Measurement PCI-INT32 User Manual

PCI-DIO48H/CTR15

Digital I/O & Counters

User’s Manual

Revision 2

March, 2001

MEGA-FIFO, the CIO prefix to data acquisition board model numbers, the PCM prefix to data
acquisition board model numbers, PCM-DAS08, PCM-D24C3, PCM-DAC02, PCM-COM422,
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HM PCI-DIO48H-CTR15.lwp

Table of Contents

1 INTRODUCTION
2 INSTALLATION

3 I/O CONNECTIONS

4 SOFTWARE

5 I/O REGISTER MAPS

6 SPECIFICATIONS
7 ELECTRONICS AND INTERFACING

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1

12.1 SOFTWARE ..............................................

22.2 HARDWARE .............................................

3

33.1 CONNECTOR DIAGRAM ..................................

53.2 SIGNAL CONNECTIONS & CONDITIONING .................

7

74.1 UNIVERSAL LIBRARY ....................................

74.2 PACKAGED APPLICATION PROGRAMS ....................

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85.1 PCI-DIO48H/CTR15 REGISTER DESCRIPTION ...............

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19

197.1 PULL UP & PULL DOWN RESISTORS ......................

207.2 TTL TO SOLID STATE RELAYS ...........................

217.3 VOLTAGE DIVIDERS ....................................

This page is blank,

1 INTRODUCTION

The PCI-DIO48H/CTR15 is a multifunction, logic level, digital I/O board for
computers that implement the PCI bus. The board offers a powerful combination of
parallel digital I/O and multiple counter/timer functionality.

The board provides 48 bits of parallel digital I/O and fifteen 16-bit counter/timers.
The parallel digital I/O is provided in 24-bit groups based on an 8255, mode 0
emulation. Each group provides an 8-bit port A, an 8-bit port B, and an 8-bit port C
that can be split into two independent 4-bit ports. The 74S244 digital output drivers
have 64 mA sink and 15 mA source capabilities. The 74LS373 input buffers offer the
high standard input impedance of the 74LS series.

On power-up and reset, all I/O bits are set to input mode. Like all members of the
74LS series, unconnected inputs will typically float high. If you are using the board to
control items that must be OFF on reset, you must install pull-down resistors.
Provisions have been made on the board to allow users to easily install SIP resistor
packs in either a pull-up or pull-down configuration.

The board mounts five, 82C54 16-bit down-counter chips. Each 82C54 has three
counter/timers. The user has access to all gate, clock and output signals for all 15
counters in the five 82C54 counter chips. The board also has a 10 MHz
crystal-controlled oscillator that can be connected to one or more counter inputs.

The board is completely plug-and-play. There are no switches or jumpers to set. All
board addresses, interrupt levels, etc. are set by your computer’s plug-and-play
software.

2 INSTALLATION

The PCI-DIO48H/CTR15 boards are easy to install and use. T his procedure will help
you quickly and easily setup, install and test your board. We assume you already
know how to open the PC and install expansion boards. If you are unfamiliar or
uncomfortable with board installation, please refer to your computer’s documentation.

2.1 SOFTWARE

The board has no switches or jumpers to set. The simplest way to install your board
and test the installation is to use the InstaCal
floppy disk) supplied with your board.

TM

program provided on the CD (or

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InstaCal will show you any available options. It will create a configuration file that
your application software (and the Universal Library) will refer to so the software you
use will automatically have access to the exact configuration of the board.

Please refer to the Extended Software Installation Manual regarding the installation
and operation of InstaCal. The following hard copy information is provided as a
matter of completeness.

2.2 HARDWARE

The PCI-DIO48H/CTR15 board is completely plug and play. Simply follow the steps
shown below to install the board.

1. Turn your computer off, open it up and insert the board into any available
PCI slot.

2. Close your computer up and turn it on.

3. Windows will detect the board as it starts up. If the board’s configuration
file is already on the system, it will load without user interaction. If the
configuration file is not detected, you will be prompted to insert the disk
containing it. The required file is on the InstaCal disk or CD you received
with your board. The required file(s) will then be automatically loaded and
the PCI board will appear in the Device Manager under DAS components.

If you have installed ISA bus boards in the past you are familiar with the need to
select a base address and interrup t level. On PCI systems this is not of concern to
you. It is not up to you to select a base address and ensure that it does no t conflict
with an installed port. In PCI systems, the operating software and installation
software do the selection and checking for you.

InstaCal detects the I/O addresses set by the plug and play utility. The address and
other information is stored in the configuration file CB.CFG. This file is accessed by
the Universal Library for programmers. The Universal Library is the I/O board
interface for packaged applications such as HP-VEE, therefore the InstaCal settings
must be made in order for these and other applications to run.

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3 I/O CONNECTIONS

3.1 CONNECTOR DIAGRAM

The 100-pin, high-density connector is accessible through the computer’s expansion
bracket (Figure 3-1). The outputs signals from 8255 emulation registers are buffered
for higher current capacity. Three signals for each of the 15 82C54 counters, internal
PC +5V, and the 10 MHz oscillator output are also available.

Figure 3-1. 100-Pin Connector

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The I/O connections c an be brought o ut to easy-to-use screw terminals by purchasing
a CFF100-series cable and two CIO-MINI50 screw terminal boards. The 48 bits of
parallel digital I/O can be brought out to one of the CIO-MINI50s, and the
connections to the 15 counters would be brought out to the second.

As shown in Figure 3-2, the CFF100-xx cable has a 100-pin connector that fans out to
two, 50-pin cable legs.

3.2 SIGNAL CONNECTIONS & CONDITIONING

The 48 parallel digital I/O signals are buffered (high output drive) LSTTL. The
counter/timer signals are direct connections to the 82C54 chips and are CMOS TTL.
Refer to the Specification section for voltage and current ratings.

We offer a wide variety of digital signal conditioning products that provide an ideal
interface between high voltage or high current field signals and the
PCI-DIO48H/CTR15. If must control or monitor non-TTL level signals with your
board, please refer to our catalog or our web site for the following and other products.

CIO-ERB series, electromechanical relay output boards
CIO-SERB series, 10A electromechanical relay output boards
SSR-RACK series solid state I/O module racks
DR-Series, DIN rail mountable solid state I/O modules.

BOARD’S

100-PIN I/O
CONNECTOR

I/O PINS 1 TO 50

CONDITIONING or
50-PIN SCREW

TERMINAL BOARD.

C100FF-xx

CABLE

SIGNAL

I/O PINS 51 TO 100

SIGNAL CONDITIONING OR
50-PIN SCREW TERMINAL BOARD

Figure 3-2. C100FF-xx Cable Fan-out

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See Figure 3-3 for a translation diagram of the upper half (pins 51 to 100) of the
C100FF-xx cable to the second 50-pin connector.

Figure 3-3. C100FF-xx Pin-to-Pin Translation 51-100 to 1-50

IMPORTANT NOTE

This board emulates the 8255 chip. The 8255 emulation initializes all
ports as inputs on power-up and reset. These inputs typically w ill float
high and may have enough drive current to turn on any connected
devices.

If it is important that the outputs go to an OFF state (or an ON state) on a power-up or
reset, you must use pull-down resistors (or pull-up resistors for a mandatory ON

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