PCIe-DIO-48JPLS Digital I/O Card

ACCES: Committed to Service

We're here to help!

Let our amazing support staff help you with questions: whether finding the right model for you, or technical support on using the product - or figuring out what's wrong - we have the expertise to help you. Use it!

Call, E-Mail, or Chat, Today!


  • 48 or 24 channel high-current TTL digital I/O lines
  • Change of State (COS) detection and interrupt capabilities
  • Compatible with industry standard 8255 PPI
  • 68-pin SCSI pin-in-socket female connector on card mounting bracket
  • User interrupt pin
  • All 48 digital I/O lines buffered with 32mA source / 64mA sink
  • Four and eight bit ports independently selectable for inputs or outputs
  • Jumper configurable pull-ups/-downs on DIO lines
  • 5V or 3.3V VCCIO configurable by jumper selection
  • Poly-fused VCCIO available to the user on each I/O header
  • Easy upgrade from PCI-DIO-48JPLS Family devices
  • Designed, made, supported, and manufactured in the USA


  • Non-latching connector
  • Card without Change-of-State IRQ feature
  • RoHS compliant version
  • Extended temperature operation (-40°C to +85°C)
  • Support for Wind River VxWorks (call for ordering information)
Last updated on November 2, 2023, 6:24 pm


In Stock
SKU: N/A Categories: , Tags: ,


The PCIe-DIO-48JPS is a 48 channel PCI Express (PCIe) card designed for use in a variety of digital I/O applications. It uses the high speed PCI Express bus to transfer digital data to and from the card. The digital I/O is compatible with 8255 PPI chips making it easy to program. This also allows for simple and trouble-free migration from other ACCES PCI digital I/O cards . The card features a x1 lane PCI Express connector which can be used in any available x1, x2, x4, x8, x12, or x16 PCI Express expansion slot. The card is 6.6 inches in length and 4.2 inches seated height.

Two 24 line groups each have three 8-bit I/O ports designated A, B and C. Port C can be further divided into two 4-bit nybbles. Each port can be programmed as inputs or outputs. Change of State (COS) detection and interrupt capabilities are designed to relieve software from polling routines that can consume valuable processing time. Each port can be programmed for detecting state changes on their lines, in which any changes of the enabled port’s bits (low-to-high or high-to-low) will generate an IRQ. An ISR (interrupt service routine) then polls the port to determine which bit changed state and clear the interrupt.

This card is an excellent choice for system designs that would benefit from using a wiring harness to connect up to a complete system. This is due to the 68-pin I/O connector being located on the card mounting bracket, it is a much cleaner card solution to use compared to routing ribbon cables through a cutout on the card mounting bracket, then plugging them onto the headers on the side of the card.


The PCIe-DIO-48JPLS is excellent for use in a multitude of applications requiring digital control or monitoring such as in test equipment, instrumentation, lab automation, and process control. The board is capable of monitoring electrical devices such as motor controllers, powered switches, dry contacts, thermostats, limit switches, push buttons etc.. The PCIe-DIO-48JPLS Series can be used in the following markets.

  • Process Monitoring
  • Manufacturing/Production Test
  • Machine Control
  • Monitoring and Control
  • Security Systems, Energy Management
  • Industrial Automation
  • Factory Automation
  • Laboratory Automation
  • Embedded OEM


Available accessories include ribbon cables and shielded round-wire molded cable assemblies. Screw terminal boards and DIN-rail mounts are also available for a variety of quick and easy connectivity options.


The card is supported for use in most operating systems and includes a free Linux and Windows 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. Embedded OS support includes the family of Windows Operating Systems including IoT. ACCES is also now offering a VxWorks driver/library for the ultimate real-time process monitoring and control solution.




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.

Block Diagram

Digital Signaling

  • VCCIO 5V (TTL) or 3.3V (LVTTL)

Digital Inputs

  • Logic High 2.0V to VCCIO
  • Logic Low 0V to 0.8V
  • Current ±20uA (max)

Digital Ouputs

  • Logic High 2.0V (min); 32mA source
  • Logic Low 0.55V (max); 64mA sink
  • Power Output VCCIO Via 0.5A resettable fuse


  • Operating Temperature: Commercial 0° to 70°C; optional Industrial -40° to +85°C
  • Storage Temperature: -55° to +150° C
  • Humidity: 5% to 95%, non-condensing.
  • Card Dimensions: 6.62″ long by 4.2″ high (seated)
  • I/O Connector TE Receptacle Assy, .050 Series, Amplimite P/N 1761028-4

Regulatory Compliance

This product is in full compliance with CE requirements.

ModelDescriptionPrice (USD)

48 Digital I/O with 68-pin SCSI connector, Latching


48 Digital I/O with CoS IRQ and 68-pin SCSI connector, Latching


48 Digital I/O with 68-pin SCSI connector


48 Digital I/O with CoS IRQ and 68-pin SCSI connector

C68PS18L Shielded latching cable, 18”
CAB68-36L Shielded latching cable, 36”
CAB68-36J Shielded jackscrew cable, 36”
STB-68 Screw terminal board with connector latches
STB-68-S01 Screw terminal board with connector screwlocks