A kind of electric switch control circuit
Technical field
The utility model relates to equipment electric switch control circuit, is mainly used in the connection power supply of realization equipment, the self-insurance that powers on, the autonomous control function of cutting off the power supply.
Background technology
At present, the function that powers on/off that electric operation all needs manual operation switch realization self is changeed in powering on of most of opertaing devices, and a lot of equipment do not possess self and cut off the function of self powering.It is very dangerous to carry out manual power operation for the opertaing device of some high-voltage large current, and some equipment might can't be realized manual operation.
Summary of the invention
The purpose of this utility model is: overcome the deficiency that prior art exists, a kind of electric switch control circuit is provided, by this control circuit, when connecting the commentaries on classics electric control signal, can realize easily that control circuit changes the electricity operation, connect external power source and input to first power input, for single-chip microcomputer and opertaing device itself provide power supply; Self-insurance outage control end is put low level 0V, and when changeing electric control instruction existence or cancellation, itself can realize the self-insurance of powering the control circuit power supply; When self-insurance outage control end is put high level 5V, realize self cutting off the electricity supply by the instruction of single-chip microcomputer IO output high level.
For solving the problems of the technologies described above, the utility model provides a kind of electric switch control circuit, comprises relay circuit and single chip circuit, it is characterized in that, also comprises first power supply, second source,
Described relay circuit comprises first relay, second relay, the 3rd relay, first diode, second diode, the 3rd diode, the 4th diode and the 5th diode,
First relay and second relay have two groups of contacts, the 3rd relay has one group of contact, first relay, second relay, two groups of contact common ports separately link to each other, first relay, second relay, two groups of normally opened contacts separately link to each other, the public termination external power source of first relay, after two groups of normally opened contacts of first relay connect, the two groups of common ports that linked to each other with second relay again and the common port of the 3rd relay are connected respectively, after two groups of normally opened contacts of second relay link to each other, the control end that connects the 3rd relay again connects, the first control termination second source of second relay, single-chip microcomputer in the second control end order sheet machine circuit of second relay, the power supply ground of the second control termination, first power input of second control end of first relay and second relay, the power supply changeover device of the normally closed contact order sheet machine circuit of the 3rd relay;
The positive pole of first diode connects the normally closed contact of the 3rd relay, and the negative pole of first diode connects first control end of first relay; The positive pole of second diode connects second control end of first relay, and the negative pole of second diode connects first control end of first relay; The positive pole of the 3rd diode connects the outside electric control signal that changes, and the negative pole of the 3rd diode connects first control end of first relay; The positive pole of the 4th diode connects second control end of the 3rd relay, and the negative pole of the 4th diode connects first control end of the 3rd relay; The positive pole of the 5th diode connects the normally opened contact of the 3rd relay, and the negative pole of the 5th diode connects first control end of the 3rd relay;
Described single chip circuit comprises power supply changeover device and single-chip microcomputer, and it is described single-chip microcomputer power supply that the power supply converter of described single chip circuit is imported the described first power input changing voltage with power supply.
The beneficial effects of the utility model are:
The utility model provide a kind of and realize powering, the electric switch control circuit of self-insurance, power down function, this circuit can be realized the power supply conversion of opertaing device, the self-insurance that powers on, autonomous power down function.
2. the utility model can realize easily that control circuit changes the electricity operation when connect changeing electric control signal, and energized inputs to first power input, for single-chip microcomputer and opertaing device itself provide power supply; Self-insurance outage control end is put low level 0V, when changeing electric control instruction existence or cancellation, control circuit power supply itself is by first relay, second relay, the 3rd relay, and first diode, second diode, the 3rd diode, the 4th diode and the 5th diode can be realized the self-insurance of powering; When self-insurance outage control end, when promptly second control end of second relay is put high level 5V, realize self cutting off the electricity supply by the instruction of single-chip microcomputer IO output high level.
3. the utility model adopts relay control to change electricity, self-insurance and power down function, can utilize small-signal to control the operation of big electric current high-voltage power supply to autonomous cut-offing instruction control, thereby allow operating personnel away from opertaing device, and can realize the autonomous outage of opertaing device, improve processing safety and work efficiency.
The utility model provides a kind of and has collected power supply, self-insurance, outage and be controlled in electric switch control circuit all over the body, can realize the power supply conversion of opertaing device, self-insurance powers on, autonomous power down function, its low cost of manufacture, be easy to set up, can improve processing safety and work efficiency, the reliability height, result of use is good.
Description of drawings
Below in conjunction with the drawings and specific embodiments the technical solution of the utility model is further described in detail.
Fig. 1 is a circuit diagram of the present utility model.
Embodiment
The disclosed electric switch control circuit of the utility model comprises relay circuit, single chip circuit, first power supply, second source.Each building block and connected mode thereof to this control circuit is elaborated below:
Shown in the circuit diagram of the present utility model as shown in Figure 1, relay circuit comprises first relay K 1, second relay K 2, the 3rd relay K 3, the first diode V1, the second diode V2, the 3rd diode V3, the 4th diode V4 and the 5th diode V5.
First relay K 1 and second relay K 2 have two groups of contacts, and the 3rd relay K 3 has one group of contact.
Two groups of contact common ports of first relay K 1 link to each other, two groups of normally opened contacts of first relay K 1 link to each other, the public termination external power source PWRin of first relay K 1, after two groups of normally opened contacts of first relay K 1 connect, be connected respectively with the two groups of common ports of second relay K 2 and the common port of the 3rd relay again;
Two groups of contact common ports of second relay K 2 link to each other, two groups of normally opened contacts of second relay K 2 link to each other, after two groups of normally opened contacts of second relay K 2 link to each other, the control end that connects the 3rd relay K 3 again connects, the first control termination second source of second relay K 2,5V in promptly illustrating, the input/output port of single-chip microcomputer in the second control end order sheet machine circuit of second relay K 2
Second control end of first relay K 1 is connected the power supply ground of first power input with second control end of second relay K 2, i.e. 28VGND shown in the figure, the power supply changeover device of the normally closed contact order sheet machine circuit of the 3rd relay K 3.
The positive pole of the first diode V1 connects the normally closed contact of the 3rd relay K 3, and the negative pole of the first diode V1 connects first control end of first relay K 1; The positive pole of the second diode V2 connects second control end of first relay K 1, and the negative pole of the second diode V2 connects first control end of first relay K 1; The positive pole of the 3rd diode V3 connects the outside electric control signal that changes, i.e. ZDKZ signal shown in the figure, and the negative pole of the 3rd diode V3 connects first control end of first relay K 1; The positive pole of the 4th diode V4 connects second control end of the 3rd relay K 3, and the negative pole of the 4th diode V4 connects first control end of the 3rd relay K 3; The positive pole of the 5th diode V5 connects the normally opened contact of the 3rd relay K 3, and the negative pole of the 5th diode V5 connects first control end of the 3rd relay K 3.
Single chip circuit comprises power supply changeover device and single-chip microcomputer, and the power supply converter of single chip circuit is imported first power input with power supply, i.e. 28Vin shown in the figure, changing voltage are the single-chip microcomputer power supply.
Principle of work of the present utility model is: when connect changeing electric control signal, this control circuit realizes changeing the electricity operation, connects external power source, and promptly the PWRin shown in the figure inputs to first power input, for single-chip microcomputer and opertaing device itself provide power supply; Self-insurance outage control end, promptly second control end of second relay is put low level 0V, when changeing electric control instruction existence or cancellation, the control circuit power supply, be that external power source PWRin itself passes through first relay K 1, second relay K 2, the 3rd relay K 3, and the first diode V1, the second diode V2, the 3rd diode V3, the 4th diode V4 and the 5th diode V5 realize the power supply self-insurance; When self-insurance outage control end, when promptly second control end of second relay K 2 is put high level 5V, realize self cutting off the electricity supply by the instruction of single-chip microcomputer IO output high level.
It should be noted last that, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to example, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.