Interference suppression device for PLC control system

Abstract

The utility model relates to an interference suppression device for a PLC control system, and relates to the technical field of PLC control systems. An interference suppression device for a PLC control system is used for improving the anti-interference capability of the PLC control system and comprises a power supply interference suppression module, a signal high-frequency suppression module, a ground screen interference suppression module, a first terminal strip and a second terminal strip. Through the arrangement of the power supply interference suppression module, the influence of transient overvoltage and high-frequency interference caused by lightning stroke, grounding, operation and the like can be effectively eliminated, and the stability of an input power supply of the PLC control system is guaranteed; by arranging the signal high-frequency suppression module, interference introduced by an external signal line can be effectively eliminated; by arranging the earth screen interference suppression module, interference fleeing from the grounding side and interference of ground potential counterattack overvoltage can be effectively eliminated.

Description

Technical Field

[0001] The present application relates to the technical field of PLC control systems, and in particular to an interference suppression device for a PLC control system. Background Art

[0002] PLC is widely used in industrial control. The stability and reliability of PLC automatic control systems are directly related to the safe production and normal operation of industrial enterprises.

[0003] In actual production processes, PLC control systems are typically deployed near the controlled equipment to facilitate real-time monitoring and control. However, this arrangement also makes PLC control systems susceptible to external interference, including electromagnetic interference caused by strong and weak currents, interference caused by chaotic grounding systems, and power supply interference, which can seriously affect the stability and security of PLC control systems. Utility Model Content

[0004] In order to solve or partially solve the problems existing in the related art, the present application provides an interference suppression device for a PLC control system, which can effectively improve the anti-interference ability of the PLC control system and ensure the safe and stable operation of the PLC control system.

[0005] The present application provides an interference suppression device for a PLC control system, which is used to improve the anti-interference capability of the PLC control system. The interference suppression device includes: a power supply interference suppression module, a signal high-frequency suppression module, a ground network interference suppression module, a first terminal block, and a second terminal block;

[0006] The input end of the power supply interference suppression module is electrically connected to the external AC power supply, and the output end of the power supply interference suppression module is electrically connected to the power supply module of the PLC control system;

[0007] The output end of the signal high-frequency suppression module is electrically connected to the signal input end of the PLC control system, and the input end of the signal high-frequency suppression module is electrically connected to the signal output end of the external device;

[0008] The output end of the ground grid interference suppression module is grounded, and the input end of the ground grid interference suppression module is electrically connected to the output end row of the second terminal;

[0009] The input end of the second terminal block is electrically connected to the ground wire of the device in the PLC control system;

[0010] The output end of the first terminal block is grounded, and the input end of the first terminal block is electrically connected to the device housing and the neutral line in the PLC control system.

[0011] Optionally, in some embodiments of the present application:

[0012] The power supply interference suppression module is a power supply interference suppressor.

[0013] Optionally, in some embodiments of the present application:

[0014] The signal high-frequency suppression module is a filter, specifically a low-pass filter.

[0015] Optionally, in some embodiments of the present application:

[0016] The ground grid interference suppression module is a ground grid interference suppressor.

[0017] Optionally, in some embodiments of the present application:

[0018] The PLC control system and the interference suppression device are both installed in a PLC control cabinet.

[0019] The technical solution provided by this application may have the following beneficial effects:

[0020] By setting up a power supply interference suppression module, this application can effectively eliminate the influence of transient overvoltage and high-frequency interference caused by lightning strikes, grounding, operation, etc., and ensure the input power stability of the PLC control system; by setting up a signal high-frequency suppression module, it can effectively eliminate the interference introduced from external signal lines; by setting up a ground grid interference suppression module, it can effectively eliminate the interference due to the grounding side and the interference of ground potential counter-attack overvoltage.

[0021] The interference suppression device set in this application can effectively improve the anti-interference ability of the PLC control system, ensure the stable operation of the PLC control system in various complex electromagnetic environments, and improve the stability and reliability of the PLC control system.

[0022] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0024] Figure 1 It is a structural diagram of the interference suppression device in an embodiment of the present application.

[0025] Figure numerals: 1-external AC power supply, 2-power supply interference suppression module, 3-PLC control system, 4-signal high-frequency suppression module, 5-ground grid interference suppression module, 6-first terminal block, 7-second terminal block. DETAILED DESCRIPTION

[0026] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0027] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0029] Unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0030] In actual production processes, the PLC control system 3 is typically deployed near the controlled equipment to facilitate real-time monitoring and control of the equipment. However, this deployment also makes the PLC control system 3 susceptible to external interference, including electromagnetic interference caused by strong and weak currents, interference caused by a chaotic grounding system, and power supply interference, which seriously affects the stability and safety of the PLC control system 3.

[0031] In response to the above problems, an embodiment of the present application provides an interference suppression device for a PLC control system 3, which can effectively improve the anti-interference capability of the PLC control system 3 and ensure the safe and stable operation of the PLC control system 3.

[0032] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0033] Figure 1 It is a structural diagram of the interference suppression device in an embodiment of the present application.

[0034] See also Figure 1 An interference suppression device for a PLC control system 3 is used to improve the anti-interference ability of the PLC control system 3. The interference suppression device includes: a power supply interference suppression module 2, a signal high-frequency suppression module 4, a ground grid interference suppression module 5, a first terminal block 6 and a second terminal block 7.

[0035] The input end of the power supply interference suppression module 2 is electrically connected to the external AC power supply 1, and the output end of the power supply interference suppression module 2 is electrically connected to the power supply module of the PLC control system 3;

[0036] Specifically, the power supply interference suppression module 2 is a power supply interference suppressor.

[0037] In this embodiment, by electrically connecting the input end of the power supply interference suppression module 2 to the external AC power supply 1, the influence of transient overvoltage and high-frequency interference caused by lightning strikes, grounding, operation, etc. can be effectively eliminated, thereby ensuring the input power stability of the PLC control system 3.

[0038] The output end of the signal high frequency suppression module 4 is electrically connected to the signal input end of the PLC control system 3, and the input end of the signal high frequency suppression module 4 is electrically connected to the signal output end of the external device;

[0039] Specifically, the signal high-frequency suppression module 4 is a filter, specifically a low-pass filter.

[0040] In this embodiment, the output end of the signal high-frequency suppression module 4 is electrically connected to the signal input end of the PLC control system 3, and the low-pass filter can filter out the high-frequency components in the external input signal, and can effectively eliminate the interference introduced from the external signal line, so that the signal entering the PLC control system 3 is a filtered signal, which effectively improves the anti-interference ability of the PLC control system 3 and enhances the stability of the system.

[0041] The output end of the ground grid interference suppression module 5 is grounded, and the input end of the ground grid interference suppression module 5 is electrically connected to the output end row of the second terminal;

[0042] The input end of the second terminal block 7 is electrically connected to the ground wire of the device in the PLC control system 3;

[0043] Specifically, the ground grid interference suppression module 5 is a ground grid interference suppressor.

[0044] In this embodiment, by electrically connecting the input end of the ground grid interference suppression module 5 to the output end of the second terminal, the interference caused by the ground side and the interference caused by the ground potential back-strike overvoltage can be effectively eliminated, thereby avoiding system failures caused by ground grid interference and ensuring that the PLC control system 3 can operate stably in a complex electromagnetic environment.

[0045] The output end of the first terminal block 6 is grounded, and the input end of the first terminal block 6 is electrically connected to the device housing and the neutral line in the PLC control system 3 .

[0046] In this embodiment, by electrically connecting the input end of the first terminal block 6 to the device housing and the neutral line, good grounding of the device can be achieved, ensuring that the device will not be affected by external electromagnetic interference during operation.

[0047] Specifically, in this embodiment, the PLC control system 3 and the interference suppression device are both installed in a PLC control cabinet.

[0048] In this embodiment, the PLC control system 3 and the interference suppression device are installed in a PLC control cabinet, which facilitates operation and management.

[0049] The technical solutions in the embodiments of the present application include the following beneficial effects:

[0050] By setting up a power supply interference suppression module 2, this application can effectively eliminate the influence of transient overvoltage and high-frequency interference caused by lightning strikes, grounding, operation, etc., and ensure the input power stability of the PLC control system 3; by setting up a signal high-frequency suppression module 4, it can effectively eliminate the interference introduced from external signal lines; by setting up a ground grid interference suppression module 5, it can effectively eliminate the interference due to the grounding side and the interference of the ground potential counter-attack overvoltage.

[0051] The interference suppression device provided in this application can effectively improve the anti-interference capability of the PLC control system 3, ensure the stable operation of the PLC control system 3 in various complex electromagnetic environments, and improve the stability and reliability of the PLC control system 3.

[0052] Finally, it should be noted that, in this document, relationships such as first and second, etc., are used solely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms include, comprise, or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0054] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0055] The embodiments of the present application have been described above. The above description is illustrative and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. An interference suppression device for a PLC control system, for improving the anti-interference capability of the PLC control system (3), characterized by: The interference suppression device comprises: a power supply interference suppression module (2), a signal high-frequency suppression module (4), a ground network interference suppression module (5), a first terminal block (6) and a second terminal block (7); The input end of the power supply interference suppression module (2) is electrically connected to the external AC power supply (1), and the output end of the power supply interference suppression module (2) is electrically connected to the power supply module of the PLC control system (3); The output end of the signal high-frequency suppression module (4) is electrically connected to the signal input end of the PLC control system (3), and the input end of the signal high-frequency suppression module (4) is electrically connected to the signal output end of an external device; The output end of the ground grid interference suppression module (5) is grounded, and the input end of the ground grid interference suppression module (5) is electrically connected to the output end row of the second terminal; The input end of the second terminal block (7) is electrically connected to the ground wire of the equipment in the PLC control system (3); the output end of the first terminal block (6) is grounded, and the input end of the first terminal block (6) is electrically connected to the housing of the equipment in the PLC control system (3) and the neutral wire.

2. The interference suppression device according to claim 1, characterized in that: The power supply interference suppression module (2) is a power supply interference suppressor.

3. The interference suppression device according to claim 2, characterized in that: The signal high-frequency suppression module (4) is a filter, specifically a low-pass filter.

4. The interference suppression device according to claim 3, characterized in that: The ground grid interference suppression module (5) is a ground grid interference suppressor.

5. The interference suppression device according to claim 4, characterized in that: The PLC control system (3) and the interference suppression device are both installed in a PLC control cabinet.

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