Programmable Logic Controllers Visuel AutoProgrammable Logic Controllers (PLCs)

Programmable logic employs electronic processing units in order to process data. The operation of equipment constructed according to this technique is not defined by a circuit diagram, as for that used in hard wired logic, but by a program loaded into the memory of the processing unit. Programmable logic controllers are the basic components used in electronic automated systems and first appeared in the United States in 1969. They were designed at the demand of automobile manufacturers, who wished to have a flexible solution to their constantly evolving manufacturing methods, and this at a lower cost than the traditional hard wired logic.

Today, numerous models of programmable controller are available, from small PLCs suited to simple applications and installations with a few inputs/outputs, up to multifunction PLCs capable of controlling several thousands of inputs/outputs and designed to control complex processes.

Schneider Electric is one of the world's leading suppliers of Automation Controllers. From simple programmable relays through to powerful high availability hot standby systems, Schneider offers solutions capable of controlling simple machines through to complex process control applications across all industrial, infrastructure and building sectors.

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Schneider Electric Programmable Logic Controllers (PLCs)

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