PLC module with alarm function

Abstract

This utility model relates to the field of PLC control technology, and in particular to a PLC module with an alarm function. It includes a base plate, on the top of which a housing is bolted. A communication interface module, a power supply interface module, and a signal input interface module are embedded in the left side of the housing. An indicator light is embedded in the front of the top of the housing, and a buzzer is bolted to the center of the top of the housing cavity. The central processing unit compares the monitored signal with a preset threshold. Based on the comparison result, the indicator light displays a different color. When the threshold is exceeded, the alarm trigger unit receives a high-level signal from the central processing unit and drives the buzzer to sound an alarm. This integrates the alarm unit with the PLC module, eliminating the need for additional wiring and installation space, reducing construction costs. Furthermore, the alarm trigger unit is directly electrically connected to the central processing unit, reducing signal transmission links and resulting in faster alarm response.

Description

Technical Field

[0001] This utility model relates to the field of PLC control technology, specifically a PLC module with alarm function. Background Technology

[0002] A PLC module, also known as a programmable logic controller module, is the core component of a PLC system and a key hardware unit for realizing industrial automation control. It enables functions such as logic control, data acquisition, and instruction execution for industrial equipment and production lines through programming, and is widely used in manufacturing, energy, transportation, chemical and other fields.

[0003] A search revealed that the announcement number is CN217644028U, and the name is a PLC control module, which includes a control module body. Multiple sets of capacitors are set on the top surface of the control module body. Through research and analysis, it was found that although this device can protect the capacitors on the surface of the control module body and prevent the connecting wires from loosening and falling off, thereby improving the stability of the signal transmission of the control module body, it still has the following defects to a certain extent.

[0004] For example, the PLC module itself does not have an independent alarm function. If an alarm is required, an external alarm device must be connected, and the alarm device must be controlled through the PLC's output interface. This requires additional installation space for the external device and separate wiring, increasing construction complexity and cost. Moreover, the alarm signal must be controlled by the external circuit of the PLC, which is prone to alarm delay or failure due to line faults. Due to the lack of integrated design, alarm parameters cannot be displayed synchronously, resulting in low work efficiency. In order to solve the above technical problems, we have designed a PLC module with alarm function. Utility Model Content

[0005] The purpose of this utility model is to provide a PLC module with alarm function, which has the advantages of integrated alarm function, compact structure, high degree of integration, fast alarm response, and improved work efficiency. It solves the problems of complex wiring, alarm delay and low fault location efficiency caused by the need for external alarm devices in existing PLC modules.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a PLC module with alarm function, including a base plate, a housing being bolted to the top of the base plate, a communication interface module, a power supply interface module, and a signal input interface module being embedded in the left side of the housing, an indicator light being embedded in the front side of the top of the housing, a buzzer being bolted to the middle of the top of the housing cavity, a display module being embedded in the rear side of the top of the housing, and a main control mechanism being bolted to the top of the base plate. The main control mechanism includes a circuit board, and a central processing unit, an alarm triggering unit, and a storage unit are respectively mounted on the top of the circuit board.

[0007] Preferably, a loudspeaker grille is embedded in the left side of the top of the housing cavity, and the output end of the signal input interface module is electrically connected to the central processing unit.

[0008] Preferably, the output terminal of the central processing unit is electrically connected to the alarm triggering unit, and the output terminal of the alarm triggering unit is electrically connected to the buzzer.

[0009] Preferably, the output terminal of the central processing unit is electrically connected to an indicator light and a display module, respectively, and the indicator light is a multi-color LED light.

[0010] Preferably, terminal blocks are fixedly installed on both the front and rear sides of the top of the circuit board, and the output terminal of the central processing unit is bidirectionally electrically connected to the terminal blocks.

[0011] Preferably, the output of the central processing unit is electrically connected to the storage unit, and a backup power supply unit is bolted to the rear side of the housing cavity.

[0012] Preferably, a relay interface unit is embedded in the top left side of the housing, the output terminal of the alarm trigger unit is electrically connected to the relay interface unit, and a reset button is embedded in the left side of the rear top of the housing.

[0013] Preferably, the input end of the communication interface module is bidirectionally electrically connected to the central processing unit, positioning base plates are fixedly connected to the four corners of the base plate, and a limit frame is fixedly connected to the top of the base plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The central processing unit compares the monitored signal with the preset threshold. Based on the comparison result, the indicator light displays different colors. When the threshold is exceeded, the alarm trigger unit receives a high level signal from the central processing unit and drives the buzzer to sound an alarm. This integrates the alarm unit with the PLC module, eliminating the need for additional wiring and installation space, thus reducing construction costs. At the same time, the alarm trigger unit is directly electrically connected to the central processing unit, reducing signal transmission links and resulting in faster alarm response.

[0015] 2. After an alarm is triggered, the indicator light will illuminate, and the display module will simultaneously display the alarm type and parameters. This allows maintenance personnel to directly obtain information through the alarm content on the display module, improving location efficiency. Attached Figure Description

[0016] Figure 1 This is an axonometric view of the structure of this utility model; Figure 2 This is a top axonometric view of the base plate of this utility model; Figure 3 This is a right-side bottom-view axonometric view of the housing of this utility model; Figure 4 This is a system schematic diagram of the structure of this utility model.

[0017] In the diagram: 1. Base plate; 2. Housing; 3. Indicator light; 4. Signal input interface module; 5. Power supply interface module; 6. Communication interface module; 7. Amplifier grille; 8. Reset button; 9. Display module; 10. Limit frame; 11. Main control mechanism; 12. Circuit board; 13. Alarm trigger unit; 14. Terminal block; 15. Central processing unit; 16. Storage unit; 17. Backup power unit; 18. Buzzer; 19. Relay interface unit; 20. Positioning base plate. Detailed Implementation

[0018] Please see Figures 1-4 A PLC module with alarm function includes a base plate 1. A housing 2 is bolted to the top of the base plate 1. A communication interface module 6, a power supply interface module 5, and a signal input interface module 4 are embedded in the left side of the housing 2. The communication interface module 6 can use an RS485 interface for communication with a host computer and transmission of alarm data. The power supply interface module 5 can use a DC24V interface for connection to an external power supply to power the entire module. An indicator light 3 is embedded in the front of the top of the housing 2. A buzzer 18 is bolted to the center of the top of the inner cavity of the housing 2. A display module is embedded in the rear of the top of the housing 2. Block 9, display module 9 is used to display alarm parameters (such as current voltage value, temperature value). The main control mechanism 11 is installed on the top of the base plate 1 by bolts. The main control mechanism 11 includes a circuit board 12. The top of the circuit board 12 is respectively equipped with a central processing unit 15, an alarm triggering unit 13 and a storage unit 16. The central processing unit 15 is the main control chip, integrated on the circuit board 12, used to receive the monitoring signal of the signal input interface module 4 and compare it with the preset threshold in the storage unit 16. The storage unit 16 can use an EEPROM chip to store threshold parameters and supports the modification of the threshold through the communication interface module 6. Please see Figure 1 and Figure 2A loudspeaker mesh 7 is embedded in the left side of the top of the inner cavity of the housing 2. By setting the loudspeaker mesh 7, the alarm sound can be easily transmitted. The output end of the signal input interface module 4 is electrically connected to the central processing unit 15. Please see Figure 1 and Figure 2 The output terminal of the central processing unit 15 is electrically connected to the alarm triggering unit 13, and the output terminal of the alarm triggering unit 13 is electrically connected to the buzzer 18. Please see Figure 1 and Figure 2 The output terminals of the central processing unit 15 are electrically connected to the indicator light 3 and the display module 9 respectively. The indicator light 3 is a multi-color LED light, corresponding to different alarm types (such as overvoltage alarm, overcurrent alarm, and temperature over-limit alarm). Please see Figure 2 Terminal blocks 14 are fixedly installed on both the front and rear sides of the top of the circuit board 12. By setting the terminal blocks 14, it is easy for the internal components of this PLC module to complete the wiring with the central processing unit 15. The output terminal of the central processing unit 15 is bidirectionally electrically connected to the terminal blocks 14. Please see Figure 2 and Figure 3 The output of the central processing unit 15 is electrically connected to the storage unit 16. A backup power unit 17 is installed on the rear side of the inner cavity of the housing 2 by bolts. The backup power unit 17 can be a lithium battery, which is converted to DC24V through a boost circuit and electrically connected to the power supply interface module 5 and the buzzer 18. When the external power is interrupted, the lithium battery automatically supplies power to ensure that the buzzer 18 continues to work. Please see Figure 1 A relay interface unit 19 is embedded in the top left side of the housing 2. The relay interface unit 19 can be connected to an external alarm bell. When the buzzer 18 is working, the relay interface unit 19 is activated to trigger the external alarm bell, enhancing versatility. The output terminal of the alarm trigger unit 13 is electrically connected to the relay interface unit 19. A reset button 8 is embedded in the left side of the rear top of the housing 2. Please see Figure 1 and Figure 2 The input end of the communication interface module 6 is bidirectionally electrically connected to the central processing unit 15. The four corners of the base plate 1 are fixedly connected with positioning base plates 20. By setting the positioning base plates 20, it is easy to fix and install this PLC module. The top of the base plate 1 is fixedly connected with a limit frame 10. By setting the limit frame 10, the housing 2 can be fitted on its surface and fixed with bolts.

[0019] During use, the power supply interface module 5 supplies power to this PLC module, while the backup power supply unit 17 is in a charging state. Various external sensors, such as temperature and pressure sensors, are connected to the signal input interface module 4 and send real-time monitoring signals to the central processing unit 15. The central processing unit 15 compares the monitoring signals with the preset thresholds in the storage unit 16. According to the threshold comparison, the indicator light 3 displays different colors. When the threshold is exceeded, the alarm trigger unit 13 receives a high-level signal from the central processing unit 15 and drives the buzzer 18 to sound an alarm. After the maintenance personnel troubleshoot the fault, they press the reset button 8, the alarm trigger unit 13 outputs a low level, the alarm stops, and the indicator light 3 returns to green.

[0020] In summary, this PLC module with alarm function, through the coordinated use of base plate 1, housing 2, indicator light 3, signal input interface module 4, display module 9, circuit board 12, alarm trigger unit 13, central processing unit 15, storage unit 16 and buzzer 18, solves the problems of complex wiring, alarm delay and low fault location efficiency caused by the need for external alarm devices in existing PLC modules.

Claims

1. A PLC module with alarm function, comprising a base plate (1), characterized in that: The top of the base plate (1) is bolted to a housing (2). The left side of the housing (2) is embedded with a communication interface module (6), a power supply interface module (5) and a signal input interface module (4). An indicator light (3) is embedded in the front side of the top of the housing (2). A buzzer (18) is bolted to the middle of the top of the inner cavity of the housing (2). A display module (9) is embedded in the rear side of the top of the housing (2). The top of the base plate (1) is bolted to a main control mechanism (11). The main control mechanism (11) includes a circuit board (12). The top of the circuit board (12) is mounted with a central processing unit (15), an alarm triggering unit (13) and a storage unit (16).

2. A PLC module with alarm function according to claim 1, characterized in that: A loudspeaker mesh plate (7) is embedded in the left side of the top of the inner cavity of the housing (2), and the output end of the signal input interface module (4) is electrically connected to the central processing unit (15).

3. A PLC module with alarm function according to claim 1, characterized in that: The output of the central processing unit (15) is electrically connected to the alarm triggering unit (13), and the output of the alarm triggering unit (13) is electrically connected to the buzzer (18).

4. A PLC module with alarm function according to claim 1, characterized in that: The output terminal of the central processing unit (15) is electrically connected to the indicator light (3) and the display module (9), respectively. The indicator light (3) is a multi-color LED light.

5. A PLC module with alarm function according to claim 1, characterized in that: Terminal blocks (14) are fixedly installed on both the front and rear sides of the top of the circuit board (12), and the output end of the central processing unit (15) is bidirectionally electrically connected to the terminal blocks (14).

6. A PLC module with alarm function according to claim 1, characterized in that: The output of the central processing unit (15) is electrically connected to the storage unit (16), and a backup power supply unit (17) is installed on the rear side of the inner cavity of the housing (2) by bolts.

7. A PLC module with alarm function according to claim 1, characterized in that: A relay interface unit (19) is embedded in the top left side of the housing (2). The output end of the alarm trigger unit (13) is electrically connected to the relay interface unit (19). A reset button (8) is embedded in the left side of the rear top of the housing (2).

8. A PLC module with alarm function according to claim 1, characterized in that: The input end of the communication interface module (6) is bidirectionally electrically connected to the central processing unit (15). The four corners of the base plate (1) are fixedly connected with positioning base plates (20), and the top of the base plate (1) is fixedly connected with a limit frame (10).

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