An intrinsically safe 5G industrial router
By introducing intrinsically safe power circuits and modular design into industrial routers, the problem of excessive circuit energy in high-risk environments is solved, achieving explosion-proof safety and stable communication, and meeting intrinsic safety certification requirements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HAOXUAN TECHNOLOGY (CHANGZHOU) CO LTD
- Filing Date
- 2025-07-08
- Publication Date
- 2026-07-31
AI Technical Summary
Existing industrial routers may exceed circuit energy limits in high-risk environments, potentially generating electrical sparks or high temperatures, thus failing intrinsic safety certification.
An intrinsically safe 5G industrial router was designed, employing an intrinsically safe power supply circuit, a 5G communication module circuit, a multi-network redundancy unit circuit, and a protocol conversion circuit. Energy limiting is achieved through TVS diodes, Zener diodes, self-resetting fuses, and voltage limiting modules. Combined with a split modular circuit layout and a multi-network redundancy unit design, the circuit ensures explosion-proof safety and stable communication in high-risk environments.
It achieves explosion-proof safety and stable communication in high-risk environments, meets intrinsic safety certification standards, prevents the generation of electrical sparks and high temperatures, and ensures that the circuit energy is insufficient to ignite explosive gases.
Smart Images
Figure CN224583197U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pet bathing control circuit technology, specifically an intrinsically safe 5G industrial router. Background Technology
[0002] An industrial router is a device that provides wireless data transmission capabilities to users using a public wireless network. Industrial routers are widely used in the M2M industry within the Internet of Things (IoT) supply chain, such as smart grids, smart homes, intelligent transportation, financial IoT wireless communication routers, supply chain automation, mobile POS terminals, industrial automation, fire protection, public safety, smart buildings, environmental protection, meteorology, remote sensing, digital healthcare, agriculture, forestry, coal mining, water management, and petrochemicals. An industrial router is a durable device used to connect two or more networks, capable of transmitting signals to the required ports. Gateways can be used to convert between standard Ethernet and industrial Ethernet protocols, wireless and wired interfaces, or Ethernet and fieldbus communication protocols.
[0003] Existing industrial routers have the following problems when used in high-risk environments: Excessive circuit energy: The power modules of ordinary routers do not limit voltage / current, which may generate electrical sparks or high temperatures, and cannot pass intrinsic safety certification (such as GB3836.4-2010 standard). Utility Model Content
[0004] The purpose of this invention is to provide an intrinsically safe 5G industrial router to solve the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:
[0006] An intrinsically safe 5G industrial router includes an intrinsically safe power supply circuit, a 5G communication module circuit, a multi-network redundancy unit circuit, and a protocol conversion circuit.
[0007] The intrinsically safe power supply circuit is electrically connected to the 5G communication module circuit, the multi-network redundancy unit circuit, and the protocol conversion circuit, respectively, and the multi-network redundancy unit circuit is electrically connected to the 5G communication module circuit and the protocol conversion circuit, respectively.
[0008] The intrinsically safe power supply circuit includes a socket XS1, a power module M2, and a voltage limiting module M1.
[0009] The DC+ terminal of the socket XS1, fuse FU1, diode D1, fuse FU2, and Vin port of the power module M2 are connected in series; the DC- terminal of the socket XS1 is electrically connected to the GND port of the power module M2.
[0010] The fuse FU1 and diode D1 are connected to an external resettable fuse T1, TVS diode D3 and TVS diode D4. The resettable fuse T1, TVS diode D3 and TVS diode D4 are connected in parallel. The resettable fuse T1, TVS diode D3 and TVS diode D4 are all electrically connected to the DC- terminal of the socket XS1 and electrically connected to the GND port of the power module M2.
[0011] The +VO port of the power module M2 is electrically connected to the PIN port of the voltage limiting module M1, and the -VO port of the power module M2 is electrically connected to the GND port of the voltage limiting module M1.
[0012] Furthermore, capacitors C4 and C5 are externally connected between the fuse FU2 and the Vin port of the power module M2. The capacitors C4 and C5 are connected in parallel, and both capacitors C4 and C5 are electrically connected to the DC- terminal of the socket XS1 and the GND port of the power module M2.
[0013] The Vin port and the +VO port of the power module M2 are electrically connected through capacitor CY1, and the GND port and the -VO port of the power module M2 are electrically connected through capacitor CY2.
[0014] The POUT port of the voltage limiting module M1, capacitor C3, and GND port of the voltage limiting module M1 are connected in series. An external capacitor C2 and a 5V terminal are connected between the POUT port of the voltage limiting module M1 and capacitor C3. The capacitor C2 is electrically connected between capacitor C3 and GND port of the voltage limiting module M1. The connection between capacitor C3 and GND port of the voltage limiting module M1 is grounded.
[0015] Furthermore, the voltage limiting module M1 includes a Zener diode D9 and a thyristor Q6. The PIN port and POUT port of the voltage limiting module M1 are connected in series through an inductor B1, and the two GND ports of the voltage limiting module M1 are connected in series.
[0016] One end of the Zener diode D9 is electrically connected between the PIN port of the voltage limiting module M1 and the inductor B1, and the other end of the Zener diode D9 is electrically connected between the two GND ports of the voltage limiting module M1 through the resistor R50.
[0017] The A terminal of the thyristor Q6 is electrically connected between the PIN port of the voltage limiting module M1 and the inductor B1, and the K terminal of the thyristor Q6 is electrically connected between the two GND ports of the voltage limiting module M1; the G terminal of the thyristor Q6 is electrically connected between the Zener diode D9 and the resistor R50 through the resistor R51.
[0018] Furthermore, the voltage limiting module M1 also includes a Zener diode D10 and a thyristor Q7;
[0019] One end of the Zener diode D10 is electrically connected between the PIN port of the voltage limiting module M1 and the inductor B1, and the other end of the Zener diode D10 is electrically connected between the two GND ports of the voltage limiting module M1 through the resistor R52.
[0020] The A terminal of the thyristor Q7 is electrically connected between the PIN port of the voltage limiting module M1 and the inductor B1, and the K terminal of the thyristor Q7 is electrically connected between the two GND ports of the voltage limiting module M1; the G terminal of the thyristor Q7 is electrically connected between the Zener diode D10 and the resistor R52 through the resistor R53.
[0021] The voltage limiting module M1 has two external capacitors C20 and C21 connected between its two GND ports. The other end of capacitor C20 is electrically connected between resistors R50 and R51, and the other end of capacitor C21 is electrically connected between resistors R52 and R53.
[0022] Furthermore, the 5G communication module circuit includes a 5G baseband chip M4, and the multi-network redundancy unit circuit includes a plug-in network port J1. Several isolation transformers are connected in parallel between the G1 port and the G2 port of the plug-in network port J1, and the 5G baseband chip M4 is electrically connected to the isolation transformers.
[0023] Furthermore, the protocol conversion circuit includes an integrated RS485 interface M6 and an isolated transceiver module M5;
[0024] The VCC port, capacitor C17, and GND port of the isolated transceiver module M5 are connected in series. The capacitor C17 and the GND port of the isolated transceiver module M5 are grounded. An external 5V terminal is connected between the VCC port of the isolated transceiver module M5 and the capacitor C17.
[0025] The RGND port of the isolated transceiver module M5 is connected in series with the RGND port of the integrated RS485 interface M6. The A port of the isolated transceiver module M5 is connected to the A / H port of the integrated RS485 interface M6 through the TXA1 wiring. The B port of the isolated transceiver module M5 is connected to the B / L port of the integrated RS485 interface M6 through the TXB1 wiring. The 485ACANH port of the integrated RS485 interface M6 is connected to the 3rd interface of the socket XS1 through the RS485A1 wiring. The 485BCANL port of the integrated RS485 interface M6 is connected to the 4th interface of the socket XS1 through the RS485B1 wiring.
[0026] The TXD port of the isolated transceiver module M5 is connected to the UARTO_TX port of the 5G baseband chip M4 via the TXD0 wiring, and the RXD port of the isolated transceiver module M5 is connected to the UARTO_RX port of the 5G baseband chip M4 via the RXD0 wiring.
[0027] Furthermore, the protocol conversion circuit also includes an integrated RS485 interface M8 and an isolated transceiver module M7;
[0028] The VCC port, capacitor C19, and GND port of the isolated transceiver module M7 are connected in series. The capacitor C19 and the GND port of the isolated transceiver module M7 are grounded. A 5V terminal is connected between the VCC port of the isolated transceiver module M7 and the capacitor C19.
[0029] The RGND port of the isolated transceiver module M7 is connected in series with the RGND port of the integrated RS485 interface M8. The A port of the isolated transceiver module M7 is connected to the A / H port of the integrated RS485 interface M8 through the TXA2 wiring. The B port of the isolated transceiver module M7 is connected to the B / L port of the integrated RS485 interface M8 through the TXB2 wiring. The 485ACANH port of the integrated RS485 interface M8 is connected to the 5th interface of the socket XS1 through the RS485A2 wiring. The 485BCANL port of the integrated RS485 interface M8 is connected to the 6th interface of the socket XS1 through the RS485B2 wiring.
[0030] The TXD port of the isolated transceiver module M7 is connected to the TX1 / PWM1 port of the motherboard chip M3 via the TX1 wire, and the RXD port of the isolated transceiver module M7 is connected to the TX1 / PWM1 port of the motherboard chip M3 via the RX1 wire.
[0031] Furthermore, the L_RX1+ port of the 5G baseband chip M4 is connected to the RXPO port of the motherboard chip M3 through resistor R10, the L_RX1- port of the 5G baseband chip M4 is connected to the RXNO port of the motherboard chip M3 through resistor R11, the L_TX1+ port of the 5G baseband chip M4 is connected to the TXPO port of the motherboard chip M3 through resistor R12, and the L_TX1- port of the 5G baseband chip M4 is connected to the TXNO port of the motherboard chip M3 through resistor R13.
[0032] Compared with the prior art, the beneficial effects achieved by this utility model are:
[0033] The circuit in this invention employs a multi-stage energy limiting circuit in its intrinsically safe power supply circuit. Intrinsic safety is achieved through a TVS diode, Zener diode, resettable fuse, and voltage limiting module. The modular circuit layout, intrinsically safe power supply circuit, and multi-network redundancy unit design ensure explosion-proof safety and stable communication in high-risk environments. After the intrinsically safe power supply circuit receives a wide voltage input, it passes through three protection circuits before reaching the power module M2. The input voltage first passes through the first-stage resettable fuse T1 (its resistance changes linearly with voltage, with a response speed in the nanosecond range, suitable for transient overvoltage protection such as lightning strikes and electrostatic discharge). It then enters the second-stage protection transient suppression diodes D3 and D4 (transient suppression diode model SMBJ24CA, breakdown voltage 26.7V, response time ≤...). 1ns); Entering the 3rd level protection Schottky diode D1 (forward voltage drop, maximum directional voltage up to 40V, reverse current 1A, reverse recovery time almost 0ns); DC12-24V voltage enters the power module M2 (model URB2405YMD_10WR3), and after being transformed by the transformer, the output voltage is 5V (maximum voltage 5V±0.5V, current ≤3000mA, power ≤15W, meeting ExibIIBT5 standard), and then enters the next protection module - voltage limiting module M1; the voltage limiting module M1 uses thyristors, Zener diodes, current limiting resistors and other devices to perform voltage and current limiting control energy protection circuit; the voltage limiting module M1 is used to ensure that the energy stored in the circuit after the power module M2 is transformed is not enough to ignite the explosive gas. Attached Figure Description
[0034] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0035] Figure 1 This is the overall circuit block diagram of this utility model;
[0036] Figure 2 This is a circuit diagram of the intrinsically safe power supply circuit of this utility model;
[0037] Figure 3 This is a circuit diagram of the voltage limiting module M1 of this utility model;
[0038] Figure 4 This is a circuit diagram of the 5G communication module circuit of this utility model;
[0039] Figure 5 This is a circuit diagram of the multi-network redundancy unit circuit of this utility model;
[0040] Figure 6 This is a circuit diagram of the protocol conversion circuit of this utility model;
[0041] Figure 7 This is a circuit diagram of the motherboard chip M3 of this utility model;
[0042] In the diagram: 1. Intrinsically safe power supply circuit; 2. 5G communication module circuit; 3. Multi-network redundancy unit circuit; 4. Protocol conversion circuit. Detailed Implementation
[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0044] like Figures 1-7 As shown, this utility model provides a technical solution: an intrinsically safe 5G industrial router, comprising an intrinsically safe power supply circuit 1, a 5G communication module circuit 2, a multi-network redundancy unit circuit 3, and a protocol conversion circuit 4. The intrinsically safe power supply circuit 1 is electrically connected to the 5G communication module circuit 2, the multi-network redundancy unit circuit 3, and the protocol conversion circuit 4, respectively, and the multi-network redundancy unit circuit 3 is electrically connected to the 5G communication module circuit 2 and the protocol conversion circuit 4, respectively. The intrinsically safe power supply circuit 1 includes a socket XS1, a power module M2, and a voltage limiting module M1. The DC+ terminal of the socket XS1, the fuse FU1, the diode D1, the fuse FU2, and the Vin port of the power module M2 are connected in series. The DC- terminal of the socket XS1 is electrically connected to the GND port of the power module M2; a resettable fuse T1, a TVS diode D3, and a TVS diode D4 are externally connected between the fuse FU1 and the diode D1, and the resettable fuse T1, TVS diode D3, and TVS diode D4 are connected in parallel. The resettable fuse T1, TVS diode D3, and TVS diode D4 are all electrically connected to the DC- terminal of the socket XS1 and electrically connected to the GND port of the power module M2; the +VO port of the power module M2 is electrically connected to the PIN port of the voltage limiting module M1, and the -VO port of the power module M2 is electrically connected to the GND port of the voltage limiting module M1.
[0045] In one embodiment, such as Figure 2As shown, capacitors C4 and C5 are externally connected between the fuse FU2 and the Vin port of the power module M2. Capacitors C4 and C5 are connected in parallel, and both are electrically connected to the DC- terminal of socket XS1 and to the GND port of power module M2. The Vin port and +VO port of power module M2 are electrically connected via capacitor CY1, and the GND port and -VO port of power module M2 are electrically connected via capacitor CY2. The POUT port of voltage limiting module M1, capacitor C3, and GND port of voltage limiting module M1 are connected in series. An external capacitor C2 and a 5V terminal are connected between the POUT port of voltage limiting module M1 and capacitor C3. Capacitor C2 is electrically connected between capacitor C3 and the GND port of voltage limiting module M1, and the connection between capacitor C3 and the GND port of voltage limiting module M1 is grounded.
[0046] In one embodiment, such as Figure 3 As shown, the voltage limiting module M1 includes a Zener diode D9 and a thyristor Q6. The PIN port and POUT port of the voltage limiting module M1 are connected in series through an inductor B1, and the two GND ports of the voltage limiting module M1 are connected in series. One end of the Zener diode D9 is electrically connected between the PIN port of the voltage limiting module M1 and the inductor B1, and the other end of the Zener diode D9 is electrically connected between the two GND ports of the voltage limiting module M1 through a resistor R50. The A terminal of the thyristor Q6 is electrically connected between the PIN port of the voltage limiting module M1 and the inductor B1, and the K terminal of the thyristor Q6 is electrically connected between the two GND ports of the voltage limiting module M1. The G terminal of the thyristor Q6 is electrically connected between the Zener diode D9 and the resistor R50 through a resistor R51.
[0047] In one embodiment, such as Figure 3 As shown, the voltage limiting module M1 also includes a Zener diode D10 and a thyristor Q7; one end of the Zener diode D10 is electrically connected between the PIN port of the voltage limiting module M1 and the inductor B1, and the other end of the Zener diode D10 is electrically connected between the two GND ports of the voltage limiting module M1 through a resistor R52; the A terminal of the thyristor Q7 is electrically connected between the PIN port of the voltage limiting module M1 and the inductor B1, and the K terminal of the thyristor Q7 is electrically connected between the two GND ports of the voltage limiting module M1; the G terminal of the thyristor Q7 is electrically connected between the Zener diode D10 and the resistor R52 through a resistor R53; capacitors C20 and C21 are externally connected between the two GND ports of the voltage limiting module M1, the other end of capacitor C20 is electrically connected between resistors R50 and R51, and the other end of capacitor C21 is electrically connected between resistors R52 and R53.
[0048] In one embodiment, such as Figure 4 and Figure 5 As shown, the 5G communication module circuit 2 includes a 5G baseband chip M4, and the multi-network redundancy unit circuit 3 includes a plug-in network port J1. Several isolation transformers are connected in parallel between the G1 port and the G2 port of the plug-in network port J1, and the 5G baseband chip M4 is electrically connected to the isolation transformers.
[0049] In one embodiment, such as Figure 6 As shown, the protocol conversion circuit 4 includes an integrated RS485 interface M6 and an isolated transceiver module M5. The VCC port, capacitor C17, and GND port of the isolated transceiver module M5 are connected in series. The capacitor C17 and the GND port of the isolated transceiver module M5 are grounded. An external 5V terminal is connected between the VCC port of the isolated transceiver module M5 and capacitor C17. The RGND port of the isolated transceiver module M5 is connected in series with the RGND port of the integrated RS485 interface M6. The A port of the isolated transceiver module M5 is connected to the A / H port of the integrated RS485 interface M6 via a TXA1 connection. The B port of the M5 module is connected to the B / L port of the integrated RS485 interface M6 via the TXB1 wiring. The 485ACANH port of the integrated RS485 interface M6 is connected to the 3rd interface of the socket XS1 via the RS485A1 wiring. The 485BCANL port of the integrated RS485 interface M6 is connected to the 4th interface of the socket XS1 via the RS485B1 wiring. The TXD port of the isolated transceiver module M5 is connected to the UARTO_TX port of the 5G baseband chip M4 via the TXD0 wiring. The RXD port of the isolated transceiver module M5 is connected to the UARTO_RX port of the 5G baseband chip M4 via the RXD0 wiring.
[0050] In one embodiment, such as Figure 6As shown, the protocol conversion circuit 4 further includes an integrated RS485 interface M8 and an isolated transceiver module M7; the VCC port, capacitor C19, and GND port of the isolated transceiver module M7 are connected in series, and the capacitor C19 and the GND port of the isolated transceiver module M7 are grounded; an external 5V terminal is connected between the VCC port of the isolated transceiver module M7 and the capacitor C19; the RGND port of the isolated transceiver module M7 is connected in series with the RGND port of the integrated RS485 interface M8; the A port of the isolated transceiver module M7 is connected to the A / H port of the integrated RS485 interface M8 through the TXA2 wiring. The B port of the isolated transceiver module M7 is connected to the B / L port of the integrated RS485 interface M8 via the TXB2 wire. The 485ACANH port of the integrated RS485 interface M8 is connected to the 5th interface of the socket XS1 via the RS485A2 wire. The 485BCANL port of the integrated RS485 interface M8 is connected to the 6th interface of the socket XS1 via the RS485B2 wire. The TXD port of the isolated transceiver module M7 is connected to the TX1 / PWM1 port of the motherboard chip M3 via the TX1 wire. The RXD port of the isolated transceiver module M7 is connected to the TX1 / PWM1 port of the motherboard chip M3 via the RX1 wire.
[0051] In one embodiment, such as Figure 4 and Figure 7 As shown, the L_RX1+ port of the 5G baseband chip M4 is connected to the RXPO port of the motherboard chip M3 through resistor R10; the L_RX1- port of the 5G baseband chip M4 is connected to the RXNO port of the motherboard chip M3 through resistor R11; the L_TX1+ port of the 5G baseband chip M4 is connected to the TXPO port of the motherboard chip M3 through resistor R12; and the L_TX1- port of the 5G baseband chip M4 is connected to the TXNO port of the motherboard chip M3 through resistor R13.
[0052] Specific working principle:
[0053] The circuit of this utility model is designed with an intrinsically safe power supply circuit 1, a 5G communication module circuit 2, a multi-network redundancy unit circuit 3, and a protocol conversion circuit 4. The intrinsically safe power supply circuit 1 employs a multi-level energy limiting circuit, achieving intrinsic safety through a TVS diode, Zener diode, self-resetting fuse, and voltage limiting module. The modular circuit layout, intrinsically safe power supply circuit 1, and multi-network redundancy unit 3 design enable explosion-proof safety and stable communication in high-risk environments. The intrinsically safe 5G router (hereinafter referred to as the router) is designed according to industry standards such as coal mines and petrochemical plants. The entire board adopts intrinsically safe design rules. The router is a wireless communication base station that utilizes 3G / 4G / 5G networks to provide users with long-distance wireless data transmission capabilities. This product uses a high-performance industrial-grade 32-bit communication processor and an industrial-grade wireless module, with an embedded real-time operating system as the software support platform. It provides two RS485 ports, four Ethernet LAN ports, one Ethernet WAN port, and one WIFI interface, allowing simultaneous connection of serial devices, Ethernet devices, and WIFI devices to achieve transparent data transmission and routing functions.
[0054] After receiving a 5G signal, the 5G data card converts it into an Ethernet signal via a 5G wireless router, enabling transparent data transmission between 5G and LAN, WAN, WIFI, and RS485, truly achieving data interoperability between 5G and various industrial bus interfaces. It supports 5G cards from China Mobile, China Telecom, and China Unicom, and also supports 4G / 3G dial-up internet access.
[0055] Explosion-proof performance test: Spark test: In an environment with 8% methane concentration, apply a 24V input voltage and run continuously for 24 hours without sparks or abnormal temperature rise; Surge test: Apply a 1.2kV / 500A surge pulse, and the TVS diode clamping voltage is ≤30V, with no circuit damage;
[0056] Intrinsically safe power supply circuit: Wide input voltage: DC12~24V, supports reverse connection protection (diode D1 is SS14, reverse withstand voltage 40V); Surge suppression: two TVS diodes in parallel (D3 and D4, model SMBJ24CA, breakdown voltage 26.7V), response time ≤1ns; Voltage limiting: voltage limiting module M1 (regulated voltage 5.6V); Current limiting: self-resetting fuse T1 (rated current 1A, resistance jumps from 0.1Ω to 10kΩ during overcurrent); Output parameters: maximum voltage 5V±0.5V, current ≤3000mA, power ≤15W (meets ExibIIBT5 standard); Isolation: power module M2 and motherboard chip M3 are connected via DC / DC isolation (URB2405YMD_15WR3, isolation voltage 2500Vrms) to block the energy transfer path;
[0057] The multi-network redundancy unit 3 integrates dual SIM card slots, gigabit and 100-megabit Ethernet ports, and an isolated antenna layout, with a SIM card slot spacing of ≥5mm; the protocol conversion circuit 4 connects to the RS485 interface through an isolation circuit and integrates the Modbus protocol stack and virtual serial port function.
[0058] The card slot uses gold-plated spring contacts (plating thickness 0.2μm) and supports hot-swapping; a grounding copper foil (thickness 35μm) is laid under the SIM card slot to reduce signal crosstalk; the network port is connected to the motherboard chip M3 through an isolation transformer (11F-05, transmission rate 100Mbps) to enhance anti-interference capability; the RS485 interfaces M6 and M8 use TD521485H-A isolation modules M5 and M7 (isolation voltage 2500Vrms), and the baud rate supports 0~500kbps;
[0059] The intrinsically safe power supply, after passing through three protection circuits, will reach the power module M2 after the wide voltage input intrinsically safe power supply circuit 1.
[0060] 1. The input voltage first passes through a Class 1 self-resetting fuse T1 (the resistance value changes linearly with the voltage, and the response speed is in the nanosecond range, making it suitable for transient overvoltage protection such as lightning strikes and electrostatic discharge).
[0061] 2. Enter the second-level protection transient suppression diodes D3 and D4 (transient suppression diode model is SMBJ24CA, breakdown voltage 26.7V, response time ≤1ns);
[0062] 3. Entering the level 3 protection Schottky diode D1 (forward voltage drop, maximum directional voltage up to 40V, reverse current 1A, reverse recovery time almost 0ns);
[0063] After the DC12-24V voltage enters the power module M2 (model URB2405YMD_10WR3), it is transformed by the transformer and outputs a voltage of 5V (maximum voltage 5V±0.5V, current ≤3000mA, power ≤15W, meeting ExibIIBT5 standard). After that, it will enter the next protection module - voltage limiting module M1.
[0064] The voltage limiting module M1 is used to ensure that the energy stored in the circuit after the power module M2 is transformed is insufficient to ignite the explosive gas;
[0065] The voltage limiting module M1 uses devices such as silicon controlled thyristors (SCRs), Zener diodes, and current limiting resistors to perform voltage and current limiting control energy protection circuitry.
[0066] The 5V voltage enters the voltage limiting module M1 from XS1, and is limited by the Zener diode (model ZMM5V1). The thyristors Q6 and Q7 are turned on or off by the gate voltage, and the resistors R50 and R52 control the power.
[0067] The reliability of the selected components is evaluated using a calculation formula:
[0068] 1. Input parameters of this circuit: maximum voltage is 18.5V, maximum current is 1A;
[0069] 2. Specifications of thyristors (Q6 and Q7): Model: JCT151-800R, on-state voltage Vtm = 1.75V, reverse repetitive peak voltage VRRM = 800V, rated on-state current It = 12A, Ih = 0.02A, Rth = 60℃ / W;
[0070] Thyristor (thyristor Q6, thyristor Q7):
[0071] Pi = 18.5V × 1A = 18.5W, and 1.5 times that is 18.5 × 1.5 = 27.75W;
[0072] 27.75W / 5.4V (refer to datasheet) = 4.77A < It;
[0073] Therefore, the thyristors (Q6 and Q7) can be evaluated as reliable components;
[0074] 3. Zener diodes D9 and D10 (ZMM5V1) specifications: Zener range 4.8V-5.4V, Zener value: 5.1V, rated voltage: 0.5W, forward voltage: 1V, Izt = 5mA;
[0075] Calculation of the conduction current of Zener diodes D9 and D10: 18.5 / (10000×(1-1%))=1.869mA, and 1.5 times that is 1.869×1.5=2.803mA<Izt;
[0076] Therefore, Zener diodes D9 and D10 can be assessed as reliable components;
[0077] Power rating of resistor R50 / R52:
[0078] 18.5V*18.5V / 10KΩ / (1-1%)≈0.0345W;
[0079] A safety factor of 1.5 results in 0.0345W * 1.5 = 0.05175W < 0.125W;
[0080] Therefore, resistors R50 and R52 are rated as reliable resistors.
[0081] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An intrinsically safe 5G industrial router, comprising an intrinsically safe power supply circuit (1), a 5G communication module circuit (2), a multi-network redundancy unit circuit (3), and a protocol conversion circuit (4), characterized in that: The intrinsically safe power supply circuit (1) is electrically connected to the 5G communication module circuit (2), the multi-network redundancy unit circuit (3) and the protocol conversion circuit (4) respectively, and the multi-network redundancy unit circuit (3) is electrically connected to the 5G communication module circuit (2) and the protocol conversion circuit (4) respectively. The intrinsically safe power supply circuit (1) includes a socket XS1, a power module M2, and a voltage limiting module M1; The DC+ terminal of the socket XS1, fuse FU1, diode D1, fuse FU2, and Vin port of the power module M2 are connected in series; the DC- terminal of the socket XS1 is electrically connected to the GND port of the power module M2. The fuse FU1 and diode D1 are connected to an external resettable fuse T1, TVS diode D3 and TVS diode D4. The resettable fuse T1, TVS diode D3 and TVS diode D4 are connected in parallel. The resettable fuse T1, TVS diode D3 and TVS diode D4 are all electrically connected to the DC- terminal of the socket XS1 and electrically connected to the GND port of the power module M2. The +VO port of the power module M2 is electrically connected to the PIN port of the voltage limiting module M1, and the -VO port of the power module M2 is electrically connected to the GND port of the voltage limiting module M1.
2. The intrinsically safe 5G industrial router according to claim 1, characterized in that: External capacitors C4 and C5 are connected between the fuse FU2 and the Vin port of the power module M2. The capacitors C4 and C5 are connected in parallel, and both capacitors C4 and C5 are electrically connected to the DC- terminal of the socket XS1 and the GND port of the power module M2. The Vin port and the +VO port of the power module M2 are electrically connected through capacitor CY1, and the GND port and the -VO port of the power module M2 are electrically connected through capacitor CY2. The POUT port of the voltage limiting module M1, capacitor C3, and GND port of the voltage limiting module M1 are connected in series. An external capacitor C2 and a 5V terminal are connected between the POUT port of the voltage limiting module M1 and capacitor C3. The capacitor C2 is electrically connected between capacitor C3 and GND port of the voltage limiting module M1. The connection between capacitor C3 and GND port of the voltage limiting module M1 is grounded.
3. The intrinsically safe 5G industrial router according to claim 2, characterized in that: The voltage limiting module M1 includes a Zener diode D9 and a thyristor Q6. The PIN port and POUT port of the voltage limiting module M1 are connected in series through an inductor B1. The two GND ports of the voltage limiting module M1 are connected in series. One end of the Zener diode D9 is electrically connected between the PIN port of the voltage limiting module M1 and the inductor B1, and the other end of the Zener diode D9 is electrically connected between the two GND ports of the voltage limiting module M1 through the resistor R50. The A terminal of the thyristor Q6 is electrically connected between the PIN port of the voltage limiting module M1 and the inductor B1, and the K terminal of the thyristor Q6 is electrically connected between the two GND ports of the voltage limiting module M1; the G terminal of the thyristor Q6 is electrically connected between the Zener diode D9 and the resistor R50 through the resistor R51.
4. The intrinsically safe 5G industrial router according to claim 3, characterized in that: The voltage limiting module M1 also includes a Zener diode D10 and a thyristor Q7; One end of the Zener diode D10 is electrically connected between the PIN port of the voltage limiting module M1 and the inductor B1, and the other end of the Zener diode D10 is electrically connected between the two GND ports of the voltage limiting module M1 through the resistor R52. The A terminal of the thyristor Q7 is electrically connected between the PIN port of the voltage limiting module M1 and the inductor B1, and the K terminal of the thyristor Q7 is electrically connected between the two GND ports of the voltage limiting module M1; the G terminal of the thyristor Q7 is electrically connected between the Zener diode D10 and the resistor R52 through the resistor R53. The voltage limiting module M1 has two external capacitors C20 and C21 connected between its two GND ports. The other end of capacitor C20 is electrically connected between resistors R50 and R51, and the other end of capacitor C21 is electrically connected between resistors R52 and R53.
5. The intrinsically safe 5G industrial router according to claim 1, characterized in that: The 5G communication module circuit (2) includes a 5G baseband chip M4, and the multi-network redundancy unit circuit (3) includes a plug-in network port J1. Several isolation transformers are connected in parallel between the G1 port and the G2 port of the plug-in network port J1, and the 5G baseband chip M4 is electrically connected to the isolation transformers.
6. The intrinsically safe 5G industrial router according to claim 5, characterized in that: The protocol conversion circuit (4) includes an integrated RS485 interface M6 and an isolated transceiver module M5; The VCC port, capacitor C17, and GND port of the isolated transceiver module M5 are connected in series. The capacitor C17 and the GND port of the isolated transceiver module M5 are grounded. An external 5V terminal is connected between the VCC port of the isolated transceiver module M5 and the capacitor C17. The RGND port of the isolated transceiver module M5 is connected in series with the RGND port of the integrated RS485 interface M6. The A port of the isolated transceiver module M5 is connected to the A / H port of the integrated RS485 interface M6 through the TXA1 wiring. The B port of the isolated transceiver module M5 is connected to the B / L port of the integrated RS485 interface M6 through the TXB1 wiring. The 485ACANH port of the integrated RS485 interface M6 is connected to the 3rd interface of the socket XS1 through the RS485A1 wiring. The 485BCANL port of the integrated RS485 interface M6 is connected to the 4th interface of the socket XS1 through the RS485B1 wiring. The TXD port of the isolated transceiver module M5 is connected to the UARTO_TX port of the 5G baseband chip M4 via the TXD0 wiring, and the RXD port of the isolated transceiver module M5 is connected to the UARTO_RX port of the 5G baseband chip M4 via the RXD0 wiring.
7. The intrinsically safe 5G industrial router according to claim 6, characterized in that: The protocol conversion circuit (4) also includes an integrated RS485 interface M8 and an isolated transceiver module M7; The VCC port, capacitor C19, and GND port of the isolated transceiver module M7 are connected in series. The capacitor C19 and the GND port of the isolated transceiver module M7 are grounded. A 5V terminal is connected between the VCC port of the isolated transceiver module M7 and the capacitor C19. The RGND port of the isolated transceiver module M7 is connected in series with the RGND port of the integrated RS485 interface M8. The A port of the isolated transceiver module M7 is connected to the A / H port of the integrated RS485 interface M8 through the TXA2 wiring. The B port of the isolated transceiver module M7 is connected to the B / L port of the integrated RS485 interface M8 through the TXB2 wiring. The 485ACANH port of the integrated RS485 interface M8 is connected to the 5th interface of the socket XS1 through the RS485A2 wiring. The 485BCANL port of the integrated RS485 interface M8 is connected to the 6th interface of the socket XS1 through the RS485B2 wiring. The TXD port of the isolated transceiver module M7 is connected to the TX1 / PWM1 port of the motherboard chip M3 via the TX1 wire, and the RXD port of the isolated transceiver module M7 is connected to the TX1 / PWM1 port of the motherboard chip M3 via the RX1 wire.
8. The intrinsically safe 5G industrial router according to claim 5, characterized in that: The L_RX1+ port of the 5G baseband chip M4 is connected to the RXPO port of the motherboard chip M3 through resistor R10. The L_RX1- port of the 5G baseband chip M4 is connected to the RXNO port of the motherboard chip M3 through resistor R11. The L_TX1+ port of the 5G baseband chip M4 is connected to the TXPO port of the motherboard chip M3 through resistor R12. The L_TX1- port of the 5G baseband chip M4 is connected to the TXNO port of the motherboard chip M3 through resistor R13.