Isolating communication security barrier device

Abstract

The application relates to the technical field of electrical safety equipment, and discloses an isolation type communication safety barrier device which comprises a shell assembly and a function assembly, the function assembly comprises a circuit board, a plurality of wiring terminals, a power conversion module, a power isolation module, a signal isolation module and a fault self-diagnosis module, the wiring terminals comprise first communication terminals and second communication terminals, the first communication terminals and the second communication terminals are RS485 communication terminals, the signal isolation module comprises a digital isolator and is used for isolating RS485 communication signals between a safe side and a dangerous side, the fault self-diagnosis module comprises a detection unit, a fault output unit and an alarm unit, the fault output unit generates a fault code when a working state does not match a corresponding preset state, and the alarm unit is used for generating an alarm prompt according to the fault code. The technical scheme of the application is beneficial to improving the power and signal isolation performance between the safe side and the dangerous side, realizing reliable isolation transmission and bidirectional communication of RS485 communication signals, and rapidly warning faults.

Description

Technical Field

[0001] This invention relates to the field of electrical safety equipment technology, and in particular to an isolated communication safety barrier device. Background Technology

[0002] In hazardous industrial environments such as petroleum, chemical, and coal mines, the electrical signal transmission and power distribution between safe and hazardous areas must be strictly controlled to avoid explosion risks. Current technologies suffer from poor signal transmission performance between hazardous and safe areas, failing to achieve isolated transmission and bidirectional communication of RS485 signals. This is detrimental to the real-time requirements of industrial automation, exhibits weak anti-interference capabilities, struggles to withstand surges and common-mode interference in complex electromagnetic environments, makes fault diagnosis difficult, and lacks real-time diagnostic and early warning functions. Summary of the Invention

[0003] This invention provides an isolated communication safety barrier device, which can improve the power and signal isolation performance between the safe side and the dangerous side, realize reliable isolated transmission and bidirectional communication of RS485 communication signals, realize rapid early warning of functional module failures, improve system operation and maintenance efficiency, and has strong anti-interference ability, which is conducive to resisting surges and common-mode interference in complex electromagnetic environments.

[0004] This invention provides an isolated communication safety barrier device, including a housing assembly and functional components. The functional components are housed within the housing assembly and include: a circuit board, multiple terminal blocks, a power conversion module, a power isolation module, a signal isolation module, and a fault self-diagnosis module. The multiple terminal blocks are electrically connected to the circuit board and include an input power terminal, an output power terminal, a first communication terminal, and a second communication terminal. The input power terminal and the first communication terminal are communicatively connected to the power supply and communication equipment on the safe side, while the output power terminal and the second communication terminal are communicatively connected to the power supply and communication equipment on the hazardous side that require isolated power supply and communication. The first communication terminal and the second communication terminal are RS485 communication terminals. The power conversion module is electrically connected to the circuit board and includes a first conversion module and a second conversion module. The first conversion module is electrically connected to the input power terminal, and the second conversion module is electrically connected to the output power terminal. Both the first and second conversion modules include a protection circuit unit and a common-mode filter circuit unit. The protection circuit unit limits the peak voltage and current in the circuit, and the common-mode filter circuit unit suppresses electromagnetic interference in the circuit. The power isolation module is electrically connected between the first conversion module and the second conversion module. The power isolation module includes a power isolation transformer for isolating the power supply between the safe side and the dangerous side. The signal isolation module is electrically connected between the first communication terminal and the second communication terminal. The signal isolation module includes a digital isolator for isolating the RS485 communication signal between the safe side and the dangerous side. The fault self-diagnosis module includes a detection unit, a fault output unit, and an alarm unit. The detection unit detects the operating status of the power isolation module, the signal isolation module, and the power conversion module. When the detection unit detects that the operating status of the power isolation module, and / or the signal isolation module, and / or the power conversion module does not match the corresponding preset status, the fault output unit generates a fault code corresponding to the abnormal operating status, and the alarm unit generates a corresponding alarm message based on the corresponding fault code.

[0005] This invention provides a power conversion module, a power isolation module, a signal isolation module, and a fault self-diagnosis module within the functional components of an isolated communication safety barrier device. The power isolation module includes a power isolation transformer for isolating the power supply between the safe and hazardous sides. The signal isolation module includes a digital isolator for isolating the RS485 communication signal between the safe and hazardous sides. This improves the power and signal isolation performance between the safe and hazardous sides, enabling reliable isolated transmission and bidirectional communication of RS485 communication signals, and providing reliable protection for signal transmission between the safe and hazardous sides. The power conversion module includes a protection circuit unit and a common-mode filter circuit unit. The protection circuit unit limits peak voltage and current in the circuit, while the common-mode filter circuit unit suppresses electromagnetic interference in the circuit. This provides strong anti-interference capability, effectively resisting surges and common-mode interference in complex electromagnetic environments, and is suitable for complex industrial environments. The fault self-diagnosis module includes a detection unit, a fault output unit, and an alarm unit. The detection unit detects the operating status of the power isolation module, signal isolation module, and power conversion module. When the detection unit detects that the operating status of the power isolation module, and / or signal isolation module, and / or power conversion module does not match the corresponding preset status, the fault output unit generates a fault code corresponding to the abnormal operating status. The alarm unit generates a corresponding alarm prompt based on the corresponding fault code, thus generating corresponding alarm information. The fault self-diagnosis module monitors the operating status of the power isolation module, signal isolation module, and power conversion module in real time and provides intuitive fault prompts through the alarm unit, which helps to shorten troubleshooting time, achieve rapid early warning of functional module faults, and improve system operation and maintenance efficiency.

[0006] According to the aforementioned embodiments of the present invention, the power isolation transformer and the digital isolator are electrically isolated. The circuit board has a power circuit area and a signal circuit area. The power isolation transformer is disposed in the power circuit area, and the digital isolator is disposed in the signal circuit area. The circuit board is provided with a first wire that electrically connects adjacent modules in the power circuit area and a second wire that electrically connects adjacent modules in the signal circuit area, wherein the distance between the first wire and the second wire is greater than or equal to 3 mm.

[0007] According to the foregoing embodiments of the present invention, the circuit board has a wire crossing area, in which a first wire and a second wire cross perpendicularly, and an insulating layer is provided between the first wire and the second wire.

[0008] According to the aforementioned embodiments of the present invention, the wiring terminal also includes a reserved terminal, and the housing assembly is marked with a plurality of numerical identifiers, which correspond one-to-one with the input power terminal, the output power terminal, the first communication terminal, the second communication terminal and the reserved terminal.

[0009] According to the aforementioned embodiments of the present invention, the isolated communication security barrier device further includes multiple plugs, each plug being correspondingly and detachably connected to multiple terminals. Different types of terminals are provided with elastic buckles of different external shapes, and the plugs are provided with slots that are matched and connected to the elastic buckles. When a terminal is inserted into a corresponding plug, the elastic buckle engages with the slot to lock the terminal. Under external force, the elastic buckle can be pushed out of the slot to unlock the terminal.

[0010] According to the foregoing embodiments of the present invention, the power conversion module further includes a wide voltage input unit, the input voltage range of which is 8-36VDC, and the wide voltage input unit is used to switch the isolated communication safety barrier device to a stable downstream operating voltage.

[0011] According to any of the foregoing embodiments of the present invention, the protection circuit unit includes an overvoltage protection unit and an overcurrent protection unit. The overvoltage protection unit includes a series structure of a Zener diode and a fuse, and the overcurrent protection unit includes an integrated structure of a current-limiting resistor and an overcurrent detection chip.

[0012] According to any of the foregoing embodiments of the present invention, the alarm unit includes a first prompting structure and a second prompting structure, the first prompting structure being used to generate a voice broadcast prompt and / or emit a buzzer sound prompt, and the second prompting structure being used to generate a warning light prompt.

[0013] According to the aforementioned embodiments of the present invention, the second warning structure includes a safety side indicator light and a danger side indicator light. The safety side indicator light and / or the danger side indicator light can generate warning light prompts with different flashing frequencies and / or colors to generate corresponding alarm information for different fault codes.

[0014] According to any of the foregoing embodiments of the present invention, the isolation transformer includes a high-permeability magnetic material to isolate the power supply between the safe side and the dangerous side; the digital isolator isolates the RS485 communication signal between the safe side and the dangerous side through opto-isolation or magnetic isolation.

[0015] According to any of the foregoing embodiments of the present invention, the housing assembly includes a detachably connected cover plate and a base, the bottom of the base including a mounting slot for mounting the isolated communication security barrier device to the target rail. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an embodiment of the isolated communication security barrier device of the present invention;

[0018] Figure 2 This is an exploded structural diagram of an embodiment of the isolated communication safety barrier device of the present invention;

[0019] Figure 3 This is a schematic diagram of the functional components of an embodiment of the isolated communication security barrier device of the present invention;

[0020] Figure 4 This is a schematic diagram of the elastic latch on the input power terminal in one embodiment of the isolated communication safety barrier device of the present invention;

[0021] Figure 5 This is a schematic diagram of the elastic buckle on the first communication terminal in one embodiment of the isolated communication safety barrier device of the present invention.

[0022] Explanation of icon numbers:

[0023] Circuit board-100, terminal block-200, power isolation module-300, signal isolation module-400, power conversion module-500, safety side indicator light-600, danger side indicator light-700, cover plate-800, base-900, plug-1000;

[0024] Input power terminal - 210, output power terminal - 220, first communication terminal - 230, second communication terminal - 240, elastic buckle - 250, first conversion module - 510, second conversion module - 520, mounting slot - 910.

[0025] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0028] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0029] This invention provides an isolated communication safety barrier device, which can improve the power and signal isolation performance between the safe side and the dangerous side, realize reliable isolated transmission and bidirectional communication of RS485 communication signals, realize rapid early warning of functional module failures, improve system operation and maintenance efficiency, and has strong anti-interference ability, which is conducive to resisting surges and common-mode interference in complex electromagnetic environments.

[0030] like Figures 1 to 3 As shown, this embodiment of the invention provides an isolated communication safety barrier device, including a housing assembly and functional components. The functional components are disposed within the housing assembly and include: a circuit board 100, multiple terminal blocks 200, a power isolation module 300, a signal isolation module 400, a power conversion module 500, and a fault self-diagnosis module. The modules within the functional components are electrically connected via circuit wiring to form a complete signal transmission and power distribution circuit.

[0031] like Figures 1 to 3 As shown, multiple terminals 200 are electrically connected to the circuit board 100. The terminals include an input power terminal 210, an output power terminal 220, a first communication terminal 230, and a second communication terminal 240. The input power terminal 210 and the first communication terminal 230 are connected to the power supply and communication equipment on the safety side. The output power terminal 220 and the second communication terminal 240 are connected to the power supply and communication equipment on the danger side that need to be isolated. The first communication terminal 230 and the second communication terminal 240 are RS485 communication terminals.

[0032] like Figures 1 to 3 As shown, the power conversion module 500 is electrically connected to the circuit board 100. The power conversion module 500 includes a first conversion module 510 and a second conversion module 520. The first conversion module 510 is electrically connected to the input power terminal 210, and the second conversion module 520 is electrically connected to the output power terminal 220. Both the first conversion module 510 and the second conversion module 520 include a protection circuit unit and a common-mode filter circuit unit. The protection circuit unit is used to limit the peak voltage and current in the circuit, and the common-mode filter circuit unit is used to suppress electromagnetic interference in the circuit.

[0033] like Figures 1 to 3 As shown, the power isolation module 300 is electrically connected between the first conversion module 510 and the second conversion module 520. The power isolation module 300 includes a power isolation transformer for isolating the power supply between the safe side and the dangerous side. The signal isolation module 400 is electrically connected between the first communication terminal 230 and the second communication terminal 240. The signal isolation module 400 includes a digital isolator for isolating the RS485 communication signal between the safe side and the dangerous side.

[0034] In this embodiment, the fault self-diagnosis module includes a detection unit, a fault output unit, and an alarm unit. The detection unit is used to detect the operating status of the power isolation module 300, the signal isolation module 400, and the power conversion module 500. When the detection unit detects that the operating status of the power isolation module 300, and / or the signal isolation module 400, and / or the power conversion module 500 does not match the corresponding preset status, the fault output unit is used to generate a fault code corresponding to the abnormal operating status, and the alarm unit is used to generate a corresponding alarm prompt based on the corresponding fault code, so as to generate corresponding alarm information.

[0035] This invention provides a power isolation module 300, a signal isolation module 400, a power conversion module 500, and a fault self-diagnosis module within the functional components of an isolated communication safety barrier device. The power isolation module 300 includes a power isolation transformer for isolating the power supply between the safe and hazardous sides. The signal isolation module 400 includes a digital isolator for isolating the RS485 communication signal between the safe and hazardous sides. This improves the power and signal isolation performance between the safe and hazardous sides, enabling reliable isolated transmission and bidirectional communication of RS485 signals, and providing reliable protection for signal transmission between the safe and hazardous sides. The power conversion module 500 includes a protection circuit unit and a common-mode filter circuit unit. The protection circuit unit limits peak voltage and current in the circuit, while the common-mode filter circuit unit suppresses electromagnetic interference in the circuit. It has strong anti-interference capabilities, effectively resisting surges and common-mode interference in complex electromagnetic environments, and is suitable for complex industrial environments. The fault self-diagnosis module includes a detection unit, a fault output unit, and an alarm unit. The detection unit is used to detect the operating status of the power isolation module 300, the signal isolation module 400, and the power conversion module 500. When the detection unit detects that the operating status of the power isolation module 300, and / or the signal isolation module 400, and / or the power conversion module 500 does not match the corresponding preset status, the fault output unit is used to generate a fault code corresponding to the abnormal operating status. The alarm unit is used to generate a corresponding alarm prompt based on the corresponding fault code, so as to generate corresponding alarm information. The fault self-diagnosis module monitors the operating status of the power isolation module 300, the signal isolation module 400, and the power conversion module 500 in real time, and intuitively prompts the fault through the alarm unit, which helps to shorten the troubleshooting time, realize rapid early warning of functional module faults, and improve the efficiency of system operation and maintenance.

[0036] In this embodiment, the power isolation transformer and the digital isolator are electrically isolated. The circuit board 100 has a power loop area and a signal loop area. The input / output lines of the power isolation module 300 and the signal isolation module 400 are arranged in separate areas. The power isolation transformer is located in the power loop area, and the digital isolator is located in the signal loop area. The circuit board 100 is provided with a first wire that electrically connects adjacent modules in the power loop area and a second wire that electrically connects adjacent modules in the signal loop area. The distance between the first wire and the second wire is greater than or equal to 3mm.

[0037] In this embodiment, the circuit board 100 has a wire crossing area where the first wire and the second wire cross perpendicularly, and an insulating layer is provided between the first wire and the second wire. Specifically, the crossing point uses a combination of perpendicular crossing and an insulating layer to prevent leakage current conduction between the wires. The grounding terminal of the power isolation module 300 (such as the secondary ground of the isolation transformer) and the grounding terminal of the signal isolation module 400 (such as the signal ground of the digital isolator) are independent of each other, blocking ground loop interference. For example, the safety-side power ground and the safety-side signal ground are separated, and the danger-side power ground and the danger-side signal ground are separated to avoid noise coupling caused by common ground.

[0038] Specifically, the power circuit area and signal circuit area of ​​the power isolation module 300 and signal isolation module 400 can be separated inside the housing by an insulating partition (such as a high-temperature resistant epoxy resin board) to further prevent the insulation performance from deteriorating due to dust and moisture, while reducing mechanical interference between modules caused by vibration. The power isolation transformer and digital isolator are set apart. If the power isolation transformer is large and has a strong magnetic field, it can be placed at the edge of the circuit board 100. The digital isolator is sensitive to magnetic fields and can be placed on the other side away from the power isolation transformer.

[0039] In this embodiment, the detection unit can be a microcontroller, and the fault output unit includes an encoder. It processes abnormal operating states through signal processing circuitry to generate corresponding fault codes. The detection unit is connected to the power isolation module 300, signal isolation module 400, and power conversion module 500 via signal lines, and collects the operating parameters of each module in real time, such as voltage, current, and signal transmission status. The fault output unit is electrically connected to the detection unit and can generate fault codes corresponding to abnormal operating states. The alarm unit is electrically connected to the fault output unit, receives fault codes, and outputs corresponding alarm information.

[0040] In this embodiment, the wiring terminal 200 also includes a reserved terminal. The housing assembly is marked with multiple numerical identifiers, which correspond one-to-one with the input power terminal 210, the output power terminal 220, the first communication terminal 230, the second communication terminal 240, and the reserved terminal. The reserved terminal is left unconnected.

[0041] In this embodiment, as Figure 2 As shown, the isolated communication safety barrier device also includes multiple plugs 1000, which are detachably connected to multiple terminals 200 in a one-to-one correspondence. Figures 4 to 5As shown, different types of terminals 200 are provided with elastic buckles 250 of different external shapes, and plugs 1000 are provided with slots that correspond to and match the elastic buckles 250. When the terminal 200 is inserted into the corresponding plug 1000, the elastic buckle 250 engages with the slot to lock the terminal 200. Under the action of external force, the elastic buckle 250 can be pushed out of the slot to unlock the terminal 200.

[0042] Because the elastic clips 250 of different types of terminal blocks 200 have different external shapes, each type of terminal block 200 can only be inserted into its corresponding plug 1000. After the terminal block 200 is inserted into the corresponding plug 1000, the elastic clip 250 automatically engages with the slot inside the plug 1000 to prevent it from falling off due to vibration or external force. Disassembly can be achieved by unlocking the elastic clip 250 with external force. Multiple terminal blocks 200 are adapted to different plugs 1000 through different numerical markings on the housing assembly and the different shapes of the elastic clips 250, which helps reduce the chance of incorrect insertion.

[0043] Furthermore, the terminals and plugs 1000 can also be configured with different shapes depending on the type. For example, the input power terminal 210 on the safety side includes square interfaces 1 and 2; the first communication terminal 230 on the safety side includes circular interfaces 3 and 4. The output power terminal 220 on the danger side includes triangular interfaces 5 and 6; the second communication terminal 240 on the danger side includes circular interfaces 7 and 8. Each terminal surface is marked with a numerical identifier corresponding to the housing, such as "1" and "2".

[0044] In this embodiment, multiple terminals 200 are detachably connected to the circuit board 100 via a screw-type plug-in structure. The screw-type plug-in design facilitates wiring replacement and also helps ensure the stability and reliability of signal transmission and power supply.

[0045] In this embodiment, input interfaces 1, 2, 3, and 4 are connected to the safety-side power supply and communication equipment, while output interfaces 5, 6, 7, and 8 are connected to the hazardous-side instruments and equipment, enabling bidirectional transmission of signals and power. The power isolation module 300 and signal isolation module 400 are positioned between the safety-side and hazardous-side.

[0046] In this embodiment, the interfaces 1 and 2 of the safety-side input power terminal 210 are electrically connected to the first conversion module 510 on the safety side, and the interfaces 5 and 6 of the dangerous-side output power terminal 220 are electrically connected to the second conversion module 520 on the dangerous side. The power isolation module 300 is disposed between the first conversion module 510 on the safety side and the second conversion module 520 on the dangerous side, and achieves power isolation between the safety side and the dangerous side through electromagnetic induction to prevent faults on the dangerous side from being conducted to the safety side.

[0047] In this embodiment, the input terminal of the digital isolator of the signal isolation module 400 is electrically connected to interfaces 3 and 4 of the first communication terminal 230 on the safe side, and the output terminal is electrically connected to interfaces 7 and 8 of the second communication terminal 240 on the dangerous side. The RS485 communication signal on the safe side is transmitted to the dangerous side after isolation by the digital isolator, while the signal on the dangerous side is transmitted back to the safe side, realizing bidirectional isolated transmission of RS485 signals and avoiding signal interference and electrical fault conduction. The power isolation module 300 and the signal isolation module 400 block the direct electrical connection between the dangerous side and the safe side to prevent energy runaway.

[0048] In this embodiment, the power conversion module 500 also includes a wide voltage input unit with an input voltage range of 8-36VDC. The wide voltage input unit is used to switch the isolated communication safety barrier device to a stable downstream operating voltage to adapt to the power supply requirements of different scenarios and avoid failures caused by voltage fluctuations or interference.

[0049] In this embodiment, the protection circuit unit includes an overvoltage protection unit and an overcurrent protection unit. The overvoltage protection unit includes a series structure of a Zener diode and a fuse. When the voltage exceeds a threshold, the Zener diode breaks down and clamps; when there is an overcurrent, the fuse blows. The overcurrent protection unit includes an integrated structure of a current-limiting resistor and an overcurrent detection chip, used to limit the peak voltage and current in the circuit and cut off the circuit when the voltage and / or current are abnormal. The common-mode filter circuit unit includes a common-mode inductor connected in series in the input circuit and a filter capacitor connected in parallel between the output terminal and ground, used to suppress common-mode electromagnetic interference and ensure power supply stability. The 24V power supply on the safety side is connected to the power conversion module 500 through interface 1 and interface 2 of the input power terminal 210. After being regulated by the wide voltage input unit, the common-mode filter circuit unit, the overvoltage protection unit, and the overcurrent protection unit, it is isolated and output to the hazardous side through the power isolation transformer to power the field instruments. By setting up the overvoltage protection unit, the overcurrent protection unit, and the power isolation transformer, multiple protections are achieved, limiting the energy transmission on the hazardous side, meeting intrinsic safety requirements, and preventing electrical faults from causing explosions.

[0050] In this embodiment, the alarm unit includes a first prompting structure and a second prompting structure. The first prompting structure is used to generate a voice broadcast prompt and / or emit a buzzer sound prompt, and the second prompting structure is used to generate a warning light prompt.

[0051] In this embodiment, the first prompting structure includes a voice prompt and / or a buzzer, and the second prompting structure includes a safety-side indicator light 600 and a danger-side indicator light 700. The safety-side indicator light 600 and the danger-side indicator light 700 are respectively disposed on the circuit board 100 and used to generate safety-side and danger-side warnings. The safety-side indicator light 600 and / or the danger-side indicator light 700 can generate warning light prompts with different flashing frequencies and / or colors to generate corresponding alarm information for different fault codes. This facilitates rapid early warning of functional component failures, enables real-time monitoring and self-diagnosis functions, allows for timely fault location, and improves maintenance efficiency.

[0052] In one implementation, during normal operation, the safety indicator light 600 is constantly green, and the danger indicator light 700 is constantly red. If there is an overvoltage, the green light flashes twice per second, and a buzzer sounds an intermittent alarm. If the signal isolation module 400 fails, the red light flashes three times per second, the buzzer sounds a continuous alarm, and a voice prompt is issued.

[0053] In this embodiment, the isolation transformer incorporates high-permeability magnetic materials, such as ferrite and nanocrystalline alloys, to isolate the power supply between the safe and hazardous sides. The primary winding is connected to the power supply on the safe side, and the secondary winding is connected to the power distribution output on the hazardous side. This facilitates efficient and stable power isolation, providing a stable isolated power supply for the field instruments on the hazardous side. The digital isolator uses opto-isolation or magnetic isolation to isolate the RS485 communication signals between the safe and hazardous sides, such as optocoupler chips and giant magnetoresistive chips. This enables high-speed and high-precision signal transmission, reduces transmission delay, and achieves reliable isolated transmission and bidirectional communication of RS485 signals between the hazardous and safe sides, effectively preventing signal interference and the propagation of electrical faults.

[0054] In this embodiment, the housing assembly includes a detachably connected cover plate 800 and a base 900. The bottom of the base 900 includes a mounting slot 910 for mounting the isolated communication safety barrier device on the target guide rail, which improves installation efficiency and ensures the stability of the isolated communication safety barrier device during operation.

[0055] In this embodiment, the cover plate 800 and the base 900 are fastened together by a snap-fit ​​structure, facilitating disassembly and maintenance. Other detachable connection methods may be used in other embodiments, and this application does not limit them.

[0056] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An isolated communication security barrier device, characterized in that, It includes a housing assembly and a functional component, wherein the functional component is disposed within the housing assembly, and the functional component includes: Circuit board; Multiple terminals are electrically connected to the circuit board. The terminals include an input power terminal, an output power terminal, a first communication terminal, and a second communication terminal. The input power terminal and the first communication terminal are connected to the power supply and communication equipment on the safety side. The output power terminal and the second communication terminal are connected to the power supply and communication equipment on the danger side that need to be isolated. The first communication terminal and the second communication terminal are RS485 communication terminals. A power conversion module is electrically connected to the circuit board. The power conversion module includes a first conversion module and a second conversion module. The first conversion module is electrically connected to the input power terminal, and the second conversion module is electrically connected to the output power terminal. Both the first conversion module and the second conversion module include a protection circuit unit and a common-mode filter circuit unit. The protection circuit unit is used to limit the peak voltage and current in the circuit, and the common-mode filter circuit unit is used to suppress electromagnetic interference in the circuit. A power isolation module is electrically connected between the first conversion module and the second conversion module. The power isolation module includes a power isolation transformer for isolating the power supply between the safe side and the dangerous side. A signal isolation module, electrically connected between the first communication terminal and the second communication terminal, includes a digital isolator for isolating RS485 communication signals between the safe side and the dangerous side; and The fault self-diagnosis module includes a detection unit, a fault output unit, and an alarm unit. The detection unit is used to detect the operating status of the power isolation module, the signal isolation module, and the power conversion module. When the detection unit detects that the operating status of the power isolation module, and / or the signal isolation module, and / or the power conversion module does not match the corresponding preset status, the fault output unit is used to generate a fault code corresponding to the abnormal operating status. The alarm unit is used to generate a corresponding alarm prompt based on the corresponding fault code, so as to generate corresponding alarm information.

2. The isolated communication security barrier device as described in claim 1, characterized in that, The power isolation transformer and the digital isolator are electrically isolated. The circuit board has a power circuit area and a signal circuit area. The power isolation transformer is located in the power circuit area, and the digital isolator is located in the signal circuit area. The circuit board is provided with a first wire that electrically connects adjacent modules in the power circuit area and a second wire that electrically connects adjacent modules in the signal circuit area. The distance between the first wire and the second wire is greater than or equal to 3mm.

3. The isolated communication security barrier device as described in claim 2, characterized in that, The circuit board has a wire crossing area where the first wire and the second wire cross perpendicularly, and an insulating layer is provided between the first wire and the second wire.

4. The isolated communication security barrier device as described in claim 1, characterized in that, The wiring terminals also include reserved terminals. The housing assembly is marked with multiple numerical identifiers, which correspond one-to-one with the input power terminal, the output power terminal, the first communication terminal, the second communication terminal, and the reserved terminal.

5. The isolated communication security barrier device as described in claim 4, characterized in that, The isolated communication safety barrier device also includes multiple plugs, which are detachably connected to the multiple terminals. Different types of terminals are provided with elastic buckles of different external shapes. The plugs are provided with slots that are matched and connected to the elastic buckles. When the terminal is inserted into the corresponding plug, the elastic buckle engages with the slot to lock the terminal. Under the action of external force, the elastic buckle can be pushed out of the slot to unlock the terminal.

6. The isolated communication security barrier device as described in claim 1, characterized in that, The power conversion module also includes a wide voltage input unit with an input voltage range of 8-36VDC. The wide voltage input unit is used to switch the isolated communication safety barrier device to a stable downstream operating voltage.

7. The isolated communication security barrier device according to any one of claims 2 to 6, characterized in that, The protection circuit unit includes an overvoltage protection unit and an overcurrent protection unit. The overvoltage protection unit includes a series structure of a Zener diode and a fuse, and the overcurrent protection unit includes an integrated structure of a current-limiting resistor and an overcurrent detection chip.

8. The isolated communication security barrier device according to any one of claims 2 to 6, characterized in that, The alarm unit includes a first prompting structure and a second prompting structure. The first prompting structure is used to generate a voice broadcast prompt and / or emit a buzzer sound prompt, and the second prompting structure is used to generate a warning light prompt.

9. The isolated communication security barrier device as described in claim 8, characterized in that, The second warning structure includes a safety side indicator light and a danger side indicator light. The safety side indicator light and / or the danger side indicator light can generate warning light prompts with different flashing frequencies and / or colors to generate corresponding alarm information for different fault codes.

10. The isolated communication security barrier device according to any one of claims 2 to 6, characterized in that, The isolation transformer includes a high-permeability magnetic material to isolate the power supply between the safe side and the dangerous side. The digital isolator isolates RS485 communication signals between the safe side and the dangerous side through opto-isolation or magnetic isolation.

11. The isolated communication security barrier device according to any one of claims 2 to 6, characterized in that, The housing assembly includes a detachably connected cover and a base, the bottom of which includes a mounting slot for mounting the isolated communication safety barrier device onto a target rail.

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