CN202189257U - PLC expansion output circuit - Google Patents
PLC expansion output circuit Download PDFInfo
- Publication number
- CN202189257U CN202189257U CN2011202515682U CN201120251568U CN202189257U CN 202189257 U CN202189257 U CN 202189257U CN 2011202515682 U CN2011202515682 U CN 2011202515682U CN 201120251568 U CN201120251568 U CN 201120251568U CN 202189257 U CN202189257 U CN 202189257U
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- CN
- China
- Prior art keywords
- plc
- serial
- circuit
- output circuit
- expansion output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a PLC expansion output circuit, which belongs to the field of an electric circuit technology. The technology scheme includes the points as following: the PLC expansion output circuit comprises an optoelectronic coupler (101), a plurality of serial-parallel chips (102, 103) and a multi-point output interface (104); the serial-parallel chips are connected employing a cascade mode and are coupled together to connect the multi-point output interface; the optoelectronic coupler is couplingly connected to the serial-parallel chips; and the optoelectronic coupler is responsible for level transition with a PLC interface; the cascade serial-parallel chips is responsible for serial-parallel data transition, and a plurality of points are expanded. In the utility model, the PLC expansion output circuit possesses the advantages as following: the system function is enhanced under the condition that the prior PLC design is unchanged; the design is characterized in that the circuit is simple, usage is convenient, reliability is high, and cost is low, and the PLC expansion output circuit can well substitute a traditional I/O module; and the PLC expansion output circuit provided in the utility model is characterized in that the traditional I/O module of PLC is saved, the circuit is simple, usage is convenient, cost is reduced, etc.
Description
Technical field
The utility model relates to a kind of circuit of PLC expansion output, belongs to the electronic circuit technology field.
Background technology
At present, PLC output point expansion usual way is to increase the I/O module that matches with PLC or select to count more PLC, and the problem that background technology exists is exactly that the cost of system is soaring.
The utility model content
The utility model purpose provides a kind of circuit of PLC expansion output, under the situation that does not change original PLC design, increases systemic-function, can well replace traditional I/O module, solves the problems referred to above that exist in the background technology.
The technical scheme of the utility model is: a kind of circuit of PLC expansion output; Comprise photoelectrical coupler, multi-disc serial parallel chip, multiple spot output interface; Multi-disc serial parallel chip adopts the mode of cascade to link together; Common match connects the multiple spot output interface, and photoelectrical coupler is connected with multi-disc serial parallel chip coupling; Photoelectrical coupler is responsible for and the conversion of PLC interface level, and the multi-disc serial parallel chip of cascade is responsible for the serial parallel data-switching, expands a plurality of points.
Said multi-disc serial parallel chip is two, through the method for two cascades, with 16 output points of three output line expansions of PLC.
The photoelectrical coupler model is TLP521, is responsible for and the conversion of PLC interface level, and two serial parallel chip models are HC595; Adopt the mode of cascade to connect; Be responsible for the serial parallel data-switching, the multiple spot output interface is a NPN triode 8050, and output interface is totally 16 points (road).
The utility model in use; Need PLC one section driver of method of application establishment, through output port control parallel clock line, serial time clock line according to the serial parallel chip; Data line makes the PLC expansion board export corresponding state; PLC sends different data PLC expansion board and just exports different state, and the I/O module is simple just as using, and is convenient.
The good effect of the utility model is: the utility model increases systemic-function under the situation that does not change original PLC design, and this design has that circuit is simple, easy to use, and reliability is high, and characteristics with low cost can well replace traditional I/O module; The utlity model has saved PLC traditional I/O module, circuit simple, easy to use, cut down characteristics such as cost.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model embodiment;
Accompanying drawing 2 is serial parallel chip HC595 synoptic diagram;
Among the figure: photoelectrical coupler 101, serial parallel chip 102,103, multiple spot output interface 104, parallel clock R, serial clock S, data D.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further through embodiment.
Among the embodiment, said multi-disc serial parallel chip is two, through the method for two cascades, with 16 output points of three output line expansions of PLC.Photoelectrical coupler 101 models are TLP521, are responsible for and the conversion of PLC interface level, and two serial parallel chip 102,103 models are HC595; Adopt the mode of cascade to connect; Be responsible for the serial parallel data-switching, multiple spot output interface 104 is NPN triodes 8050, and output interface is totally 16 points (road).
8 bit serial I/O of HC595 chip or parallel Output Shift Register have the high resistant off state.
Characteristics: 8 bit serial input; 8 bit serial or and line output; The store status register, three kinds of states; Output register can directly be removed; The transposition frequency of 100MHz.
Fan-out capability: and line output, bus driver; Serial output; Standard; Medium-scale integrated circuit.
Use: serial-to-parallel data-switching.
Describe: HC595 is the cmos device of silicon structure at a high speed; Compatible low-voltage TTL circuit is observed the JEDEC standard.
HC595 has 8 bit shift register and a storer, ternary output function.
Shift register and storer are other clocks of branch.
Data are in the input of the rising edge of SCHcp, enter into storage register at the rising edge of STcp.If two clocks connect together, then shift register is always than the Zao pulse of storage register.
Shift register has serial-shift input (Ds) and serial output (Q7 ') and an asynchronous low level to reset; Storage register has one parallel 8; Possess ternary bus output, when enabling OE (for low level), the data of storage register output to bus.
The pin explanation
| Symbol | Pin | Describe |
| Q0 ... | 15,1,7 | Parallel |
| GND | ||
| 8 | Ground | |
| Q7 ' | 9 | Serial |
| MR | ||
| 10 | Master reset (low level) | |
| SHCP | 11 | The shift register |
| STCP | ||
| 12 | The input of storage | |
| OE | ||
| 13 | Output is (low level) effectively | |
| DS | 14 | The serial |
| VCC | ||
| 16 | Power supply |
Menu:
The H=high level state
The L=low level state
↑=rising edge
↓=negative edge
The Z=high resistant
The NC=no change
*=invalid
When MR is a high level, when OE was low level, data got into shift register at the SHCP rising edge,
The STCP rising edge outputs to parallel port.
Need PLC one section driver of method of application establishment in use according to HC595; Through output port control parallel clock line; Serial time clock line, data line make the PLC expansion board export corresponding state, and PLC sends different data PLC expansion board and just exports different state; The I/O module is simple just as using, and is convenient.
Claims (3)
1. a PLC expands the circuit of exporting; It is characterized in that comprising photoelectrical coupler (101), multi-disc serial parallel chip (102,103), multiple spot output interface (104); Multi-disc serial parallel chip adopts the mode of cascade to link together; Common match connects the multiple spot output interface, and photoelectrical coupler is connected with multi-disc serial parallel chip coupling.
2. according to the circuit of the said PLC expansion output of claim 1, it is characterized in that said multi-disc serial parallel chip is two.
3. the circuit that said PLC expansion is exported according to claim 1; It is characterized in that the photoelectrical coupler model is TLP521, be responsible for and the conversion of PLC interface level that two serial parallel chip models are HC595; Adopt the mode of cascade to connect; Be responsible for the serial parallel data-switching, the multiple spot output interface is a NPN triode 8050, and output interface is totally 16 points.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202515682U CN202189257U (en) | 2011-07-18 | 2011-07-18 | PLC expansion output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202515682U CN202189257U (en) | 2011-07-18 | 2011-07-18 | PLC expansion output circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202189257U true CN202189257U (en) | 2012-04-11 |
Family
ID=45920696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202515682U Expired - Fee Related CN202189257U (en) | 2011-07-18 | 2011-07-18 | PLC expansion output circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202189257U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243485A (en) * | 2011-07-18 | 2011-11-16 | 唐山奥力科技有限公司 | PLC (Programmable Logic Controller) extended output circuit |
| CN102722111A (en) * | 2012-06-14 | 2012-10-10 | 宝鸡石油机械有限责任公司 | Shifting switching value input/output device |
| CN111983270A (en) * | 2020-07-30 | 2020-11-24 | 华润赛美科微电子(深圳)有限公司 | Expansion circuit, tester and test method |
-
2011
- 2011-07-18 CN CN2011202515682U patent/CN202189257U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243485A (en) * | 2011-07-18 | 2011-11-16 | 唐山奥力科技有限公司 | PLC (Programmable Logic Controller) extended output circuit |
| CN102243485B (en) * | 2011-07-18 | 2013-07-24 | 唐山奥力科技有限公司 | PLC (Programmable Logic Controller) extended output circuit |
| CN102722111A (en) * | 2012-06-14 | 2012-10-10 | 宝鸡石油机械有限责任公司 | Shifting switching value input/output device |
| CN102722111B (en) * | 2012-06-14 | 2014-04-02 | 宝鸡石油机械有限责任公司 | Shifting switching value input/output device |
| CN111983270A (en) * | 2020-07-30 | 2020-11-24 | 华润赛美科微电子(深圳)有限公司 | Expansion circuit, tester and test method |
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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 |
Granted publication date: 20120411 Termination date: 20140718 |
|
| EXPY | Termination of patent right or utility model |