Rockwell Automation Technologies Incorporated

David G Fullington

Michael Lee Gasperi

Raymond G Sladky

Daniel L Stewart

Scott P Miles

Alan J Campbell

A drive circuit for delivering high-level power to a load, and method of stopping a high power load from operating, are disclosed. The drive circuit includes a high power circuit capable of being coupled to the load and delivering the high level power thereto, and a to power circuit that controls the high power circuit. The low power circuit includes a first circuit portion that provides at least one control signal that is at least indirectly communicated to the high power circuit and that controls the delivering of the high level power by the high power circuit, and a second circuit portions coupled to the first circuit portion. The second circuit portion is capable of disabling the first circuit portion so that the at least one control signal avoids taking on values that would result in the high power circuit delivering the high level power to the load.

Apparatus and method for disabling the operation of high power devices

A drive circuit for delivering high-level power to a load, and method of stopping a high power load from operating, are disclosed. The drive circuit includes a high power circuit capable of being coupled to the load and delivering the high level power thereto, and a low power circuit that controls the high power circuit. The low power circuit includes a first circuit portion that provides at least one control signal that is at least indirectly communicated to the high power circuit and that controls the delivering of the high level power by the high power circuit, and a second circuit portions coupled to the first circuit portion. The second circuit portion is capable of disabling the first circuit portion so that the at least one control signal avoids taking on values that would result in the high power circuit delivering the high level power to the load.

A drive for delivering a high-power signal to a load includes a power circuit and a drive circuit. The power circuit is operable to provide a high power signal to the load in response to a control signal. The control circuit is operable to generate the control signal for activating the power circuit. The control circuit includes an application processor and a safety circuit. The application processor is operable to generate the control signal during a normal mode of operation. The safety circuit is operable to inhibit the generation of the control signal during a safe-off mode of operation. The safety circuit includes a safety processor independent from the application processor and operable to monitor the safety circuit.

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Milwaukee, WI, United States of America

David G Fullington