CN204965124U - Real standard is with PLC switching value input/output protection circuit arrangement - Google Patents
Real standard is with PLC switching value input/output protection circuit arrangement Download PDFInfo
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- CN204965124U CN204965124U CN201520633941.9U CN201520633941U CN204965124U CN 204965124 U CN204965124 U CN 204965124U CN 201520633941 U CN201520633941 U CN 201520633941U CN 204965124 U CN204965124 U CN 204965124U
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- plc
- protection circuit
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- switching value
- fuse
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Abstract
The utility model provides a real standard is with PLC switching value input/output protection circuit arrangement, it mainly includes: PLC, PLC switching value input protection circuit, PLC switch quantity output protection circuit, PLC switching value input meet and have switching value input protection circuit, this switching value input protection circuit includes the input power module who is connected with first fuse, this first fuse and the coil common port that the relay is kept apart in the input is connected, the relay is kept apart in the input normally open contact with PLC DC power supply output, PLC switching value input are connected, PLC switch quantity output end meet and have a switch quantity output protection circuit, this switch quantity output protection circuit includes that switch quantity output's common port is connected with the export power supply module, this export power supply module is connected with the second fuse, this second fuse is connected with a solid state relay's input, another input of this solid state relay and the port of PLC switch quantity output end is connected.
Description
Technical field
The utility model relates to a kind of PLC On-off signal output protection circuit device of real training, belongs to PLC automatic control technology field.
Background technology
PLC is a kind of is core with microprocessor, combines computer technology, electrical equipment control technology and automated control technology and a kind of novel, the general programmable logic controller (PLC) that grows up.Along with the continuous propelling of China's automated process, PLC is as the important component part of automation control system, and will there be larger development in future.According to this development situation, each universities and colleges, vocational school are all using PLC teaching and the professional core class of real training as specialties such as Electric automation technology, electromechanical integration technology, application electric technology, Numeric Control Technologies.
But in the process that the on-the-spot real training of PLC uses, there is wiring error unavoidably, cause the port overcurrent damage that PLC On-off signal exports.
Summary of the invention
The purpose of this utility model is the deficiency overcoming prior art existence; and provide a kind of rational in infrastructure; use easy to operate, can solve in on-the-spot real training use procedure preferably, because of the real training PLC protection circuit for input and output device of overcurrent damage PLC input/output port.
The purpose of this utility model has been come by following technical solution, a kind of real training PLC On-off signal output protection circuit device, it mainly comprises: PLC, PLC On-off signal protection circuit, PLC switching value output protection circuit, described PLC On-off signal end is connected to an On-off signal protection circuit, this On-off signal protection circuit comprises the input power module be connected with the first fuse FU11, this first fuse FU11 is connected with the coil common port of described input disconnecting relay, button is circumscribed with between the coil of described input power module and described input disconnecting relay, sensor, relay contact, gear on-off, the normally open contact of described input disconnecting relay is connected with described PLC DC power output end, PLC On-off signal end, described PLC output switch parameter end is connected to a switching value output protection circuit.
As preferably: the public port that described switching value output protection circuit comprises output switch parameter is connected with out-put supply module; this out-put supply module is connected with the second fuse FU12; this second fuse FU12 is connected with the input end of a solid-state relay; another input end of this solid-state relay is connected with the port of described PLC output switch parameter end, is circumscribed with fuse, load power source and load between the output terminal of described solid-state relay.
The beneficial effects of the utility model are:
1), that the utility model has circuit is simple, and it is convenient, workable to implement;
2), the utility model adopt element be ordinary appliances element, easily buy, with low cost;
3), input circuit overcurrent time, by input disconnecting relay loop isolation, guarantee that PLC On-off signal port is unaffected when input circuit overcurrent;
4), load circuit overcurrent time, isolated by solid-state relay loop, guarantee that PLC output switch parameter port is unaffected when load circuit overcurrent;
5) solid-state relay matched, is selected according to PLC output switch parameter type, required output frequency and loading condition;
6) the utility model is not only used in real training, and also can be applicable in various occasion, various types of PLC On-off signal output circuit, generalization is strong.
The utility model has rational in infrastructure, uses easy to operate, can solve preferably in on-the-spot real training use procedure, because of features such as overcurrent damage PLC input/output port problems.
Accompanying drawing explanation
Fig. 1 is the composition frame chart of real training PLC On-off signal output protection circuit device described in the utility model
Fig. 2 is real training PLC On-off signal port protection circuit schematic diagram described in the utility model.
Fig. 3 is the protection circuit schematic diagram of real training PLC output switch parameter port described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail: shown in Fig. 1; a kind of real training PLC On-off signal output protection circuit device described in the utility model, it mainly comprises PLC, PLC On-off signal protection circuit, PLC switching value output protection circuit.
Shown in composition graphs 2, described PLC On-off signal end is connected to an On-off signal protection circuit, this On-off signal protection circuit comprises the input power module be connected with the first fuse FU11, this first fuse FU11 is connected with the coil common port of described input disconnecting relay, is circumscribed with button, sensor, relay contact, gear on-off between the coil of described input power module and described input disconnecting relay; The normally open contact of described input disconnecting relay is connected with described PLC DC power output end, PLC input end; Described PLC output terminal is connected to a PLC switching value output protection circuit.
Shown in composition graphs 3, the utility model preferred embodiment is: described PLC output terminal is connected to one by PLC switching value output protection circuit, described PLC switching value output protection circuit comprises: the common port of PLC output switch parameter is connected with out-put supply module, this out-put supply module is connected with one second fuse FU12, this second fuse FU12 is connected with the input end of a solid-state relay, another input end of this solid-state relay is connected with the port of described PLC output terminal, fuse is circumscribed with between the output terminal of described solid-state relay, load power source and load.
Embodiment: shown in Fig. 1-3, the PLC On-off signal output port protection circuit device of a kind of real training described in the utility model, it comprises PLC, PLC On-off signal protection circuit, PLC switching value output protection circuit.
One end of described input power module is connected with one end of described first fuse FU11, the other end of described first fuse FU11 and described input disconnecting relay coil KA
x0-KA
x7common port be connected, the other end of described input power module and described input disconnecting relay coil KA
x0-KA
x7the other end between the electric elements such as external button, sensor, relay contact, gear on-off.
Described PLC out-put supply one end inputs common port S/S with described PLC and is connected, described input disconnecting relay KA
x0-KA
x7the common port of normally open contact is connected with the described PLC out-put supply other end, described input disconnecting relay KA
x0-KA
x7the normally open contact other end is connected with described PLC On-off signal end X0-X7.
The common port COM1 of described PLC output switch parameter is connected with one end of described out-put supply module, the other end of described out-put supply module is connected with one end of described second fuse FU12, the other end of the second described fuse FU12 and described solid-state relay KS
1-KS
4one end of input end is connected, described solid-state relay KS
1-KS
4the other end of input end is connected with described PLC output switch parameter end Y0-Y3, described solid-state relay KS
1-KS
4output terminal between external fuse, load power source, load.
Because PLC On-off signal terminal protecting circuit realizes input disconnecting relay KA
x0-KA
x7wire loop and input disconnecting relay KA
x0-KA
x7electric isolution between normally open contact loop and signal transmission; When there is over-current phenomenon avoidance in input circuit, damage be input disconnecting relay KA in PLC input port protection circuit
x0-KA
x7the electric elements of wire loop, can not damage the input port of PLC, thus play a protective role.
PLC output switch parameter terminal protecting circuit principle of work: when PLC output switch parameter end produces a signal, solid-state relay input end receives this signal, simultaneously this signal coupling to solid-state relay output port, the load action in load circuit.
Because PLC output switch parameter port protection circuit realizes electric isolution between solid-state relay input end (control loop) and output terminal (load circuit) and signal coupling, as solid-state relay KS
1-KS
4when over-current phenomenon avoidance appears in output terminal, PLC output switch parameter port can not be damaged, thus play a protective role.
Claims (2)
1. a real training PLC On-off signal output protection circuit device, it mainly comprises: PLC, PLC On-off signal protection circuit, PLC switching value output protection circuit, it is characterized in that described PLC On-off signal end is connected to an On-off signal protection circuit, this On-off signal protection circuit comprises the input power module be connected with the first fuse FU11, this first fuse FU11 is connected with the coil common port of described input disconnecting relay, button is circumscribed with between the coil of described input power module and described input disconnecting relay, sensor, relay contact, gear on-off, the normally open contact of described input disconnecting relay is connected with described PLC DC power output end, PLC On-off signal end, described PLC output switch parameter end is connected to a switching value output protection circuit.
2. real training PLC On-off signal output protection circuit device according to claim 1; it is characterized in that the public port that described switching value output protection circuit comprises output switch parameter is connected with out-put supply module; this out-put supply module is connected with the second fuse FU12; this second fuse FU12 is connected with the input end of a solid-state relay; another input end of this solid-state relay is connected with the port of described PLC output switch parameter end, is circumscribed with fuse, load power source and load between the output terminal of described solid-state relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520633941.9U CN204965124U (en) | 2015-08-21 | 2015-08-21 | Real standard is with PLC switching value input/output protection circuit arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520633941.9U CN204965124U (en) | 2015-08-21 | 2015-08-21 | Real standard is with PLC switching value input/output protection circuit arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204965124U true CN204965124U (en) | 2016-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520633941.9U Expired - Fee Related CN204965124U (en) | 2015-08-21 | 2015-08-21 | Real standard is with PLC switching value input/output protection circuit arrangement |
Country Status (1)
| Country | Link |
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| CN (1) | CN204965124U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445337A (en) * | 2018-10-31 | 2019-03-08 | 珠海格力电器股份有限公司 | Port protection circuit and control method, control circuit, device and system thereof |
-
2015
- 2015-08-21 CN CN201520633941.9U patent/CN204965124U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445337A (en) * | 2018-10-31 | 2019-03-08 | 珠海格力电器股份有限公司 | Port protection circuit and control method, control circuit, device and system thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160113 Termination date: 20160821 |