104e-mPCIe-4   PCIe/104 4×4 or 2×2 mPCIe Carrier Boards

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  • Converts four PCIe x1 lanes from stack into four PCI Express Mini Card sockets
  • Supports half- or full-size mPCIe cards, for use in a Type 1 or Type 2 PCIe/104 stack
  • All four sockets support USB, SMBUS, micro-SIM, as well as PCI Express signals
  • mSATA devices supported on two sockets (Type 2)
  • Powered from the PCIe/104 stack +5V rail, no 12V needed
  • 2mm standoffs integrated into design for easy installation, hardware included
  • RoHS and industrial temp (-40°C to 85°C) standard
  • Designed, made, supported, and manufactured in the USA


  • Top stacking (-TOP) (designed for use on top of stack)
  • One Bank connector (-1B)
Last updated on November 2, 2023, 6:25 pm


In Stock


The 104e-mPCIe-4 is a Type 1 or Type 2 PCIe/104 carrier board designed to support up to four PCI Express mini cards, in either half or full lengths. In addition the board supports up to two mSATA devices (via dip-switch selection on Type 2 PCIe/104 stacks only), and all four sockets support USB, SMBus, and wireless mPCIe devices — including micro-SIM sockets, per socket, for cellular (WAN) use.

The carrier board is a great way to use ACCES’ full industrial line of mPCIe products. These include isolated DAQ, serial, analog, digital I/O (TTL, LVTTL, relay, FET) and quadrature cards.

Having four peripheral device sockets on one PCIe/104 stack-height card truly multiplies the flexibility of your embedded designs without compromising size or ruggedness.

Special Order

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

Accessories and Connections

Available accessories include our entire mPCIe product line as well as various mounting hardware.


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.

PC Interface

  • PC Interface: PCIe/104 Type 1 or Type 2
  • I/O Interface: PCI Express Mini Card Sockets (x4 or x2) (each with PCIe, USB, SMBus, Micro-SIM socket). mSATA (x2) on Type 2 PCIe/104 only


  • Temperature
    • Operating: -40°C to +85°C
    • Storage: -40°C to +85°C
  • Humidity: 5% to 95%, non-condensing
  • Power required: +5VDC @ 60mA typical (no load) (supplied by PCIe/104 stack)


  • Weight: 52.0 grams
  • Size: PCIe/104 Compliant
  • Length: 3.55″
  • Width: 3.775″

Regulatory Compliance

This product is designed to be in full compliance with CE requirements.

ModelDescriptionPrice (USD)

Four PCIe x1 lanes to 2 mPCIe sockets Carrier Board


Four PCIe x1 lanes to 4 mPCIe sockets Carrier Board

mPCIe-HDW-KIT2 2mm mounting hardware
mPCIe-HDW-PEM2 Two 2mm standoffs for mounting half-length mPCIe cards and two 2mm nylon screws.
One mPCIe-HDW-PEM2 kit needed per slot being converted to half-length.
Model Options (call for pricing)
-TOP board configured for use on the top of the PCIe/104 stack
-1B PCIe/104 “One Bank” Connector