Method and apparatus for protecting against reverse current flow
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United States of America Patent
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Jun 12, 2012
Grant Date -
Aug 6, 2009
app pub date -
Jan 27, 2009
filing date -
Feb 4, 2008
priority date (Note) -
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Abstract
A system for protecting against reverse current flow in an output module of an Industrial Process Control System includes a transistor that is driven by a control signal and a current monitor arranged to monitor a current through the transistor. The system includes a processor that is arranged to receive the monitored current and to generate the control signal in dependence upon the monitored current. The processor is configured to turn off the transistor if a reverse current is detected in the transistor. Extension of the system provides a power feed combiner that is protected against reverse current flow.
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