CN208999815U - Conversion circuit, pinboard and control system - Google Patents
Conversion circuit, pinboard and control system Download PDFInfo
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- CN208999815U CN208999815U CN201821763922.8U CN201821763922U CN208999815U CN 208999815 U CN208999815 U CN 208999815U CN 201821763922 U CN201821763922 U CN 201821763922U CN 208999815 U CN208999815 U CN 208999815U
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Abstract
This application discloses a kind of conversion circuit, pinboard and control system, which includes forward circuit, and the input terminal of forward circuit is for receiving the first signal；Negater circuit, the input terminal of negater circuit is for receiving second signal；Isolation circuit is coupled with forward circuit and negater circuit, and for the first signal or second signal to be converted to third signal, the output end and control system of isolation circuit are coupled, and control system receives third signal from isolation circuit.By the above-mentioned means, the application is not necessarily to extra soldered electronic component, it is easy to on-site maintenance and debugging.
Description
Technical field
This application involves the technical field of Industry Control, it is related to a kind of conversion circuit, pinboard and control system.
Background technique
Control system is needed from load-receipt to multiple feedback signal at present, and the level of feedback signal is 24V, control
The permitted level of system is less than 24V, therefore control system needs to receive feedback signal by pinboard, and feedback signal can wrap
Include NPN type signal and positive-negative-positive signal.
Present inventor has found that the pinboard of the prior art uses single-ended optocoupler, example in long-term R&D process
Such as pinboard supports input NPN type signal；When replacement inputs positive-negative-positive signal, need to weld electronic component, inconvenience is on site
Maintenance and debugging.
Utility model content
In order to solve the above problem existing for the pinboard of the prior art, the application provides a kind of conversion circuit, pinboard
And control system.
To solve the above problems, the embodiment of the present application provides a kind of conversion circuit, it is applied to control system, described turn
Circuit is changed to include at least:
Forward circuit, the input terminal of the forward circuit is for receiving the first signal；
Negater circuit, the input terminal of the negater circuit is for receiving second signal；
Isolation circuit is coupled with the forward circuit and the negater circuit, for by first signal or described
Second signal is converted to third signal, and the output end of the isolation circuit and the control system couple, the control system from
The isolation circuit receives the third signal.
A kind of control system is provided in order to solve the above technical problems, originally returning comprising conversion circuit, the control system
The first signal is obtained from load by the conversion circuit or second signal, the conversion circuit include at least:
Forward circuit, the input terminal of the forward circuit is for receiving first signal；
Negater circuit, the input terminal of the negater circuit is for receiving the second signal；
Isolation circuit is coupled with the forward circuit and the negater circuit, for by first signal or described
Second signal is converted to third signal, and the output end of the isolation circuit and the control system couple, the control system from
The isolation circuit receives the third signal.
A kind of pinboard is provided in order to solve the above technical problems, originally returning, is provided with above-mentioned conversion circuit.
Compared with prior art, the conversion circuit of the application includes forward circuit, and the input terminal of forward circuit is for receiving
First signal；Negater circuit, the input terminal of negater circuit is for receiving second signal；Isolation circuit, with forward circuit and reversely
Circuit coupling, for the first signal or second signal to be converted to third signal, the output end and control system of isolation circuit
Coupling, control system receive third signal from isolation circuit；The conversion circuit can be received by negater circuit and forward circuit
Third signal is converted to the first signal and the second signal, and by the first signal or second signal, is not necessarily to extra soldered electronics
Element is easy to on-site maintenance and debugging.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the application
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the schematic illustration of the conversion circuit of the application first embodiment；
Fig. 2 is the block schematic illustration that conversion circuit is applied to control system in Fig. 1；
Fig. 3 is the circuit diagram of conversion circuit in Fig. 1；
Fig. 4 is the circuit diagram of the conversion circuit of the application second embodiment；
Fig. 5 is the circuit diagram of the conversion circuit of the application 3rd embodiment；
Fig. 6 is the schematic diagram of the change-over panel of the application first embodiment；
Fig. 7 is the schematic diagram of the control system of the application first embodiment.
Specific embodiment
With reference to the accompanying drawings and examples, the application is described in further detail.It is emphasized that following implement
Example is merely to illustrate the application, but is not defined to scope of the present application.Likewise, following embodiment is only the portion of the application
Point embodiment and not all embodiments, institute obtained by those of ordinary skill in the art without making creative efforts
There are other embodiments, shall fall in the protection scope of this application.
The orientation of instructions such as term "inner", "outside" in the description and claims of this application and above-mentioned attached drawing or
Positional relationship be orientation based on the figure or positional relationship or this application product using when the orientation usually put
Or positional relationship, description the application merely for convenience, which closes, simplifies description, rather than indicate or imply signified device or
Person's element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, the description and claims of this application and term " first ", " second ", " third " in above-mentioned attached drawing
(if present)s such as " the 4 " are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It answers
The data that the understanding uses in this way are interchangeable under appropriate circumstances, so that embodiments herein described herein for example can
Implemented with the sequence other than those of illustrating or describing herein.In addition, term " includes " and " having " and they
Any deformation, it is intended that cover it is non-exclusive include, for example, containing the process, method of a series of steps or units, being
System, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include be not clearly listed or
For the intrinsic other step or units of these process, methods, product or equipment.
Referring to Figure 1 shown in -2, Fig. 1 is the schematic illustration of the conversion circuit of the application first embodiment；Fig. 2 is Fig. 1
Middle conversion circuit is applied to the block schematic illustration of control system.The revealed conversion circuit 10 of the present embodiment is applied to Industry Control
Control system 20, control system 20 from load 21 receives feedback signal by conversion circuit 10.
Wherein, control system 20 may include PLC (programmable logic controller (PLC), Programmable Logic
) or CNC (computer numerical control technology, omputerized Numerical Control) Controller.PLC be applied to
A kind of electronic device of industrial digital operation, it is mechanical by number or analog input or output control.
The processing program that CNC is pre-set according to user processes part to be processed automatically.
The conversion circuit 10 includes forward circuit 11, negater circuit 12 and isolation circuit 13；The input terminal of forward circuit 11
For receiving the first signal, for the input terminal of negater circuit 12 for receiving second signal, feedback signal may include the first signal
And second signal.Isolation circuit 13 is coupled with forward circuit 11 and negater circuit 12 respectively, obtains the first letter from forward circuit 11
Number perhaps second signal is obtained for the first signal or second signal to be converted to third signal from negater circuit 12, so that
The level for obtaining the third signal that control system 20 receives meets the requirement of control system 20.Wherein, the level of the first signal and
The level of second signal is 24V, and the level of third signal is less than 24V.
The conversion circuit 10 of the present embodiment receives the first signal by forward circuit 11 or is received by negater circuit 12
Third signal is converted to second signal, and by the first signal or second signal, so that the third that control system 20 receives
The level of signal meets the requirement of control system 20, is not necessarily to extra soldered electronic component, is easy to on-site maintenance and debugging.
Shown in Figure 3, Fig. 3 is the circuit diagram of conversion circuit in Fig. 1.Wherein, the input terminal of forward circuit 11
It can be NPN type input terminal, the input terminal of negater circuit 12 can be positive-negative-positive input terminal.It is effective in the input of NPN type input terminal
When, the first signal is low level；When the input of NPN type input terminal is invalid, the first signal is high level.It is defeated in positive-negative-positive input terminal
When entering effective, second signal is high level；When the input of positive-negative-positive input terminal is invalid, second signal is low level.
Wherein, forward circuit 11 includes at least first resistor R1, and one end of first resistor R1 is for receiving the first signal, i.e.,
One end of first resistor R1 is the input terminal of forward circuit 11；The other end of first resistor R1 is connect with isolation circuit 13.
Wherein, negater circuit 12 include at least second resistance R2,3rd resistor R3 and switching tube Q, the one of second resistance R2
End is for receiving second signal, i.e. one end of second resistance R2 input terminal for being negater circuit 12.The other end of second resistance R2
The first end of connection switch pipe Q, the first end of one end connection switch pipe Q of 3rd resistor R3, another termination of 3rd resistor R3
Ground.The second end of switching tube Q is connect with one end of first resistor R1, i.e. the input of the second end of switching tube Q and forward circuit 11
End connection；The third end of switching tube Q is connect with the other end of 3rd resistor R3.
Isolation circuit 13 includes optical coupling isolator 131 and the 4th resistance R4, and the first input end of optical coupling isolator 131 inputs
The second end of first reference voltage V1, optical coupling isolator 131 are connect with the other end of first resistor R1, optical coupling isolator 131
Third end is connect with one end of the 4th resistance R4, and the other end of the 4th resistance R4 inputs the second reference voltage V2, optical coupling isolator
131 the 4th end ground connection, the third end of optical coupling isolator 131 are the output end of isolation circuit 13.
Wherein, optical coupling isolator 131 includes photophore D1 and light-receiving device D2, and the anode input first of photophore D1 is with reference to electricity
V1 is pressed, the cathode of photophore D1 connects first resistor R1, and one end of light-receiving device D2 connects the 4th resistance R4, and light-receiving device D2's is another
End ground connection.
Wherein, the first reference voltage V1 can be 24V, and the second reference voltage V2 can be 3.3V.
The following specifically describes the concrete operating principles of the conversion circuit.
Receiving the first signal in the input terminal of forward circuit 11 is low level, i.e., when the input of NPN type input terminal is effective, hair
The electric current of light device D1 is greater than the rated current that photophore D1 shines, and photophore D1 shines, light-receiving device D2 conducting；Light-coupled isolation at this time
Device 131 is connected, and the output end of isolation circuit 13 exports low level, and third signal is low level.
Receiving the first signal in the input terminal of forward circuit 11 is high level, i.e., when the input of NPN type input terminal is invalid, hair
The electric current of light device D1 is less than the rated current that photophore D1 shines, and photophore D1 does not shine, light-receiving device D2 cut-off；At this time optocoupler every
End from device 131, the level of the output end of isolation circuit 13 is identical as the second reference voltage V2 level, i.e., isolation circuit 13 is defeated
Outlet exports high level, and third signal is high level.
Receiving second signal in the input terminal of negater circuit 12 is high level, i.e., when the input of positive-negative-positive input terminal is effective, opens
Pipe Q conducting is closed, the electric current of photophore D1 is greater than the rated current that photophore D1 shines, and photophore D1 shines, light-receiving device D2 conducting；
Optical coupling isolator 131 is connected at this time, and the output end of isolation circuit 13 exports low level, and third signal is low level.
Receiving second signal in the input terminal of negater circuit 12 is low level, i.e., when the input of positive-negative-positive input terminal is invalid, opens
Pipe Q cut-off is closed, photophore D1 does not shine, light-receiving device D2 cut-off；Optical coupling isolator 131 ends at this time, the output of isolation circuit 13
The level at end is identical as the second reference voltage V2 level, i.e., the output end of isolation circuit 13 exports high level, and third signal is height
Level.
The conversion circuit 10 of the present embodiment can not only be used for the input of NPN type input terminal, also can be used as the input of positive-negative-positive input terminal,
Input type can be replaced, extra soldered electronic component is not necessarily to, is easy to on-site maintenance and debugging, reduces the complexity of circuit, mention
High efficiency.
The application provides the conversion circuit of second embodiment, as shown in figure 4, the revealed conversion circuit of the embodiment is the
Be described on the basis of the revealed conversion circuit 10 of one embodiment: switching tube Q is NPN triode, wherein switching tube Q
First end is the base stage of NPN triode, and the second end of switching tube Q is the collector of NPN triode, and the third end of switching tube Q is
The emitter of NPN triode.
When it is high level that the input terminal of negater circuit 12, which receives second signal, the level of the base stage of NPN triode is
High level, NPN triode enter saturation region, the collector and emitter conducting of NPN triode.
When it is low level that the input terminal of negater circuit 12, which receives second signal, the level of the base stage of NPN triode is
Low level, NPN triode enter cut-off region, the collector and emitter cut-off of NPN triode.
The switching tube Q of the revealed conversion circuit of the present embodiment is NPN triode, avoids mentioning using machinery selection switch
The reliability of high conversion circuit.
The application provides the conversion circuit of 3rd embodiment, as shown in figure 5, the revealed conversion circuit of the embodiment is the
Be described on the basis of the revealed conversion circuit 10 of one embodiment: switching tube Q is N-type metal-oxide-semiconductor, wherein switching tube Q
First end is the grid of N-type metal-oxide-semiconductor, and the second end of switching tube Q is the drain electrode of N-type metal-oxide-semiconductor, and the third end of switching tube Q is N-type
The source electrode of metal-oxide-semiconductor.
When it is high level that the input terminal of negater circuit 12, which receives second signal, the level of the grid of N-type metal-oxide-semiconductor is height
Level, the conducting of N-type metal-oxide-semiconductor.
When it is low level that the input terminal of negater circuit 12, which receives second signal, the level of the grid of N-type metal-oxide-semiconductor is low
Level, the cut-off of N-type metal-oxide-semiconductor.
The switching tube Q of the revealed conversion circuit of the present embodiment is N-type metal-oxide-semiconductor, avoids improving using machinery selection switch
The reliability of conversion circuit.
The application further provides for the pinboard of first embodiment, as shown in fig. 6, pinboard 60 is provided with conversion circuit
61, the revealed conversion circuit of 61 above-described embodiment of conversion circuit, details are not described herein.
The application further provides for the control system of first embodiment, as shown in fig. 7, the control system 70 includes conversion electricity
Road 71, control system 70 is by conversion circuit 71 from the first signal of acquisition of load 72 or second signal, the conversion circuit 71
The revealed conversion circuit of embodiment is stated, details are not described herein.
In conclusion the conversion circuit of the application can not only be used for the input of NPN type input terminal, positive-negative-positive input terminal also can be used as
Input, can replace input type, be not necessarily to extra soldered electronic component, be easy to on-site maintenance and debugging, reduce the complexity of circuit
Degree, improves efficiency；In addition, switching tube Q is NPN triode or N-type metal-oxide-semiconductor, avoid improving conversion using machinery selection switch
The reliability of circuit.
It should be noted that the above various embodiments belongs to same inventive concept, the description of each embodiment emphasizes particularly on different fields,
Not detailed place is described in separate embodiment, can refer to the description in other embodiments.It is appreciated that each embodiment of the application can
To be used alone, can also be used in conjunction with the technical characteristic in other embodiments, the combination of each embodiment of the application still falls within this
Within the protection scope of invention.
Protection circuit and control system provided by the embodiment of the present application are described in detail above, it is used herein
The principle and implementation of this application are described for specific case, and the above embodiments are only used to help understand
The present processes and its core concept；At the same time, for those skilled in the art is having according to the thought of the application
There will be changes in body embodiment and application range, in conclusion the content of the present specification should not be construed as to the application
Limitation.
Claims (10)
1. a kind of conversion circuit, which is characterized in that the conversion circuit is applied to control system, and the conversion circuit at least wraps
It includes:
Forward circuit, the input terminal of the forward circuit is for receiving the first signal；
Negater circuit, the input terminal of the negater circuit is for receiving second signal；
Isolation circuit is coupled with the forward circuit and the negater circuit, is used for first signal or described second
Signal is converted to third signal, and the output end of the isolation circuit and the control system couple, and the control system is from described
Isolation circuit receives the third signal.
2. conversion circuit according to claim 1, which is characterized in that the forward circuit includes at least first resistor, institute
One end of first resistor is stated for receiving first signal, the other end of the first resistor is connect with the isolation circuit.
3. conversion circuit according to claim 2, which is characterized in that the negater circuit includes at least second resistance, the
Three resistance and switching tube, one end of the second resistance connect for receiving the second signal, the other end of the second resistance
The first end of the switching tube is connect, one end of the 3rd resistor connects the first end of the switching tube, the 3rd resistor
Other end ground connection, the second end of the switching tube are connect with one end of the first resistor, the third end of the switching tube and institute
State the other end connection of 3rd resistor.
4. conversion circuit according to claim 3, which is characterized in that the isolation circuit includes optical coupling isolator and the 4th
The first end of resistance, the optical coupling isolator inputs the first reference voltage, the second end of the optical coupling isolator and described first
The other end of resistance connects, and the third end of the optical coupling isolator is connect with one end of the 4th resistance, the 4th resistance
The other end input the second reference voltage, the optical coupling isolator the 4th end ground connection, the third end of the optical coupling isolator is
The output end of the isolation circuit.
5. conversion circuit according to claim 4, which is characterized in that when first signal is high level, the light
The cut-off of coupling isolator, the third signal are high level；When first signal is low level, the optical coupling isolator is led
Logical, the third signal is low level.
6. conversion circuit according to claim 4, which is characterized in that when the second signal is high level, the light
The conducting of coupling isolator, the third signal are low level；When the second signal is low level, the optical coupling isolator is cut
Only, the third signal is high level.
7. conversion circuit according to claim 4, which is characterized in that the switching tube is NPN triode, the switching tube
First end be the NPN triode base stage, the second end of the switching tube is the collector of the NPN triode, described
The third end of switching tube is the emitter of the NPN triode.
8. conversion circuit according to claim 4, which is characterized in that the switching tube is N-type metal-oxide-semiconductor, the switching tube
First end be the N-type metal-oxide-semiconductor grid, the second end of the switching tube is the drain electrode of the N-type metal-oxide-semiconductor, the switch
The third end of pipe is the source electrode of the N-type metal-oxide-semiconductor.
9. a kind of control system, which is characterized in that the control system includes the conversion as described in claim 1-8 any one
Circuit, the control system obtain the first signal or second signal from load by the conversion circuit.
10. a kind of pinboard, which is characterized in that the pinboard is arranged just like conversion described in claim 1-8 any one
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821763922.8U CN208999815U (en) | 2018-10-26 | 2018-10-26 | Conversion circuit, pinboard and control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821763922.8U CN208999815U (en) | 2018-10-26 | 2018-10-26 | Conversion circuit, pinboard and control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208999815U true CN208999815U (en) | 2019-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821763922.8U Active CN208999815U (en) | 2018-10-26 | 2018-10-26 | Conversion circuit, pinboard and control system |
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| Country | Link |
|---|---|
| CN (1) | CN208999815U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023165508A1 (en) * | 2022-03-02 | 2023-09-07 | 广东科伺智能科技有限公司 | Pulse signal output circuit |
-
2018
- 2018-10-26 CN CN201821763922.8U patent/CN208999815U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023165508A1 (en) * | 2022-03-02 | 2023-09-07 | 广东科伺智能科技有限公司 | Pulse signal output circuit |
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