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What is the oldest PLC system in the world?

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تم إضافة السؤال من قبل Mohammed Abdul Aziz , Lighting Application Specialist , Al tayer engineering LLC
تاريخ النشر: 2015/03/06
Julian Kristofer Vasquez
من قبل Julian Kristofer Vasquez , Technical Support Engineer , CEPALCO Energy Services Corporation

In control engineering, the Oldest PLC system concept is consist of a switch (or a relay) that is when inputted logically with Signal (Voltage) will magnetize its coil and in turn actuating the metal conductor to create a current path on its output legs. And a ready source (usually AC and/or DC voltages) to be used to supply the Load, if logic will allow current path thru relay.

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