Circuit board and gateway device

Abstract

The utility model relates to the technical field of Internet of Things gateways, and discloses a circuit board and a gateway device.The circuit board is provided with three rows of first mounting holes, and the number of the first mounting holes in the first row and the number of the first mounting holes in the third row are both smaller than the number of the first mounting holes in the second row; the first mounting holes in the first column and the second column are used for mounting first network port connectors; the first mounting holes in the second column and the third column are used for mounting second network port connectors; the circuit board is also provided with three columns of second mounting holes; the number of the first column of second mounting holes and the number of the third column of second mounting holes are greater than the number of the second column of second mounting holes; the first column of second mounting holes and the second column of second mounting holes are used for mounting first communication interface connectors; and the second mounting holes in the second column and the third column are used for mounting second communication interface connectors. The circuit board can be applied to gateway devices with high performance and gateway devices with common performance, and gateway devices with different performances can share the same shell so as to be convenient to process and produce.

Description

Technical Field

[0001] This application relates to the field of Internet of Things (IoT) gateway technology, specifically to a circuit board and gateway device. Background Technology

[0002] Smart IoT gateway devices (or simply gateway devices) are the most widely used equipment in industrial fields. They collect data from downstream devices, such as sensors and water / electricity meters, and then forward this data to an IoT platform for processing via the gateway's networking capabilities. Different industrial environments require gateway devices with varying performance. For example, in outdoor environments, lightning protection devices are needed to prevent lightning interference and improve the gateway's lightning resistance. In indoor environments, where lightning interference is minimal, lightning protection devices are unnecessary.

[0003] The problem that needs to be solved is how to configure the circuit board in a gateway device so that it can be used in both high-performance and ordinary-performance gateway devices, and that gateway devices of different performance levels can share the same housing for ease of manufacturing. Utility Model Content

[0004] In view of the above problems, this application provides a circuit board and a gateway device to solve the problem in the prior art of lacking a circuit board that can be used for both high-performance gateway devices and ordinary-performance gateway devices.

[0005] According to one aspect of the embodiments of this application, a circuit board is provided. A first region of the circuit board has three columns of first mounting holes for mounting network connectors. The first column of first mounting holes and the second column of first mounting holes form a first group of first mounting holes, and the second column of first mounting holes and the third column of first mounting holes form a second group of first mounting holes. The number of first mounting holes in the first column and the number of first mounting holes in the third column are both less than the number of first mounting holes in the second column. The first group of first mounting holes is used to mount a first network connector, so that the circuit board can be connected to a first network port module through the first network connector. The second group of first mounting holes is used to mount a second network connector, so that the circuit board can be connected to a second network port module through the second network connector. The first network port module has stronger anti-signal crosstalk and anti-electromagnetic interference capabilities than the second network port module. The second region of the circuit board... The circuit board has three rows of second mounting holes for mounting communication interface connectors, wherein the second region does not overlap with the first region; the first row of second mounting holes and the second row of second mounting holes form a first group of second mounting holes, and the second row of second mounting holes and the third row of second mounting holes form a second group of second mounting holes; the number of the first row of second mounting holes and the number of the third row of second mounting holes are both greater than the number of the second row of second mounting holes; the first group of second mounting holes is used to mount a first communication interface connector, so that the circuit board can be connected to a first communication interface module through the first communication interface connector; the second group of second mounting holes is used to mount a second communication interface connector, so that the circuit board can be connected to a second communication interface module through the second communication interface connector, wherein the first communication interface module has stronger anti-static and surge protection capabilities than the second communication interface module.

[0006] In one alternative embodiment, when the circuit board is applied outdoors, the circuit board is used to install the first network connector through the first set of first mounting holes and to connect to the first network module through the first network connector, and the third column of first mounting holes is left unused; when the circuit board is applied indoors, the circuit board is used to install the second network connector through the second set of first mounting holes and to connect to the second network module through the second network connector, and the first column of first mounting holes is left unused.

[0007] In one alternative embodiment, when the circuit board is used outdoors, the circuit board is used to mount the first communication interface connector through the first group of second mounting holes and to connect to the first communication interface module through the first communication interface connector, and the third column of second mounting holes is left unused; when the circuit board is used indoors, the circuit board is used to mount the second communication interface connector through the second group of second mounting holes and to connect to the second communication interface module through the second communication interface connector, and the first column of second mounting holes is left unused.

[0008] In one optional embodiment, the circuit board further includes a microcontroller; when the circuit board is used outdoors: the microcontroller is used to transmit differential signals with the first network port connector and to transmit serial signals with the first communication interface connector; the circuit board also includes a first power module, wherein the first power module is used to connect to a power source, perform voltage conversion processing on the power source to obtain a converted voltage, and provide the converted voltage to the microcontroller; when the circuit board is used indoors: the microcontroller is used to transmit differential signals with the second network port connector and to transmit serial signals with the second communication interface connector; the circuit board also includes a second power module, wherein the second power module is used to connect to a power source, perform voltage conversion processing on the power source to obtain a converted voltage, and provide the converted voltage to the microcontroller, wherein the first power module has stronger lightning interference resistance than the second power module.

[0009] In one alternative embodiment, the first column of first mounting holes includes four first mounting holes, the second column of first mounting holes includes six first mounting holes, and the third column of first mounting holes includes four first mounting holes; when the circuit board is applied outdoors: the first and second first mounting holes in the first column of first mounting holes are used to transmit a first set of differential signals between the microcontroller and the first network connector; the third and fourth first mounting holes in the first column of first mounting holes are used to transmit a second set of differential signals between the microcontroller and the first network connector; the first and sixth first mounting holes in the second column of first mounting holes are used for grounding; the second and third first mounting holes in the second column of first mounting holes are used to transmit a third set of differential signals between the microcontroller and the first network connector; the fourth and fifth first mounting holes in the second column of first mounting holes are used for grounding the microcontroller. A fourth set of differential signals is transmitted between the microcontroller and the first network port connector; the first mounting holes in the third column are left unused; when the circuit board is used indoors: the first mounting holes in the first column are left unused; the first and sixth mounting holes in the second column are used for grounding; the second and third mounting holes in the second column are used for transmitting a fifth set of differential signals between the microcontroller and the second network port connector; the fourth and fifth mounting holes in the second column are used for transmitting a sixth set of differential signals between the microcontroller and the second network port connector; the first and second mounting holes in the third column are used for transmitting a seventh set of differential signals between the microcontroller and the second network port connector; the third and fourth mounting holes in the second column are used for transmitting an eighth set of differential signals between the microcontroller and the second network port connector.

[0010] In one alternative embodiment, the first column of second mounting holes includes four second mounting holes, the second column of second mounting holes includes two second mounting holes, and the third column of second mounting holes includes four second mounting holes. When the circuit board is used outdoors: the first and second second mounting holes in the first column of second mounting holes are used to transmit a first set of serial port signals between the microcontroller and the first communication interface connector; the first and second second mounting holes in the second column of second mounting holes are used to connect to the operating power supply and ground, respectively; the third column of second mounting holes is left unused. When the circuit board is used indoors: the first column of second mounting holes is left unused; the first and second second mounting holes in the second column of second mounting holes are used to connect to the operating power supply and ground, respectively; the first and second second mounting holes in the third column of second mounting holes are used to transmit a second set of serial port signals between the microcontroller and the second communication interface connector.

[0011] According to another aspect of the embodiments of this application, a gateway device is provided, the device comprising: a circuit board as described above; a first network port connector mounted on the first group of first mounting holes of the circuit board; a first network port module connected to the first network port connector; a first communication interface connector mounted on the first group of second mounting holes of the circuit board; and a first communication interface module connected to the first communication interface connector.

[0012] According to another aspect of the embodiments of this application, a gateway device is provided, the device comprising: a circuit board as described above; a first network port connector mounted on the first set of first mounting holes of the circuit board; a first network port module connected to the first network port connector; a second communication interface connector mounted on the second set of second mounting holes of the circuit board; and a second communication interface module connected to the second communication interface connector.

[0013] According to another aspect of the embodiments of this application, a gateway device is provided, the device comprising: a circuit board as described above; a second network port connector mounted on the second group of first mounting holes of the circuit board; a second network port module connected to the second network port connector; a first communication interface connector mounted on the first group of second mounting holes of the circuit board; and a first communication interface module connected to the first communication interface connector.

[0014] According to another aspect of the embodiments of this application, a gateway device is provided, the device comprising: a circuit board as described above; a second network port connector mounted in the second group of first mounting holes on the circuit board; a second network port module connected to the second network port connector; a second communication interface connector mounted in the second group of second mounting holes on the circuit board; and a second communication interface module connected to the second communication interface connector.

[0015] In this application, the circuit board is set up in the above manner, which will not make the high-performance gateway device too large, and the gateway devices with different performance are the same size. Therefore, one housing can be used for gateway devices with different performance at the same time, which makes it convenient to produce gateway devices with different performance at the same time.

[0016] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description

[0017] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0018] Figure 1 A schematic diagram of the gateway device is shown;

[0019] Figure 2 A schematic diagram of a circuit board provided in an embodiment of this application is shown;

[0020] Figure 3 The circuit diagrams of the first power module and the second power module provided in the embodiments of this application are shown;

[0021] Figure 4 The circuit diagram of the microcontroller, the first network port module, and the second network port module provided in the embodiments of this application is shown.

[0022] Figure 5 The circuit diagram of the microcontroller, the first communication interface module, and the second communication interface module provided in the embodiments of this application is shown.

[0023] Figure 6 A schematic diagram of a first gateway device provided in an embodiment of this application is shown;

[0024] Figure 7 A schematic diagram of the second gateway device provided in an embodiment of this application is shown;

[0025] Figure 8A schematic diagram of the third gateway device provided in an embodiment of this application is shown;

[0026] Figure 9 A schematic diagram of the fourth gateway device provided in an embodiment of this application is shown.

[0027] The reference numerals in the detailed embodiments are as follows:

[0028] 1. Main control module; 2. Standard performance network port module; 3. Standard performance communication interface module; 4. High performance network port module; 5. High performance communication interface module;

[0029] 6. First gateway device; 7. Second gateway device; 8. Third gateway device; 9. Fourth gateway device;

[0030] 10. Circuit board; 11. First area; 12. Second area; 111. First mounting hole in the first column; 112. First mounting hole in the second column; 113. First mounting hole in the third column; 121. Second mounting hole in the first column; 122. Second mounting hole in the second column; 123. Second mounting hole in the third column;

[0031] 20. First network port connector; 30. First network port module; 40. First communication interface connector; 50. First communication interface module; 60. Second communication interface connector; 70. Second communication interface module; 80. Second network port connector; 90. Second network port module. Detailed Implementation

[0032] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0034] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0035] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, representing any combination of the listed objects. For example, "A and / or B" can represent three possibilities: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0037] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0038] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0039] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0040] The gateway device includes a main control module, a network port module, and a communication interface module. The communication interface module collects data from southbound sub-devices, such as sensors and water / electricity meters, and transmits the collected data to the main control module. The main control module receives the data from the communication interface module and transmits it to the IoT platform via the network port module. To facilitate control of the gateway device's data collection, users can send data collection commands to the main control module via the IoT platform and the network port module. Upon receiving the data collection command, the main control module controls the communication interface module to collect data according to the command.

[0041] When gateway devices are used in outdoor environments, they are susceptible to lightning interference. Therefore, it is necessary to configure lightning-resistant devices for the network port modules and communication interface modules to obtain high-performance network port modules and high-performance communication interface modules. This improves the stability and reliability of signal transmission in the gateway device and enables long-distance data transmission. When gateway devices are used in indoor environments, they are less susceptible to lightning interference. Therefore, it is not necessary to configure lightning-resistant devices for the network port modules and communication interface modules; ordinary performance network port modules and ordinary performance communication interface modules can meet the requirements.

[0042] Because high-performance network port modules and high-performance communication interface modules have additional components for lightning protection compared to ordinary performance network port modules and ordinary performance communication interface modules, the number of components in high-performance network port modules and high-performance communication interface modules is greater than that in ordinary performance network port modules and ordinary performance communication interface modules. Consequently, the volume of high-performance network port modules and high-performance communication interface modules is greater than that of ordinary performance network port modules and ordinary performance communication interface modules, respectively.

[0043] Figure 1 A schematic diagram of the gateway device is shown. Figure 1 As shown in the diagram, (a) includes a main control module 1, a standard performance network port module 2, and a standard performance communication interface module 3. (b) includes a main control module 1, a high-performance network port module 4, and a high-performance communication interface module 5. Figure 1 It is known that if the design of the main control module 1 is not changed, the size of the gateway device configured with the high-performance network port module 4 and the high-performance communication interface module 5 will be larger than the size of the gateway device configured with the ordinary performance network port module 2 and the ordinary performance communication interface module 3. This means that the two types of gateway devices cannot share the same shell. Therefore, it is necessary to design shells for the two types of gateway devices separately, which is not conducive to the simultaneous mass production of the two types of gateway devices.

[0044] Since the main control module, network port module, and communication interface module in the gateway device are all connected by connectors, the installation position of the connectors will affect the size of the gateway device. The installation position of the connectors is related to the position of the connector mounting holes on the circuit board in the main control module.

[0045] Based on this, this application proposes a circuit board with three rows of first mounting holes for mounting network connectors in the control board. The number of first mounting holes in the first and third rows is less than the number of first mounting holes in the second row. The first and second rows of first mounting holes are used to mount first network connectors, allowing the circuit board to connect to a high-performance network module via the first network connector. The second and third rows of first mounting holes are used to mount second network connectors, allowing the circuit board to connect to a standard-performance network module via the second network connector. The circuit board also has three rows of second mounting holes for mounting communication interface connectors. The number of second mounting holes in the first and third rows is greater than the number of second mounting holes in the second row. The first and second rows of second mounting holes are used to mount first communication interface connectors, allowing the circuit board to connect to a high-performance communication interface module via the first communication interface connector. The second and third rows of second mounting holes are used to mount second communication interface connectors, allowing the circuit board to connect to a standard-performance communication interface module via the second communication interface connector. In this application, the circuit board of the main control module is configured in the above manner, and the size of gateway devices with different performance levels is the same. Therefore, a single casing can be used for gateway devices with different performance levels, facilitating the simultaneous production of gateway devices with different performance levels. The circuit board provided in this application will be described in detail below with reference to the accompanying drawings.

[0046] Figure 2 A schematic diagram of a circuit board provided in an embodiment of this application is shown. For example... Figure 2As shown, circuit board 10 is the circuit board in the main control module. The first area 11 of circuit board 10 has three columns of first mounting holes for installing network connectors, from left to right: a first column of first mounting holes 111, a second column of first mounting holes 112, and a third column of first mounting holes 113. The first column of first mounting holes 111 and the second column of first mounting holes 112 form a first group of first mounting holes, and the second column of first mounting holes 112 and the third column of first mounting holes 113 form a second group of first mounting holes. The number of first mounting holes 111 in the first column and the number of first mounting holes 113 in the third column are both less than the number of first mounting holes 112 in the second column. The diagram only illustrates examples where the first column of first mounting holes 111 includes four first mounting holes, the second column of first mounting holes 112 includes six first mounting holes, and the third column of first mounting holes 113 includes four first mounting holes. The number of first mounting holes in each column is not limited, as long as the number of first mounting holes in the first group and the number of first mounting holes in the second group are sufficient for installing network connectors.

[0047] In this application, the first set of first mounting holes is used to install a first network port connector, so that the circuit board 10 can be connected to the first network port module through the first network port connector. The first network port module is provided with a mating connector for mates with the first network port connector. The first network port module mates with the first network port connector through its mating connector, thereby achieving the connection between the circuit board 10 and the first network port module. In this application, "mates" can refer to methods such as plugging, magnetic attraction, etc.

[0048] The second set of first mounting holes is used to install the second network port connector, so that the circuit board 10 can be connected to the second network port module through the second network port connector. The first network port module has stronger anti-signal crosstalk and anti-electromagnetic interference capabilities than the second network port module. That is, in this application, the first network port module is a high-performance network port module, which is equipped with devices for lightning protection, etc., while the second network port module is a general-purpose network port module.

[0049] In this embodiment of the application, by Figure 2It can be seen that when the first network connector is installed in the first set of first mounting holes (the first row of first mounting holes 111 and the second row of first mounting holes 112 in the first area 11), the third row of first mounting holes 113 is left empty. The first network module connects to the first network connector through its set mating connector, thereby connecting the circuit board 10 to the first network module. In this case, the A1B1C1D1 space in the first network module can be used to arrange components and PCB traces. When the second network connector is installed in the second set of first mounting holes (the second row of first mounting holes 112 and the third row of first mounting holes 113 in the first area 11), the first row of first mounting holes 111 is left empty. The second network module connects to the second network connector through its set connector, thereby connecting the circuit board 10 to the second network module. In this case, the C1D1E1F1 space in the second network module can be used to arrange components and PCB traces. Because the space A1B1C1D1 is larger than the space C1D1E1F1, the first network port module can accommodate more devices than the second network port module, and the first network port module can utilize more space for PCB routing. For example, the first network port module can accommodate more devices for lightning protection, thus making its performance superior to that of the second network port module. Therefore, using the circuit board 10 provided in this application as the main control module circuit board in the gateway device, when the high-performance network port module (first network port module) and the ordinary-performance network port module (second network port module) are connected to this circuit board, the size of the gateway device remains the same, and there is no situation where the size of the gateway device increases due to the connection of the main control module to the high-performance network port module.

[0050] As previously described, the high-performance network port module is equipped with a connector for mating with the first network port connector, while the ordinary performance network port module is equipped with a connector for mating with the second network port connector. If the first mounting holes in the first area 11 of the circuit board 10 are configured as a 5×5 array, then the only difference between the first set of first mounting holes and the second set of first mounting holes is their position, while the connectors for the high-performance network port module and the ordinary performance network port module are the same. Therefore, the high-performance network port module can mate with the first and second network port connectors through its connector, and similarly, the ordinary performance network port module can also mate with the first and second network port connectors through its connector. However, during the production of gateway devices, it is possible that a high-performance network port module should be installed but an ordinary performance network port module is mistakenly installed, or vice versa.

[0051] To avoid the aforementioned situation, in this embodiment, the first set of first mounting holes and the second set of first mounting holes share a second column of first mounting holes 112. This places the four first mounting holes in the first set of first mounting holes on the left side of the first set of first mounting holes, and the four first mounting holes in the second set of first mounting holes on the right side of the second set of first mounting holes. Therefore, the four-pin connector in the corresponding high-performance network port module is on the left, and the four-pin connector in the corresponding ordinary performance network port module is on the right. In other words, the number of pins on the left and right connectors in the high-performance network port module and the ordinary performance network port module are different. Therefore, during the production of the gateway device, the high-performance network port module cannot be matched with the second network port connector through its connector, and the ordinary performance network port module cannot be matched with the first network port connector through its connector, thereby preventing mis-installation.

[0052] like Figure 2 As shown, the second region 12 of the circuit board 10 has three rows of second mounting holes for mounting communication interface connectors. From left to right, these are the first row of second mounting holes 121, the second row of second mounting holes 122, and the third row of second mounting holes 123. The first row of second mounting holes 121 and the second row of second mounting holes 122 form a first group of second mounting holes, and the second row of second mounting holes 122 and the third row of second mounting holes 123 form a second group of second mounting holes.

[0053] The number of second mounting holes 121 in the first column and the number of second mounting holes 123 in the third column are both greater than the number of second mounting holes 122 in the second column. The diagram only illustrates examples where the first column of second mounting holes 121 includes four second mounting holes, the second column of second mounting holes 122 includes two second mounting holes, and the third column of second mounting holes 123 includes four second mounting holes. The diagram does not limit the number of second mounting holes in each column, as long as the number of second mounting holes in both the first and second groups is sufficient for installing the communication interface connector.

[0054] In this application, the first set of second mounting holes is used to install a first communication interface connector, so that the circuit board 10 can be connected to the first communication interface module through the first communication interface connector. The first communication interface module is provided with a mating connector that mates with the first communication interface connector. The circuit board 10 and the first communication interface module are connected by mating with the first communication interface connector through the first communication interface module's mating connector.

[0055] The second set of second mounting holes is used to install the second communication interface connector, so that the circuit board 20 can be connected to the second communication interface module through the second communication interface connector. The first communication interface module has stronger anti-static and surge protection capabilities than the second communication interface module. That is, in this application, the first communication interface module is a high-performance communication interface module, which is equipped with devices for anti-static purposes, while the second communication interface module is a general-purpose communication interface module.

[0056] In this embodiment of the application, by Figure 2 It can be seen that when the first communication interface connector is installed in the first set of second mounting holes (the first column of second mounting holes 121 and the second column of second mounting holes 122 in the second area 12), the third column of second mounting holes 123 is left empty. The first communication interface module connects to the first communication interface connector through its designated mating connector, thereby connecting the circuit board 10 to the first communication interface module. In this case, the A2B2C2D2 space can be used to arrange components and PCB traces in the first communication interface module. When the second communication interface module is installed in the second set of second mounting holes (the second column of second mounting holes 122 and the third column of second mounting holes 123 in the second area 12), the first column of second mounting holes 121 is left empty. The second communication interface module connects to the second communication interface connector through its designated mating connector, thereby connecting the circuit board 20 to the second communication interface module. In this case, the C2D2E2F2 space can be used to arrange components and PCB traces in the second communication interface module. Because the A2B2C2D2 space is larger than the C2D2E2F2 space, the first communication interface module can accommodate more devices than the second communication interface module, and the first communication interface module can utilize more space for PCB traces. For example, the first communication interface module can accommodate more anti-static devices, thus making its performance superior to that of the second communication interface module. Therefore, using the circuit board 10 provided in this application as the main control module circuit board in the gateway device, when the high-performance communication interface module (first communication interface module) and the ordinary-performance communication interface module (second communication interface module) are connected to this circuit board, the size of the gateway device remains the same, and there is no situation where the size of the gateway device increases due to the connection of the main control module to the high-performance communication interface module. Furthermore, since the gateway devices with different performance characteristics have the same size, this application can accommodate gateway devices with different performance characteristics simply by providing a single housing.

[0057] Furthermore, in this embodiment, by sharing two rows of second mounting holes in both the first and second groups, the two rows of second mounting holes in the first group are on the right, and the two rows of second mounting holes in the second group are on the left. Therefore, the two-pin connectors in the corresponding high-performance communication interface module are on the right, and the two-pin connectors in the corresponding ordinary performance communication interface module are on the left. In other words, the number of pins on the left and right connectors in the high-performance and ordinary performance communication interface modules are different. Therefore, during the production of the gateway device, the high-performance communication interface module cannot be matched with the second communication interface connector through its connector, and the ordinary performance communication interface module cannot be matched with the first communication interface connector through its connector, thus preventing mis-installation.

[0058] When the gateway device operates outdoors, to facilitate the main control module's control of the communication interface module and improve the gateway device's performance so that it can operate normally in outdoor environments such as thunderstorms, in this embodiment, the circuit board 10 of the main control module is further equipped with a microcontroller and a first power supply module. The microcontroller transmits differential signals to the first network port module via a first network port connector, and transmits serial port signals to the first communication interface module via a first communication interface connector. The first power supply module is a high-performance power supply module with strong lightning protection. After connecting to an external power source, the first power supply module performs voltage conversion processing on the connected power source to obtain a converted voltage, and provides the converted voltage to the microcontroller to provide operating power.

[0059] When the control module in the gateway device operates indoors, a standard performance power supply module (second power supply module) in the circuit board 10 of the main control module is sufficient to meet the requirements. After the second power supply module is connected to an external power source, it performs voltage conversion processing on the connected power source to obtain the converted voltage, and provides the converted voltage to the microcontroller to provide operating power to the microcontroller.

[0060] Figure 3 The diagram shows circuit schematics of the first power module and the second power module provided in an embodiment of this application. Figure 3 As shown, Figure 3D15, L7, U13, and C149 form the circuit for the second power supply module, while the remaining components form the circuit for the first power supply module. D15 is a Schottky diode; its P-terminus is electrically connected to the V1+ power input, and its N-terminus is electrically connected to pin 1 of the common-mode inductor L7. The primary function of D15 is to prevent reverse connection; if V1+ and V1- are reversed, power supply will fail, protecting the subsequent circuitry. The common-mode inductor L7 can suppress common-mode electromagnetic interference signals and electromagnetic radiation, improving power input quality and significantly enhancing system stability. Its basic principle is that when a common-mode current flows through the common-mode inductor L7, the currents in both coils are in the same direction, resulting in superposition of magnetic flux and a significant increase in inductance. For differential-mode signals, since the currents in the two coils are in opposite directions, the resulting magnetic fluxes cancel each other out, making the inductance almost zero.

[0061] Figure 3 In this circuit, C1, CY1, and CY2 are all high-voltage ceramic capacitors, primarily used to eliminate high-frequency interference, bypass high voltage, and provide circuit stability. Their working principle is based on the electric field effect. When a capacitor is connected to a circuit and powered on, charge flows from the power source into one electrode of the capacitor, establishing an electric field between the two electrodes. When transmitting a signal in the circuit, charge similarly flows into one electrode of the capacitor under the power source's drive, further creating an electric field between the electrodes to transmit the signal. During this process, the capacitor stores charge through its electric field and releases this charge at the end of signal transmission, thus ensuring the stability of signal transmission. Specifically, when a signal in the circuit reaches the ceramic capacitor, it accumulates a certain amount of charge in the electric field; when the signal reaches the other end of the capacitor, this charge is released, completing the signal transmission. During this period, the capacitor's electric field continuously stores and releases charge, thus achieving smooth signal transmission.

[0062] The circuit composed of RV3, RV2, RV4, and GD1 primarily functions for lightning protection. Lightning intrusion initially manifests as overvoltage. When a discharge path exists (in this embodiment, there are three discharge paths: V1+>RV3>V1-, V1+>RV2>GD1, V1->RV2>GD1), the varistor RV3, RV2, and RV4 are voltage-limiting devices. When an operating voltage is applied across RV3, its resistance is very high, and the leakage current is in the μA range. As the terminal voltage increases, the varistor resistance decreases. After the terminal voltage exceeds the clamping voltage, the resistance drops sharply, and the leakage current can reach as high as 20–40 kA, forming a lightning discharge path. When the voltage drops back to the operating voltage, the leakage current of the varistor rapidly decreases, returning to its original state.

[0063] Figure 3RV3 primarily suppresses differential-mode surges. The circuit composed of RV2, RV4, and GD1 suppresses common-mode surges. The principle is that the gas discharge tube is a switching device. When the voltage applied across the gas discharge tube is less than the trigger voltage, the gas discharge tube is in an open-circuit state, with virtually no leakage current. When the voltage is higher than the trigger voltage, the gas gap breaks down, which can be considered a short circuit. When the voltage across it drops below the operating voltage, the gas gap cannot extinguish the arc, and current continues to flow. Simultaneously, because the residual voltage of the discharge tube is small, it does not affect subsequent circuits.

[0064] Figure 3 The main function of D1 is to prevent reverse connection, which is the same as the function and principle of D15 mentioned above. Figure 3 The circuit composed of L2, L1, and D2 primarily functions to suppress Electrical Fast Transient (EFT) noise. EFT is a common transient interference found in electrical and electromechanical equipment, caused by inductive devices such as relays, contactors, motors, and transformers. This interference appears as a series of extremely short but large-amplitude pulses, which can accumulate at the circuit input, exceeding the circuit's noise threshold and thus interfering with its normal operation. Due to its wide amplitude range, high pulse frequency, fast rise time of individual pulses, and varying pulse durations, digital circuits are often highly sensitive to it and therefore easily affected. The common-mode inductor effectively suppresses common-mode noise by providing a high-impedance path for common-mode signals and a low-impedance path for differential-mode signals.

[0065] Specifically, high impedance path: Common-mode signals have the same amplitude and phase on both signal lines, and the magnetic fields they generate on the common-mode inductor cancel each other out. Therefore, the common-mode inductor presents high impedance to the common-mode signal. This means that high-frequency noise is suppressed more effectively. Low impedance path: For differential-mode signals, because they are asymmetrical in each direction of the signal line, they do not generate mutually canceling magnetic fields in the common-mode inductor. Therefore, differential-mode signals present low impedance on the common-mode inductor, allowing them to pass through unaffected. TVS diode D2 utilizes the avalanche breakdown characteristic of semiconductor materials. When the voltage in the circuit exceeds its set threshold, the TVS diode rapidly transitions from a high-resistance state to a low-resistance state, quickly discharging the overvoltage to ground, thus protecting the circuit from damage. Specifically, a TVS diode exhibits high impedance and is almost non-conductive under normal operating voltage; however, when the voltage exceeds its breakdown voltage, its impedance drops sharply, allowing a large current to pass through, limiting the voltage to a safe predetermined level, thereby protecting electronic equipment from transient voltage damage.

[0066] The first and second network port modules can be RJ45 interface modules. Figure 4 The diagram illustrates a circuit diagram of the microcontroller, the first network port module, and the second network port module provided in an embodiment of this application. Figure 4As shown, U40 is a microcontroller. The first network port module includes connectors J3 and J4, which mate with connectors in the first row of first mounting holes 111 and the second row of first mounting holes 112 on the circuit board 10 mounted in the main control module, respectively. The second network port module includes connectors J4 and J5, which mate with connectors in the second row of first mounting holes 112 and the third row of first mounting holes 113 on the circuit board 10 mounted in the main control module, respectively.

[0067] Pins 1 and 6 of connector J4 are connected to GND to provide impedance matching for the network differential lines and prevent electrical interference. Pins 3 to 5 of connector J4 are connected by default to the TX / RX differential lines required by the 100Mbps Ethernet port. Figure 4 In the diagram, P0MDIA_P / N, P0MDIB_P / N, P0MDIC_P / N, and P0MDID_P / N are four pairs of differential signals for Gigabit Ethernet, comprising two sets of TX and two sets of RX, conforming to the IEEE 802.3 standard. Specifically, when the microcontroller is connected to the first network port module, the signal P0MDIC_P / N transmitted between pins 1 and 2 of connector J3 and the microcontroller U40 is the first differential signal, and the signal P0MDID_P / N transmitted between pins 3 and 4 of connector J4 and the microcontroller U40 is the second differential signal. Similarly, the signal P0MDIA_P / N transmitted between pins 2 and 3 of connector J4 and the microcontroller U40 is the third differential signal, and the signal P0MDIB_P / N transmitted between pins 4 and 5 of connector J4 and the microcontroller U40 is the fourth differential signal. When the microcontroller is connected to the second network port module, the signal P0MDIA_P / N transmitted between pins 2 and 3 of the mating connector J4 and the microcontroller U40 is the fifth group of differential signals, and the signal P0MDID_P / N transmitted between pins 4 and 5 of the mating connector J5 and the microcontroller U40 is the fifth group of differential signals; the signal P0MDIC_P / N transmitted between pins 1 and 2 of the mating connector J5 and the microcontroller U40 is the seventh group of differential signals, and the signal P0MDID_P / N transmitted between pins 3 and 4 of the mating connector J5 and the microcontroller U40 is the eighth group of differential signals.

[0068] This explanation uses a 100Mbps Ethernet port design (using only P0MDIA_P / N and P0MDIB_P / N) as an example. These four signals on connector J4 are electrically connected to the microcontroller U40 (MT7628). The MT7826 is used here as an example only; in actual applications, the microcontroller model is not limited.

[0069] The differential signal from the MT7826, after passing through a network transformer, connects to external RJ45 connector J6. Connectors J4 and J5 together form a 100Mbps / 1Gbps Ethernet port with general protection capabilities; this is the second network port module. Figure 4 J4, J5, C11-C14, T1, and J6 are included. Network transformers are essential devices providing basic signal isolation, general lightning protection, and impedance matching. They offer signal transmission stability and reliability, enabling long-distance transmission. Because the second network port module includes fewer components, its circuit board size is smaller.

[0070] Since the first network port module is a high-performance module, it includes the following: Figure 4 The first network port module includes connector J4 and other components not mentioned above, excluding those included in the second network port module. Specifically, compared to the second network port module, the first network port module adds series resistors R7-R23 to avoid signal crosstalk and uses ESD protection chips U2 and U3. It uses a BOB-Smith circuit composed of R19, C15, and R24 to improve network port EMI performance, provide a low-impedance return path for common-mode noise, impedance matching, and surge protection.

[0071] Figure 5 The diagram illustrates a circuit diagram of the microcontroller, the first communication interface module, and the second communication interface module provided in an embodiment of this application. Figure 5 As shown, the first communication interface module includes connectors J7 and J8, which mate with connectors in the first row of second mounting holes 121 and the second row of second mounting holes 122 on the circuit board 10 of the main control module, respectively. The second communication interface module includes connectors J7 and J9, which mate with connectors in the second row of second mounting holes 122 and the third row of second mounting holes 123 on the circuit board 10 of the main control module, respectively.

[0072] When the microcontroller is connected to the first communication interface module, the signals CPU_TXD1 / CPU_RXD1 transmitted between pins 1 and 2 of the mating connector J8 and the microcontroller U40 are the first set of serial port signals. When the microcontroller is connected to the second communication interface module, the signals CPU_TXD1 / CPU_RXD1 transmitted between pins 1 and 2 of the mating connector J9 and the microcontroller U40 are the second set of serial port signals.

[0073] Both the first and second communication interface modules are equipped with a docking connector J7. Connector J7 is used to connect the first and second communication interface modules to a power supply, such as a 3.3V power supply. The power supply connected to connector J7 can be a converted voltage provided by either the aforementioned first or second power supply module.

[0074] CPU_TXD1 and CPU_RXD1 in J8 / J9 are TTL level UART serial ports, which can be recognized by the microcontroller U40 (MT7628). In this embodiment, the TTL level UART serial port is converted into the commonly used industrial RS485 interface through the conversion chip U5 to meet field requirements. Meanwhile, pins 3 and 4 of the connector J8 / J9 are reserved for connecting another serial port.

[0075] like Figure 5 As shown, the second serial port module includes connectors J7 and J9, as well as the components within the rectangular frame. The second serial port module only includes basic conversion circuitry. U16 is a level conversion chip that converts between TTL and RS485 serial port levels. The basic principle is as follows: Data reception: When no data is being transmitted, CPU_TXD1 is high by default, NPN transistor Q4 is turned on, RE on U16 is low (enabled), and RO is enabled (enabled). Data reception is then transmitted to the microcontroller U40 via the RO channel, completing the data reception process. Data transmission: When data is being transmitted, CPU_TXD1 is pulled down to indicate the start of data transmission. Transistor Q4 is turned off, DE is high, and transmission is enabled. When data '0' is transmitted, it is transmitted to port AB, completing the low-level transmission. When '1' is sent, transistor Q4 is turned on, and RE and DE are both low. Theoretically, this should enable reception, but since it is still transmitting data, it is in a high-impedance state as shown in Table 1 below. This state is determined by pull-up resistor A and pull-down resistor B. At this time, AB>0 transmits '1', completing the transmission of the high level.

[0076] Table 1: Input / Output Truth Table

[0077]

[0078] The first communication network port module includes Figure 5Other components outside the rectangular frame. U4 is used as a signal isolator, and U7 as a power isolator. It also enhances the protection capability of the RS485 interface AB lines, typically through a combination of U6+D5+D4+D6, providing excellent protection against electrostatic discharge (ESD) and surges. U4 is a digital isolator used to electrically isolate signal transmission between different circuits, ensuring efficient signal transmission and system safety. In this embodiment, it provides signal isolation and anti-interference, isolating internal signals from external information. U7 is an isolated power supply, primarily used for electrical isolation, protecting system safety, and preventing interference propagation. This embodiment also provides voltage conversion, converting 3.3V to 5V. This completely isolates internal signals and power from the external environment, enhancing the product's ESD and surge protection capabilities.

[0079] Figure 6 A schematic diagram of a first gateway device provided in an embodiment of this application is shown. When the gateway device is used outdoors, in order to improve the lightning protection performance of the network port module and the communication interface module, such as... Figure 6 As shown, the first gateway device 6 includes a circuit board 10, a first network port connector 20, a first network port module 30, a first communication interface connector 40, and a first communication interface module 50. The first network port connector 20 and the first communication interface connector 40 are mounted on the circuit board 10. The first network port module 30 is connected to the first network port connector 20, and the first communication interface module 50 is connected to the first communication interface connector 40.

[0080] Figure 7 A schematic diagram of a second gateway device provided in an embodiment of this application is shown. When the gateway device is used indoors, the communication interface module is used to collect data from indoor devices. However, when the network cable connected through the network port module is laid outdoors, in order to improve the lightning protection performance of the network port module, such as... Figure 7 As shown, the second gateway device 7 includes a circuit board 10, a first network port connector 20, a first network port module 30, a second communication interface connector 60, and a second communication interface module 70. The first network port connector 20 and the second communication interface connector 60 are mounted on the circuit board 10. The first network port module 30 is connected to the first network port connector 20, and the second communication interface module 70 is connected to the second communication interface connector 60.

[0081] Figure 8A schematic diagram of a third gateway device provided in an embodiment of this application is shown. When the gateway device is used outdoors, and the network port module is connected to external network devices through a switch with strong lightning protection, a standard network port module can meet the requirements since the switch already provides protection. However, since the communication interface module is used to collect data from outdoor devices, such as data from outdoor temperature and humidity sensors, the communication network port module needs to have strong lightning protection to meet the requirements. Therefore, a high-performance communication interface module is required. Figure 8 As shown, the third gateway device 8 includes a circuit board 10, a second network port connector 80, a second network port module 90, a first communication interface connector 40, and a first communication interface module 50. The second network port connector 80 and the first communication interface connector 40 are mounted on the circuit board 10. The second network port module 90 is connected to the second network port connector 80, and the first communication interface module 50 is connected to the first communication interface connector 40.

[0082] Figure 9 A schematic diagram of a fourth gateway device provided in an embodiment of this application is shown. When the gateway device is applied indoors, such as... Figure 9 As shown, the fourth gateway device 9 includes a circuit board 10, a second network port connector 80, a second network port module 90, a second communication interface connector 60, and a second communication interface module 70. The second network port connector 80 and the second communication interface connector 60 are mounted on the circuit board 10. The second network port module 90 is connected to the second network port connector 80, and the second communication interface module 70 is connected to the second communication interface connector 60.

[0083] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of this application may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0084] Similarly, it should be understood that, in order to simplify this application and aid in understanding one or more of the various aspects of the invention, features of the embodiments of this application are sometimes grouped together in a single embodiment, figure, or description thereof in the above description of exemplary embodiments of this application. However, this method of disclosure should not be construed as reflecting an intention that the claimed application requires more features than are expressly recited in each claim.

[0085] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0086] It should be noted that the above embodiments are illustrative of this application and not limiting of it, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. This application can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

Claims

1. A circuit board, characterized in that, The first area of ​​the circuit board has three columns of first mounting holes for mounting network connectors. The first column of first mounting holes and the second column of first mounting holes form a first group of first mounting holes, and the second column of first mounting holes and the third column of first mounting holes form a second group of first mounting holes. The number of first mounting holes in the first column and the number of first mounting holes in the third column are both less than the number of first mounting holes in the second column; The first set of first mounting holes is used to install a first network port connector, so that the circuit board can be connected to the first network port module through the first network port connector; The second set of first mounting holes is used to install a second network port connector so that the circuit board can be connected to the second network port module through the second network port connector. The first network port module has stronger anti-signal crosstalk and anti-electromagnetic interference capabilities than the second network port module. The second region of the circuit board has three columns of second mounting holes for mounting communication interface connectors, wherein the second region does not overlap with the first region; the first column of second mounting holes and the second column of second mounting holes form a first group of second mounting holes, and the second column of second mounting holes and the third column of second mounting holes form a second group of second mounting holes; The number of second mounting holes in the first column and the number of second mounting holes in the third column are both greater than the number of second mounting holes in the second column. The first set of second mounting holes is used to install the first communication interface connector, so that the circuit board can be connected to the first communication interface module through the first communication interface connector; The second set of second mounting holes is used to install a second communication interface connector so that the circuit board can be connected to the second communication interface module through the second communication interface connector. The first communication interface module has stronger anti-static and surge protection capabilities than the second communication interface module.

2. The circuit board according to claim 1, characterized in that, When the circuit board is used outdoors, the circuit board is used to install the first network port connector through the first set of first mounting holes, and is used to connect to the first network port module through the first network port connector, and the third column of first mounting holes is left empty. When the circuit board is used indoors, it is used to install the second network port connector through the second set of first mounting holes, and to connect to the second network port module through the second network port connector, while the first column of first mounting holes is left unused.

3. The circuit board according to claim 1, characterized in that, When the circuit board is used outdoors, the circuit board is used to mount the first communication interface connector through the first group of second mounting holes, and is used to connect to the first communication interface module through the first communication interface connector, while the third column of second mounting holes is left unused. When the circuit board is used indoors, it is used to mount the second communication interface connector through the second set of second mounting holes, and to connect to the second communication interface module through the second communication interface connector, wherein the first column of second mounting holes is left unused.

4. The circuit board according to claim 1, characterized in that, A microcontroller is also provided on the circuit board; When the circuit board is used outdoors: The microcontroller is used to transmit differential signals with the first network port connector and to transmit serial port signals with the first communication interface connector. The circuit board is also provided with a first power module, wherein the first power module is used to connect to a power source, perform voltage conversion processing on the power source to obtain a converted voltage, and provide the converted voltage to the microcontroller; When the circuit board is used indoors: The microcontroller is used to transmit differential signals with the second network port connector and to transmit serial port signals with the second communication interface connector. The circuit board is also provided with a second power module, which is used to connect to a power source, perform voltage conversion on the power source to obtain a converted voltage, and provide the converted voltage to the microcontroller. The first power module has stronger anti-lightning interference capability than the second power module.

5. The circuit board according to claim 4, characterized in that, The first column of first mounting holes includes four first mounting holes, the second column of first mounting holes includes six first mounting holes, and the third column of first mounting holes includes four first mounting holes. When the circuit board is used outdoors: The first and second first mounting holes in the first column of the first mounting holes are used to transmit a first set of differential signals between the microcontroller and the first network connector; The third and fourth first mounting holes in the first column are used to transmit a second set of differential signals between the microcontroller and the first network connector; The first and sixth mounting holes in the second column are used for grounding; The second and third first mounting holes in the second column of the first mounting holes are used to transmit a third set of differential signals between the microcontroller and the first network connector; The fourth and fifth first mounting holes in the second column are used to transmit a fourth set of differential signals between the microcontroller and the first network connector; The first mounting hole in the third column is left unused. When the circuit board is used indoors: The first mounting hole in the first column is empty; The first and sixth mounting holes in the second column are used for grounding; The second and third first mounting holes in the second column of the first mounting holes are used to transmit a fifth set of differential signals between the microcontroller and the second network connector; The fourth and fifth first mounting holes in the second column are used to transmit a sixth set of differential signals between the microcontroller and the second network connector; The first and second first mounting holes in the third column are used to transmit a seventh set of differential signals between the microcontroller and the second network connector; The third and fourth first mounting holes in the second column are used to transmit an eighth set of differential signals between the microcontroller and the second network connector.

6. The circuit board according to claim 4, characterized in that, The first column of second mounting holes includes four second mounting holes, the second column of second mounting holes includes two second mounting holes, and the third column of second mounting holes includes four second mounting holes. When the circuit board is used outdoors: The first and second second mounting holes in the first column of second mounting holes are used to transmit a first set of serial port signals between the microcontroller and the first communication interface connector. The first and second mounting holes in the second row are used to connect to the working power supply and ground, respectively; The second mounting hole in the third column is unused; When the circuit board is used indoors: The second mounting hole in the first column is unused; The first and second mounting holes in the second row are used to connect to the working power supply and ground, respectively; The first and second second mounting holes in the third column are used to transmit a second set of serial port signals between the microcontroller and the second communication interface connector.

7. A gateway device, characterized in that, The device includes: The circuit board as described in any one of claims 1 to 6; A first network port connector is mounted in the first set of first mounting holes on the circuit board; The first network port module is connected to the first network port connector; A first communication interface connector is mounted in the first group of second mounting holes on the circuit board; The first communication interface module is connected to the first communication interface connector.

8. A gateway device, characterized in that, The device includes: The circuit board as described in any one of claims 1 to 6; A first network port connector is mounted in the first set of first mounting holes on the circuit board; The first network port module is connected to the first network port connector; The second communication interface connector is mounted in the second set of second mounting holes on the circuit board; The second communication interface module is connected to the second communication interface connector.

9. A gateway device, characterized in that, The device includes: The circuit board as described in any one of claims 1 to 6; The second network connector is installed in the second set of first mounting holes on the circuit board; The second network port module is connected to the second network port connector; A first communication interface connector is installed in the first group of second mounting holes on the circuit board; a first communication interface module is connected to the first communication interface connector.

10. A gateway device, characterized in that, The device includes: The circuit board as described in any one of claims 1 to 6; The second network connector is installed in the second set of first mounting holes on the circuit board; The second network port module is connected to the second network port connector; The second communication interface connector is installed in the second set of second mounting holes in the circuit board; the second communication interface module is connected to the second communication interface connector.

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