Method and apparatus for driving a load
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United States of America Patent
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Jan 8, 2013
Grant Date -
Sep 17, 2009
app pub date -
Mar 13, 2009
filing date -
Mar 14, 2008
priority date (Note) -
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Abstract
An output module for an Industrial Process Control System that drives a load in a failsafe manner. The output module drives a load in response to a driving signal and includes a controller that generates a command signal and a drive enable signal in response to said driving signal. A keep alive circuit generates an active keep alive signal unless the drive enable signal is inactive. The output module includes a driver circuit that generates a drive signal in accordance with the command signal when the keep alive signal is active such that the load can be driven with a channel failsafe switch in response to the drive signal. The output module can be integrated into any of a number of industrial process control systems to enhance the operability of such systems.
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