System and method for verifying operational integrity of a control head monitor
AssigneeCarrier Corporation
InventorThomas Kjellman
Life of this patent
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Abstract
A control head monitor including a single pole double throw (SPDT) switch, is disclosed. The SPDT switch includes a first terminal, a second terminal, a third terminal, and a switching element. The load element is connected between an input line and the second terminal. The input line of a detection circuit is connected to the first terminal and an output line of the detection circuit is connected to the third terminal. The switching element is adapted to connect the first terminal and the third terminal during an OFF mode. The switching element is adapted to connect the second terminal and the third terminal, to generate at least one of an output signal and an absence of an output signal.
Claims15
A control head monitor comprising:
- a single pole double throw switch (SPDT) having:
- a first terminal;
- a second terminal;
- a third terminal;
- and
- a switching element;
- a load element connected between an input line and the second terminal;
- and
- the input line of a detection circuit connected to the first terminal and an output line of the detection circuit connected to the third terminal,
- wherein the switching element is adapted:
- during an OFF mode, to connect the first terminal and the third terminal, and
- during an ON mode, to connect the second terminal and the third terminal, to generate at least one of an output signal and an absence of an output signal.
A system for verifying operational integrity of a control head monitor, the system comprising:
- the control head monitor comprising:
- a single pole double throw switch (SPDT) having:
- a first terminal;
- a second terminal;
- a third terminal;
- and
- a switching element;
- a load element connected between an input line and the second terminal;
- and
- the input line of a detection circuit connected to the first terminal and an output line of the detection circuit connected to the third terminal,
- wherein the switching element is adapted:
- during an OFF mode, to connect the first terminal and the third terminal, and
- during an ON mode, to connect the second terminal and the third terminal, to generate at least one of an output signal and an absence of an output signal;
- and
- the detection circuit comprising at least one controller coupled to the input line and the output line, the at least one controller adapted to:
- receive at least one of the generated output signal and the absence of the output signal during the OFF mode and the ON mode of the control head monitor;
- and
- verify the operational integrity of the control head monitor based on the received at least one of the output signal and the absence of the output signal during the OFF mode and the ON mode of the control head monitor.
A method for verifying operational integrity of a control head monitor, the method comprising:
- providing the control head monitor comprising:
- a single pole double throw switch (SPDT) having:
- a first terminal;
- a second terminal;
- a third terminal;
- and
- a switching element;
- a load element connected between an input line and the second terminal;
- and
- the input line of a detection circuit connected to the first terminal and an output line of the detection circuit connected to the third terminal,
- wherein the switching element is adapted:
- during an OFF mode, to connect the first terminal and the third terminal, and
- during an ON mode, to connect the second terminal and the third terminal, to generate at least one of an output signal and an absence of an output signal;
- receiving, via at least one controller of a detection circuit, at least one of the generated output signal and the absence of the output signal during the OFF mode and the ON mode of the control head monitor;
- and
- verifying, via the at least one controller, the operational integrity of the control head monitor based on the received at least one of the output signal and the absence of the output signal during the OFF mode and the ON mode of the control head monitor.
Dependencies are inferred from the claim text.