Clock: On-board, 1 MHz crystal-controlled oscillator

• Active Count Edge: Negative edge (falling edge)

• Minimum Clock Pulse Width: 30 ns high, 40 ns low

• Timer Range: 16 bits (x3 per i8254)

• Power Output: Resettable 0.5A fused +5 VDC from computer bus

Power Required

• Basic Unit: +5 VDC at 170 mA typical if no current is drawn from

the auxiliary fused +5 VDC output

• With One Counter: +5 VDC at 190 ma

• With Two Counters: +5 VDC at 210 ma

• With Three Counters: +5 VDC at 230 ma

Environmental

• Operating Temperature Range: 0 °C. to 60 °C

• Storage Temperature Range: -50 °C. to +120 °C

• Humidity: 0 to 90% RH, non-condensing

• Size: 4.8" Long (122 mm)

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Manual PCI-DIO-24DH

Figure 1-1: Card D or H Block Diagram

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Manual PCI-DIO-24DH

Optional Counter/Timers

These cards have options to include one, two, or three 82C54 counter(s) that each include three 16-bit
counter/timers factory configured in an optimal module for use as event counters, frequency output, pulse
width, and frequency measurement. See the Block Diagram which shows one 82C54 counter. If your card
has one or more of these optional counters, an -S01, -S02, or -S03 is appended to the model number for
one, two, or three counters respectively. For example, a 24-bit digital input/output card with a 50-pin
connector and two 82C54 counters is model H-S02.

Note

If you have a model D-S03, then the fused +5V power output is not available.

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Manual PCI-DIO-24DH