XYCOM XVME-542 Switch input module

At this point in time when studies are underway to choose the technologies that will replace the old G-64 systems, it is useful to consider how this aging solution has survived so long. We can only hope that the new design will provide such good service and still be operating effectively in 2030! A first lesson is not to over-dimension the requirements; remain as simple as possible. We always tend to over-specify solutions and later must support all the hardware and software features that are never used. A modular approach is the key to flexibility that gives the freedom needed for the natural evolution of the original system in the face of component obsolescence. This is true whether the solution is based on a standard commercial bus or a custom backplane. We must resist the temptation to integrate more and more functionality into the same card to achieve spectacular but unnecessary performance. It is worth remembering the lessons given by the VME bus.

In the early days

 memory or peripherals could reside on VME boards separate from the CPU board with no impact on performance. As clock rates increased, external memory boards were less used in favour of memory directly on the CPU board. More recently, all but the slowest peripherals have moved to mezzanine modules on the CPU board. In many cases, the VME bus is reduced to a mechanical support and a power supply. At a certain point, it becomes time to think of a new bus technology or to question if the extra performance is really needed to solve the problem.

Long term control projects

 such as the power converter controls for the CERN PS complex are in a state of perpetual evolution. The set of elements chosen for the development environment, both hardware and software, have a substantial impact from a human resources perspective. Everything may be straight forward in the beginning, but as time passes and elements become obsolete the effort and skills needed to keep everything going can become a serious problem. It is worth remembering that it will take more effort to understand a poorly documented system in the future than it did to design it in the first place. So saving time now by not documenting will add to the cost of replacing or upgrading the system in the future.

Quality assurance service

1. We provide high-quality parts of various brands, and you will find full

The model meets your needs.

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4. All products can enjoy a one-year warranty service,

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