PCIe-DIO24
Digital Input/Output

User's Guide

September 2018. Rev 3© Measurement Computing Corporation

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PCIe-DIO24

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
Chapter 1

Introducing the PCIe-DIO24 ................................................................................................................. 5
Functional block diagram ................................................................................................................................... 6
Chapter 2

Installing the PCIe-DIO24 ..................................................................................................................... 7
Unpacking........................................................................................................................................................... 7
Installing the software ........................................................................................................................................ 7Installing the hardware ....................................................................................................................................... 7
Signal connections .............................................................................................................................................. 8Connector pinout............................................................................................................................................................... 8Cabling.............................................................................................................................................................................. 9
Field wiring and signal termination .................................................................................................................................. 9

Chapter 3

Functional Details ............................................................................................................................... 10
82C55 emulation............................................................................................................................................... 10
Replacing a fuse................................................................................................................................................ 10
Fuse specifications ...........................................................................................................................................................10

Logic level switch ............................................................................................................................................. 10
Chapter 4

Specifications ...................................................................................................................................... 11
Digital input/output........................................................................................................................................... 11Power consumption .......................................................................................................................................... 11
Environmental .................................................................................................................................................. 12
Mechanical ....................................................................................................................................................... 12
Bus .................................................................................................................................................................... 12
Signal connector ............................................................................................................................................... 12
Declaration of Conformity .................................................................................................................. 14

3

Preface

About this User's Guide
What you will learn from this user's guideThis user's guide describes the Measurement Computing PCIe-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 related to the subject matter.
Caution! Shaded caution statements present information to help you avoid injuring yourself and others,
damaging your hardware, or losing your data.
bold text

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

italic text

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 PCIe-DIO24 hardware is available on our website at www.mccdaq.com. You canalso contact Measurement Computing Corporation 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.
If you need to program at the register level in your application, refer to the Register Map for the PCIe-DIO24
on our website at www.mccdaq.com/registermaps/RegMapPCIe-DIO24.pdf.

4Chapter 1

Introducing the PCIe-DIO24
This manual explains how to install and use the PCIe-DIO24 board. The PCIe-DIO24 is a digital I/O board
designed for the PCI Express (PCIe) bus.
The PCIe-DIO24 provides 24 lines of digital I/O with selectable 3.3 V and 5 V logic levels. The 24 DIO lines
are organized into three groups of 8-bits each (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). The direction of each port is independently configurable with
software for either input or output. Digital outputs are HC logic and can source and sink 2.5 mA.
The PCIe-DIO24 has a 10 k resistor network associated with each digital port. You can configure each port for
pull-up or pull-down with software. On power up and reset the configuration of each port is read from
EEPROM. The board is shipped with each port configured in the pull-up state.
82C55 support for mode 0 onlyThe PCIe-DIO24 emulates the 82C55 Programmable Peripheral Interface (PPI) chip. The PCIe-DIO24
hardware, Universal Library software, and Windows driver support mode 0 only.
Digital I/O lines are accessible through a 37-pin D-type connector. The board has two individual slow blow
fuses rated at 0.375 amp to protect the +VDIO and +12V outputs on the connector. One spare fuse is provided.
Software programs written with the Universal Library for the USB-DIO24/37, PCI-DIO24 and CIO-DIO24
devices are fully compatible with the PCIe-DIO24.
Power is provided by the PCI Express slot. The PCIe-DIO24 board is completely plug-and-play. All boardaddresses are set by the board's plug-and-play software. Board configuration is controlled by the system BIOS.

5PCIe-DIO24 User's Guide

Introducing the PCIe-DIO24

Functional block diagram
PCIe-DIO24 functions are illustrated in the block diagram shown here.
+12V+12V(pin 16)+V DIO(pin 18)+V DIO
Regulated

Fuse
Protection

Spare Fuse
VDIO and 12V

Fuse
Protection

1.5V
Regulator+V DIO(pin 20)

3.3V

3.3V Board Power+5 (VDD)

3.3V

5V
Regulator

37-pin I/O Connector

IRQ Enable

8PORT A
Buffering

8PORT B
Buffering

PORT CL
Buffering

4

PORT CH
Buffering4

3.3/5VPORT A
Direction CTR
3.3/5VPORT B
Direction CTR
3.3/5VPORT CL
Direction CTR

PCIe-to-PCI
Bridge88Complex,
Programmable
Logic Device(CPLD)

4

3.3/5VPORT CH
Direction CTR

42410 kΩPull
Resistor
Network

4

BufferVDIO

4EEPROM
switch4Direction
Control

Logic, Control,Interface
Decode/Status
82C55 Emulation+5V (VDD)
GND

BusTimingPCI-to-Local
Bus

LAD(0:7)
8LocalAddress&Data Bus

User
3.3/5VI/O Switch
5V 3.3 V(VDD)

Figure 1. PCIe-DIO24 functional block diagram

6PCI Bus

3.3V, 32-bit, 66 MHz

BADR2+BADR3Boot
EEPROM

x1 Link

PCI Express Edge Connector

IRQ Input

Chapter 2Installing the PCIe-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 PCIe-DIO24 product page on our website for information about thesoftware supported by the device.
Install the software before you install your device
The driver needed to run the PCIe-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 PCIe-DIO24 is completely plug-and-play. Configuration is controlled by your system's BIOS. To installyour board, follow the steps below.
1.

Power off and unplug the computer and remove the cover to expose the expansion slots.

2.

Touch any metal part of the computer to discharge static electricity that may be present. Static electricity
can damage the board.

3.

Insert the PCIe-DIO24 into an unused x1 PCIe expansion slot.
The PCIe-DIO24 is designed to install into an x1 slot. However, you can also install the board into anunused x4, x8, or x16 PCIe slot.

Caution! Ensure that you install the board into a PCIe slot. Installing the PCIe-DIO24 into a non-PCIe slot
can damage both the board and the computer motherboard.
4.

Close your computer and turn it on.
A dialog box opens as the system loads, indicating that new hardware has been detected. The information
file for this board should have already been loaded onto your PC when you installed MCC DAQ software,and should be detected automatically by Windows. If you have not installed this software, cancel the dialog
and install it now.

5.

Run InstaCal to test your installation and to configure the pull direction of the digital port resistors.
Refer to the MCC DAQ Quick Start that came with your board for information on how to initially set up
InstaCal.

7

PCIe-DIO24 User's Guide

Installing the PCIe-DIO24

Signal connections
The table below lists the board I/O connector, applicable cables and compatible accessory boards.
Board connectors, cables, 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-SERB08
CIO-MINI37
CIO-ERB24
CIO-MINI37-VERT
SSR-RACK08
CIO-ERB08
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 logic level switch sets the logic level for either 3.3V or 5V; refer topage 10 for switch information.
+5V

Logic levelswitch
3V+VDIO *GNDPORT C7
PORT C6PORT C5
PORT C4PORT C3PORT C2PORT C1PORT C0
PORT A7
PORT A6
PORT A5
PORT A4PORT A3
PORT A2
PORT A1
PORT A020212223242526272829303132333435363712345678910111213141516171819

IRQ INPUT
IRQ ENABLE
PORT B7
PORT B6
PORT B5
PORT B4
PORT B3
PORT B2
PORT B1
PORT B0
GND
Open
GND
Open
GND+12V*
GND+VDIO*GND

Figure 2. I/O connector* The board has two individual slow blow fuses rated at 1 A. One fuse protects the 12V output at pin 16, andone fuse protects both +VDIO outputs at pin 18 and pin 20.

8

PCIe-DIO24 User's Guide

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

1120

20

3737

1919

Figure 3. C37FF-x cable119120

37

1920

37

Figure 4. C37FFS-x cable

Field wiring and signal termination
You can use the following MCC screw terminal boards and relay racks with the PCIe-DIO24 board using theC37FF-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.
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.
More information about digital interfacing
Detailed information regarding digital interfacing is contained in the Guide to DAQ Signal Connections on ourwebsite at www.mccdaq.com/support/DAQ-Signal-Connections.aspx.

9Chapter 3

Functional Details
82C55 emulation
The PCIe-DIO24 emulates the 82C55 Programmable Peripheral Interface (PPI) chip. The PCIe-DIO24
hardware, Universal Library software, and Windows driver support mode 0 only.
Whenever the board is powered on or reset, all pins are set to high-impedance input. Based on standard TTL
functionality, these inputs 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 thecomputer is powered on or reset. To prevent unwanted switching, and to drive all outputs to a known state after
power on or reset, configure each port resistor with InstaCal.
Unconnected inputs float to the pull direction
Unconnected inputs will float in the pull direction that is configured for the port with InstaCal (either up/high ordown/low).

Replacing a fuse
The PCIe-DIO24 has two individual 0.375 amp slow blow fuses. One fuse is connected to the 12V output at pin
16, and is labeled F7 on the board. The second fuse is connected to both +VDIO outputs at pin 18 and pin 20, andis labeled F6 on the board. A spare fuse is installed on the board at location F4. All fuses are secured to theboard with clips for convenient replacement.
A fuse will blow during operation if amperage exceeds 0.375 amp. If you need to replace a fuse, perform thefollowing procedure.
1.

Hold the center of the blown fuse and pry it from the fuse holder clip.

2.

Insert the replacement fuse into the fuse holder clip.

Fuse specifications
Refer to the information below to purchase additional fuses, if required:

Manufacturer: LittelFuse®
Type: 452 Series NANO2® Slo-Blo® Subminiature Surface Mount Fuse
Part number: 0452.375
0.375 amp, 125 volts, 1.2 ΩLogic level switch
Use switch S1 to set the logic level for either 3.3V or 5V (default). The switch is located above the I/O
connector (see Figure 2 on page 8).
5V
S1
3.3V
Figure 5. Logic level select switch

10Chapter 4

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

Digital input/output
Table 1. Digital I/O specifications
Parameter

Specification

Digital type
Configuration

82C55 Emulation (mode 0 only)
2 banks of 8, 2 banks of 4, programmable by bank as input or output
Ports A and B: 74HC245A
Port C:
74HC126
Ports A and B: 74HC245A
Port C:74HC125
24 I/OBoard silk screen reference: S1 – Default +5V
2.8 volts min @ -2.5 mA
0.3 volts max @ 2.5 mA
2.6 volts min, 3.6 volts absolute max
1.3 volts max, -0.5 volts absolute min
4.5 volts min @ -2.5 mA
0.3 volts max @ 2.5 mA
2.6 volts min, 5.5 volts absolute max
1.3 volts max, -0.5 volts absolute min
Input mode (10 kΩ impedance from pull-up or pull-down)

Output
Input
Number of channels
Switch stateOutput highOutput low
Input highInput low
Output highOutput low
Input highInput low
Power-up /reset state

3.3 V

5V

Pull-up/pull-down resistors
Interrupt enable
Interrupt sources

EEPROM stored; software programmable driven by 74ACT244 through 10 kΩ bussed
resistor networks (shipped in the pull-up state)
External (IRQ ENABLE, active low, disabled by default through internal resistor to TTLhigh) and programmable through PCI9030; 0 = disabled, 1 = enabled (default)
External source (IRQ INPUT), polarity programmable through PCI9030;
1 = active high, 0 = active low (default)

Power consumption
Table 2. Power consumption specificationsParameter

Specification+3.3 V operating+3.3 V with 5 V I/O+VDIO User output

515 mA typ
520 mA typ
125 mA max @ +5V; 375 mA max @ +3.3 V+VDIO User output and +12 V:
Littelfuse 0.375A NANO2® Slo-Blo® Subminiature Surface Mount Fuse; art number
0452.375

Fuses

11

PCIe-DIO24 User's Guide

Specifications

Environmental
Table 3. Environmental specifications
Parameter

Specification

Operating temperature range
Storage temperature range
Humidity

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

Mechanical
Table 4. Environmental specifications
Parameter

Specification

Dimensions (L × W × H)

167.4 × 111.2 × 18.72 mm (6.60 × 4.38 × 0.74 in.)Bus
Table 5. Bus specifications
Parameter

Specification

Bus Type
Bus Width

PCI Express 1.1
x1 lane PCI Express

Signal connector
Table 6. Main connector specifications
Parameter

Specification

Connector type37-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

Compatible cables
Compatible accessory products(with the C37FF-x or
C37FFS-x cable)
Compatible accessory productswith S1 in the +5 V
position(with the C37FF-x or
C37FFS-x cable)

CIO-ERB08
CIO-SERB08
CIO-ERB24

SSR-RACK08
SSR-RACK2412PCIe-DIO24 User's Guide

Specifications

Table 7. Signal connector pinout
Pin12345678910111213
141516171819

Note 1:Signal NameIRQ INPUT
IRQ ENABLE
Port B7
Port B6
Port B5
Port B4
Port B3
Port B2
Port B1
Port B0
GND
OPEN
GND
OPEN
GND+12V (Note 1)
GND+VDIO (Note 1)
GND

Pin202122232425262728293031323334353637Signal Name+VDIO (Note 1)
GND
Port C7Port C6Port C5Port C4Port C3
Port C2Port C1
Port C0Port A7
Port A6
Port A5Port A4
Port A3
Port A2
Port A1
Port A0

Protected by slow blow fuses rated at 0.375 A. One fuse protects pin 16 (+12V), and the second fuse protects
pin 18 (+VDIO) and pin 20 (+VDIO).

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

Measurement Computing Corporation
10 Commerce Way
Suite 1008
Norton, MA 02766
USAProduct Category:
Date and Place of Issue:

Electrical equipment for measurement, control and laboratory use.
September 12, 2014, Norton, Massachusetts USA

Measurement Computing Corporation declares under sole responsibility that the product

PCIe-DIO24
Complies with the essential requirements of the following applicable European Directives:
Electromagnetic Compatibility (EMC) Directive 2004/108/EC
Low Voltage Directive 2006/95/EC
RoHS Directive 2011/65/EU
Conformity is assessed in accordance to the following standards:
EMC:
Emissions: EN 61326-1:2006 (IEC 61326-1:2005), Class A
 EN 55011: 2007 (IEC CISPR 11:2003), Group 1, Class A
Immunity: EN 61326-1:2006 (IEC 61326-1:2005), Controlled EM Environments EN 61000-4-2:2001 (IEC 61000-4-2:2001)
 EN 61000-4-3 :2002 (IEC61000-4-3:2002)
 EN 61000-4-4 :2004 (IEC61000-4-4:2004)
 EN 61000-4-5 :2001 (IEC61000-4-5:2001)
 EN 61000-4-6 :2007 (IEC61000-4-6:2003)
 EN 61000-4-11:2004 (IEC61000-4-11:2004)
Safety: EN610101-1 (IEC61010-1)
Environmental Affairs:
Articles manufactured on or after the Date of Issue of this Declaration of Conformity do notcontain any of the restricted 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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