mPCIe-ISODIO-16 Isolated Digital I/O Card

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  • PCI Express Mini Card (mPCIe) Type F1, with Latching I/O Connector
  • 8 Isolated Inputs
  • 8 Isolated Outputs
  • 3.3V Signaling
  • Using the Latest Isolation Technology with 5000V Isolators
  • Per IPC-22B: 1500V Isolation-I/O-to Computer on All Signals
  • Change-of-State (COS) Detection IRQ Generation
  • 18KV ESD Diode Protection
  • On-Board 32-Bit Timer Watchdog to Reset Board to Default Power-Up Values
  • RoHS Compliant
  • Designed, made, supported, and manufactured in the USA


  • Extended temperature operation (-40°C to +85°C)
Last updated on March 5, 2024, 11:20 am


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The mPCIe-ISODIO-16 is a type F1 PCI Express Mini Card (mPCIe) that provides 8 isolated digital inputs and 8 isolated digital outputs. Featuring Tru-Iso™ I/O-to-PC isolation this card provides a robust solution to common signal level and grounding issues when used in electrically noisy environments; at up to 1500V between I/O and the host computer, it’s like data insurance.

Change of State (COS) detection and interrupt generation capabilities are designed to relieve software from polling routines that consume valuable processing time. Inputs can be programmed for detecting state changes on their lines, in which any changes of the bits (low-to-high or high-to-low) will generate an IRQ. An ISR (interrupt service routine) then determines which bit changed state and clears the interrupt.

Integration with your embedded system couldn’t be easier using our optional 9” cable assembly (DSub 25 pin female connector) designed to be panel-mounted to the enclosure, or in any application environment.


Special Order

Please contact ACCES with your precise requirement. Examples of special orders would be conformal coating, custom software or product labeling, and more. We will work with you to provide exactly what is required.

Accessories and Connections

Available accessories include a variety of screw terminal boards for quick and easy connectivity as well as 2mm and 2.5mm mounting hardware. Alternately, custom hardware cables and/or interfaces can be produced to fit your specific application requirement.


The card is supported for use in most operating systems and includes a free DOS, Linux , and Windows 2000/XP/2003/Vista/7/8/10 compatible software package. This package contains sample programs and source code in Visual Basic, Delphi, and Visual C++ for Windows. Also provided is a graphical setup program in Windows. Linux support includes installation files and basic samples for programming from user level via an open source kernel driver. Third party support includes a Windows standard DLL interface usable from the most popular application programs, and includes LabVIEW 8.5+ VIs. Embedded OS support includes Windows XPe, WES7, WES8, vxWorks, etc. Full register-level documentation of all features ensures easy compatibility in any application environment.


Data Sheets



Drivers and Downloads

Full list of available Downloads: Software Packages, Drivers, Manuals, and other documents

Information about our Free Software packages:

ACCES is proud to provide a full suite of software support with every Data Acquisition product. We are committed to supporting the most popular operating systems and platforms for our customers. Currently we are actively supporting XP -> 10, both 32 & 64 bit, including “Server 2008,” “Embedded,” and “Compact” flavors for all plug-and-play products including PCI, PCI Express, USB, and more. Many products continue to ship with support for additional operating systems such as DOS, Windows 95, 98, Me, NT4, and 2000.


Among the software we deliver with our products are sample programs in a wide variety of programming languages. These samples are used to demonstrate the software interfaces to our products — and many can be used as-is in your production environments, or to test functionality of the devices out-of-the-box. We’re currently actively supporting sample programs in Microsoft Visual C#, Visual Basic, Delphi, and Visual C/C++, with many devices including samples in Borland C/C++ 3.1 for DOS. Additionally we provide National Instruments LabVIEW compatible DLLs and many demonstration VIs for our devices.


Drivers for various operating systems are also provided, including active support for Windows XP -> 10 — all in both 32-bit and 64-bit flavors, and including consumer, server, and embedded varieties — as well as the 2.6 and newer Linux kernels and recent OSX / macOS versions. Many products continue to ship with driver support for Windows 95, 98, Me, NT4, and Windows 2000, but support for these operating systems is considered deprecated.

Setup Programs and Utilites

Our Data Acquisition devices also include a graphical setup utility that walks you through the process of configuring any option jumpers or switches on the device, as well as explaining a little about the various connectors present.

Many devices also include utility programs – little tools to make your use of the device easier, such as EWriter, a program that allows you to read and write data in the user-accessible EEPROM locations on all our USB data acquisitition products; or WinRISC, a “Really Incredibly Simple Communications” terminal program that lets you get started instantly with serial devices.

“Register Level” Documentation

Besides all this software in all these languages and operating systems ACCES has a policy of open and transparent development: none of our lowest-level “register” interfaces are hidden from you — we document every register in every bus card, every command in every serial board, and every usb control transfer in every USB Data Acquisition board. These lowest-level interfaces allow you to develop for our products in ANY operating system or language, regardless of our actively supporting it or having a driver for it. We have customers actively developing in ADA, Android, Python, Java, MATLAB, Solaris, and more, just by referring to our complete low-level interface documentation! And we provide the full source code to all of our drivers, regardless of operating system, to give you an even bigger head start in your own development tasks.

No Fees or Royalties

All of this software is provided at no additional charge, and is licensed under any of a variety of flexible — and royalty free — options. Check out our software license explanation if you’d like more information.

Custom Software

ACCES also offers Custom Software Services for our products. Our prices are unbelievably low, often as inexpensive as free! If you need something tweaked to support your needs, or an entire enterprise application developed from scratch, it is definitely worth your time to inquire with us, first.

Further information about available ACCES Software:

Redistributing Windows Drivers
A list of ACCES drivers and the files that compose them under different versions of Windows, so you can easily redistribute ACCES cards and drivers.


ACCES has successfully partnered with Wind River to bring our entire line of PCI and PCI Express DAQ cards to VxWorks 7!

VxWorks 7 VxBus Gen 2 drivers, with easy-to-use API-libraries, are available for this product, including full source and sample code.

Designed to be compatible with our AIOWDM.dll Windows driver & API, this kernel module adds zero% CPU-cycle overhead to your VxWorks runtimes while allowing the lowest-latency hardware register access possible.

You can find more information about our VxWorks libraries and services on our Wind River Silver Partner page.

PC Interface

  • PCI Express Mini Card: Type F1 “Full Length” V1.2

Isolated Inputs

  • Number: 8
  • Logic High: 2.0V to 5V
  • Logic Low 0V to 0.8V

Isolated Outputs

  • Number: 8
  • Logic High: 2.0V (min), source 32mA
  • Logic Low: 0.55V (max), sink 64mA
  • Power Output: +3.3VDC via 50mA polyfuse (resetting


  • Tru-ISO: IPC-2221B
  • I/O to PC:
    • 1500 V peak (AC or DC)
    • UL-1577
    • UL recognition (pending): 5000 V rms for 1 minute
  • Careful attention has been paid to isolation design, including extensive keep-out zones and hand-routed circuit paths, as well as component and material selection


  • Temperature
    • Operating: 0°C to 70°C
      (order -T option for industrial temperature -40°C to 85°C)
    • Storage: -65°C to 150°C
  • Humidity: 5% to 95% RH, non-condensing
  • Power required:
    • +3.3VDC @ 500ma
    • +1.5VDC @ 415mA


  • mPCIe card characteristics
    • Weight: 7.2 grams
    • Size
      • Length: 50.95mm (2.006″)
      • Width: 30.00mm (1.181″)
    • On-board I/O connector
      • On-card: Molex 501190-2017 20-pin latching
      • Mating: Molex 501189-2010
    • On-cable I/O connector
      • On-cable: Female, D-Sub Miniature, 25-pin
      • Mating: Male, D-Sub Miniature, 25-pin

Regulatory Compliance

  • This product is designed to be in full compliance with CE requirements.
ModelDescriptionPrice (USD)

Isolated Digital Input & Output mPCIe Card

Cable Accessory
CAB-mPCIe-ISODIO Cable Assembly, 20 pin to DB25F, 9”
Terminal Cards
ADAP25M 25 Pin Screw Terminal Accessory
mPCIe Card Mounting Hardware
mPCIe-HDW-KIT2 2mm mounting hardware $1
mPCIe-HDW-KIT2.5 2.5mm mounting hardware $1
Model Options (call for pricing)
-T Extended temperature operation (-40° to +85°C)