CN204256481U - The I/O signal treatment circuit of digital control system - Google Patents
The I/O signal treatment circuit of digital control system Download PDFInfo
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- CN204256481U CN204256481U CN201420677549.XU CN201420677549U CN204256481U CN 204256481 U CN204256481 U CN 204256481U CN 201420677549 U CN201420677549 U CN 201420677549U CN 204256481 U CN204256481 U CN 204256481U
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- photoelectrical coupler
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Abstract
The utility model discloses a kind of I/O signal treatment circuit of digital control system, comprise the bridge circuit being provided with four unilateral diodes, two input ports of this bridge circuit are connected respectively to I/O signal input end and the COM end of digital control system, two output ports are connected with the former limit of photoelectrical coupler, secondary one end of this photoelectrical coupler is connected to I/O signal output terminal by I/O signal outlet line, other end ground connection, and, in described bridge circuit, two the unilateral diode forwards being connected to the positive terminal of light emitting diode in described photoelectrical coupler are arranged, two unilateral diodes being connected to the negative pole end of described light emitting diode are oppositely arranged.The utility model not only can well automatic compatible opposed polarity input/output signal, improve numerical control products versatility, and cost is low, is conducive to large-scale promotion, production, application.
Description
Technical field
The utility model relates to Numeric Control Technology, particularly relate to a kind of can the I/O signal treatment circuit of digital control system of IO input signal of automatic compatible NPN/PNP two kinds of polarity.
Background technology
The digital control system major part of prior art can only support unipolar NPN type IO input signal or positive-negative-positive IO input signal, although or have the function of the IO input signal supporting above-mentioned two kinds of polarity, but need manual adjustments, robotization, intelligence degree deficiency, troublesome poeration, is not suitable for the production application of low cost, large scale integration.
Utility model content
The technical matters that the utility model solves is, a kind of I/O signal treatment circuit of digital control system is provided, this circuit not only can well automatic compatible opposed polarity input/output signal, improve numerical control products versatility, and cost is low, is conducive to large-scale promotion, production, application.
In order to solve the problems of the technologies described above, the utility model discloses following scheme:
A kind of I/O signal treatment circuit of digital control system, comprise the bridge circuit being provided with four unilateral diodes, two input ports of this bridge circuit are connected respectively to I/O signal input end and the COM end of digital control system, two output ports are connected with the former limit of photoelectrical coupler, secondary one end of this photoelectrical coupler is connected to I/O signal output terminal by I/O signal outlet line, other end ground connection, and, in described bridge circuit, two the unilateral diode forwards being connected to the positive terminal of light emitting diode in described photoelectrical coupler are arranged, two unilateral diodes being connected to the negative pole end of described light emitting diode are oppositely arranged.
Preferably, also leakage path is provided with at the former avris of described photoelectrical coupler.
Preferably, between the input end and I/O signal input end of described bridge circuit, limit return flow circuit is also provided with.
Preferably, described IO outlet line is also connected with beam circuit.
Preferably, described leakage path be connected to described photoelectrical coupler two former limit input ends between bleeder resistance (R308).
Preferably, described limit return flow circuit is the current-limiting resistance (R301) be connected between the input end of described bridge circuit and I/O signal input end.
Preferably, described beam circuit is the beam resistance (R315) that one end is connected on described I/O signal outlet line, the other end is connected to power supply.
Preferably, described I/O signal outlet line is also connected with direct earth capacitance (C301).
The beneficial effects of the utility model are:
Embodiment of the present utility model arranges diode-bridge circuit by the former avris at photoelectrical coupler, thus achieve the isolation conducting function of the input/output signal to opposed polarity, automatically the compatible well input/output signal of opposed polarity, improve numerical control products versatility, and cost is low, be conducive to large-scale promotion, production, application.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit block diagram of an I/O signal treatment circuit embodiment of digital control system of the present utility model.
Fig. 2 is the circuit connection diagram of an I/O signal treatment circuit embodiment of digital control system of the present utility model.
Embodiment
An embodiment of the I/O signal treatment circuit of the digital control system that the utility model provides is described in detail below with reference to Fig. 1 and Fig. 2, as shown in the figure, the present embodiment mainly comprises the bridge circuit 1 being provided with four unilateral diodes, two input ports of this bridge circuit 1 are connected respectively to the I/O signal input end A2 of digital control system and the COM end ACOM_IN of input signal, two output ports are connected with the former limit of photoelectrical coupler 2, secondary one end of this photoelectrical coupler 2 is connected to I/O signal output terminal by I/O signal outlet line, other end ground connection, and, in described bridge circuit, two the unilateral diode forwards being connected to the positive terminal of light emitting diode in described photoelectrical coupler 2 are arranged, two unilateral diodes being connected to the negative pole end of described light emitting diode are oppositely arranged.
In addition, also leakage path 3 can be provided with at the former avris of described photoelectrical coupler 2; During specific implementation, this leakage path 3 can be set to the bleeder resistance R308 be connected between two former limit input ends of photoelectrical coupler 2, and the effect of resistance R308 is to provide a leakage path, improves the response speed of photoelectrical coupler 2.
In addition, between the input end and I/O signal input end of described bridge circuit, limit return flow circuit 4 is also provided with; During specific implementation, this limit return flow circuit 4 can be set to the current-limiting resistance R301 be connected between the input end of described bridge circuit and I/O signal input end, and the effect of resistance R301 is the electric current of restriction input circuit.
In addition, described IO outlet line is also connected with beam circuit 5; During specific implementation, this beam circuit 5 can be set to the beam resistance R315 that one end is connected on described I/O signal outlet line, the other end is connected to power supply, the effect of resistance R315 is an extra injection electric current, avoids circuit because Injection Current too small and cisco unity malfunction.
In addition, described I/O signal outlet line also can be connected with direct earth capacitance C301.
The principle of work of the present embodiment is described in detail below with reference to Fig. 2.
When the COM of input signal holds the voltage of ACOM_IN to be positive voltage (24V);
If I/O signal input end A2 inputs a low level (0V), this is an effective input signal, and the light emitting diode of photoelectrical coupler 2 has electric current, illuminated triode conducting, output logic low level; If I/O signal input end A2 input high level (24V) or unsettled, the light emitting diode of photoelectrical coupler 2 does not have electric current, illuminated triode not conducting, output logic high level.Circuit is now NPN circuit.
When the COM of input signal holds the voltage of ACOM_IN to be 0 voltage (0V):
If I/O signal input end A2 inputs a high level (24V), this is an effective input signal, and the light emitting diode of photoelectrical coupler 2 has electric current, illuminated triode conducting, output logic low level; If I/O signal input end A2 input low level (0V) or unsettled, the light emitting diode of photoelectrical coupler 2 does not have electric current, illuminated triode not conducting, output logic high level.Circuit is now PNP circuit.
According to above principle, namely the present embodiment achieves the automatic compatibility to NPN input signal and PNP input signal, and actual use is simple, easy to operate.
Compared with prior art, the utility model has the following advantages:
The polarity that the utility model can realize NPN/PNP input signal is selected, not only can automatic compatible opposed polarity input/output signal well, improve numerical control products versatility, tool and cost low, be conducive to large-scale promotion, production, application, have good practical value and application prospect.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, some simple deduction or replace can also be made, all should be considered as belonging to protection domain of the present utility model.
Claims (8)
1. the I/O signal treatment circuit of a digital control system, it is characterized in that, comprise the bridge circuit being provided with four unilateral diodes, two input ports of this bridge circuit are connected respectively to I/O signal input end and the COM end of digital control system, two output ports are connected with the former limit of photoelectrical coupler, secondary one end of this photoelectrical coupler is connected to I/O signal output terminal by I/O signal outlet line, other end ground connection, and, in described bridge circuit, two the unilateral diode forwards being connected to the positive terminal of light emitting diode in described photoelectrical coupler are arranged, two unilateral diodes being connected to the negative pole end of described light emitting diode are oppositely arranged.
2. the I/O signal treatment circuit of digital control system as claimed in claim 1, is characterized in that, be also provided with leakage path at the former avris of described photoelectrical coupler.
3. the I/O signal treatment circuit of digital control system as claimed in claim 1, is characterized in that, between the input end and I/O signal input end of described bridge circuit, be also provided with limit return flow circuit.
4. the I/O signal treatment circuit of digital control system as claimed in claim 1, is characterized in that, described IO outlet line is also connected with beam circuit.
5. the I/O signal treatment circuit of digital control system as claimed in claim 2, is characterized in that, described leakage path be connected to described photoelectrical coupler two former limit input ends between bleeder resistance (R308).
6. the I/O signal treatment circuit of digital control system as claimed in claim 3, it is characterized in that, described limit return flow circuit is the current-limiting resistance (R301) be connected between the input end of described bridge circuit and I/O signal input end.
7. the I/O signal treatment circuit of digital control system as claimed in claim 4, it is characterized in that, described beam circuit is the beam resistance (R315) that one end is connected on described I/O signal outlet line, the other end is connected to power supply.
8. the I/O signal treatment circuit of the digital control system according to any one of claim 1-7, is characterized in that, described I/O signal outlet line is also connected with direct earth capacitance (C301).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420677549.XU CN204256481U (en) | 2014-11-13 | 2014-11-13 | The I/O signal treatment circuit of digital control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420677549.XU CN204256481U (en) | 2014-11-13 | 2014-11-13 | The I/O signal treatment circuit of digital control system |
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| Publication Number | Publication Date |
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| CN204256481U true CN204256481U (en) | 2015-04-08 |
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| CN201420677549.XU Active CN204256481U (en) | 2014-11-13 | 2014-11-13 | The I/O signal treatment circuit of digital control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109951113A (en) * | 2019-03-08 | 2019-06-28 | 深圳市雷赛智能控制股份有限公司 | Motor driver, automation equipment and automatic control system |
| WO2019152348A1 (en) * | 2018-01-30 | 2019-08-08 | Parker-Hannifin Corporation | Method and apparatus for configuring i/o modules connected to a fieldbus controller |
-
2014
- 2014-11-13 CN CN201420677549.XU patent/CN204256481U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019152348A1 (en) * | 2018-01-30 | 2019-08-08 | Parker-Hannifin Corporation | Method and apparatus for configuring i/o modules connected to a fieldbus controller |
| US11392519B2 (en) | 2018-01-30 | 2022-07-19 | Parker-Hannifin Corporation | Method and apparatus for configuring I/O modules connected to a fieldbus controller |
| CN109951113A (en) * | 2019-03-08 | 2019-06-28 | 深圳市雷赛智能控制股份有限公司 | Motor driver, automation equipment and automatic control system |
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