Annunciator control circuit
First Claim
1. An annunciator control circuit adaptable for responding to a plurality of types of fault indicative inputs, comprising:
- a signal conditioning circuit portion including an input line and an output line, the signal conditioning circuit portion including switch means adjustable for selectively configuring the signal conditioning circuit portion to receive each of the plurality of types of fault indicative inputs at the input line thereof and to provide a conditioned fault indicative output signal in response thereto at the output line thereof;
a first latching circuit portion connected to the output line of the signal conditioning circuit portion and having a first output line;
a first switching transistor including a base, collector, and emitter, the base connected to the first output line of the first latching circuit portion;
wherein, in response to receipt of the conditioned fault indicative output signal from the signal conditioning circuit portion, an output at the first output line of the first latching circuit portion latches the first switching transistor in an ON state;
a second latching circuit portion connected to the output line of the signal conditioning circuit portion and having an output line;
a second switching transistor including a base, collector and emitter, the base connected to the output line of the second latching circuit portion;
wherein, in response to receipt of the conditioned fault indicative input signal from the signal conditioning circuit portion, an output at the output line of the second latching circuit portion latches the second transistor in an ON state;
wherein the first latching circuit portion includes a second output line, the annunciator control circuit further comprising;
a third switching transistor including a base, collector and emitter, the base connected to the second output line of the first latching circuit portion, wherein, in response to receipt of the conditioned fault indicative output signal from the signal conditioning circuit portion, an output at the second output line of the first latching circuit portion latches the third transistor in an OFF state; and
a fourth switching transistor including a base, collector and emitter, the base connected to the output line of the second latching circuit portion, the third and fourth transistors connected in series, wherein, in response to receipt of the conditioned fault indicative output signal from the signal conditioning circuit portion, the output at the output line of the second latching circuit portion latches the fourth transistor in an ON state.
1 Assignment
0 Petitions
Accused Products
Abstract
An annunciator control circuit adaptable for responding to a plurality of types of fault indicative inputs is provided. The control circuit includes a signal conditioning circuit portion having an input line and an output line. The signal conditioning circuit also includes switch means adjustable for selectively configuring the signal conditioning circuit portion to receive each of the plurality of types of fault indicative inputs at the input line thereof and to provide a conditioned fault indicative output signal in response thereto at the output line. The control circuit further includes a first latching circuit portion connected to the output line of the signal conditioning circuit portion and having a first output line. A first switching transistor of the control circuit includes a base, collector, and emitter, the base connected to the first output line of the first latching circuit portion. In response to receipt of the conditioned fault indicative output signal from the signal conditioning circuit portion, an output at the first output line of the first latching circuit portion latches the first switching transistor in an ON state. When the first switching transistor is connected to an operator output device such as a lamp or horn, the annunciator control circuit can be utilized to convey to an operator the occurrence of some type of fault in a system being monitored.
35 Citations
13 Claims
-
1. An annunciator control circuit adaptable for responding to a plurality of types of fault indicative inputs, comprising:
-
a signal conditioning circuit portion including an input line and an output line, the signal conditioning circuit portion including switch means adjustable for selectively configuring the signal conditioning circuit portion to receive each of the plurality of types of fault indicative inputs at the input line thereof and to provide a conditioned fault indicative output signal in response thereto at the output line thereof; a first latching circuit portion connected to the output line of the signal conditioning circuit portion and having a first output line; a first switching transistor including a base, collector, and emitter, the base connected to the first output line of the first latching circuit portion; wherein, in response to receipt of the conditioned fault indicative output signal from the signal conditioning circuit portion, an output at the first output line of the first latching circuit portion latches the first switching transistor in an ON state; a second latching circuit portion connected to the output line of the signal conditioning circuit portion and having an output line; a second switching transistor including a base, collector and emitter, the base connected to the output line of the second latching circuit portion; wherein, in response to receipt of the conditioned fault indicative input signal from the signal conditioning circuit portion, an output at the output line of the second latching circuit portion latches the second transistor in an ON state; wherein the first latching circuit portion includes a second output line, the annunciator control circuit further comprising; a third switching transistor including a base, collector and emitter, the base connected to the second output line of the first latching circuit portion, wherein, in response to receipt of the conditioned fault indicative output signal from the signal conditioning circuit portion, an output at the second output line of the first latching circuit portion latches the third transistor in an OFF state; and a fourth switching transistor including a base, collector and emitter, the base connected to the output line of the second latching circuit portion, the third and fourth transistors connected in series, wherein, in response to receipt of the conditioned fault indicative output signal from the signal conditioning circuit portion, the output at the output line of the second latching circuit portion latches the fourth transistor in an ON state. - View Dependent Claims (2, 3)
-
-
4. An annunciator control circuit adaptable for responding to a plurality of types of fault indicative inputs, comprising:
-
signal conditioning circuit portion including an input line and an output line, the signal conditioning circuit portion including switch means adjustable for selectively configuring the signal conditioning circuit portion to receive each of the plurality of types of fault indicative inputs at the input line thereof and to provide a conditioned fault indicative output signal in response thereto at the output line thereof; a first latching circuit portion connected to the output line of the signal conditioning circuit portion and having a first output line; a first switching transistor including a base, collector, and emitter, the base connected to the first output line of the first latching circuit portion; wherein, in response to receipt of the conditioned fault indicative output signal from the signal conditioning circuit portion, an output at the first output line of the first latching circuit portion latches the first switching transistor in an ON state; an electrical energy source; a relay including a control portion and a normally open contact portion, the control portion connected to the collector of the first switching transistor; and an operator output device connected in series with the relay contact portion to the electrical energy source.
-
-
5. An annunciator control circuit adaptable for responding to a plurality of types of fault indicative inputs, comprising:
-
signal conditioning circuit portion including an input line and an output line, the signal conditioning circuit portion including switch means adjustable for selectively configuring the signal conditioning circuit portion to receive each of the plurality of types of fault indicative inputs at the input line thereof and to provide a conditioned fault indicative output signal in response thereto at the output line thereof; a first latching circuit portion connected to the output line of the signal conditioning circuit portion and having a first output line; a first switching transistor including a base, collector, and emitter, the base connected to the first output line of the first latching circuit portion; wherein, in response to receipt of the conditioned fault indicative output signal from the signal conditioning circuit portion, an output at the first output line of the first latching circuit portion latches the first switching transistor in an ON state; an electrical energy source; and an operator output device connected between the electrical energy source and the collector of the first switching transistor.
-
-
6. An annunciator control circuit, comprising:
a signal conditioning circuit adaptable for receiving a plurality of types of fault indicative signals, the circuit including an input line, an output line, voltage regulator means, an inverter, and a plurality of position selectable switches, the input line connected to an input of the voltage regulator means, an output of the voltage regulator means connected to an input of the inverter, a first switch connected between the input of the inverter and ground, a second switch connected between the input of the voltage regulator and the input of the inverter, a third switch connected between the input of the inverter and the output line, and a fourth switch connected between the output of the inverter and the output line. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
Specification