Bus type pull cord button box control circuit

Abstract

The utility model relates to industrial control equipment technical field, concretely provides a bus type pull rope button box control circuit, including main control module, communication module, power module, input module, output module, and main control module adopts a microcontroller IC1, and communication module includes network socket RJ45, is equipped with first network mouth RX1 TX1 and second network mouth RX2 TX2 on network socket RJ45, and power module includes DC DC conversion chip U15 and power management chip, and input module includes pull rope trigger assembly and button trigger assembly, the utility model creatively merges pull rope trigger mechanism into bus type control framework, through many sensor cooperation determination, hardware latch output, multistage power management, communication isolation etc. Technical means, the reliability, security and maintainability of bus type pull rope button box under the industrial field environment have been improved significantly, have stronger practical value and popularization prospect.

Description

Technical Field

[0001] This utility model relates to the field of industrial control equipment technology, specifically to a bus-type pull-cord button box control circuit. Background Technology

[0002] A bus-type push-button box is a modern control device that uses industrial bus communication technology for data transmission. It integrates traditionally complex point-to-point wiring components such as buttons and indicator lights into a modular device with a bus interface and intelligent processing circuitry. This device, acting as a network slave, can directly exchange stable and efficient real-time data with a PLC.

[0003] In traditional technology, push-button boxes used in industrial control sites typically employ mechanical triggering, such as mechanical limit switches or buttons. Operators must operate these mechanical limit switches or buttons to achieve the corresponding control functions. However, in safety protection scenarios for large continuous production equipment such as conveyor belts and large machine tools, operators cannot quickly and conveniently trigger emergency stop signals, thus failing to meet the safety protection requirements of push-button boxes in such scenarios. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a bus-type pull cord button box control circuit to solve the problem of inconvenient operation caused by the mechanical triggering method used in the prior art to realize the control function.

[0005] To achieve the above and other related objectives, this utility model provides a bus-type pull cord button box control circuit, comprising: The main control module uses a microcontroller IC1 for signal processing and logic control. The communication module includes a network cable socket RJ45, which has a first network port RX1 / TX1 and a second network port RX2 / TX2 for data interaction with the upper PLC master station. The power module includes a DC-DC converter chip U15 and a power management chip. The DC-DC converter chip U15 is used to convert a 24V input voltage into a 3.3V power supply voltage, and the power management chip is used to convert the 3.3V power supply voltage into a supply voltage. The input module includes a pull-cord trigger component and a button trigger component, used to acquire on-site control signals; The output module uses a relay U14 and a relay driver U9. The input terminal of the relay driver U9 is connected to the microcontroller IC1, and the output terminal is connected to the relay U14. The relay U14 outputs control signals to the outside.

[0006] In one embodiment of this utility model, the pull-cord triggering component employs multiple contactless pull-cord triggering Hall switches, AND gate chips, and trigger chips. The multiple contactless pull-cord triggering Hall switches are installed at different positions of the same workstation in the industrial control site, and the output terminals of the multiple contactless pull-cord triggering Hall switches are all connected to the input terminals of the AND gate chips, and the output terminals of the AND gate chips are connected to the microcontroller IC1.

[0007] In one embodiment of this utility model, the button triggering component adopts multiple touch buttons, which are installed at different positions of the same workstation in the industrial control site; all multiple touch buttons are connected to relay U14.

[0008] In one embodiment of the present invention, the communication module further includes a first isolation transformer CT1A and a second isolation transformer CT1B. The first isolation transformer CT1A is connected to the first network port RX1 / TX1, and the second isolation transformer CT1B is connected to the second network port RX2 / TX2.

[0009] In one embodiment of the present invention, the power management chip includes a first power management chip U3 and a second power management chip U4. The first power management chip U3 is used to convert a 3.3V power supply voltage into a 1.0V power supply voltage, and the second power management chip U4 is used to convert a 3.3V power supply voltage into a 1.5V power supply voltage.

[0010] In one embodiment of the present invention, the input terminal of the relay driver U9 is connected to a latch, and the output module is connected to the GPIO pin of the microcontroller IC1 through the latch.

[0011] In one embodiment of the present invention, the communication module further includes a status indicator assembly, which employs multiple NPN transistors. The base of the NPN transistor is connected to the microcontroller IC1, the collector is connected to the network cable socket RJ45, and the emitter is grounded.

[0012] As described above, the bus-type pull cord button box control circuit of this utility model has the following beneficial effects: This invention creatively integrates a pull-rope triggering function while retaining the mechanical triggering mechanism. The pull-rope triggering function is achieved through a contactless Hall switch, an AND gate chip, a trigger chip, and a microcontroller IC1. This design allows multiple Hall sensors to be flexibly and dispersedly installed at different locations along the production line of large continuous production equipment. By simply connecting the Hall switch to a pull rope, workers can conveniently pull the rope to trigger the signal from any installation point near their workstation. This effectively solves the problem of traditional solutions relying on fixed trigger points, which cannot quickly and conveniently trigger emergency stop signals. It makes the safety protection network easier to customize and expand according to the actual production layout, significantly reducing wiring costs and installation complexity, and meeting the safety protection requirements of the button box in large continuous production equipment scenarios. Furthermore, this invention uses a combination of a DC-DC conversion chip and a multi-channel power management chip in the power module, achieving efficient and stable voltage conversion from 24V industrial power to 3.3V, 1.0V, and 1.5V. This not only adapts to a wide voltage input range but also provides clean power to devices with different voltage requirements, such as the microcontroller IC1, bus PHY chip, and Hall sensors, improving the overall system's adaptability to power fluctuations and long-term operational stability. Attached Figure Description

[0013] Figure 1 The diagram shown is a circuit schematic of this utility model.

[0014] Figure 2 Displayed as Figure 1 An enlarged view of the main control module.

[0015] Figure 3 Displayed as Figure 1 An enlarged view of the communication module.

[0016] Figure 4 Displayed as Figure 1 Enlarged view of the power supply module.

[0017] Figure 5 Displayed as Figure 1 Enlarged view of the pull-cord trigger component.

[0018] Figure 6 Displayed as Figure 1 A magnified view of the button-triggered component.

[0019] Figure 7 Displayed as Figure 1 A magnified view of the output module.

[0020] Component designation explanation Main control module 1; communication module 2; status indicator assembly 21; power module 3; input module 4; pull cord trigger assembly 41; button trigger assembly 42; output module 5. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0022] Please see Figures 1 to 7 It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should fall within the scope of the technical content disclosed in this utility model.

[0023] Please see Figures 1-7 This utility model provides a bus-type pull cord button box control circuit, including a main control module 1, a communication module 2, a power supply module 3, an input module 4, and an output module 5. The main control module 1 uses a microcontroller IC1 for signal processing and logic control. The main control module 1, communication module 2, power supply module 3, input module 4, output module 5, and other peripheral circuits are all electrically connected through control board wiring.

[0024] Please see Figure 3 The communication module 2 includes a network cable socket RJ45, with a first network port RX1 / TX1 and a second network port RX2 / TX2 for data interaction with the upper PLC master station. The communication module 2 also includes a first isolation transformer CT1A and a second isolation transformer CT1B. The first isolation transformer CT1A is connected to the first network port RX1 / TX1, and the second isolation transformer CT1B is connected to the second network port RX2 / TX2. The communication module 2 employs a dual-network port design with dual isolation transformers to effectively suppress common-mode interference and ground loop interference, improving the reliability of bus communication and electromagnetic interference resistance, and ensuring the real-time and accurate data interaction with the PLC master station. The communication module 2 also includes a status indicator assembly 21, which uses multiple NPN transistors. The base of the NPN transistors is connected to the microcontroller IC1, the collector is connected to the network cable socket RJ45, and the emitter is grounded. The status indicator assembly 21 is designed to display the real-time operating status of network communication, power supply, input, and output, facilitating on-site inspection and fault diagnosis.

[0025] Please see Figure 4The power module 3 includes a DC-DC converter chip U15 and a power management chip. The DC-DC converter chip U15 converts the 24V input voltage into a 3.3V power supply voltage, and the power management chip converts the 3.3V power supply voltage into a supply voltage. The power management chip includes a first power management chip U3 and a second power management chip U4. The first power management chip U3 converts the 3.3V power supply voltage into a 1.0V supply voltage, and the second power management chip U4 converts the 3.3V power supply voltage into a 1.5V supply voltage. This invention uses a combination of a DC-DC converter chip and multiple power management chips in the power module, achieving efficient and stable voltage conversion from 24V industrial power to 3.3V, 1.0V, and 1.5V. It can not only adapt to a wide voltage input, but also provide clean power to devices with different voltage requirements such as microcontroller IC1, bus PHY chip, and Hall sensor, improving the adaptability of the entire system to power fluctuations and long-term working stability.

[0026] Please see Figure 1 , Figure 5 , Figure 6The input module 4 includes a pull-cord trigger component 41 and a button trigger component 42 for acquiring field control signals. Specifically, the pull-cord trigger component 41 employs multiple contactless pull-cord trigger Hall switches, AND gate chips, and trigger chips. These multiple contactless pull-cord trigger Hall switches are installed at different locations within the same workstation in the industrial control field, and the outputs of all multiple contactless pull-cord trigger Hall switches are connected to the inputs of the AND gate chips. The outputs of the AND gate chips are connected to the microcontroller IC1. Specifically, this embodiment uses three Hall switches U7, U11, and U13, two AND gate chips U8 and U12, two touch chips U17 and U18, and a touch integrated module U5. Hall switch U7 is installed on the left side of the workstation (DI_L), Hall switch U11 is installed on the right side of the workstation (DI_R), and Hall switch U13 is installed on the lower side of the workstation (DI_D). The output terminals of Hall switches U7 and U11 are connected to AND gate chip U8. The output terminals of AND gate chip U8 and Hall switch U13 are connected to AND gate chip U12. The output terminals of AND gate chip U12, touch chip U17, and touch chip U18 are all connected to touch integrated module U5. Touch integrated module U5 is connected to microcontroller IC1. It receives the pull rope signal through Hall switches U7, U11, and U13 and transmits it to microcontroller IC1. Microcontroller IC1 controls output module 5 to output control signals. The button triggering component 42 employs multiple touch buttons, which are installed at different locations within the same workstation in the industrial control environment. Each touch button is connected to a relay U14. This invention creatively integrates a pull-rope triggering function while retaining the mechanical triggering capability. This function is achieved through a contactless Hall effect switch, an AND gate chip, a trigger chip, and a microcontroller IC1. This design allows multiple Hall effect sensors to be flexibly and dispersed at different locations along the production line of a large continuous production line. By simply connecting the Hall effect switch to a pull rope, workers can conveniently pull the rope to trigger the signal from any installation point near their workstation. This effectively solves the problem of traditional solutions relying on fixed trigger points, which cannot quickly and conveniently trigger emergency stop signals. It makes the safety protection network easier to customize and expand according to the actual production layout, significantly reducing wiring costs and installation complexity, and meeting the safety protection requirements of the button box in large continuous production equipment scenarios.

[0027] Please see Figure 7The output module 5 employs a relay U14 and a relay driver U9. The input terminal of the relay driver U9 is connected to a latch. The output module 5 is connected to the GPIO pin of the microcontroller IC1 through the latch, and outputs control signals to the outside through the relay U14. The output module 5 locks the instructions of the microcontroller IC1 through the latch, and then drives the relay U14 through the relay driver U9. This hardware holding mechanism ensures that the output state is not changed due to software crashes or I / O port interference. At the same time, the output module 5, together with the independent isolation transformer at the network port of the communication module 2 and the multi-stage regulated power supply architecture of the power supply module 3, jointly ensures the reliability of bus communication and the purity and stability of system power supply in harsh industrial electromagnetic environments, enabling the button box to work stably in complex environments.

[0028] In summary, this invention creatively integrates a pull-cord triggering mechanism into a bus-type control architecture and employs dual network ports with dual isolation transformers to effectively suppress common-mode interference and ground loop interference, thereby improving the reliability of bus communication and its anti-electromagnetic interference capability, and ensuring the real-time and accurate data interaction with the PLC master station. Through multi-sensor collaborative judgment, hardware latched output, multi-level power management, and communication isolation, this invention significantly improves the reliability, safety, and maintainability of the bus-type pull-cord button box in industrial environments, demonstrating strong practical value and promising prospects for widespread application. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and possesses high industrial utilization value.

[0029] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A bus-type pull-cord button box control circuit, characterized in that, include: The main control module (1) uses a microcontroller IC1 for signal processing and logic control. Communication module (2), the communication module (2) includes a network cable socket RJ45, the network cable socket RJ45 is provided with a first network port RX1 / TX1 and a second network port RX2 / TX2, which are used to interact with the upper PLC master station for data; The power module (3) includes a DC-DC converter chip U15 and a power management chip. The DC-DC converter chip U15 is used to convert the 24V input voltage into a 3.3V power supply voltage, and the power management chip is used to convert the 3.3V power supply voltage into a supply voltage. The input module (4) includes a pull-cord trigger component (41) and a button trigger component (42) for acquiring on-site control signals; The output module (5) uses a relay U14 and a relay driver U9. The input terminal of the relay driver U9 is connected to the microcontroller IC1, and the output terminal is connected to the relay U14. The relay U14 outputs control signals to the outside.

2. The bus-type pull-cord button box control circuit according to claim 1, characterized in that: The pull-cord triggering assembly (41) uses multiple contactless pull-cord triggering Hall switches, AND gate chips, and trigger chips. Multiple contactless pull-cord triggering Hall switches are installed at different positions of the same workstation in the industrial control site, and the output terminals of multiple contactless pull-cord triggering Hall switches are all connected to the input terminals of the AND gate chips, and the output terminals of the AND gate chips are connected to the microcontroller IC1.

3. The bus-type pull-cord button box control circuit according to claim 2, characterized in that: The button triggering component (42) uses multiple touch buttons, which are installed at different positions of the same workstation in the industrial control site; all the touch buttons are connected to relay U14.

4. The bus-type pull cord button box control circuit according to claim 1, characterized in that: The communication module (2) also includes a first isolation transformer CT1A and a second isolation transformer CT1B. The first isolation transformer CT1A is connected to the first network port RX1 / TX1, and the second isolation transformer CT1B is connected to the second network port RX2 / TX2.

5. The bus-type pull cord button box control circuit according to claim 1, characterized in that: The power management chip includes a first power management chip U3 and a second power management chip U4. The first power management chip U3 is used to convert the 3.3V power supply voltage to a 1.0V supply voltage, and the second power management chip U4 is used to convert the 3.3V power supply voltage to a 1.5V supply voltage.

6. The bus-type pull cord button box control circuit according to claim 1, characterized in that: The input terminal of the relay driver U9 is connected to a latch, and the output module (5) is connected to the GPIO pin of the microcontroller IC1 through the latch.

7. The bus-type pull cord button box control circuit according to claim 1, characterized in that: The communication module (2) also includes a status indicator assembly (21), which uses multiple NPN transistors. The base of the NPN transistor is connected to the microcontroller IC1, the collector is connected to the network cable socket RJ45, and the emitter is grounded.

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