PCI-DIO24
24-bit, Logic-level Digital I/O

User's GuideJanuary 2019. Rev 4© Measurement Computing Corporation

Trademark and Copyright Information
Measurement Computing Corporation, InstaCal, Universal Library, and the Measurement Computing logo areeither trademarks or registered trademarks of Measurement Computing Corporation. Refer to the Copyrights &Trademarks section on mccdaq.com/legal for more information about Measurement Computing trademarks.
Other product and company names mentioned herein are trademarks or trade names of their respective
companies.
© 2019 Measurement Computing Corporation. All rights reserved. No part of this publication may be
reproduced, stored in a retrieval system, or transmitted, in any form by any means, electronic, mechanical, by
photocopying, recording, or otherwise without the prior written permission of Measurement Computing
Corporation.
NoticeMeasurement Computing Corporation does not authorize any Measurement Computing Corporation product for
use in life support systems and/or devices without prior written consent from Measurement Computing
Corporation. Life support devices/systems are devices or systems that, a) are intended for surgical implantation
into the body, or b) support or sustain life and whose failure to perform can be reasonably expected to result ininjury. Measurement Computing Corporation products are not designed with the components required, and are
not subject to the testing required to ensure a level of reliability suitable for the treatment and diagnosis ofpeople.

HM PCI-DIO24.docx

2

Table of Contents
Preface

About this User's Guide ....................................................................................................................... 4
What you will learn from this user's guide ......................................................................................................... 4
Conventions in this user's guide ......................................................................................................................... 4
Where to find more information ......................................................................................................................... 4
Register map ..................................................................................................................................................................... 4

Chapter 1

Introducing the PCI-DIO24 ................................................................................................................... 5
Functional block diagram ................................................................................................................................... 5
Chapter 2

Installing the PCI-DIO24 ....................................................................................................................... 6Unpacking........................................................................................................................................................... 6
Installing the software ........................................................................................................................................ 6
Installing the hardware ....................................................................................................................................... 6
Configuring the hardware ................................................................................................................................... 6
Signal connections .............................................................................................................................................. 7
Connector pinout............................................................................................................................................................... 7Cabling.............................................................................................................................................................................. 8
Field wiring and signal termination .................................................................................................................................. 8

Chapter 3

Functional Details ................................................................................................................................. 9
DIO signals ......................................................................................................................................................... 9Signal level control ............................................................................................................................................. 9
Chapter 4

Specifications ...................................................................................................................................... 11Power consumption .......................................................................................................................................... 11
Digital I/O ......................................................................................................................................................... 11
Environmental .................................................................................................................................................. 11
Signal connector ............................................................................................................................................... 12
EU Declaration of Conformity ............................................................................................................ 133

Preface

About this User's Guide
What you will learn from this user's guideThis user's guide describes the Measurement Computing PCI-DIO24 data acquisition device and lists device
specifications.

Conventions in this user's guide
For more information
Text presented in a box signifies additional information and helpful hints related to the subject matter you arereading.
Caution! Shaded caution statements present information to help you avoid injuring yourself and others,
damaging your hardware, or losing your data.
Bold text is used for the names of objects on a screen, such as buttons, text boxes, and checkboxes.

Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase.

Where to find more information
Additional information about the PCI-DIO24 is available on our website at www.mccdaq.com. You can also
contact Measurement Computing Corporation by phone, fax, or email with specific questions.


Knowledgebase: kb.mccdaq.com
Tech support form: www.mccdaq.com/support/support_form.aspx
Email: techsupport@mccdaq.com
Phone: 508-946-5100 and follow the instructions for reaching Tech Support

For international customers, contact your local distributor. Refer to the International Distributors section on ourwebsite at www.mccdaq.com/International.
For additional information relevant to the operation of your hardware, refer to the Documents subdirectory
where you installed the MCC DAQ software (C:\Program Files\Measurement Computing\DAQ by default), orsearch for your device on our website at www.mccdaq.com.

Register map
If you need to program at the register level in your application, refer to the Register Map for the PCI-DIO24,
PCI-DIO24H, PCI-DIO24/S, and PCI-DIO24/LP. This document is available on our website atwww.mccdaq.com/registermaps/RegMapPCI-DIO24X.pdf.

4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 programmableperipheral 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 inmodes 1 or 2, refer to the 82C55A CMOS Programmable Interface datasheet. This document is available on ourweb site at www.mccdaq.com/82C55.

Functional block diagram

PORT A (7:0)
PORT B (7:0)
PORT CH (3:0)
PORT CL (3:0)

Controller FPGA and logic

8255 DIOPORT A
PORT BPORT CHControl

37-Pin I/O Connector

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

ControlBus

ControlRegisters
IRQ INPUT

PORT CL

Decode/Status

Interrupt
Control+5VBus
Timing+12V-12V

Local Bus

Boot
EEPROM

PCI
Controller

BADR1
BADR2
Interrupt

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

Figure 1. Functional block diagram

5IRQ ENABLE

Chapter 2

Installing the PCI-DIO24
UnpackingAs with any electronic device, you should take care while handling to avoid damage from staticelectricity. Before removing the device from its packaging, ground yourself using a wrist strap or by simply
touching the computer chassis or other grounded object to eliminate any stored static charge.
Contact us immediately if any components are missing or damaged.

Installing the software
Refer to the MCC DAQ Quick Start and the PCI-DIO24 product page on our website for information about thesoftware that supports the device.
Install the software before you install your device
The driver needed to run the PCI-DIO24 is installed with the software. Therefore, you need to install thesoftware package you plan to use before you install the hardware.

Installing the hardware
The PCI-DIO24 board is completely plug-and-play, with no switches or jumpers to set. Configuration iscontrolled by your system's BIOS. Perform the following procedure to install your board.
Install the MCC DAQ software before you install your board
The driver needed to run your board is installed with the MCC DAQ software. Therefore, you need to install theMCC DAQ software before you install your board. Refer to the Quick Start Guide for instructions.
1.

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

2.

Close your computer and turn it on.
When connected for the first time, a Found New Hardware dialog opens when the operating system detects
the device. When the dialog closes, the installation is complete. If you have not installed the MCC DAQ
software, cancel the dialog and install it now.

3.

To test your installation and configure your board, run the InstaCal utility installed with MCC DAQ
software. Refer to the Quick Start Guide for information on how to initially set up and load InstaCal.

Configuring the hardware
All hardware configuration options on the PCI-DIO24 are software controlled.

6PCI-DIO24 User's Guide

Installing the PCI-DIO24

Signal connections
The table below lists board connectors, applicable cables, and accessory products for the PCI-DIO24.
Board connectors, cables, and accessory equipment
Connector typeCompatible cables
Compatible accessory products(with the C37FF-x or C37FFS-x cable)

37-pin D-type
C37FF-x unshielded ribbon cable. x = length in feet. (see Figure 3)
C37FFS-x cable shielded round cable. x = length in feet. (see Figure 4)
SCB-37
CIO-MINI37
CIO-MINI37-VERT
CIO-ERB08
CIO-SERB08
CIO-ERB24
CIO-SPADE50
SSR-RACK08
SSR-RACK24

Connector pinout
The I/O connector is a 37-pin, male D-type connector accessible from the rear of the computer through theexpansion backplate. The signals available are direct connections to the digital I/O chips as well as thecomputer's internal power supplies. The pinout is identical to the CIO-DIO24, except that –5 VDC is notbrought out. The PCI-DIO24 board's I/O connector is shown in Figure 2.

Figure 2. Connector pinout

Information on signal connections
General information regarding signal connection and configuration is available in the Guide to DAQ Signal
Connections on our website at www.mccdaq.com/support/DAQ-Signal-Connections.aspx.

7

PCI-DIO24 User's Guide

Installing the PCI-DIO24Cabling
The red stripe
identifies pin # 1

1120203737

1919

Figure 3. C37FF-x cable119120

37

1920

37

Figure 4. C37FFS-x cable

Field wiring and signal termination
You can connect the PCI-DIO24 to the following termination boards using the C37FF-x or C37FFS-x cable:

SCB-37 — 37-conductor, shielded signal connection/screw terminal box that provides two independent37-pin connections.
CIO-MINI37 — 4 x 4, 37-pin screw terminal board.
CIO-MINI37-VERT — 37-pin screw terminal accessory with vertical 37-pin male D connector.
CIO-SPADE50 — 16" X 4" termination panel which mates with both 37-pin and 50-pin connectors.

Details on these products are available on our website.
The following relay racks and accessory boards can be used with the PCI-DIO24:





SSR-RACK24 — 24-position solid state relay rack.
SSR-RACK08 — Eight-channel solid state relay rack.
CIO-ERB08 — Eight-channel electromechanical relay accessory for digital I/O boards.
CIO-SERB08 — Eight Form C and ten socketed relay accessory for digital I/O boards.
CIO-ERB24 — 24-channel electromechanical relay accessory for digital I/O boards.

Details on these products are available on our website.

8Chapter 3

Functional Details
DIO signals
All digital outputs and inputs on the PCI-DIO24 are CMOS TTL. Voltages and currents associated withexternal devices are usually far greater than can be supplied from a PCI-DIO24.
Caution! Direct connections to high-current/high voltage devices will damage the board.
The 82C55 digital I/O chip initializes all ports as inputs on power-up and reset. The state of the digital I/O lines
is not defined as either logic high or logic low when in input mode. Input devices connected to the PCI-DIO24
board may detect either a high or a low, and therefore may be turned off or on at power-up.

Signal level control
All I/O bits are set to a high impedance input mode on power up and reset. To prevent unwanted signal levels,and to drive all inputs on the device you are controlling to a known state after power up or reset, install pull-up
or pull-down resistors.
A pull-up resistor pulls all digital pins up to +5 V (high logic level). A pull-down resistor pulls all digital pins
down to 0 V (low logic level).
The PCI-DIO24 has open locations where you can install a 2.2 KΩ, eight-resistor single inline package (SIP)
resistor network for each port. The SIP is made up of eight 2.2 KΩ resistors. One side of each resistor isconnected to a single common point and brought out to a pin. The common line is marked with a dot or line atone end of the SIP. The remaining resistor ends are brought out to the other eight pins (see Figure 5).

2.2KOhm SIP
Dot(LO or HI)

I/O Lines

Figure 5. Eight-resistor SIP schematic

Install the SIP on the PCI-DIO24 board at the locations labeled PORT A, PORT B and PORT C (adjacent to the37-pin connector).

9PCI-DIO24 User's Guide

Functional Details

Figure 6 shows a schematic of an SIP installed in both the pull-up and pull-down positions.

HIHIn6n6n4n3n1User Connector
Digital I/O Linesn7n2n = A, B, or CCOMn7n5Digital
I/O Port+5 VDC

Dot indicates thecommon line

2.2 K SIP

2.2 K SIP

User Connector
Digital I/O Lines+5 VDCn5Digital
I/O Port

n4n3n2n = A, B, or C

n1n0n0LO
(GND)

LO
(GND)

COM

Dot indicates thecommon line

2.2 K SIP installed for pull-down

2.2 K SIP installed for pull-up

Figure 6. Pull-up and pull-down resistor SIP schematic

When installed, the SIP establishes either a high or low logic level at each of the eight I/O lines on the port. At
each board location, A, B, and C, there are 10 holes in a line. The hole on one end is marked "HI" and isconnected to +5V. The other end is marked "LO" and is connected to GND. The eight holes in the middle
connect to eight lines of the port, A, B or C.
To pull-up lines, orient the SIP with the common pin (dot) toward the HI end; to pull-down, install the resistor
with the common pin in the LO hole.
NoteWe recommend using 2.2 KΩ SIPs (MCC part number SP-K2.29C). Use a different value only if necessary.

10Chapter 4

SpecificationsAll specifications are subject to change without notice.
Typical for 25 °C unless otherwise specified.

Power consumption
Table 1. Power consumption specifications+5V operating

240 typical, 350 max

Digital I/O
Table 2. DIO specifications
Digital type
Configuration
Number of channels
Output highOutput low
Input highInput low
Power-up / reset state
Interrupts
Interrupt enable
Interrupt sources

82C55
Two banks of 8, two banks of 4, programmable by bank as input or output
24 I/O
3.7 volts min @ –2.5 mA
0.4 volts max @ 2.5 mA
2.2 volts min, 5.3 volts absolute max0.8 volts max, –0.3 volts absolute min
Input mode (high impedance)
INTA# - mapped to IRQn via PCI BIOS at boot-time
External (IR ENABLE, active low, disabled by default through internal resistor toTTL high) and programmable through PCI9052.
0 = disabled, 1 = enabled (default)
External source (IR INPUT), polarity programmable through PCI9052.
1 = active high, 0 = active low (default)

Environmental
Table 3. Environmental specifications
Operating temperature range
Storage temperature range
Humidity

0 °C to 50 °C–20 °C to 70 °C
0 to 90% non-condensing

11

PCI-DIO24 User's Guide

Specifications

Signal connector
Table 4. Signal connector specifications
Connector typeCompatible cables
Compatible accessory products with
the C37FF-x or C37FFS-x cable

37-pin D-type
C37FF-x unshielded ribbon cable. x = length in feet.
C37FFS-x cable shielded round cable. x = length in feet.
SCB-37
CIO-MINI37
CIO-MINI37-VERT
CIO-ERB08
CIO-SERB08
CIO-ERB24
CIO-SPADE50
SSR-RACK08
SSR-RACK24
Table 5. Connector pinout

Pin12345678910111213141516171819Signal NameIRQ INPUT
IRQ ENABLE
Port B7
Port B6
Port B5
Port B4
Port B3
Port B2
Port B1
Port B0
GNDOPEN
GND–12V
GND+12V
GND+5V
GNDPin202122232425262728293031323334353637Signal Name+5VGND
Port C7Port C6Port C5Port C4Port C3
Port C2Port C1
Port C0Port A7
Port A6
Port A5Port A4
Port A3
Port A2
Port A1
Port A012

EU Declaration of Conformity
According to ISO/IEC 17050-1:2010
Manufacturer:
Address:

Product Category:
Date and Place of Issue:
Test Report Number:Measurement Computing Corporation
10 Commerce Way
Norton, MA 02766
USAElectrical equipment for measurement, control and laboratory use.
December 4, 2017, Norton, Massachusetts USA
EMI5299.09

Measurement Computing Corporation declares under sole responsibility that the product

PCI-DIO24
is in conformity with the relevant Union Harmonization Legislation and complies with the essential
requirements of the following applicable European Directives:
Electromagnetic Compatibility (EMC) Directive 2014/30/EU
Low Voltage Directive 2014/35/EU
RoHS Directive 2011/65/EU
Conformity is assessed in accordance to the following standards:
EMC:
Emissions: EN 61326-1:2013 (IEC 61326-1:2012), Class A
 EN 55011: 2009 + A1:2010 (IEC CISPR 11:2009 + A1:2010), Group 1, Class A
Immunity: EN 61326-1:2013 (IEC 61326-1:2012), Controlled EM Environments EN 61000-4-2:2008 (IEC 61000-4-2:2008)
 EN 61000-4-3 :2010 (IEC61000-4-3:2010)
 EN 61000-4-4 :2012 (IEC61000-4-4:2012) EN 61000-4-5 :2014 (IEC61000-4-5:2014)
 EN 61000-4-6 :2013 (IEC61000-4-6:2013)
 EN 61000-4-11:2004 (IEC61000-4-11:2004)
Safety: EN 61010-1:2010 (IEC 61010-1:2010)
Environmental Affairs:
Articles manufactured on or after the Date of Issue of this Declaration of Conformity do not contain any of therestricted substances in concentrations/applications not permitted by the RoHS Directive.

Carl Haapaoja, Director of Quality Assurance

Measurement Computing Corporation
10 Commerce Way
Norton, Massachusetts 02766(508) 946-5100
Fax: (508) 946-9500
E-mail: info@mccdaq.com
www.mccdaq.com

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