System and method of assuring drop out of a solenoid valve
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United States of America Patent
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Jan 6, 2015
Issued Date -
N/A
app pub date -
Aug 1, 2011
filing date -
Aug 1, 2011
priority date (Note) -
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Abstract
A method of assuring drop out of a valve assembly comprising detecting a level of a signal from the controller; diverting the signal to a solenoid coil of the valve assembly when the level of the signal is above a predetermined value; and diverting the signal to a load when the level of the signal is below the predetermined value. The level detector may divert the signal away from the coil when the level of the signal is below the predetermined value, thereby ensuring that the coil is fully de-energized in response to the level of the signal being below the predetermined value, while allowing current to flow through the valve assembly, thereby allowing the controller to monitor the integrity of the wiring between the controller and the valve assembly.
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