Measurement Computing CIO-DIO24H User Manual

CIO-DIO24H

Digital Input/Output Board

User’s Guide

© Copyright 2007, Measurement Computing Corporation

Document Revision 1, January, 2007

Your new Measurement Computing product comes with a fantastic extra —

Management committed to your satisfaction!

Refer to www.mccdaq.com/execteam.html for the names, titles, and contact information of each key executive at Measurement
Computing.

Thank you for choosing a Measurement Computing product—and congratulations! You own the finest, and you can now enjoy
the protection of the most comprehensive warranties and unmatched phone tech support. It’s the embodiment of our mission:

 To provide PC-based data acquisition hardware and software that will save time and save money.

Simple installations minimize the time between setting up your system and actually making measurements. We offer quick and
simple access to outstanding live FREE technical support to help integrate MCC products into a DAQ system.

Lifetime warranty: Every hardware product manufactured by Measurement Computing Corporation is warranted against
defects in materials or workmanship for the life of the product. Products found defective are repaired or replaced promptly.

Lifetime Harsh Environment Warranty®: We will replace any product manufactured by Measurement Computing
Corporation that is damaged (even due to misuse) for only 50% of the current list price. I/O boards face some tough operating
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HM CIO-DIO24H.doc

3

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TracerDAQ, Universal Library, Harsh Environment Warranty, Measurement Computing Corporation, and the Measurement
Computing logo are either trademarks or registered trademarks of Measurement Computing Corporation.

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Notice

Measurement Computing Corporation does not authorize any Measurement Computing Corporation product for use
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or b) support or sustain life and whose failure to perform can be reasonably expected to result in injury.
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 of people.

4

Table of Contents

Preface

About this User's Guide .......................................................................................................................6

What you will learn from this user's guide.........................................................................................................6

Conventions in this user's guide .........................................................................................................................6

Where to find more information.........................................................................................................................6

Chapter 1

Introducing the CIO-DIO24H ................................................................................................................7

Overview: CIO-DIO24H features ......................................................................................................................7

Software features................................................................................................................................................7

Chapter 2

Installing the CIO-DIO24H ....................................................................................................................8

What comes with your CIO-DIO24H shipment? ...............................................................................................8

Hardware .......................................................................................................................................................................... 8

Additional documentation................................................................................................................................................. 8

Optional components..........................................................................................................................................8

Unpacking the CIO-DIO24H .............................................................................................................................9

Installing the software ........................................................................................................................................9

Configuring the CIO-DIO24H ...........................................................................................................................9

Base address.....................................................................................................................................................................10

Interrupt level ..................................................................................................................................................................11

Wait state .........................................................................................................................................................................12

Installing the CIO-DIO24H..............................................................................................................................12

Connecting the board for I/O operations ..........................................................................................................13

Connectors, cables – main I/O connector ........................................................................................................................13

Cabling.............................................................................................................................................................................14

Field wiring, signal termination, and conditioning ..........................................................................................................14

Chapter 3

Functional Details ...............................................................................................................................15

82C55 emulation ..............................................................................................................................................15

Signal level control...........................................................................................................................................15

Digital I/O Isolation..........................................................................................................................................16

Chapter 4

Programming and Developing Applications ....................................................................................17

Programming languages ...................................................................................................................................17

Packaged applications programs ......................................................................................................................17

Register-level programming.............................................................................................................................17

Chapter 5

Specifications......................................................................................................................................18

Digital Input / Output .......................................................................................................................................18

Power consumption ..........................................................................................................................................18

Environmental ..................................................................................................................................................18

Main connector and pin out..............................................................................................................................19

5

Preface

About this User's Guide

What you will learn from this user's guide

This user's guide explains how to install, configure, and use the CIO-DIO24H so that you get the most out of its
analog output features. This user's guide also refers you to related documents available on our web site, and to
technical support resources.

Conventions in this user's guide

The following conventions are used in this manual to convey special information:

For more information on …

Text presented in a box signifies additional information and helpful hints related to the subject matter you are
reading.

Caution! Shaded caution statements present information to help you avoid injuring yourself and others,

damaging your hardware, or losing your data.

<#:#> Angle brackets that enclose numbers separated by a colon signify a range of numbers, such as those assigned

to registers, bit settings, etc.

bold text Bold text is used for the names of objects on the screen, such as buttons, text boxes, and check boxes. For

example:

1. Insert the disk or CD and click the OK button.

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

example:
The InstaCal installation procedure is explained in the Quick Start Guide.
Never touch the exposed pins or circuit connections on the board.

Where to find more information

The following electronic documents provide information relevant to the operation of the CIO-DIO24H.

 MCC's Specifications: CIO-DIO24H (the PDF version of the Specifications chapter in this guide) is

available on our web site at www.mccdaq.com/pdfs/CIO-DIO24H.pdf

 MCC's Quick Start Guide is available on our web site at

 MCC's Guide to Signal Connections is available on our web site at

www.mccdaq.com/signals/signals.pdf

 MCC's Universal Library User's Guide is available on our web site at

 MCC's Universal Library Function Reference is available on our web site at

 MCC's Universal Library for LabVIEW

.

.

™

User’s Guide is available on our web site at

.

.

.

.

CIO-DIO24H User's Guide (this document) is also available on our web site at

.

6

Chapter 1

Introducing the CIO-DIO24H

Overview: CIO-DIO24H features

The CIO-DIO24H is a high-drive TTL board with 24 digital I/O connections, and one 82C55 parallel-interface
chip. The I/O is configured as two 8-bit ports and two 4-bit ports based on an 82C55 mode 0 emulation. Each
port may be individually programmed as input or output.

All digital inputs are LSTTL. The output signals are buffered, high-output drive TTL. The digital output drivers
are 74S244 chips that can sink 64 mA and source 15 mA. The input buffers are 74LS373 chips and have
standard high input impedance of the 74LS series devices.

All I/O bits are set to input mode (high impedance) on power up and reset. If you are using the board to control
items that must be OFF on reset, install pull-down resistors. The board is equipped with open locations where
you can install SIP resistor networks for either pull-up or pull-down.

All signals pass through a 37-pin connector.

Software features

For information on the features of InstaCal and the other software included with your CIO-DIO24H, refer to
the Quick Start Guide that shipped with your device. The Quick Start Guide is also available in PDF at

Check www.mccdaq.com/download.htm

for the latest software version.

.

7

Installing the CIO-DIO24H

What comes with your CIO-DIO24H shipment?

The following items are shipped with the CIO-DIO24H.

Hardware

 CIO-DIO24H

Chapter 2

Additional documentation

In addition to this hardware user's guide, you should also receive the Quick Start Guide (available in PDF at

the software you received with your CIO-DIO24H and information regarding installation of that software.
Please read this booklet completely before installing any software or hardware.

). This booklet supplies a brief description of

Optional components

 Cables

C37FF-x

 Signal termination and conditioning accessories

MCC provides signal conditioning and termination products for use with the CIO-DIO24. Refer to Field

wiring, signal termination, and conditioning on page 14 for a complete list of compatible accessory

products.

C37FFS-x

8

CIO-DIO24H User's Guide Installing the CIO-DIO24H

Unpacking the CIO-DIO24H

As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the CIO-DIO24H 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.

If any components are missing or damaged, notify Measurement Computing Corporation immediately by
phone, fax, or e-mail:

Phone: [phone] and follow the instructions for reaching Tech Support. 



Fax: [phone] to the attention of Tech Support



Email: [e-mail]

Installing the software

Quick-Start.pdf.

Configuring the CIO-DIO24H

The CIO-DIO24H has a bank of base address-select switches, an interrupt level select jumper, and a wait-state
jumper. The InstaCal calibration and test program included with the CIO-DIO24H will show you how to
configure the board. Run InstaCal to verify or change their settings before installing the board in your
computer.

The location of each switch and jumper on the CIO-DIO24H is shown in Figure 1.

Base

Address

switches

The CIO-DIO24H is shipped with the factory-default settings listed in the table below.

Interrupt

Level

jumper

Figure 1. Switch and jumper locations

Wait

Stat e

jumper

9

CIO-DIO24H User's Guide Installing the CIO-DIO24H

Factory-configured default settings

Switch/jumper Description Default setting

Base address DIP switches Sets the base address 300h (768 decimal)

Interrupt level jumper Sets the interrupt level "X" position (no interrupt level set)

Wait State jumper Enables/disables the on-board wait-state

generator.

Off (disabled)

Review the following information to change the default configuration of a switch or jumper.

Base address

The easiest way to set the base address is to let InstaCal show you the correct settings. However, if you are
already familiar with setting ISA base addresses, you may use the base address switch description below to
guide your base address selection.

Each I/O board uses one or more I/O address locations within your computer’s I/O address space. To avoid
interference with other installed boards, each board must use unique addresses. The base address is the board’s
starting location that software writes to when communicating with the CIO-DIO24H. A set of DIP switches is
used to set the base address. By placing the switch down, the CIO-DIO24H address decode logic is instructed
to respond to that address bit. A complete address is constructed by calculating the HEX or decimal number
which corresponds to all the address bits the board has been instructed to respond to.

The board is shipped with the base address set to 300 hex (see

Figure 2

). Unless there is already a board in your

system that uses address 300 hex (768 decimal), leave the switches as they were set at the factory.

HEX

SW

200

A9

9

7

8

Figure 2. Base address switch

543

6

2

A8
A7
A6
A5
A4
A3
A2

100
80
40
20
10
08
04

In the default configuration, addresses 9 and 8 are down, and all others are up. Address 9 = 200 hex
(512 decimal), and address 8 = 100 hex (256 decimal). When added together they equal 300 hex (768 decimal).

Disregard the numbers printed on the switch

When setting the base address, refer to the numbers printed in white on the printed circuit board.

Certain addresses are used by the computer. Other addresses are free, and may be used by the CIO-DIO24H.
Refer to the following table for a list of I/O addresses.

PC I/O Address Summary

Hex Range Function Hex Range Function

000-00F 8237 DMA #1 2C0-2CF EGA

020-021 8259 PIC #1 2D0-2DF EGA

040-043 8253 TIMER 2E0-2E7 GPIB (AT)

060-063 8255 PPI (XT) 2E8-2EF SERIAL PORT

060-064 8742 CONTROLLER (AT) 2F8-2FF SERIAL PORT

070-071 CMOS RAM & NMI MASK (AT) 300-30F PROTOTYPE CARD

080-08F DMA PAGE REGISTERS 310-31F PROTOTYPE CARD

10

CIO-DIO24H User's Guide Installing the CIO-DIO24H

2

7

X

Hex Range Function Hex Range Function

0A0-0A1 8259 PIC #2 (AT) 320-32F HARD DISK (XT)

0A0-0AF NMI MASK (XT) 378-37F PARALLEL PRINTER

0C0-0DF 8237 #2 (AT) 380-38F SDLC

0F0-0FF 80287 NUMERIC CO-P (AT) 3A0-3AF SDLC

1F0-1FF HARD DISK (AT) 3B0-3BB MDA

200-20F GAME CONTROL 3BC-3BF PARALLEL PRINTER

210-21F EXPANSION UNIT (XT) 3C0-3CF EGA

238-23B BUS MOUSE 3D0-3DF CGA

23C-23F ALT BUS MOUSE 3E8-3EF SERIAL PORT

270-27F PARALLEL PRINTER 3F0-3F7 FLOPPY DISK

2B0-2BF EGA 3F8-3FF SERIAL PORT

You can set the base address switch to any address in the range of 000-3FC. If you are not using IBM
prototyping cards or another board which occupies these addresses, the CIO-DIO24H board's default address of
300h is free to use.

Addresses not specifically listed, such as 390-39Fh, are not reserved and may be available. Check your
computer for other boards which may use I/O addresses.

Interrupt level

The trigger logic on the CIO-DIO24H is quite simple. Pin 1 (IR Input) of the board's 37-pin connector is an
input jumper which maps the interrupt directly onto the PC bus. The signal to the bus is buffered. The buffer is
enabled by a LOW level on Pin 2,

IR Enable.

Interrupts are hardware-initiated software routines. Most hardware interrupts are assigned by the computer and
are reserved for internal system use. Refer to the following table for some typical interrupt assignments on a
computer.

The CIO-DIO24H is shipped with the jumper in the "
( ). Leave the jumper in the default "X" position for now. If your software employs interrupt service

Figure 3

routines, it will direct you to select an IRQ level. Use the jumper block labeled

X" position, which means that no interrupt level is set

IR1 above the PC bus interface

(gold pins) if you want to set the interrupt.

IR1

3456

Figure 3. Interrupt level select jumper (no interrupt level set)

11

CIO-DIO24H User's Guide Installing the CIO-DIO24H

Hardware interrupt assignments

Name Description Name Description

NMI Parity IRQ8 Real Time Clock (AT)

IRQ0 Timer IRQ9 Re-directed to IRQ2

(AT)

IRQ1 Keyboard IRQ10 Unassigned

IRQ2 Reserved (XT) IRQ11 Unassigned

INT 8-15 (AT)

IRQ3 COM OR SDLC IRQ12 Unassigned

IRQ4 COM OR SDLC IRQ13 80287 MUNERIC CO-P

IRQ5 Hard Disk (XT) IRQ14 Hard Disk

LPT (AT)

IRQ6 Floppy Disk IRQ15 Not assigned

IRQ7 LPT

Wait state

The CIO-DIO24H board has a wait state jumper which you can set to enable an on-board wait state generator
(see Figure 4). A wait state is an extra delay injected into the processor's clock via the bus. This delay slows
down the processor when the processor addresses the CIO-DIO24H board, so that signals from slow devices
(chips) will be accepted. The wait state generator is only active when the CIO-DIO24H is being accessed. Your
PC will not be slowed down in general by using the wait state.

O
F

O

F

N

WAIT

STATE

Figure 4. Wait state jumper

Figure 4The jumper is shown in is configured for OFF (wait state is disabled).

Because all PC expansion board busses are slowed to either 8 MHz or 10 MHz, the wait state will generally not
be required. If you experience sporadic errors from the 82C55 digital I/O chip (reset, port direction swaps), try
enabling the wait state generator.

Installing the CIO-DIO24H

After you configure the base address, you can install the CIO-DIO24H into your computer. Follow the steps
below.

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
the MCC DAQ software before you install your board. Refer to the Quick Start Guide for instructions on
installing the software.

12

CIO-DIO24H User's Guide Installing the CIO-DIO24H

1.

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

2.

Close your computer and turn it on.

3.

Software-Quick-Start.pdf for information on how to initially set up and load InstaCal.

Connecting the board for I/O operations

Connectors, cables – main I/O connector

The table below lists the board connector, applicable cables, and compatible accessory products.

Board connector, cables, and accessory equipment

Connector type 37-pin male "D" connector

Compatible cables C37FF-x

C37-FFS-x

DFCON-37 (D-connector, D-shell, and termination pins to construct your own cable)

Compatible accessory products
with the C37FF-x cable and
C37FFS-x cable

CIO-MINI37

CIO-SPADE50

SSR-RACK08

SSR-RACK24

CIO-ERB08

CIO-ERB24

The CIO-DIO24H connector is a 37-pin D-type male connector that is accessible through the computer's
expansion bracket (see ). The signals available are direct connections to the 82C55 digital I/O chip as

Figure 5

well as the PC’s internal power supplies.

GND 19

+5V 18

GND 17

+12V 16

GND 15

-12V 14

GND 13

-5V 12

GND 11
FIRSTPORTB Bit 0 10
FIRSTPORTB Bit 1 9
FIRSTPORTB Bit 2 8
FIRSTPORTB Bit 3 7
FIRSTPORTB Bit 4 6
FIRSTPORTB Bit 5 5
FIRSTPORTB Bit 6 4
FIRSTPORTB Bit 7 3

IR Enable 2

IR Input 1

37 FIRSTPORTA Bit 0
36 FIRSTPORTA Bit 1
35 FIRSTPORTA Bit 2
34 FIRSTPORTA Bit 3
33 FIRSTPORTA Bit 4
32 FIRSTPORTA Bit 5
31 FIRSTPORTA Bit 6
30 FIRSTPORTA Bit 7
29 FIRSTPORTC Bit 0
28 FIRSTPORTC Bit 1
27 FIRSTPORTC Bit 2
26 FIRSTPORTC Bit 3
25 FIRSTPORTC Bit 4
24 FIRSTPORTC Bit 5
23 FIRSTPORTC Bit 6
22 FIRSTPORTC Bit 7
21 GND
20 +5V

Figure 5. I/O connector pin-out

13

CIO-DIO24H User's Guide Installing the CIO-DIO24H

Cabling

37

19

The red stripe

20

1

identifies pin # 1

Figure 6. C37FF-x cable

37

20

19

1

Figure 7. C37FFS-x cable

Field wiring, signal termination, and conditioning

37

20

19

1

37

20

19

1

You can use the following cabling, screw termination, and signal condi

CIO-MINI37



– 37-pin screw terminal board. Details on this product are available on our web site at

www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=102&pf_id=1543

CIO-SPADE50 – 16" X 4" termination panel which mates with both 37-pin and 50-pin connectors. Details



SSR-RACK08 – 8-channel, solid-state relay mounting rack for digital signal conditioning. Details on this



tioning products with the CIO-DIO24H.

.

.

ew.pdfon this product are available on our web site at www.mccdaq.com/pdfs/scr

product are available on our web site at

www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=122&pf_id=620

SSR-RACK24 – 24-channel, solid-state r



elay mounting rack for digital signal conditioning. Details on this

.

product are available on our web site at

www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=122&pf_id=1193

CIO-ERB08 – 24 Form C relays, 6 Amp



relay accessory board for digital signal conditioning. Details on

.

this product are available on our web site at

www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=123&pf_id=240

CIO-ERB24 – 24 Form C relays, 6 Amp relay



accessory board for digital signal conditioning. Details on

.

this product are available on our web site at

www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=123&pf_id=241

.

formation on signal connections In

General information regarding signal connection and configuration is available in the Guide to Signal
Connections. This document is available on our web site at www.mccdaq.com/signals/signals.pdf.

14

Chapter 3

Functional Details

All of the digital outputs and inputs are CMOS TTL (Transistor-Transistor Logic). TTL is an industry term that
describes a standard for digital signals which are either at 0 V or 5 V (nominal).

The voltages and currents associated with external devices range from less than a hundred mA at a few volts for
lamps etc., to 50 Amps at 220 volts for electric heaters or other high-load equipment. Attempting to connect
such loads directly to the CIO-DIO24H will damage the I/O chip. Heavy loads such as these require external
relays.

Digital Interfacing

In addition to load matching, digital signal sources often need to be filtered or "de-bounced". Refer to the Guide
to Signal Connections at www.mccdaq.com/signals/signals.pdf for information on digital interfacing.

82C55 emulation

The CIO-DIO24H emulates the 82C55 chip. The 82C55 emulation initializes all ports as inputs on power-up
and reset. A TTL input is a high impedance input. If you connect another TTL input device to the output, it
could be turned on or off every time the board is reset.

To establish a consistent TTL level at power-up, use resistors tied to either +5V (pull-up) or ground (pull­down). There are open locations for pull-up and pull-down resistor packs on the board.

Whenever an 82C55 emulation is powered on or reset, all pins are set to high-impedance input. Based on
standard TTL functionality, these inputs will typically float high, and may have enough drive current to turn on
external devices.

Consequently, if you have output devices such as solid state relays, they may be switched on whenever the
computer is powered on or reset. To prevent unwanted switching, and to drive all outputs to a known state after
power on or reset, pull all pins either high or low through a 2.2 K resistor.

Signal level control

The 82C55 digital I/O chip initializes all ports as inputs on power- up and reset. A TTL input is a high
impedance input. If you connect another TTL input device to the 82C55 it could be turned ON or OFF every
time the 82C55 is 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. If you are using the board to control items that
must be OFF on reset, install 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 CIO-DIO24H has open locations where you can install a single inline package (SIP) resistor network for
each port. When installed, the SIP establishes either a high or low logic level at each of the I/O lines on the
port.

The SIP is made up of eight 2.2 KΩ resistors. One side of each resistor is connected to a single common point
and brought out to a pin. The common line is marked with a dot or line at one end of the SIP. The remaining
resistor ends are brought out to the other eight pins (see ). Figure 8

15

CIO-DIO24H User's Guide Functional Details

2.2KOhm SIP

Dot indicates the
common line

(LO or HI)

I/O Lines

Figure 8. Eight-resistor SIP schematic

Install the SIP on the CIO-DIO24H board at the locations labeled PORT A, PORT B and PORT C. Fi

gure 9
shows a schematic of an SIP installed in both the pull-up and pull-down positions. Each port provides 10 holes
in a line. The end labeled

HI connects to +5V. The end marked LO connects to GND. The eight holes in the

middle (n0 –n7) connect to the eight lines of the Port, A, B or C.

Digital

I/O

Port

n = A, B, or C

+5 VDC

HI

n7

n6

n5

n4

n3

n2

n1

n0

LO
(GND)

2.2 K SIP

COM

Dot

Digital

User Connector

Digital I/O Lines

n = A, B, or C

I/O

Port

+5 VDC

HI

n7

n6

n5

n4

n3

n2

n1

n0

LO
(GND)

2.2 K SIP

COM

Dot

User Connector

Digital I/O Lines

2.2 K SIP installed for pull-up

2.2 K SIP installed for pull-down

Figure 9. Pull-up and pull-down resistor SIPs schematic

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.

When installing pull-up and pull-down resistor SIP packs, we recommend using 2.2K, eight-resistor Single
Inline Packages (MCC part number SP-K2.29C). Use a different value only if necessary.

Unconnected inputs float

Unconnected inputs typically float high, but not reliably. If you are using a CIO-DIO24H for input and have
unconnected inputs, ignore the data from those lines. You do not have to terminate input lines. Unconnected
lines will not affect the performance of connected lines. Mask out any unconnected bits in software.

Digital I/O Isolation

To provide external signal conditioning and isolation, you can connect the CIO-DIO24H to a CIO-ERB24 or
SSR-RACK24. The CIO-ERB24 provides 24 Form C electromechanical relays. The SSR-RACK24 is a
mounting rack for 24 solid-state relays.

16

Chapter 4

Programming and Developing Applications

After following the installation instructions in Chapter 2, your board should now be installed and ready for use.
In general there may be no correspondence among registers for different boards. Software written at the register
level for other models will not function correctly with your board.

Programming languages

Measurement Computing's Universal Library provides access to board functions from a variety of Windows
programming languages. If you are planning to write programs, or would like to run the example programs for
Visual Basic or any other language, refer to the Universal Library User's Guide (available on our web site at

Packaged applications programs

Many packaged application programs now have drivers for your board. If the package you own does not have
drivers for your board, please fax or e-mail the package name and the revision number from the install disks.
We will research the package for you and advise how to obtain drivers.

).

Some application drivers are included with the Universal Library package, but not with the application package.
If you have purchased an application package directly from the software vendor, you may need to purchase our
Universal Library and drivers. Please contact us by phone, fax or e-mail:

 Phone: [phone] and follow the instructions for reaching Tech Support.
 Fax: [phone] to the attention of Tech Support
 Email: [e-mail]

Register-level programming

You should use the Universal Library or one of the packaged application programs mentioned above to control
your board. Only experienced programmers should try register-level programming.

If you need to program at the register level in your application, refer to the Register Map for the
CIO-DIO24, CIO-DIO24H, and CIO-DIO24/CTR3. This document is available on our website at

www.mccdaq.com/registermaps/RegMapCIO-DIO24-Series.pdf

.

17

Chapter 5

Specifications

Typical for 25 °C unless otherwise specified.

Specifications in italic text are guaranteed by design.

Digital Input / Output

Table 1. Digital input/output specifications

Digital type 82C55, mode 0 emulation

 Output: 74S244
 Input: 74LS373

Configuration 2 banks of 8, 2 banks of 4, programmable by bank as input or output

Number of channels 24 I/O

Output high 2.4 volts min @ -15 mA

Output low 0.5 volts max @ 64 mA

Input high 2.0 volts min, 7 volts absolute max

Input low 0.8 volts max, -0.5 volts absolute min

Power-up / reset state Input mode (high impedance)

Interrupts 2 through 7, jumper selectable

Interrupt enable External (IR Enable), logic low enabled (disabled by default via internal

10k resistor to +5V)

Interrupt sources External (IR Input), rising edge

Miscellaneous Locations provided for installation of pull-up or pull-down resistors.

Power consumption

Table 2. Power consumption specifications

Parameter Specification

+5V

 All ports input mode: 550 mA typical, 700 maximum
 All ports output mode, all bits low: 500 mA typical
 All ports output mode, all bits high: 360 mA typical

Environmental

Table 3. Environmental specifications

Operating temperature range 0 to 70 °C

Storage temperature range -40 to +100 °C

Humidity 0 to 90% non-condensing

18

CIO-DIO24H User's Guide Specifications

Main connector and pin out

Table 4. Connector specifications

Connector type 37-pin male "D" connector

Compatible cables C37FF-x

C37-FFS-x

DFCON-37 (D-connector, D-shell, and termination pins to construct your
own cable)

Compatible accessory products with the
C37FF-x cable and C37FFS-x cable

Pin Signal Name Pin Signal Name

1 IR Input 20 +5V
2 IR Enable 21 GND
3 FIRSPORTB Bit 7 22 FIRSPORTC Bit 7
4 FIRSPORTB Bit 6 23 FIRSPORTC Bit 6
5 FIRSPORTB Bit 5 24 FIRSPORTC Bit 5
6 FIRSPORTB Bit 4 25 FIRSPORTC Bit 4
7 FIRSPORTB Bit 3 26 FIRSPORTC Bit 3
8 FIRSPORTB Bit 2 27 FIRSPORTC Bit 2
9 FIRSPORTB Bit 1 28 FIRSPORTC Bit 1
10 FIRSPORTB Bit 0 29 FIRSPORTC Bit 0
11 GND 30 FIRSPORTA Bit 7
12 -5V 31 FIRSPORTA Bit 6
13 GND 32 FIRSPORTA Bit 5
14 -12V 33 FIRSPORTA Bit 4
15 GND 34 FIRSPORTA Bit 3
16 +12V 35 FIRSPORTA Bit 2
17 GND 36 FIRSPORTA Bit 1
18 +5V 37 FIRSPORTA Bit 0
19 GND

CIO-MINI37

CIO-SPADE50

SSR-RACK08

SSR-RACK24

CIO-ERB08

CIO-ERB24

Table 5. Connector pin out

19

Declaration of Conformity

Manufacturer: Measurement Computing Corporation
Address: 10 Commerce Way
Suite 1008
Norton, MA 02766
USA

Category: Electrical equipment for measurement, control and laboratory use.

Measurement Computing Corporation declares under sole responsibility that the product

CIO-DIO24H

to which this declaration relates is in conformity with the relevant provisions of the following standards or
other documents:

EU EMC Directive 89/336/EEC: Electromagnetic Compatibility, EN55022 (1987), EN50082-1

Emissions: Group 1, Class B

 EN55022 (1987): Radiated and Conducted emissions.

Immunity: EN50082-1

 IEC 801-2 (1987): Electrostatic Discharge immunity, Criteria B.
 IEC 801-3 (1984): Radiated Electromagnetic Field immunity Criteria A.
 IEC 801-4 (1988): Electric Fast Transient Burst immunity Criteria B.

Declaration of Conformity based on tests conducted by Chomerics Test Services, Woburn, MA 01801, USA in
December, 1995. Test records are outlined in Chomerics Test Report #EMI0168B.95.

We hereby declare that the equipment specified conforms to the above Directives and Standards.

Carl Haapaoja, Director of Quality Assurance

Measurement Computing Corporation

10 Commerce Way

Suite 1008

Norton, Massachusetts 02766

[phone]

Fax: [phone]

E-mail: [e-mail]

www.mccdaq.com