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Featured Products
Analog Digital I/O Serial Comm Wireless Systems
12-Bit Multifunction PC/104 I/O Board Isolated Input/Relay Output Card Digital I/O Module Isolated Input/Relay Output Board Low Profile Eight Port RS-485 Card w/Breakout Cable Eight Port PC/104 RS232/422/485 Board 16-Channel Wireless Isolated Input Relay Output Module NANO I/O Server CD
104-AIO12-8 PCI-IIRO-8 USB-DIO-32 USB-IIRO-16 LPCI-COM485/8 104-COM-8SM WM-IIRO-8 NANO


  • Attention all signal conditioner users! We've designed a more versatile, high-density signal conditioner, model LVDT-8U, available NOW!
  • ACCES is pleased to announce a new line of PC/104 digital quadrature encoder boards - the 104-QUAD Series. Choose from 4, 6 or 8 channels of quadrature encoder and channel index inputs. The boards are ideal for use in embedded motion control, instrumentation, and robotics applications. Pricing for the 4-channel version starts at only $195!
  • ACCES would like to thank everyone who visited us at the Embedded Systems Conference Boston 2008. It was great getting to put some faces to the names we work with every day.
  • ACCES has just released a new series of high-speed USB digital I/O modules - the Fast USB-DIO Series. These boards feature 16 high-speed buffered digital inputs or digital outputs at continuous, sustained streaming speeds up to 16 MB/s with 80MB/s bursts. Generate fast, unlimited waveform lengths for your application. If you require the need for high-speed parallel data transfer, this is the board you're looking for!
  • Just a reminder that for 20 years ACCES has documented the "register-level" interface to all of our products, and includes sample programs in register-level "C" for every card. Additionally, the full source code for virtually every piece of software or driver we have ever written is provided on our FREE Software Master CD or available simply by asking. ACCES also provides FREE samples for every product in as many as seven different programming languages, including DOS, Windows, and Linux favorites!
  • Need an easy to use utility board? Check out our new USB-IDIO-16 with 16 isolated digital inputs and 16 isolated solid-state relay outputs, capable of switching up to 2A each.
  • Our new line of USB analog input modules is NOW SHIPPING! The wait is over for those of you looking for a 12 or 16-bit, 16-channel, multifunction USB analog input board. With speeds up 500kHz, autocalbration, and real-time calibration, these boards also feature our popular USB/104 form factor. Prices start under $350, check them out here!
  • Great news for Windows Vista users! Many of our customers want to know if our USB products are compatible with the new Windows Vista operating system. The answer is YES, our USB/104 line of products have now been tested and validated to work with Vista.
  • Need analog outputs? How about eight-channels starting at $299.00? Our new line of USB analog output modules has just been released. Model USB-DA12-8E features eight 12-bit D/A converters, with 8 voltage ranges and simultaneous differential and single ended outputs. Model USB-DA12-8A features full Arbitrary Waveform Generator functionality up to 125 kHz simultaneously on all eight channels.
  • ACCES has just announced a new systems product at ESC Boston. The NANO I/O Server CD is the smallest, fanless Intel® Core™ Duo embedded system on the market with industrial PC/104-Plus I/O expansion. Call now to order!
  • A whitepaper detailing the ACCES approach to ETX modules is now available. Download the ETX Driving Embedded I/O whitepaper and contact us today to help develop your next ETX embedded project.
  • ACCES is pleased to release its newest series of PC/104 isolated digital I/O boards, the 104-IDI-48 Series. These 48-channel PC/104 utility boards feature 48 individually optically isolated digital inputs with change of state (COS) detection. The boards are ideal for use in monitoring and instrumentation applications where high common-mode external voltages are present.
  • Check out our innovative USB/104 multifunction I/O module - Model USB-IIRO4-2SM. This unit features four optically isolated digital inputs, four electromechanical relay outputs, and two RS-232/422/485 serial communication ports. Contact us today for a free 30-day evaluation!
  • Starting at just $159.00, our new line of low-cost PCI isolated digital I/O provides 16, 32, or 48 individual, optically isolated digital inputs or solid-state outputs. These cards are ideal for use in control and instrumentation applications where high-voltage protection is required.
  • Our new USB digital counter/timer module - model USB-CTR-15, is making waves with its 15 independent 16-bit counter/timers and flexible and easy configuration! Another winner in our line of "USB/104" products, check it out here!
  • The cut-off date for RoHS is right around the corner. The 2002/95/EC European Directive has a deadline of July 1, 2006. Click our RoHS logo for more information regarding our products and RoHS.
  • ACCES is excited to announce the release of its NANO I/O Server. Smallest embedded motherboard for industrial I/O using both ETX CPUs and PC/104 modules.
  • For those of you interested in wireless I/O, ACCES is pleased to offer our new Model WM-IIRO-8. This product provides 8 optically isolated inputs and 8 electromechanical relay outputs in a small NEMA4 industrial enclosure. The unit offers a low-cost alternative to costly signal wire installations in a wide variety of applications.
  • ACCES I/O Products is proud to introduce ETX semi-custom I/O baseboards. ACCES is the first exclusive embedded I/O company to offer this service. Currently, ETX baseboards and carriers are designed by ETX CPU board manufacturers, custom engineering firms or the customer's own engineering department. ETX CPU modules are a COTS product while the I/O baseboards and carriers have been fully custom. Click here to read about our semi-custom ETX I/O business solution. Perfect for OEM's looking for reduced cost solutions by the experts in data acquisition, control, and communications.
  • We've added two hot new products to our ever-expanding USB line! Model USB-IIRO-16 features 16 optically isolated digital inputs and 16 electromechanical relay outputs in a small (4"x4"x1.25") rugged enclosure. What makes this product unique is the capability for OEM's to integrate the unit into any PC/104-based system. Our USB-COM-4SM is a four-port USB to serial RS-232/422/485 adapter. It's now easier than ever to add serial ports and peripherals to any application with a USB port. Check them out now!
  • ACCES I/O Products is excited to offer our latest PC/104 board - Model 104-DA12-8. This board features 8 flexible analog outputs which provide arbitrary waveform generation capabilities for your PC/104 system. Other features include simultaneous voltage and 4-20mA current output capability. Useful for stimulus-response applications, test, simulation, and equipment control. Call today for a free 30-day evaluation!
  • ACCES is pleased to announce Model 104-II32-4RO. This is a 36-channel PC/104 utility board featuring 32 fully optically isolated digital inputs with change of state (COS) detection and four handy electromechanical relay outputs.
  • Now Shipping! Rugged, conduction cooled, PC/104 System - Model E4-DAS. An Easy to utilize, Ethernet enabled, Embedded and Environmentally adaptable PC/104 and PC/104-Plus based data acquisition system. E4-DAS is designed for applications requiring superior performance and protection from shock and vibration. Accepts from two to six boards (including CPU and power supply).
  • ACCES is proud to announce two new Universal PCI cards. Model LPCI-A16-16A is a Low Profile 500KHz 16-bit analog I/O card with 8 differential or 16 single-ended analog inputs, 16 digital I/O lines and two analog inputs. Model PCI-DIO-96C3 provides 96 buffered lines of high-current digital I/O with three independent, configurable counter timers.
  • ACCES now offers USB based data acquisition with Model USB-DIO-32. This rugged digital I/O and counter timer device provides 32 channels of high current I/O useful for PC based control and automation. The unit features Plug and Play USB installation for quick setup in mobile or stationary systems and an elegant, easy to use software package.
About ACCES I/O Products, Inc.

Founded in 1987 in San Diego, CA, ACCES (Acquisition Control Communication Engineering/Systems) supplies an extensive range of analog, digital, serial communication, and isolated I/O boards and solutions. ACCES also offers complete systems, integration services and enclosures with a quick turn around on custom projects, including software. ACCES products are designed for use with PC/104, PCI, PCI-X, Low Profile PCI, EBX, ETX, EPIC, USB, Ethernet, and ISA, as well as distributed and wireless I/O. All hardware comes with a 30-day, no-risk return policy and a three-year product warranty.

press releases
104-QUAD Family - New Line of 4, 6, or 8-channel PC/104 Digital Quadrature Encoder Input Boards for Motion Control Applications
USB-DIO-16H - New Series of Fast USB Digital Waveform (Pattern) Generator Modules (Four Models) for High-Speed Data Transfer
USB-IDIO-16 - USB Module with 16 Optically Isolated Digital Inputs and 16 Optically Isolated Solid State Relay Outputs
USB-AI16-16A Series - New Family of USB Analog Input Modules (Five Models) with Real-time Calibration
NANO I/O Server CD - Small, Fanless, Intel® Core™ Duo Embedded System with Industrial PC/104 I/O Expansion
USB-DA12-8A - USB Eight-Channel Analog Output Module with Arbitrary Waveform Generator
LVDT-8A - Multichannel LVDT Signal Conditioner Supports Position Measurement Applications
104-IDI-48 Series - New Series of Low-Cost PC/104 Digital Boards Provides 48 Isolated Digital Inputs
USB-IIRO4-2SM - USB Optically Isolated Digital I/O Module with Dual RS-232/422/485 Serial Communication Ports
PCI-IDI/IDO Series - Universal PCI Cards Provide 16, 32, or 48 Isolated Digital Inputs or Solid-State Outputs
USB-CTR-15 - USB Digital Module Provides Fifteen Independent Counter/Timers
ETX NANO I/O Server - Smallest Embedded Motherboard Using ETX CPUs, PC/104, and USB I/O Modules
WM-IIRO-8 - Wireless NEMA 16-Channel Optically Isolated Input / Relay Output Module and Wireless Serial Modem
USB-IIRO-16 - Compact USB 32-Channel Optically Isolated Input / Relay Output Module Ideal for High-Speed Digital Control
104-DA12-8A - Eight-Channel PC/104 Analog Output Board with Arbitrary Waveform Generator
104-II32-4RO - 36-Channel PC/104 Optically Isolated Input / Relay Output Module
USB-DIO-32 - High Speed USB.2.0 Module Provides 32 Lines of Optimized Digital I/O
LPCI-A16-16A - High-Speed (500 kHz) Universal PCI, 16-Bit Multifunction Analog I/O Board in a Low-Profile Form Factor
E4-DAS - Line of Rugged, Conduction Cooled, Integrated PC/104 Embedded Data Acquisition Systems
LPCI-COM-8SM - Eight-Port Universal PCI RS-232/422/485 Serial Communication Board in a Low-Profile Form Factor
IE-DAS - Line of Complete, Integrated PC/104 Intelligent Embedded Data Acquisition Systems
104-IDIO-16 - PC/104 Board with 16 Optically Isolated Digital Inputs and 16 Optically Isolated Solid State Outputs
104-COM-8SM - PC/104 High Speed Eight and Four Port RS-232/422/485 Serial Communication Boards
Universal PCI/PCI-X - Extensive PCI Line Now Provides Universal PCI and PCI-X Bus Compatibility
104-AIM-32 - Versatile PC/104 High-Density Analog Signal Conditioner Provides 32 Channels and up to 256 Inputs
104-COM-8S - PC/104 High-Speed Multi-Port RS-422/485 Serial Communication Boards
104-AIO16-16W - PC/104 High-Speed (500kHz), 16-Channel, 16-bit Multifunction Analog I/O Board
LPCI-COM422/8 and LPCI-COM485/8 - Low Profile, Universal PCI, 8-Port RS-485 or RS-422 Serial Communication Boards
RIO-24W - Wireless 24-Bit Discrete I/O Unit is Easy to Use, Offers Flexible Connectivity for Remote Data Acquisition
PCI-IDIO-16 - Change-of-State Detection PCI I/O Board Provides 16 Opto-Isolated Digital Inputs and 16 Solid State Outputs
104-ICOM-2S - PC/104 Dual Port, Optically Isolated, RS-422/485 Serial Communication Board
104-IIRO-16 - 32-Channel PC/104 Board Provides Change-of-State Detection, Optically Isolated Digital Inputs, Relay Outputs
104-IIRO-8 - 16-Channel PC/104 Board Provides Change-of-State Detection, Optically Isolated Digital Inputs, Relay Outputs
104-DIO-48S - 48 or 24 Lines of PC/104 Digital I/O with Change-of-State Detection
104-AIO12-8 - 12-Channel PC/104 Multifunction Analog I/O Board with Change-of-State Detection