Input or output device, for programmable automatic controllers to detect an electrical fault of the channels
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United States of America Patent
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Dec 10, 1996
Grant Date -
N/A
app pub date -
Sep 3, 1992
filing date -
Sep 5, 1991
priority date (Note) -
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Abstract
A device is adapted to be associated with a group of input or output channels, especially of a programmable automatic controller, to detect if the channels are subject to an open circuit and/or an overcurrent. To each channel are assigned two analog comparators connected to a processor logic circuit which connects one or the other comparator output to a control unit. Configurator logic activates or deactivates one or the other of the comparators and associated forcing devices and filters according to the operating mode selected.
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