PLC practical training output detection device

Abstract

The utility model relates to the technical field of control engineering, in particular to a PLC (Programmable Logic Controller) practical training output detection device, which comprises a circuit unit provided with at least one common end and at least one detection end, the common end is used for being connected with an output common end of a PLC, and the detection end is used for being connected with an opposite output end; the display unit is electrically connected with the circuit unit and is used for indicating the conduction state of the current detection end; according to the utility model, by means of the relation between the common end and the output end of the PLC output, the direct insertion type inspection device is designed, whether the inspection device is damaged is judged by judging whether the output end and the power supply port can form a loop, the overall structural design is simple and light, only a power line needs to be connected for wiring, the output port needing to be detected does not need to be wired, and the cost is reduced. Meanwhile, detection is fast, time and labor are saved when the device is plugged and unplugged, the device is light and portable in overall design and convenient to carry and use, and convenience and accuracy of equipment maintenance are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of control engineering, in particular to a PLC training output detection device. Background Art

[0002] With the continuous development of industrial automation, the society's demand for automation technical talents is becoming more extensive and the requirements are becoming higher and higher. Automation technical talents are not only required to have a solid theoretical foundation, but more importantly, they must have a good ability to solve practical engineering and technical problems. Programmable controller PLC has been widely used in industrial control sites due to its outstanding advantages, so PLC teaching has been increasingly valued by colleges and universities.

[0003] At present, the training device of PLC generally includes a machine, a PLC and an external control panel. The control panel has multiple jacks, which correspond one-to-one with the output end and the output end of the PLC to facilitate the connection of wires. For example, a PLC training platform disclosed in Chinese patent announcement number "CN214624049U" includes a test bench, a PLC module installed on the test bench, a touch screen, a leakage circuit breaker switch, a power module, a relay, a contactor, a forward and reverse motor, and line connection holes corresponding to the PLC module, the touch screen and the forward and reverse motor.

[0004] During the actual training process, due to unfamiliarity with the equipment and illegal operation, the output points of many devices have been damaged. Therefore, it is necessary to first test and repair multiple devices. Then replace the chips one by one. The existing detection method is to connect the corresponding output port with a wire and detect whether the current output is normal after programming. However, this method is cumbersome and time-consuming in wiring, and secondly, the damage of the wire also affects the accuracy of the detection. Based on this, in order to further improve the detection efficiency and accuracy of the PLC output point, we propose a PLC training output detection device. Utility Model Content

[0005] The utility model aims to solve the shortcomings of the prior art that the wiring is complicated and time-consuming, and the damage of the wire also affects the accuracy of the detection, and proposes a PLC training output detection device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] Design a PLC training output detection device, including:

[0008] A circuit unit having at least one common terminal and at least one detection terminal, wherein the common terminal is used to be connected to an output common terminal of the PLC, and the detection terminal is used to be connected to an opposite output terminal;

[0009] A display unit, electrically connected to the circuit unit, for indicating the current conduction state of the detection terminal;

[0010] and a power supply port, wherein the power supply port is electrically connected to the circuit unit and is used to provide loop current to the common terminal and the detection terminal.

[0011] Furthermore, it also includes a shell, and the circuit unit, the display unit and the power supply port are all arranged in the shell.

[0012] Furthermore, the circuit unit is a circuit board, and the common terminal, the detection terminal and the power supply port are all circuit modules formed on the circuit board.

[0013] Further, the power supply port includes a COM terminal and a POWER terminal, and the POWER terminal is connected to the common terminal line;

[0014] The COM terminal has at least one node on the circuit board, the detection terminal is a Y contact, and the display unit is electrically connected between the node of the COM terminal and the Y contact.

[0015] Furthermore, the display unit is an indicator light, and two electrodes of the indicator light are electrically connected to the COM terminal node and the Y contact respectively.

[0016] Furthermore, a reserved terminal is provided on the connection circuit between the POWER terminal and the common terminal.

[0017] Furthermore, the circuit unit is respectively connected with a common plug and a detection plug, the common plug is electrically connected to the common end, and the detection plug is circuit-conducting with the detection end.

[0018] Furthermore, the circuit unit is electrically provided with two connection sockets, and the two connection sockets are electrically connected to the COM terminal and the POWER terminal respectively.

[0019] Furthermore, the shell is a 3D printed plastic part, and most parts of the common plug and the detection plug penetrate and extend to the outside of the shell.

[0020] Furthermore, there is one common terminal and four detection terminals.

[0021] The utility model proposes a PLC training output detection device, which has the beneficial effect that: in the utility model, a plug-in inspection device is designed by means of the relationship between the common end and the output end of the PLC output, and whether the output end and the power supply port can form a loop to judge whether it is damaged. The overall structural design is simple and lightweight, and the wiring only needs to connect the power cord, and there is no need to wire the output port that needs to be detected, thereby reducing the detection workload. At the same time, the detection is fast, and plug-and-play saves time and effort. The overall design is lightweight and portable, easy to carry and use, and improves the convenience and accuracy of equipment maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the front view of the utility model;

[0023] Figure 2 It is a three-dimensional diagram of the utility model;

[0024] Figure 3 It is a cross-sectional view of the utility model;

[0025] Figure 4 This is a schematic diagram of the circuit unit structure of the utility model.

[0026] In the figure: 1. Circuit unit; 11. Common terminal; 12. Detection terminal; 13. Common plug; 14. Detection plug; 15. Connection socket; 2. Display unit; 3. Power supply port; 31. COM terminal; 32. POWER terminal; 33. Reserved terminal; 4. Casing. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] Reference Figure 1-4 An embodiment of the utility model discloses a PLC training output detection device, which is used to improve the detection efficiency of the output port of the current PLC device. Specifically, the device includes a circuit unit 1, which has at least one common terminal 11 and at least one detection terminal 12. The common terminal 11 is used to connect to the output common terminal of the PLC, and the detection terminal 12 is used to connect to the opposite output terminal;

[0029] Of course, the number of the common terminals 11 and the detection terminals 12 can be set according to the number of output terminals corresponding to each output common terminal of the PLC. Specifically, in this embodiment, the common terminal 11 is one and the detection terminals 12 are four. Technical personnel in the relevant field know that on the basis of this embodiment, the above-mentioned common terminals 11 can be set to two, and the corresponding detection terminals 12 are eight, and so on.

[0030] It also includes a display unit 2, which is electrically connected to the circuit unit 1 and is used to indicate the current on-state of the detection terminal 12. Through the setting of the display unit 2, the user can intuitively observe the on-off state of the currently detected output port to improve the detection efficiency;

[0031] and a power supply port 3 , wherein the power supply port 3 is electrically connected to the circuit unit 1 and is used for providing loop current to the common terminal 11 and the detection terminal 12 .

[0032] In some embodiments, the utility model further includes a housing 4, and the circuit unit 1, the display unit 2 and the power supply port 3 are all arranged in the housing 4. Specifically, in this embodiment, the housing 4 is a 3D printed plastic part.

[0033] Furthermore, the circuit unit 1 is a circuit board, and the common terminal 11, the detection terminal 12 and the power supply port 3 are all circuit modules formed on the circuit board.

[0034] On the basis of the above embodiment, in this embodiment, the power supply port 3 includes a COM terminal 31 and a POWER terminal 32, and the POWER terminal 32 is connected to the common terminal 11 by a line. Preferably, in this embodiment, the COM terminal 31 and the POWER terminal 32 are respectively connected to an external 24V and 0V power supply, so that the entire circuit forms a power supply loop;

[0035] The COM terminal 31 has at least one node on the circuit board, the detection terminal 12 is a Y contact, and the display unit 2 is electrically connected between the node of the COM terminal 31 and the Y contact. As shown in the figure, when multiple Y contacts are set, they can be distinguished by Y0, Y1, Y2 and Y3 respectively.

[0036] Furthermore, the display unit 2 in the embodiment of the utility model is an indicator light, and the two electrodes of the indicator light are electrically connected to the COM terminal 31 node and the Y contact respectively. It should be noted that in this embodiment, the working voltage of the indicator light should be adapted to the input voltage of the power supply port 3, so that when the circuit is turned on, the indicator light illuminates to indicate conduction.

[0037] In addition, in the embodiment of the utility model, a reserved terminal 33 is also provided on the connection circuit between the POWER terminal 32 and the common terminal 11, and an indicator light may also be connected between the node of the reserved terminal 33 and the COM terminal 31, and the indicator light is used to display the power-on status, that is, when the COM terminal 31 and the POWER terminal 32 are connected to the external power supply, the indicator light between the reserved terminal 33 and the COM terminal 31 lights up, indicating that the current input circuit is normal.

[0038] It should be noted that, in this embodiment, the circuit unit 1 is respectively connected to a common plug 13 and a detection plug 14, the common plug 13 is electrically connected to the common end 11, the detection plug 14 is circuit-conducting with the detection end 12, the common plug 13 and the detection plug 14 have the same structure and are compatible with the panel socket of the training PLC, and the end face of the shell 4 also has an avoidance hole, and at most parts of the common plug 13 and the detection plug 14 penetrate and extend to the outside of the shell 4, and the at most part is a large part, that is, it extends to the outside as much as possible, and the avoidance hole is used to provide a penetration position for the common plug 13 and the detection plug 14.

[0039] Of course, in this embodiment, the circuit unit 1 also has two electrically connected sockets 15, and the two connecting sockets 15 are electrically connected to the COM terminal 31 and the POWER terminal 32 respectively. Similarly, at least part of the connecting socket 15 should also protrude from the outside of the housing 4 to improve the convenience of wiring. It should be pointed out that in this embodiment, the electrical connection is achieved by plugging in the power socket. In other embodiments, if the power connector is a clamp, the above-mentioned connecting socket 15 can also be set to a protruding columnar structure to facilitate connection with the clamp.

[0040] When the device is specifically produced, the circuit board is first designed according to the circuit layout. After the design is completed, the required parts are welded and fixed. Thereafter, a shell 4 can be printed using 3D printing technology, and the above-mentioned circuit board is installed inside the shell 4 to complete the assembly.

[0041] When in use, align the common plug 13 of the device with the common output terminal on the PLC external panel, and similarly align the detection plug 14 with the output terminal on the PLC external panel and insert it, and connect the power supply to the connection socket 15. After that, the PLC can be loaded with a program to make all its output points conductive. Since the POWER terminal 32 provides voltage for the PLC common output terminal, the output voltage of all output terminals of the current PLC common output terminal is the same as the voltage of the common output terminal. Therefore, if the current output terminal is normal, the Y contact has a voltage output, and cooperates with the COM terminal 31 to form a loop, so the corresponding indicator light between the two will light up, indicating that the current output terminal is normal.

[0042] Similarly, if the indicator light corresponding to the current output end is not on, it means that the corresponding output end is damaged and needs to be repaired and replaced. This process can be repeated without the need for wiring, greatly improving detection efficiency.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A PLC training output detection device, characterized in that: include: A circuit unit (1) having at least one common terminal (11) and at least one detection terminal (12), wherein the common terminal (11) is used to be connected to an output common terminal of a PLC, and the detection terminal (12) is used to be connected to an opposite output terminal; A display unit (2) electrically connected to the circuit unit (1) and used to indicate the current conduction state of the detection terminal (12); and a power supply port (3), wherein the power supply port (3) is electrically connected to the circuit unit (1) and is used to provide loop current to the common terminal (11) and the detection terminal (12).

2. A PLC training output detection device according to claim 1, characterized in that: It also comprises a housing (4), wherein the circuit unit (1), the display unit (2) and the power supply port (3) are all arranged in the housing (4).

3. A PLC training output detection device according to claim 2, characterized in that: The circuit unit (1) is a circuit board, and the common terminal (11), the detection terminal (12) and the power supply port (3) are all circuit modules formed on the circuit board.

4. A PLC training output detection device according to claim 3, characterized in that: The power supply port (3) comprises a COM terminal (31) and a POWER terminal (32), and the POWER terminal (32) is connected to the common terminal (11) by a line; The COM terminal (31) has at least one node on the circuit board, the detection terminal (12) is a Y contact, and the display unit (2) is electrically connected between the node of the COM terminal (31) and the Y contact.

5. A PLC training output detection device according to claim 4, characterized in that: The display unit (2) is an indicator light, and two electrodes of the indicator light are electrically connected to the COM terminal (31) node and the Y contact respectively.

6. A PLC training output detection device according to claim 4, characterized in that: A reserved terminal (33) is also provided on the connection circuit between the POWER terminal (32) and the common terminal (11).

7. A PLC training output detection device according to any one of claims 2 to 6, characterized in that: The circuit unit (1) is respectively connected to a common plug (13) and a detection plug (14); the common plug (13) is electrically connected to the common end (11); and the detection plug (14) is electrically connected to the detection end (12).

8. A PLC training output detection device according to any one of claims 4 to 6, characterized in that: The circuit unit (1) is also electrically provided with two connection sockets (15), and the two connection sockets (15) are electrically connected to the COM terminal (31) and the POWER terminal (32) respectively.

9. A PLC training output detection device according to claim 7, characterized in that: The housing (4) is a 3D printed plastic part, and most parts of the common plug (13) and the detection plug (14) penetrate through and extend to the outside of the housing (4).

10. A PLC training output detection device according to claim 1, characterized in that: There is one common terminal (11) and four detection terminals (12).

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