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Factory automation is the use of control systems (such as numerical control, programmable logic control, and other industrial control systems), in concert with other applications of information technology (such as computer-aided technologies [CAD, CAM, CAx]), to control industrial machinery and processes, reducing the need for human intervention. Optocouplers are used in numerous areas of factory automation. Transistor output couplers can be used to isolate both the input and output of a programmable logic control unit. High speed optocouplers can be used to isolate control circuits from device circuits or to establish a communication link between different functions of a network. MOSFET / IGBT and IPM couplers are used to isolate the control circuit from the high-power motor circuit. Isolation amplifiers are used in the feedback loop of a motor to the control circuit.
PTM Published on: 2009-02-26