JPS6374096U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a first embodiment of this invention, FIG. 2 is a circuit diagram of a second embodiment of this invention, and FIG. 3 is a circuit diagram of an operating circuit device that is the basis of this invention.
4, 5 and 6 are timing diagrams of various parts of the circuit of FIG. 3, respectively. 1...On input circuit, 2...Off input circuit, 3
...On input holding circuit, 4...Output circuit, 5...
Output detection circuit, 6... Abnormality detection circuit, 7... Abnormal signal holding circuit, 8... Gate circuit, 10... Display circuit, 12... External operation input circuit, 13... Remote control circuit, MC... Electromagnetic Contactor coil, TH...
...Thermal relay contact, TM ₁ - TM ₄ ... Terminal, D ₁ - _{D 4} ... Diode, PH ₁ - PH ₄
... Relay device, R ₃ , R ₄ , R ₇ ... Resistor, S
W...Double push button switch, LED ₁ , LED ₂ ...
Unidirectional current-carrying type light emitting device.

Claims (1)

[Claims for Utility Model Registration] An on-input circuit that generates an on-signal in response to a switch operation; an off-input circuit that generates first and second off-signals in response to a switch operation; an on-input holding circuit that operates in response and recovers in response to the first off signal; and an output switching element connected to a power supply path from the AC power supply to the series circuit of the coil of the magnetic contactor and the contacts of the thermal relay. an output circuit that conducts the output switching element in response to the operating state output of the on-input holding circuit; and an output detection circuit that detects the current flowing from the AC power source to the series circuit of the coil of the magnetic contactor and the contact of the thermal relay. an abnormality detection circuit that generates an abnormality detection output in response to an AND of an operating state output of the on-input holding circuit and a current non-detection state output of the output detection circuit; and an abnormality detection output of the abnormality detection circuit. an abnormal signal holding circuit that operates and recovers with the second off signal; and an abnormal signal holding circuit that is interposed between the on input holding circuit and the output circuit and that outputs the on input in response to the operating state output of the abnormal signal holding circuit. a gate circuit that cuts off the supply of the operating state output from the holding circuit to the output circuit; and a gate circuit that becomes continuously lit when the operating state output of the on input holding circuit is generated and the recovery state output of the abnormal signal holding circuit is generated, and the turning on state is maintained. When the operating state output of the input holding circuit is generated, and when the abnormal signal holding circuit generates the operating state output, it becomes an intermittent lighting state, and when the on input holding circuit generates the recovery state output, and when the abnormal signal holding circuit generates the recovery state output, a display circuit that is turned off; first and second diodes whose cathodes and anodes are respectively connected to a first terminal connected to one end of an AC power source; and one end of an output element connected to the anode of the first diode. When the display circuit is connected and the display circuit is in a continuous lighting state, the input element operates continuously and the output element becomes continuously conductive, and when the display circuit is in the intermittent lighting state, the input element operates intermittently and the output element becomes intermittently conductive. a first relay device that is electrically conductive; and one end of an output element is connected to the cathode of the second diode, and when the on-input holding circuit is operated, the input element is continuously operated and the output element is continuously electrically conductive. a second relay device; a first resistor connected between the other end of the output element of the first relay device and the second terminal; and the other end of the output element of the second relay device. and the second terminal, and an input element is connected in parallel to the first resistor, and when the output element is conductive, the first off signal is generated from the off input circuit. an external operation input circuit comprising a third relay device and a fourth relay device having an input element connected in parallel to the second resistor and generating the on signal from the on input circuit when the output element is conductive; A third terminal having an anode and a cathode respectively connected to a third terminal connected to the other end of the AC power supply.
and a fourth diode, an off input terminal is connected to the cathode of the third diode, an on input terminal is connected to the anode of the fourth diode, and a common terminal is connected to the second terminal. a double-push button switch connected to a fourth terminal; a first one-way conduction type light emitting element having an anode connected to the third terminal; A second unidirectional energizing type light emitting element whose anode is connected to the cathode of the energizing type light emitting element, and a common connection between the cathode of the first unidirectional energizing type light emitting element and the anode of the second unidirectional energizing type light emitting element. and a third resistor connected between the fourth terminal and the fourth terminal.