Voltage monitoring and on-off monitoring circuit
The invention belongs to the field of circuits, and particularly discloses a voltage monitoring and on-off monitoring circuit, which comprises an input voltage monitoring circuit, a contact on-off monitoring circuit and an isolation acquisition circuit, and is characterized in that the isolation acq...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention belongs to the field of circuits, and particularly discloses a voltage monitoring and on-off monitoring circuit, which comprises an input voltage monitoring circuit, a contact on-off monitoring circuit and an isolation acquisition circuit, and is characterized in that the isolation acquisition circuit comprises a dual-channel photoelectric coupler working independently; the contact on-off monitoring circuit comprises a diode, a capacitor and a resistor which are connected in parallel, a pin 4 of the photoelectric coupler is connected to an input voltage positive end through a series current-limiting resistor, and a pin 3 of the photoelectric coupler is connected to an input voltage negative end; the input voltage monitoring circuit comprises a voltage comparator, a pin 1 of the photoelectric coupler is connected in series with a current-limiting resistor and is connected to an external input voltage positive end, and a pin 2 of the photoelectric coupler is connected with the voltage comparator a |
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