VME Technology adheres to the open system architecture definition of real-time, modular embedded computing systems. Intensive development and field deployed systems have proven out the concept of VMEbus. The developers within the VMEbus community are committed to technology excellence through evolutionary changes.

VME Technology continues to be a favorable choice as an industrial embedded computing architecture. Many current users have taken advantage of the long life cycle of VME products and have refreshed their product lines with the vast selection of VME products on the market. New projects are leveraging the advancements in VME Technology with an eye on performance and the life cycle advantages of VME

VMEbus Applications

VMEbus is used in a wide variety of applications. In many cases, the VMEbus system design has been tailored to support specialized applications as well. Some of the most popular include:

  • Industrial controls: factory automation, robotics, injection molding machines, automotive body assembly and painting, sawmill controls, metal working, steel manufacturing, cardboard cutters and many others.
  • Military: battlefield command & control systems, ground and flight radar control systems, tank and gun controls, communications, avionics and many others.
  • Aerospace: avionics, fly-by-wire control systems, in-flight video servers, spacecraft experiment control, missile countdown sequencers, and many others. In 1998 the Mars Pathfinder used a VMEbus computer to control spacecraft operation on the planet Mars.
  • Transportation: railway controls, smart highway systems and light-rail transit systems.
  • Telecom: advanced intelligent node (AIN) switch gear, cellular telephone base stations, satellite uplink and downlinks and telephone switches. VMEbus live insertion capabilities were also designed for this application.
  • Simulation: aircraft flight, earthquake, metal fatigue and various military simulation systems.
  • Medical: CATSCAN imaging, MRI imaging and various acoustical systems.
  • High Energy Physics: particle accelerators, particle detectors.
  • General business: network routers, servers, copy machines and high-speed printers.


CompactPCI Overview

CompactPCI form-factor is the best solution for mission critical applications in various markets from aerospace to telecommunications. CPCI CPU boards’ functionality and reliability meet world standards and customers’ growing demands.


The demands on industrial PC technology require intelligent, cost-optimized products that are suitable for rugged environments and ensure longevity.


CompactPCI is available in both 3U and 6U form factors, this technology offers the latest and fastest processor technology for applications across all market spaces.


CompactPCI platforms are designed for modularity,  Hot Swap and provide densed computing performance.

CompactPCI System Provides:

  • Open and modular systems based on international standards
  • Commercial-off-the-shelf (COTS) hardware
  • low MTPF (Mean Time between Failures).
  • Support standard and real-time operating system.


CompactPCI Tech Features

CompactPCI solutions are suitable for high density integrated systems and highly available systems.

PEPARAB integrates all these characteristics into many CompactPCI products with the following features:

  • State of the Art CPU technology.
  • High-performance CPCI bus, DDR3 memory
  • 19″ mechanics in 3U, 6U configurations
  • Gigabit Ethernet controllers, hardware RAID, IO, fieldbuses
  • Support for Linux, Windows, VxWorks and others operating systems


Single Board Computers

Single Board Computers (SBCs) are standard, off-the-shelf computer boards that come in various industry conforming form factors. They can deliver customized features for the total solution when integrated with expansion boards ranging in type from PC/104, PC/104-plus and PCI-104 just to name a few.

Advantages of SBCs

SBCs are designed to work right out-of-the-box, thus optimizing development time so the final application can achieve an extremely quick time to market. SBCs are highly integrated with all key system interfaces and functionalities already designed in to the board. This means that only application-specific I/O needs to be integrated for the complete solution. This is made easy with standard accessories and contributes to the ultimate in fast system set-up – no specialized R&D knowledge and development time required. Just plug and go!

What is PC104?

PC104 is a popular standardized form-factor for small computing modules typically used in industrial control systems or vehicles.

PC104 gets its name from the popular desktop personal computers initially designed by IBM called the PC, and from the number of pins used to connect the cards together (104). PC104 cards are much smaller than ISA-bus cards found in PC’s and stack together which eliminates the need for a motherboard, backplane, and/or card cage. Power requirements and signal drive are reduced to meet the needs of an embedded system. Because PC104 is essentially a PC with a different form factor, most of the program development tools used for PC’s can be used for a PC104 system. This reduces the cost of purchasing new tools and also greatly reduces the learning curve for programmers and hardware designers.


PC104 based systems are used in a variety places including factories, laboratories, processing plants, vehicles, and almost anywhere devices must be controlled by a programmable computer. PC104 systems are small and ususally have low power requirements so they’re great for applications that simply don’t have the space for a full-blown desktop PC. Additionally, PC104 systems are designed to be more rugged than desktop systems. Building a system using PC104 modules usually costs more than a commercial PC, but usually less than a rack-mounted system.


Almost anything you can think of is availible as a PC104 module. This includes common functions like CPUs, Serial I/O ports, and Video Controllers; but also more exotic modules like GPS receivers, vehicle power supplies, wireless communications. A stack of PC104 modules can be attached as a component of a larger circuit board, or simply put in a small enclosure for stand-alone operation.


The PC104 form factor was developed by Ampro Computers in California in the late 1980’s. The specification was published in 1992 in order to enhance popularity. Now over 150 vendors manufacture PC104 compatible products including controller cards, software, and accessories.

Learn More
The PC104 Consortium was established to maintain the specifications, publish a resource guide, participate in standards activities, and to promote PC104 at trade shows and through news releases. We encourage you to contact them for additional information.

Additional technical details about PC104 can be found on The PC104 FAQ.