Master control board, programmable logic controller and automation equipment

Abstract

The application relates to a master control board, a programmable logic controller and an automatic device. The programmable logic controller comprises a first shell, a second shell, one side of the first shell or the second shell being used for mounting a guide rail, a master control board arranged in a mounting cavity, at least input and output devices, CPU devices and programmable devices being arranged on the master control board, the CPU devices and the programmable devices being located at one end of the master control board far from an expansion module, and a power board arranged in the mounting cavity and electrically connected with the master control board, one end of the power board being provided with a connecting terminal for connecting the expansion module, the connecting terminal being close to the expansion module and close to the guide rail. In this way, the number of circuit boards in the mounting cavity can be reduced, the overall cost is reduced, meanwhile, the heat generated by the expansion module during work cannot be transmitted to the CPU devices and the programmable devices, and the vibration received by the connecting terminal is reduced.

Description

[0001] Related applications

[0002] This application claims priority to Chinese patent application filed on September 23, 2024, application number 2024223181797, entitled "Programmable Logic Controller and Automation Equipment", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of automatic control technology, and in particular to a main control board, a programmable logic controller, and an automation device. Background Technology

[0004] A Programmable Logic Controller (PLC) uses a type of programmable memory to store programs internally, execute user-oriented instructions such as logic operations, sequential control, timing, counting, and arithmetic operations, and control various types of machinery or production processes through digital or analog inputs / outputs.

[0005] A programmable logic controller (PLC) system mainly consists of several parts: the housing area, the expansion card area, the internal circuitry area, the product mounting area, the display area, and the input / output terminal area. Currently, the internal circuit board in the internal circuitry area typically consists of three or more PCBs, including a power board, a CPU board, and an I / O board.

[0006] This means that at least three circuit boards are used in the internal circuit area to meet the control requirements of the programmable logic controller. Typically, at least three circuit boards are horizontally distributed, which leads to low integration of the programmable logic controller, large space occupation, and increased overall cost. Utility Model Content

[0007] Therefore, it is necessary to address the problems of low integration and large space occupation caused by the horizontal distribution of at least three circuit boards in current programmable logic controllers (PLCs). A PLC and automation equipment should be provided that can realize the integrated design of circuit boards, reduce the number of circuit boards, thereby reducing the space occupied by the circuit boards, which is conducive to the miniaturization of the whole machine. At the same time, it can also increase the integration of the whole machine and reduce the cost of the whole machine.

[0008] To achieve the above objectives, this application proposes a programmable logic controller, comprising:

[0009] First shell;

[0010] The second housing covers the first housing and together with the first housing forms an installation cavity, and one side of the first housing or the second housing is used to install the guide rail;

[0011] A main control board is disposed in the mounting cavity. At least one input / output device, a CPU device, and a programmable device are integrated on the main control board. The CPU device and the programmable device are located at the end of the main control board away from the expansion module.

[0012] A power board is disposed in the mounting cavity and electrically connected to the main control board. One end of the power board is provided with a connection terminal for connecting the expansion module. The connection terminal is close to the expansion module and close to the guide rail.

[0013] In one embodiment of this application, the main control board and the power board are parallel to the surface of the first housing, and the power board is located on the side of the main control board away from the first housing, and the power board is close to the guide rail.

[0014] In one embodiment of this application, the main control board is arranged perpendicularly to the power board, and the power board is close to the guide rail.

[0015] In one embodiment of this application, the main control board has a first region and a second region, wherein the first region is configured with the CPU device and the programmable device;

[0016] The heat generated by the device in the first region is greater than the heat generated by the device in the second region. The first region is farther away from the expansion module, and the second region is closer to the expansion module.

[0017] In one embodiment of this application, the main control board has a clearance area, and the CPU device and the programmable device are disposed corresponding to the clearance area, with the CPU device and the programmable device clearing the power board.

[0018] In one embodiment of this application, the main control board has a heat insulation channel, and the main control board has a third region and a fourth region, the third region and the fourth region being located on both sides of the heat insulation channel, and the heat generated by the device in the third region is greater than the heat generated by the device in the fourth region.

[0019] In one embodiment of this application, the first housing and / or the second housing are provided with heat dissipation holes, and the CPU device and the programmable device are disposed on the side of the main control board near the heat dissipation holes.

[0020] In one embodiment of this application, the main control board further includes a heat sink, and the CPU device and the programmable device are disposed on the heat sink.

[0021] In one embodiment of this application, the main control board has a first connector on one side and the power board has a second connector on one side, and the first connector and the second connector are correspondingly arranged and plugged into each other;

[0022] The programmable logic controller further includes a protective sleeve, which is fitted over the first connector and the second connector. The protective sleeve, the main control board, and the power board form a sealed space to accommodate the first connector and the second connector.

[0023] In one embodiment of this application, the protective sleeve is made of an elastic insulating material;

[0024] And / or, there is a preset gap between the protective sleeve and the first connector and the second connector;

[0025] And / or, the protective sleeve has a symmetrical structure;

[0026] And / or, the protective sleeve abuts against the main control board and the power board.

[0027] In one embodiment of this application, the surface of the first housing opposite to the second housing has a recessed first mounting groove and a second mounting groove, the first mounting groove and the second mounting groove being independent of each other and being disposed through the first housing along its height direction;

[0028] The first mounting slot and the second mounting slot are used to install expansion cards.

[0029] In one embodiment of this application, the inner wall of the first mounting slot has a first anti-mistake component, and the inner wall of the second mounting slot has a second anti-mistake component, wherein the first anti-mistake component and the second anti-mistake component cooperate with the mounting portion of the expansion card.

[0030] The first anti-mistake component and the second anti-mistake component have different installation positions and / or structures.

[0031] In one embodiment of this application, the opposing sidewalls of the first mounting slot and the second mounting slot have fasteners, which cooperate with the card connector of the expansion card;

[0032] And / or, the opposite sidewalls of the first mounting slot and the second mounting slot have a first guide member, the first guide member being arranged along the depth direction of the first mounting slot and the second mounting slot, and the first guide member being guided and engaged with the second guide member of the expansion card.

[0033] In one embodiment of this application, the programmable logic controller further includes a display module, the display module includes a light guide, the first housing has a through-hole, the light guide is installed in the mounting cavity, and one end of the light guide is installed in the through-hole;

[0034] The light guide includes a mounting plate and a plurality of light guide pillars. The plurality of light guide pillars are disposed on the mounting plate, and the two ends of the light guide pillars protrude from the two surfaces of the mounting plate, respectively.

[0035] In one embodiment of this application, the display module has at least one of the following:

[0036] Firstly, the light guide further includes a plurality of reinforcing ribs, the reinforcing ribs being disposed on the surface of the mounting plate facing the second housing, and a reinforcing rib being disposed between two adjacent light guide pillars, the height of the light guide pillar being greater than the height of the reinforcing rib;

[0037] Secondly, at least one surface of the mounting plate has a recessed light-transmitting groove, the light-transmitting groove being located between two adjacent light guide pillars;

[0038] Thirdly, the light guide further includes a fixing member, which is disposed on the mounting plate. The surface of the first housing facing the second housing has a mating member, and the fixing member and the mating member are correspondingly disposed and engaged in a locking manner.

[0039] Fourthly, the light guide further includes a first positioning member, which is disposed on the mounting plate. A second positioning member is disposed on the surface of the first housing facing the second housing. The first positioning member and the second positioning member are correspondingly disposed and positioned in cooperation.

[0040] Fifthly, the light guide column has an incident light surface and an exit light surface arranged opposite to each other at both ends, the incident light surface and the exit light surface are made of a high-gloss mirror material, and the side of the light guide is made of a matte material;

[0041] The sixth item is that the surface of the first housing facing the second housing also has a protruding light-blocking member, the light-blocking member surrounds the periphery of the light-transmitting hole and forms an installation channel, the installation channel communicates with the light-transmitting hole, and the light guide post passes through the installation channel and is installed in the light-transmitting hole;

[0042] The seventh item is that the longitudinal cross-sectional shape of the light guide column is polygonal, circular or elliptical, the light guide column is columnar and extends along the direction of the line connecting the first housing and the second housing;

[0043] The eighth item is that the display module further includes a display film, which is disposed on the surface of the first housing opposite to the second housing and covers the light-transmitting hole.

[0044] In one embodiment of this application, the programmable logic controller further includes a blocking member disposed between the input / output device and the main control board, so as to close the connection between the input / output device and the main control board.

[0045] An automated device includes a cabinet and a programmable logic controller as described in any of the above technical features;

[0046] The programmable logic controller is located in the cabinet.

[0047] A main control board is used for a programmable logic controller (PLC). The PLC includes a first housing and a second housing, which enclose a mounting cavity. One side of the first housing or the second housing is used for mounting a guide rail. The main control board is disposed in the mounting cavity. The main control board integrates at least an input / output device, a CPU device, and a programmable device. The CPU device and the programmable device are located at one end of the main control board away from an expansion module of the PLC. The main control board is electrically connected to a power board located on one side of the main control board. One end of the power board is provided with a connection terminal for connecting the expansion module, and the connection terminal is close to the expansion module and close to the guide rail.

[0048] In one embodiment of this application, the main control board has a clearance area, and the CPU device and the programmable device are disposed corresponding to the clearance area, with the CPU device and the programmable device clearing the power board.

[0049] In one embodiment of this application, the first housing and / or the second housing are provided with heat dissipation holes, and the CPU device and the programmable device are disposed on the side of the main control board near the heat dissipation holes.

[0050] In one embodiment of this application, the main control board further includes a heat sink, and the CPU device and the programmable device are disposed on the heat sink.

[0051] In one embodiment of this application, the main control board has a heat insulation channel, and the main control board has a fifth region and a sixth region, the fifth region and the sixth region are respectively located on both sides of the heat insulation channel, and the heat generated by the device in the fifth region is greater than the heat generated by the device in the sixth region.

[0052] In one embodiment of this application, the main control board has a first connector, and the power board has a second connector on the side facing the main control board. The first connector and the second connector are correspondingly arranged and plugged into each other.

[0053] The main control board also includes a protective sleeve, which is fitted over the first connector and the second connector. The protective sleeve can form a sealed space with the main control board and the power board to accommodate the first connector and the second connector.

[0054] In one embodiment of this application, the protective sleeve is made of an elastic insulating material;

[0055] And / or, there is a preset gap between the protective sleeve and the first connector and the second connector;

[0056] And / or, the protective sleeve has a symmetrical structure;

[0057] And / or, the protective sleeve abuts against the main control board and the power board.

[0058] By adopting the above technical solution, this application has at least the following technical effects:

[0059] This application discloses a main control board, a programmable logic controller (PLC), and an automation device. In the PLC, the main control board integrates at least input / output devices, a CPU, and a programmable device, thus combining the functions of the CPU board and the input / output board. This integration of the CPU board and input / output board into the main control board reduces the number of circuit boards in the mounting cavity, thereby reducing the space occupied by the circuit boards, facilitating miniaturization of the PLC, increasing its integration density, and reducing the overall cost. Simultaneously, the CPU and programmable devices are located away from the expansion modules, preventing heat generated by the expansion modules from being transferred to them, ensuring their performance and the reliability of the main control board. Furthermore, the connection terminals are located on the power board close to the expansion modules and the guide rails, reducing vibration and improving the reliability of the connection between the terminals and the expansion modules. Attached Figure Description

[0060] Figure 1 This is a schematic diagram showing the installation of expansion cards and expansion modules on a programmable logic controller according to an embodiment of this application.

[0061] Figure 2 for Figure 1 The diagram shows the main view of the programmable logic controller with expansion cards and modules installed.

[0062] Figure 3 for Figure 1 The diagram shown is an exploded view of a programmable logic controller.

[0063] Figure 4 for Figure 3 The diagram shown illustrates the main control board and power supply board working together in a programmable logic controller from one perspective.

[0064] Figure 5 for Figure 4 The diagram shown is a schematic of the main control board and power supply board from another perspective.

[0065] Figure 6 for Figure 4 The diagram shown is of the main control board.

[0066] Figure 7 for Figure 4 The diagram shows a partial view of the main control board at point A.

[0067] Figure 8 for Figure 4 The diagram shown is an exploded view of the main control board and power supply board.

[0068] Figure 9 for Figure 8 The diagram shows the protective sleeve and the second connector.

[0069] Figure 10 for Figure 1 The diagram shows a programmable logic controller from another perspective.

[0070] Figure 11 for Figure 10 A partial schematic diagram of a programmable logic controller is shown.

[0071] Figure 12 for Figure 1 The diagram shown is a schematic of a programmable logic controller from another perspective.

[0072] Figure 13 for Figure 3 A partial schematic diagram of the first housing in the programmable logic controller shown.

[0073] Figure 14 for Figure 1 A schematic diagram of the expansion card is shown.

[0074] Figure 15 for Figure 1 The rear view of the programmable logic controller shown.

[0075] Figure 16 for Figure 1 The diagram shows the light guide component and the first housing in the programmable logic controller.

[0076] Figure 17 for Figure 16 The diagram shows a light guide component.

[0077] Figure 18 for Figure 17 The side view of the light guide shown.

[0078] Figure 19 for Figure 17 The diagram shows one embodiment of the light guide.

[0079] Figure 20 for Figure 17 A schematic diagram of another embodiment of the light guide shown.

[0080] Figure 21 for Figure 17 A partial cross-sectional view of the light guide shown.

[0081] Figure 22 for Figure 4 The diagram shows a 3D view of the capacitors installed on the main control board.

[0082] Figure 23 for Figure 22 The diagram shows a top view of the capacitors installed on the main control board.

[0083] Wherein: 100, Programmable Logic Controller; 110, First Housing; 111, First Mounting Slot; 112, Second Mounting Slot; 113, First Anti-foolproof Component; 114, Second Anti-foolproof Component; 115, Fastener; 116, First Guide Component; 117, Light Transmitting Hole; 118, Light Blocking Component; 1181, Mounting Channel; 119, Mating Component; 1101, Second Positioning Component; 120, Second Housing; 121, First Sliding Part; 122, Heat Dissipation Hole; 130, Main Control Board; 131, Input / Output Device; 1311, Input Terminal; 1312, Output Terminal; 132, CPU Device; 133, First Connector; 134, Heat Insulation Channel; 135, Capacitor; 136, ... 1. Pin; 136. Barrier; 1301. First region; 1302. Second region; 1303. Third region; 1304. Fourth region; 140. Power board; 141. Second connector; 150. Protective sleeve; 160. Light guide; 161. Mounting plate; 1611. Light transmission groove; 162. Light guide post; 1621. Light entrance surface; 1622. Light exit surface; 163. Reinforcing rib; 164. Fixing component; 165. First positioning component; 170. Mounting assembly; 180. Barrier; 200. Expansion module; 210. Second sliding part; 300. Expansion card; 310. Mounting part; 320. Snap-fit ​​component; 330. Second guide component; 400. Guide rail. Detailed Implementation

[0084] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0085] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0086] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0087] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0088] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0089] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0090] Understandably, a programmable logic controller (PLC) system mainly consists of several parts: the housing area, the expansion card area, the internal circuitry area, and the product mounting area. Currently, the internal circuit boards in the internal circuitry area typically consist of three or more PCBs, such as a power board, a CPU board, and an I / O board. Usually, at least three PCBs are horizontally distributed, which leads to low integration of the PLC, large space occupation, and increased overall cost.

[0091] See Figures 1 to 3 Therefore, this application provides a programmable logic controller 100. Figure 1 A schematic diagram showing the installation of an expansion card 300 and an expansion module 200 on a programmable logic controller 100 according to an embodiment of this application. Figure 2 for Figure 1 The diagram shows the front view of the programmable logic controller 100 with the expansion card 300 and expansion module 200 installed. Figure 3 for Figure 1 The diagram shows an exploded view of the programmable logic controller 100. This programmable logic controller 100 is used in automated equipment to achieve automated control of the equipment.

[0092] The programmable logic controller 100 can integrate circuit boards, reducing the number of circuit boards and thus reducing the space occupied by the circuit boards, which is conducive to the miniaturization design of the programmable logic controller 100. At the same time, it can also increase the integration degree of the programmable logic controller 100 and reduce the overall cost. The following describes the specific structure of a programmable logic controller 100 according to an embodiment.

[0093] See Figures 1 to 7In one embodiment, the programmable logic controller 100 includes a first housing 110, a second housing 120, a main control board 130, and a power supply board 140. The second housing 120 covers the first housing 110 and together with the first housing 110 forms a mounting cavity. One side of the first housing 110 or the second housing 120 is used to mount a guide rail 400. The main control board 130 is disposed in the mounting cavity and integrates at least an input / output device 131, a CPU device 132, and a programmable device. The CPU device 132 and the programmable device are located at the end of the main control board 130 away from the expansion module 200. The power supply board 140 is disposed in the mounting cavity and is electrically connected to the main control board 130. One end of the power supply board 140 is provided with a connection terminal for connecting to the expansion module 200, and the connection terminal is close to the expansion module 200 and close to the guide rail 400. Figure 4 for Figure 3 The diagram shown illustrates the main control board 130 and power supply board 140 of the programmable logic controller 100 from one perspective. Figure 5 for Figure 4 The schematic diagram of the main control board 130 and power supply board 140 shown from another perspective. Figure 6 for Figure 4 The schematic diagram of the main control board 130 shown is as follows. Figure 7 for Figure 4 A partial schematic diagram of the main control board 130 at point A.

[0094] The first housing 110 and the second housing 120 enclose a mounting cavity, forming the mounting housing of the programmable logic controller 100. Figure 1 As shown, the front housing of the programmable logic controller 100 is the first housing 110, and the rear housing is the second housing 120. The surface of the first housing 110 is the front of the programmable logic controller 100, and the surface of the second housing 120 is the back of the programmable logic controller 100.

[0095] It is worth noting that the up, down, left, right, front, and back directions in this application are based on... Figure 1 The directions shown are for reference only and will not be described again later. The first housing 110 and the second housing 120 also extend along the left-right direction and the height direction. The first housing 110 and the second housing 120 are arranged in a hexahedral structure, and the cavity inside is the mounting cavity.

[0096] One side of the first housing 110 or the second housing 120 is used to mount a guide rail 400. This guide rail 400 enables the installation of the programmable logic controller 100. Simultaneously, the guide rail 400 can also slidably mount an expansion module 200, allowing for detachable installation onto the programmable logic controller 100. It is understood that the expansion module 200 refers to an additional module used to increase the number of modules or functionality when the number of modules included with the programmable logic controller 100 is limited. The expansion module 200 can increase the input / output capabilities or other specific functions of the programmable logic controller 100 to meet the performance requirements of the programmable logic controller 100.

[0097] See Figures 3 to 7 The main control board 130 and the power supply board 140 are the circuit boards of the programmable logic controller 100, and are disposed in the mounting cavity enclosed by the first housing 110 and the second housing 120. The power supply board 140 is electrically connected to the main control board 130. The power supply board 140 is used to provide power to the entire programmable logic controller 100, and the main control board 130 is the control motherboard of the programmable logic controller 100, through which the overall control of the programmable logic controller 100 is realized.

[0098] The power board 140 is electrically connected to the main control board 130, and supplies power to the main control board 130 through the power board 140. Moreover, the main control board 130 integrates at least input / output devices 131, CPU devices 132, and programmable devices. That is, the main control board 130 integrates the devices on the input / output board (IO board) and the CPU board, so that the main control board 130 has the functions of an input / output board and a CPU board, reducing the number of circuit boards. This can reduce the cost of circuit boards and also reduce the space occupied by the circuit boards, making the layout of each device more compact.

[0099] See Figures 3 to 7 Furthermore, the CPU device 132 and the programmable device are located at the end of the main control board 130 away from the expansion module 200. Understandably, the CPU device 132 and the programmable device generate a lot of heat during operation. Moreover, after the programmable logic controller 100 is connected to the expansion module 200, the expansion module 200 also generates a lot of heat during operation. This heat will be transferred into the mounting cavity, and thus add to the heat generated by the CPU device 132 and the programmable device, affecting the power density of the main control board 130, affecting the performance of the heat-generating components, and consequently affecting the performance of the main control board 130.

[0100] Therefore, this application positions the CPU device 132 and the programmable device on the side of the main control board 130 away from the expansion module 200, so that the CPU device 132 and the programmable device are far apart from the expansion module 200. Figure 1 and Figure 2As shown, the expansion module 200 is located on the right side of the main control board 130, and the CPU device 132 and the programmable device are located on the left side of the main control board 130. That is, the CPU device 132 and the programmable device and the expansion module 200 are respectively arranged on the left and right sides, so that there is a certain distance between the CPU device 132 and the programmable device and the expansion module 200.

[0101] In this way, the CPU device 132 and the programmable device are not placed close to the expansion module 200. Even if the heat generated by the expansion module 200 during operation is transferred to the mounting cavity, because the CPU device 132 and the programmable device are far apart from the expansion module 200, the heat from the expansion module 200 will not be transferred to the CPU device 132 and the programmable device. In other words, the heat from the expansion module 200 has a small impact on the heat of the CPU device 132 and the programmable device, thereby reducing the power consumption of the CPU device 132 and the programmable device and ensuring the power density of the main control board 130.

[0102] Meanwhile, because the CPU device 132 and the programmable device are far apart from the expansion module 200, the heat generated by the CPU device 132 and the programmable device during operation will not be transferred to the expansion module 200 outside the mounting cavity. In other words, the heat from the CPU device 132 and the programmable device has a small impact on the expansion module 200, so as to ensure the performance of the expansion module 200 and thus ensure the performance of the programmable logic controller 100 after its function is expanded.

[0103] Furthermore, the power board 140 is equipped with connection terminals that can be connected to an expansion module to enable power supply and signal transmission. Understandably, when the programmable logic controller 100 is used in high-vibration conditions, the connection between the connection terminals and the expansion module 200 will be subject to vibration, affecting the reliability of the connection.

[0104] Therefore, this application specifies that the connection terminal is located on one side of the power board 140, and is close to the expansion module 200 and the guide rail 400. In this way, the guide rail 400 can support the expansion module 200 and the connection terminal, reducing vibration experienced by the connection terminal and thus improving the reliability of the connection between the connection terminal and the expansion module 200. Optionally, the expansion module 200 is located on the right side of the first housing 110, and correspondingly, the connection terminal is located on the right side of the power board 140. Optionally, the connection terminal is a T-junction terminal or the like.

[0105] The programmable logic controller 100 in the above embodiment integrates the CPU board and input / output board into the main control board 130. This reduces the number of circuit boards in the mounting cavity, thereby reducing the space occupied by the circuit boards, facilitating the miniaturization design of the programmable logic controller 100, increasing the integration level of the programmable logic controller 100, and reducing the overall cost. Simultaneously, the CPU device 132 and the programmable device are located away from the expansion module 200, preventing heat generated by the expansion module 200 during operation from being transferred to the CPU device 132 and the programmable device, ensuring the performance of the CPU device 132 and the programmable device, and ensuring the reliability of the main control board 130. Furthermore, the connection terminals are located on the power board 140 close to the expansion module 200 and the guide rail 400 to reduce vibration on the connection terminals and improve the reliability of the connection between the connection terminals and the expansion module 200.

[0106] In one embodiment, the CPU device 132 and programmable device on the main control board 130 can be replaced with one or more of a system-on-a-chip, application-specific integrated circuit, or digital signal processing chip, and achieve essentially the same function.

[0107] In one embodiment, the main control board 130 may also be equipped with only a CPU device 132 or a programmable device, and perform essentially the same functions.

[0108] In one embodiment, the second housing 120 has a mounting portion on one side for mounting the guide rail 400. That is, the mounting portion is provided on the back of the housing, so that the programmable logic controller 100 can be detachably mounted to the guide rail 400 via the mounting portion. Of course, in other embodiments of this application, the mounting portion may also be provided on one side of the first housing 110, which can slidably mount the guide rail 400.

[0109] like Figure 1 and Figure 2 As shown, in one embodiment, the expansion module 200 is detachably disposed on the right side of the second housing 120. When the programmable logic controller 100 can meet the usage requirements, the expansion module 200 is not disposed on the right side of the second housing 120. When the function of the programmable logic controller 100 cannot meet the usage requirements, at least one expansion module 200 is installed on the right side of the second housing 120.

[0110] Of course, in other embodiments of this application, the expansion module 200 may also be disposed at one end of the first housing 110, or at one end of the first housing 110 and the second housing 120. It is worth noting that the principle of the expansion module 200 being disposed at the first housing 110 and / or the second housing 120 is essentially the same as the principle of it being disposed at the second housing 120. Here, we will only take the example of the expansion module 200 being disposed at the end of the second housing 120 for explanation.

[0111] In one embodiment, one end of the second housing 120 has a first sliding portion 121, and one end of the expansion module 200 has a second sliding portion 210. The expansion module 200 is detachably mounted to the second housing 120 through the cooperation of the first sliding portion 121 and the second sliding portion 210. This facilitates the installation and removal of the expansion module 200, allowing for the installation of appropriate expansion modules 200 according to the application scenario of the programmable logic controller 100. Of course, in other embodiments of this application, the first sliding portion 121 may also be provided at one end of the first housing 110, or the first sliding portion 121 may be provided at one end of both the first housing 110 and the second housing 120.

[0112] Optionally, the bottom of the second housing 120 is provided with a first sliding portion 121, and the bottom of the expansion module 200 has a second sliding portion 210, with the second housing 120 and the expansion module 200 connected at the bottom. Alternatively, the top of the second housing 120 may have a first sliding portion 121, and the top of the expansion module 200 may have a second sliding portion 210, with the second housing 120 and the expansion module 200 connected at the top; or, both the top and bottom of the second housing 120 may have first sliding portions 121, and both the top and bottom of the expansion module 200 may have second sliding portions 210, with the second housing 120 and the expansion module 200 connected at both the top and bottom. The following description will only use the example of the second housing 120 having a first sliding portion 121 at the bottom and the expansion module 200 having a second sliding portion 210 at the bottom.

[0113] Optionally, one of the first sliding portion 121 and the second sliding portion 210 is a guide rail groove, and the other is a guide rail slider. For example, the first sliding portion 121 is a guide rail groove, and the second sliding portion 210 is a guide rail slider. Of course, in other embodiments of this application, the first sliding portion 121 may be a slider, and the second sliding portion 210 may be a guide rail groove; alternatively, the first sliding portion 121 and the second sliding portion 210 may also be other slidably connected structural forms.

[0114] Optionally, the bottom of the expansion module 200 is also provided with a first sliding part 121. That is, the bottom of the expansion module 200 has both a first sliding part 121 and a second sliding part 210. In this way, other expansion modules 200 can be installed on the previous expansion module 200 through the cooperation of the first sliding part 121 and the second sliding part 210, so as to add multiple expansion modules 200 sequentially on the programmable logic controller 100 to increase the functionality of the programmable logic controller.

[0115] See Figures 3 to 5In one embodiment, the main control board 130 and the power supply board 140 are substantially parallel to the surface of the first housing 110, with the power supply board 140 located on the side of the main control board 130 away from the first housing 110 and close to the guide rail 400. The main control board 130 and the power supply board 140 are arranged parallel to each other in the mounting cavity, and both the main control board 130 and the power supply board 140 are parallel to the surface of the first housing 110. In this way, the main control board 130 and the power supply board 140 can be arranged parallel to each other in the mounting cavity, reducing the space occupied by the circuit board and facilitating the layout of electrical components in the mounting cavity.

[0116] Furthermore, the power board 140 is located between the main control board 130 and the second housing 120. This facilitates the electrical connection of the input / output devices 131 of the main control board 130, simplifies the wiring layout, reduces structural complexity, and facilitates routing. With the power board 140 close to the guide rail 400, the connection terminals on the power board 140 are also close to the guide rail 400, facilitating connection between the connection terminals and the expansion module 200.

[0117] Of course, in other embodiments of this application, the main control board 130 may also be arranged perpendicularly to the power board 140. In this way, the power board 140 and the main control board 130 are staggered, and the components on the power board 140 will not be directly facing the power board 140, thus avoiding the heat from the power board 140 during operation from baking the main control board 130.

[0118] See Figures 3 to 7 In one embodiment, the main control board 130 has a first region 1301 and a second region 1302. The first region 1301 houses the CPU device 132 and the programmable device, while the remaining devices of the main control board 130 are disposed in the second region 1302. The heat generated by the devices in the first region 1301 is greater than the heat generated by the devices in the second region 1302. The first region 1301 is farther away from the expansion module 200, while the second region 1302 is closer to the expansion module 200.

[0119] like Figure 3 As shown, the left side of the main control board 130 is the first area 1301, and the right side is the second area 1302. If the programmable logic controller 100 adds an expansion module 200, then the first area 1301 will be further away from the expansion module 200, and the second area 1302 will be closer to the expansion module 200. Normally, the CPU device 132 and the programmable device generate a large amount of heat during operation, while the other components of the main control board 130 generate less heat compared to the CPU device 132 and the programmable device.

[0120] The first region 1301 houses the CPU device 132 and the programmable device, while the second region 1302 houses the remaining devices on the main control board 130. Specifically, the first region 1301 houses devices with high heat dissipation, while the second region 1302 houses devices with low heat dissipation. This arrangement ensures that the CPU device 132 and the programmable device on the main control board 130 are staggered from and distanced from the expansion module 200, avoiding the heat generated by the expansion module 200 and facilitating heat dissipation for the main control board 130, thus guaranteeing its performance.

[0121] After the programmable logic controller 100 of this application integrates the input / output board and the CPU board to form the main control board 130, the device layout on the main control board 130 is compact, which increases the heat dissipation difficulty of the main control board 130. To this end, the layout of each device on the main control board 130 is adjusted, and the devices with large heat dissipation are arranged in the first area 1301 far away from the expansion module 200, and the devices with small heat dissipation are arranged in the second area 1302 close to the expansion module 200.

[0122] In this way, the heat generated by the devices in the first region 1301 can be dissipated through the first housing 110 and the second housing 120. The large amount of heat generated when the expansion module 200 is working will not affect the devices in the first region 1301. As a result, the devices in the first region 1301 will not be baked by the heat of the expansion module 200, reducing the heat dissipation difficulty of the main control board 130, improving the heat dissipation effect of the main control board 130, and ensuring the performance of the main control board 130.

[0123] See Figures 3 to 5 In one embodiment, the main control board 130 has a clearance area, and the CPU device 132 and the programmable device are correspondingly disposed in the clearance area, with the CPU device 132 and the programmable device clearing the power board 140. The main control board 130 forms a clearance area in the portion where its projection does not overlap with that of the power board 140, that is, the left and right dimensions of the power board 140 are smaller than the left and right dimensions of the main control board 130. This clearance area is correspondingly disposed with respect to the CPU device 132 and the programmable device on the main control board 130.

[0124] In other words, the CPU device 132 and the programmable device are offset from the power board 140 in the left-right direction, and the CPU device 132 and the programmable device are not directly facing the power board 140. In this way, the heat generated by the power board 140 during operation will not be transferred to the CPU device 132 and the programmable device, and the heat generated by the CPU device 132 and the programmable device during operation will not be transferred to the power board 140, thus avoiding mutual heating between the CPU device 132 and the programmable device and the power board 140.

[0125] See Figures 4 to 7In one embodiment, the main control board 130 has a heat insulation channel 134, and the main control board 130 has a third region 1303 and a fourth region 1304, which are located on both sides of the heat insulation channel 134, respectively. The heat generated by the devices in the third region 1303 is greater than the heat generated by the devices in the fourth region 1304. The heat insulation channel 134 can divide the main control board 130 into the third region 1303 and the fourth region 1304. Specifically, in Figure 4 and Figure 7 In the middle, the upper part is the third region 1303, and the lower part is the fourth region 1304. The CPU device 132 and the programmable device are located in the third region 1303.

[0126] Understandably, the CPU device 132 and programmable device in the third region 1303 generate a large amount of heat during operation. If this heat is transferred to the fourth region 1304, it will affect the performance of the devices in the fourth region 1304. Therefore, this application uses a heat insulation channel 134 to separate the third region 1303 and the fourth region 1304. The heat insulation channel 134 can effectively separate some of the heat, reducing the heat in the third region 1303 from being transferred to the fourth region 1304 through the main control board 130, thus ensuring the performance of the devices in the fourth region 1304.

[0127] This application allows for the installation of heat sinks on the main control board 130, and also allows for the installation of heat insulation channels 134 on the main control board 130 to improve the heat dissipation efficiency of the heat-generating components. Optionally, heat sinks and / or heat insulation channels 134 can be installed only at heat-generating components with high heat output, or they can be installed at all heat-generating components. Optionally, heat-generating components with high heat output include, but are not limited to, relays, resistors, transformers, etc.

[0128] See Figures 1 to 7 In one embodiment, the first housing 110 and / or the second housing 120 are provided with heat dissipation holes 122, and the CPU device 132 and the programmable device are disposed on the side of the main control board 130 near the heat dissipation holes 122. That is, the mounting housing has through-hole heat dissipation holes 122, which connect the outer side of the mounting housing to the mounting cavity. When the CPU device 132 and the programmable device are near the mounting housing, they are directly facing the heat dissipation holes 122. In this way, the heat generated by the CPU device 132 and the programmable device during operation can be dissipated to the outer side of the mounting housing through the heat dissipation holes 122, achieving effective heat dissipation for the CPU device 132 and the programmable device, thereby reducing their temperature and ensuring their performance.

[0129] See Figures 1 to 7In this embodiment, the bottom of the second housing 120 has heat dissipation holes 122, and the CPU device 132 and the programmable device face the bottom of the second housing 120 to achieve heat dissipation for the CPU device 132 and the programmable device. Of course, in other embodiments of this application, heat dissipation holes 122 may also be provided at the bottom of the CPU device 132 and the programmable device, or heat dissipation holes 122 may be provided at the bottom of both the first housing 110 and the second housing 120.

[0130] See Figures 2 to 6 In one embodiment, the main control board 130 further includes a heat sink, on which the CPU device 132 and the programmable device are disposed. The heat sink serves to dissipate heat. After the heat sink is connected to the CPU device 132 and the programmable device, the CPU device 132 and the programmable device can transfer the heat generated during operation to the heat sink, thereby improving the heat conduction efficiency of the heat sink and thus improving the heat dissipation efficiency of the CPU device 132 and the programmable device. Exemplarily, the heat sink is a heat-dissipating copper foil. Of course, in other embodiments of this application, the heat sink may also be a heat sink fin, a heat-conducting plate, or other structures that can accelerate heat dissipation.

[0131] This application allows for the provision of heat sinks and thermal insulation channels 134 on the main control board 130 to improve the heat dissipation efficiency of the CPU device 132 and the programmable device. Optionally, heat sinks and / or thermal insulation channels 134 can be provided only at devices with high heat generation, or they can be provided at all devices. Optionally, heat-generating components with high heat generation include, but are not limited to, relays, resistors, and transformers.

[0132] See Figures 3 to 5 , Figure 8 and Figure 9 In one embodiment, the main control board 130 has a first connector 133 on one side, and the power board 140 has a second connector 141 on one side. The first connector 133 and the second connector 141 are correspondingly arranged and plugged into each other. The programmable logic controller 100 also includes a protective sleeve 150, which is fitted over the first connector 133 and the second connector 141. The protective sleeve 150 can form a sealed space with the main control board 130 and the power board 140 to accommodate the first connector 133 and the second connector 141. Figure 8 for Figure 4 The exploded view of the main control board 130 and power supply board 140 shown is as follows. Figure 9 for Figure 8 The diagram shows the protective sleeve 150 and the second connector 141.

[0133] The main control board 130 and the power supply board 140 are stacked in a front-to-back direction and electrically connected. This electrical connection allows the power supply board 140 to supply power to the main control board 130. A first connector 133 is provided on the surface of the main control board 130 facing the power supply board 140, and a second connector 141 is provided on the surface of the power supply board 140 facing the main control board 130. The first connector 133 and the second connector 141 are correspondingly arranged. When the main control board 130 and the power supply board 140 are connected, the first connector 133 and the second connector 141 are plugged into each other, thereby achieving electrical connection between the main control board 130 and the power supply board 140. Optionally, the first connector 133 is fixed to the main control board 130 by soldering, and the second connector 141 is fixed to the power supply board 140 by soldering.

[0134] Understandably, after the first connector 133 and the second connector 141 are connected, conductive substances and corrosive gases may enter between the first connector 133 and the second connector 141, causing short circuits and corrosion, affecting the use of the main control board 130 and the power board 140. Therefore, the programmable logic controller 100 of this application also includes a protective sleeve 150. The protective sleeve 150 is fitted over the outside of the first connector 133 and the second connector 141. Both ends of the protective sleeve 150 contact the surfaces of the main control board 130 and the power board 140, respectively, forming a sealed space with the surfaces of the main control board 130 and the power board 140. The first connector 133 and the second connector 141 are located within this sealed space, so that the protective sleeve 150 protects the first connector 133 and the second connector 141, thus isolating them from environmental pollution.

[0135] In actual use, the protective sleeve 150 is fitted over the outside of the second connector 141. After the first connector 133 and the second connector 141 are properly inserted, the protective sleeve 150 can still be fitted over the outside of the first connector 133. At this time, both ends of the protective sleeve 150 contact the main control board 130 and the power board 140 respectively, and are fixed between the main control board 130 and the power board 140, forming a sealed space to protect the first connector 133 and the second connector 141. In this way, conductive substances and corrosive gases will not enter between the first connector 133 and the second connector 141, thus achieving protection for the first connector 133 and the second connector 141.

[0136] In this embodiment, the first connector 133 is a male connector socket, and the second connector 141 is a female connector socket. The male and female connector sockets are connected via PIN pin insertion. The protective sleeve 150 protects the PIN pins and the surface mount pins 1351. Of course, in other embodiments of this application, the first connector 133 and the second connector 141 may include, but are not limited to, surface mount devices, through-hole devices, devices with pins 1351 that need protection, and may also be other devices that need protection.

[0137] See Figure 8 and Figure 9 In one embodiment, the protective sleeve 150 abuts against the main control board 130 and the power board 140. That is, after the first connector 133 and the second connector 141 are mated together, the two ends of the protective sleeve 150 are press-fitted with the main control board 130 and the power board 140 to seal the protective sleeve 150 around its perimeter, preventing conductive substances and corrosive gases from entering between the first connector 133 and the second connector 141, thus achieving reliable protection for the first connector 133 and the second connector 141.

[0138] See Figure 8 and Figure 9 In one embodiment, the protective sleeve 150 is made of an elastic insulating material. This allows the protective sleeve 150 to provide protection, preventing short circuits, and also to absorb tolerances arising from manufacturing and assembly, ensuring accurate mating between the protective sleeve 150 and the first connector 133 and the second connector 141. Exemplarily, the protective sleeve 150 is made of silicone rubber. Of course, in other embodiments of this application, the protective sleeve 150 may also be made of other elastic insulating materials.

[0139] See Figure 8 and Figure 9 In one embodiment, a preset gap exists between the protective sleeve 150 and the first connector 133 and the second connector 141. That is, the cross-sectional area of ​​the inner cavity of the protective sleeve 150 is larger than the cross-sectional area of ​​the first connector 133 and the second connector 141. Thus, after the protective sleeve 150 is fitted onto the first connector 133 and the second connector 141, a suitable gap is left between the inner wall of the protective sleeve 150 and the outer walls of the first connector 133 and the second connector 141, facilitating the assembly of the protective sleeve 150 with the first connector 133 and the second connector 141. This enables automated production assembly, improves production efficiency, and reduces manufacturing costs.

[0140] See Figure 8 and Figure 9In one embodiment, the protective sleeve 150 has a symmetrical structure. That is, the protective sleeve 150 adopts a symmetrical structural arrangement. In this way, the protective sleeve 150 does not need to distinguish the direction during assembly, which facilitates the assembly of the protective sleeve 150, realizes the automation of production assembly, improves production efficiency, and reduces manufacturing costs.

[0141] See Figure 3 , Figure 5 , Figure 10 and Figure 11 In one embodiment, the programmable logic controller 100 further includes a blocking member 180, which is disposed between the input / output device 131 and the main control board 130 to close the connection between the input / output device 131 and the main control board 130. Figure 10 for Figure 1 The schematic diagram of the programmable logic controller 100 shown is from another perspective. Figure 11 for Figure 10 A partial schematic diagram of the programmable logic controller 100 shown.

[0142] Understandably, the bottom of the input / output device 131 is usually open. After the input / output device 131 is soldered to the main control board 130, there is a large space between it and the main control board 130. Solid contaminants in the environment, such as conductive dust and conductive filaments, can easily enter the programmable logic controller 100 from the bottom of the input / output device 131, resulting in poor protection performance and affecting the performance of the programmable logic controller 100.

[0143] Therefore, this application employs a blocking member 180 to seal the bottom of the input / output device 131. The blocking member 180 is disposed at the bottom of the input / output device 131. After the input / output device 131 is soldered to the main control board 130, the blocking member 180 can abut against the main control board 130. At this time, there is no gap between the input / output device 131 and the main control board 130, thereby preventing solid contaminants such as conductive dust and conductive filaments from entering the programmable logic controller 100 from the bottom of the input / output device 131, thus enabling the blocking member 180 to perform its protective function.

[0144] Optionally, the blocking member 180 can be a baffle or other structure that can serve a blocking function. In one embodiment, the blocking member 180 and the input / output device 131 are integrated into one structure. This simplifies the assembly process and improves production efficiency. Of course, in other embodiments of this application, the blocking member 180 and the input / output device 131 can also be separately arranged.

[0145] See Figure 3 , Figure 5 , Figure 10 and Figure 11In one embodiment, the input / output device 131 includes a plurality of input terminals 1311 and a plurality of output terminals 1312. The plurality of input terminals 1311 and the plurality of output terminals 1312 are disposed on the front side of the first housing 110. The plurality of input terminals 1311 are located at the top of the main control board 130, and the plurality of output terminals 1312 are located at the bottom of the main control board 130. The plurality of input terminals 1311 are arranged at intervals in the left-right direction, and the plurality of output terminals 1312 are arranged at intervals in the left-right direction. Of course, the position and arrangement of the input terminals 1311 and the output terminals 1312 on the main control board 130 can be determined according to the actual situation, and this embodiment does not limit this.

[0146] Input terminals 1311 and output terminals 1312 serve as interfaces for the programmable logic controller 100 to connect to the outside world. Multiple input terminals 1311 and multiple output terminals 1312 are electrically connected to the main control board 130. These terminals also connect to field I / O devices or other external equipment. It is worth noting that the number of input terminals 1311 and multiple output terminals 1312 is not limited and can be reasonably set according to actual usage requirements. Furthermore, the number of input terminals 1311 and multiple output terminals 1312 can be equal or unequal.

[0147] See Figures 1 to 3 , Figure 10 , Figures 12 to 14 In one embodiment, the surface of the first housing 110 opposite to the second housing 120 has a recessed first mounting groove 111 and a second mounting groove 112. The first mounting groove 111 and the second mounting groove 112 are independent of each other and are disposed through the first housing 110 along its height direction. The first mounting groove 111 and the second mounting groove 112 are used to install the expansion card 300. Figure 12 for Figure 1 The schematic diagram of the programmable logic controller 100 shown is from another perspective. Figure 13 for Figure 3 A partial schematic diagram of the first housing 110 in the programmable logic controller 100 shown. Figure 14 for Figure 1 The diagram shows the expansion card 300.

[0148] When the core functions of the programmable logic controller 100 cannot meet customer needs, the core functions can be supplemented by an expansion card 300 to add specific functions to the programmable logic controller 100 and meet its performance requirements. The expansion card 300 has essentially the same function as the expansion module 200, and it can expand the functions or modules of the programmable logic controller 100 at a lower cost. Two mounting slots, a first mounting slot 111 and a second mounting slot 112, are provided on the front of the programmable logic controller 100, allowing for the installation of various types of expansion cards 300.

[0149] Understandably, by providing the first mounting slot 111 and the second mounting slot 112 on the surface of the first housing 110, the expansion requirements of the programmable logic controller 100 can be met. If the expansion requirements of the programmable logic controller 100 are large, an expansion module 200 or a combination of the expansion module 200 and the expansion card 300 can be used. The installation of the expansion module 200 has been mentioned above; here, only the installation of the expansion card 300 will be described.

[0150] The first mounting groove 111 and the second mounting groove 112 are recessed on the surface of the first housing 110. The first mounting groove 111 and the second mounting groove 112 penetrate the first housing 110 along the height direction, so that the first mounting groove 111 and the second mounting groove 112 form a three-sided open structure, that is, the first mounting groove 111 and the second mounting groove 112 are through-type structures.

[0151] Thus, the first mounting slot 111 and the second mounting slot 112 have a large accommodating space. After the expansion card 300 is installed into the first mounting slot 111 or the second mounting slot 112, the expansion card 300 can protrude from the surface of the first housing 110. At the same time, the expansion card 300 can also expose the first mounting slot 111 at the bottom and top.

[0152] In this way, a larger expansion card 300 can be accommodated through either the first mounting slot 111 or the second mounting slot 112, eliminating the need to reserve space for the expansion card 300 on the first housing 110, thus facilitating the installation of the expansion card 300. Furthermore, for expansion cards 300 of different sizes, as long as the expansion card 300 can be adapted to either the first mounting slot 111 or the second mounting slot 112, the through-hole mounting slots 111 and 112 can accommodate the expansion card 300, increasing the application types of the expansion card 300.

[0153] The expansion card 300 comes in various types, each of which can be installed in the first mounting slot 111 and / or the second mounting slot 112. Typically, certain types of expansion cards 300 are installed in the first mounting slot 111, while others are installed in the second mounting slot 112. Alternatively, some other types of expansion cards 300 can be installed in either the first or second mounting slot 112. In this case, the expansion card 300 is installed into the corresponding mounting slot according to its installation location to meet usage requirements.

[0154] When it is necessary to install the expansion card 300 into the programmable logic controller 100, the type of the expansion card 300 and the corresponding mounting slot are determined, and then the expansion card 300 is installed into the first mounting slot 111 or the second mounting slot 112 so that the programmable logic controller 100 can realize the corresponding expansion function.

[0155] See Figures 1 to 3 , Figure 10 , Figures 12 to 14 In one embodiment, the inner wall of the first mounting groove 111 has a first anti-misalignment member 113, and the inner wall of the second mounting groove 112 has a second anti-misalignment member 114. The first anti-misalignment member 113 and the second anti-misalignment member 114 correspond to and cooperate with the mounting portion 310 of the expansion card 300. The first anti-misalignment member 113 and the second anti-misalignment member 114 have different positions and / or structures.

[0156] To prevent the expansion card 300 from being installed backwards, this application provides a first anti-misalignment component 113 in the first mounting slot 111 and a second anti-misalignment component 114 in the second mounting slot 112. The first anti-misalignment component 113 and the second anti-misalignment component 114 together provide an anti-misalignment effect. The expansion card 300 has a mounting part 310, which can be configured to correspond to either the first anti-misalignment component 113 or the second anti-misalignment component 114.

[0157] When the mounting part 310 of the expansion card 300 corresponds to the first anti-fooling member 113, the mounting part 310 of the expansion card 300 does not match the second anti-fooling member 114. If the expansion card 300 is installed in the first mounting slot 111, the expansion card 300 can match the first anti-fooling member 113 through the mounting part 310, and the expansion card 300 is reliably fixed in the first mounting slot 111, indicating that the expansion card 300 is installed correctly.

[0158] If the expansion card 300 is installed in the second mounting slot 112, the mounting part 310 and the second anti-misalignment component 114 will not match, and the expansion card 300 will not be securely installed. This indicates that the expansion card 300 is installed incorrectly, and the operator needs to adjust the installation position of the expansion card 300. The same applies when the mounting part 310 of the expansion card 300 corresponds to the second anti-misalignment component 114, which will not be described in detail here.

[0159] In this embodiment, the first anti-misalignment member 113 is positioned differently in the first mounting slot 111 than the second anti-misalignment member 114 is positioned differently in the second mounting slot 112. The first anti-misalignment member 113 is disposed on one side wall of the first mounting slot 111, and the second anti-misalignment member 114 is disposed on the other side wall of the second mounting slot 112. Specifically, the first anti-misalignment member 113 is disposed on the left side wall of the first mounting slot 111, and the second anti-misalignment member 114 is disposed on the right side wall of the second mounting slot 112. The mounting portion 310 of the expansion card 300 is disposed corresponding to either the first anti-misalignment member 113 or the second anti-misalignment member 114 to match the first mounting slot 111 or the second mounting slot 112.

[0160] Optionally, the first anti-mistake component 113 can be disposed on the side wall of the first mounting groove 111, and the second anti-mistake component 114 can be disposed on the bottom wall of the second mounting groove 112, or the first anti-mistake component 113 can be disposed on the bottom wall of the first mounting groove 111, and the second anti-mistake component 114 can be disposed on the side wall of the second mounting groove 112.

[0161] Optionally, the first anti-mistake component 113 is disposed on the side wall of the first mounting groove 111, and the second anti-mistake component 114 is disposed on the side wall of the second mounting groove 112, with the first anti-mistake component 113 and the second anti-mistake component 114 being staggered. That is, the first anti-mistake component 113 and the second anti-mistake component 114 are not collinear in the left-right direction, so that the first anti-mistake component 113 and the second anti-mistake component 114 can also play an anti-mistake role.

[0162] Of course, in other embodiments of this application, the first anti-mistake component 113 and the second anti-mistake component 114 differ in structure, and the first anti-mistake component 113 and the second anti-mistake component 114 are respectively installed in conjunction with the corresponding mounting part 310. In this way, the first anti-mistake component 113 and the second anti-mistake component 114 can also play an anti-mistake role.

[0163] For example, the first anti-mistake element 113 and the second anti-mistake element 114 are anti-mistake ribs, and the mounting portion 310 is a groove that can mate with the anti-mistake ribs. These anti-mistake ribs serve both to prevent mistakes and to guide installation. The first anti-mistake element 113 is disposed on one side wall of the first mounting groove 111, and the second anti-mistake element 114 is disposed on the other side wall of the second mounting groove 112. One type of expansion card 300 is installed into the first mounting groove 111 through the guiding engagement of the mounting portion 310 and the first anti-mistake element 113, while another type of expansion card 300 is installed into the second mounting groove 112 through the guiding engagement of the mounting portion 310 and the second anti-mistake element 114.

[0164] When the expansion card 300 can be simultaneously fitted to both the first mounting slot 111 and the second mounting slot 112, the side wall of the expansion card 300 has a mounting portion 310 for fitting the first anti-foolproof component 113 and also has a mounting portion 310 for fitting the second anti-foolproof component 114. If the expansion card 300 is installed into the first mounting slot 111, the mounting portion 310 of the expansion card 300 corresponding to the second anti-foolproof component 114 needs to be sealed. At this time, the expansion card 300 cannot be installed into the second mounting slot 112, thus achieving the anti-foolproof function.

[0165] Of course, in other embodiments of this application, the first anti-mistake element 113 and the second anti-mistake element 114 may also be anti-mistake buckles, anti-mistake protrusions or anti-mistake grooves, etc., which can play an anti-mistake role.

[0166] See Figures 12 to 14 In one embodiment, the opposing sidewalls of the first mounting slot 111 and the second mounting slot 112 have fasteners 115, which are used to cooperate with the connector 320 of the expansion card 300. That is, both the sidewalls of the first mounting slot 111 and the second mounting slot 112 have fasteners 115, and the sidewall of the expansion card 300 has a connector 320, with the connector 320 corresponding to the fastener 115.

[0167] After the expansion card 300 is installed into the first mounting slot 111 or the second mounting slot 112, the card fastener 115 can engage with the card connector 320 to securely fix the expansion card 300 in the first mounting slot 111 or the second mounting slot 112, preventing the expansion card 300 from shifting in position in the first mounting slot 111 or the second mounting slot 112, thereby ensuring the performance of the expansion card 300.

[0168] Optionally, the fastener 115 and the latching member 320 can be a hook and slot mating structure. Of course, in other embodiments of this application, the fastener 115 and the latching member 320 can also be a buckle-buckle mating structure, a protrusion and groove mating structure, a spring and groove mating structure, etc.

[0169] See Figures 1 to 3 , Figure 10 , Figures 12 to 14 In one embodiment, the opposing sidewalls of the first mounting groove 111 and the second mounting groove 112 have a first guide 116. The first guide 116 is arranged along the depth direction of the first mounting groove 111 and the second mounting groove 112, and the first guide 116 is guided and engaged with the second guide 330 of the expansion card 300.

[0170] The first guide member 116 is arranged along the depth direction of the first mounting groove 111 or the second mounting groove 112, that is, extending in the front-to-back direction. The expansion card 300 has a second guide member 330, and the first guide member 116 and the second guide member 330 are correspondingly arranged. Before the expansion card 300 is installed into the first mounting groove 111 or the second mounting groove 112, the first guide member 116 and the second guide member 330 correspond to each other. Then, when the expansion card 300 is installed into the first mounting groove 111 or the second mounting groove 112, the first guide member 116 and the second guide member 330 cooperate.

[0171] When the expansion card 300 is pushed into the first mounting slot 111 or the second mounting slot 112, the expansion card 300 can move along the first guide 116 via the second guide 330. The first guide 116 can guide the second guide 330 so that the expansion card 300 can be accurately installed into the first mounting slot 111 or the second mounting slot 112, avoiding any deviation in the position of the expansion card 300 in the first mounting slot 111 or the second mounting slot 112.

[0172] Optionally, the first guide member 116 is a guide rib, and the second guide member 330 is a guide groove. Optionally, the end of the first guide member 116 has a tapered guide portion to facilitate the cooperation between the first guide member 116 and the second guide member 330. Of course, in other embodiments of this application, the first guide member 116 may also be a guide groove, and the second guide member 330 may be a guide rib.

[0173] See Figure 1 , Figure 3 and Figure 15 In one embodiment, the programmable logic controller 100 further includes a mounting member 170, which is disposed on the second housing 120 to mount the programmable logic controller 100 onto the guide rail 400, facilitating the installation of the programmable logic controller 100. The mounting member 170 may be a sliding snap-fit ​​structure or the like. Figure 15 for Figure 1 The rear view of the programmable logic controller 100 shown.

[0174] See Figure 1 and Figure 3 In one embodiment, the programmable logic controller 100 further includes a display module disposed in the mounting cavity and exposed to the first housing 110. The display module displays corresponding control information and is exposed through the first housing 110 for easy viewing by the operator. Optionally, the main control board 130 has multiple LEDs, and the main control board 130 can control the corresponding LEDs to emit light, which then shines into the display module, thus enabling the display module to display the corresponding control information.

[0175] See Figure 1 , Figure 3 , Figure 16 and Figure 17 In one embodiment, the display module includes a light guide 160, the first housing 110 has a through-hole 117, the light guide 160 is installed in the mounting cavity, and one end of the light guide 160 is installed in the through-hole 117. Figure 16 for Figure 1 The diagram shows the interaction between the light guide 160 and the first housing 110 in the programmable logic controller 100. Figure 17 for Figure 16 A schematic diagram of the light guide 160 shown.

[0176] The first housing 110 has multiple through-holes 117 arranged in rows and columns. After the light guide 160 is installed in the mounting cavity, one end of the light guide 160 is located in each of the through-holes 117. In this way, after the light emitted by the LED light enters the light guide 160, the light guide 160 can expose the light through each through-hole 117 to display the corresponding information.

[0177] In one embodiment, the display module further includes a display film disposed on the surface of the first housing 110 opposite to the second housing 120, and covering the light-transmitting holes 117. That is, the display film is attached to the front of the programmable logic controller 100 and covers each of the light-transmitting holes 117. Thus, the light transmitted by the light guide 160 passes through the display film to display corresponding information.

[0178] It is understood that the programmable logic controller 100 of this application can realize the display function by using the light guide 160 alone, or by using the light guide 160 in conjunction with the display film. The principle is essentially the same, and will not be described in detail below.

[0179] See Figure 16 and Figure 17 In one embodiment, the light guide 160 includes a mounting plate 161 and a plurality of light guide posts 162. The plurality of light guide posts 162 are disposed on the mounting plate 161, and the two ends of the light guide posts 162 protrude from the two surfaces of the mounting plate 161, respectively. The plurality of light guide posts 162 are disposed through the mounting plate 161, and a portion of the light guide posts 162 is located on the side of the mounting plate 161 facing the first housing 110, while the other portion of the light guide posts 162 is located on the side of the mounting plate 161 facing the second housing 120.

[0180] Multiple light guide pillars 162 are integrated and set by mounting plate 161, so that the light guide component 160 forms an integral structure, which facilitates the installation of the light guide component 160. Moreover, after the light guide component 160 is installed in the mounting cavity, one end of each light guide pillar 162 is installed in the corresponding light transmission hole 117. After the main control board 130 controls the corresponding LED light to emit light, the light can be projected into the corresponding light guide pillar 162, and then the light guide pillar 162 transmits light and is exposed through the corresponding light transmission hole 117.

[0181] Optionally, the mounting plate 161 and the multiple light guide posts 162 are integrated into one unit. That is, the mounting plate 161 and the multiple light guide posts 162 are integrally formed, which facilitates the forming and processing of the light guide component 160, reduces the number of parts, facilitates assembly, and lowers production costs. Of course, in other embodiments of this application, the mounting plate 161 and the multiple light guide posts 162 are separately arranged, and the light guide posts 162 are mounted to the mounting plate 161 by interference fit or snap-fit ​​fixing.

[0182] Optionally, the mounting plate 161 is rectangular. Of course, in other embodiments of this application, the mounting plate 161 may also be circular or other shapes, as long as the mounting of the light guide pillars 162 can be achieved. It is worth noting that the component form of the multiple light guide pillars 162 on the mounting plate 161 is not limited in principle, as long as the corresponding information can be displayed. Exemplarily, multiple light guide pillars 162 are arranged in rows and columns on the mounting plate 161.

[0183] See Figure 16 and Figure 17 In one embodiment, the longitudinal cross-sectional shape of the light guide post 162 is polygonal, circular, or elliptical. The light guide post 162 is cylindrical and extends along the line connecting the first housing 110 and the second housing 120. Figure 1 Based on the indicated direction, the light guide post 162 is positioned in the mounting cavity along the front-to-back direction. Correspondingly, the longitudinal section direction of the light guide post 162 refers to the surface perpendicular to the front-to-back direction.

[0184] Understandably, the longitudinal cross-sectional shape of the light guide post 162 is not limited in principle, as long as the light guide post 162 can match the light transmission hole 117. In this embodiment, the longitudinal cross-sectional shape of the light guide post 162 is rectangular. Of course, in other embodiments of this application, the longitudinal cross-sectional shape of the light guide post 162 can also be circular, elliptical, or pentagonal, etc.

[0185] Furthermore, the light guide post 162 has a certain size along the front-to-back direction. That is, the light guide post 162 is a cylindrical structure and is set perpendicular to the first housing 110. In this way, there is a certain distance between the end of the light guide post 162 located at the light-transmitting hole 117 (the front end of the light guide post 162) and the end away from the light-transmitting hole 117 (the rear end of the light guide post 162), so as to avoid light emission interference.

[0186] See Figures 16 to 18 In one embodiment, the light guide post 162 has an incident light surface 1621 and an exit light surface 1622 arranged opposite to each other. The incident light surface 1621 and the exit light surface 1622 are made of a high-gloss mirror material, and the side of the light guide 160 is made of a matte material. Figure 18 for Figure 17 The side view of the light guide 160 shown.

[0187] The front end of the light guide column 162 is the light-emitting surface 1622, and the rear end is the light-incident surface 1621. The light emitted by the LED lamp enters the light guide column 162 through the light-incident surface 1621 and exits through the light-emitting surface 1622. The light then passes through the light-transmitting hole 117 to achieve the display function. Moreover, the light-incident surface 1621 and the light-emitting surface 1622 are high-gloss mirror surfaces, which facilitates light transmission and reduces light reflection to ensure display effect.

[0188] Furthermore, the side surface of the light guide 160 is matte, that is, the surface of the light guide column 162 other than the light-incident surface 1621 and the light-exit surface 1622 is matte. In this way, light can be minimized from the side surface of the light guide column 162, improving the problem of light crosstalk and ensuring the display effect.

[0189] See Figure 16 In one embodiment, the surface of the first housing 110 facing the second housing 120 also has a protruding light-blocking member 118. The light-blocking member 118 surrounds the periphery of the light-transmitting hole 117 and forms an installation channel 1181. The installation channel 1181 communicates with the light-transmitting hole 117, and the light guide post 162 passes through the installation channel 1181 and is installed in the light-transmitting hole 117.

[0190] Each light-transmitting hole 117 corresponds to a set of light-blocking elements 118. Multiple sets of light-blocking elements 118 form multiple rows and columns of mounting channels 1181 on the surface of the first housing 110 facing the second housing 120. A light guide post 162 is installed in each mounting channel 1181. In this way, after the light emitted by the LED lamp enters the light guide post 162, the light in the light guide post 162 can be prevented from entering the adjacent light-transmitting hole 117 due to the light-blocking effect of the light-blocking elements 118, thereby improving the purpose of light crosstalk.

[0191] See Figures 16 to 18In one embodiment, the light guide 160 further includes a plurality of reinforcing ribs 163, which are disposed on the surface of the first housing 110 facing the second housing 120. A reinforcing rib 163 is disposed between two adjacent light guide pillars 162, and the height of the light guide pillar 162 is greater than the height of the reinforcing rib 163.

[0192] The reinforcing rib 163 extends along the front-back direction and connects two adjacent light guide pillars 162. The reinforcing rib 163 strengthens the two adjacent light guide pillars 162 to ensure the structural strength of the light guide component 160. Moreover, the dimension of the reinforcing rib 163 along the front-back direction is smaller than that of the light guide pillar 162 along the front-back direction. This can reduce the overall weight and lower the production cost while ensuring the strengthening effect.

[0193] It is worth noting that the structural form of the reinforcing rib 163 is not limited in principle, as long as the reinforcing rib 163 can connect two adjacent light guide posts 162. In this embodiment, the reinforcing rib 163 is a reinforcing plate. Of course, in other embodiments of this application, the reinforcing rib 163 can also be a reinforcing plate.

[0194] Optionally, the reinforcing rib 163 extends along the width and / or height direction of the first housing 110. Exemplarily, the reinforcing rib 163 may be disposed between two adjacent light guide pillars 162 in a vertical direction. Of course, in other embodiments of this application, the reinforcing rib 163 may be disposed between two adjacent light guide pillars 162 in a horizontal direction, or it may be disposed both vertically and horizontally between two adjacent light guide pillars 162.

[0195] See Figure 17 , Figures 19 to 21 In one embodiment, at least one surface of the mounting plate 161 has a recessed light-transmitting groove 1611, which is located between two adjacent light guide posts 162. Figure 19 for Figure 17 The schematic diagram of one embodiment of the light guide 160 shown is as follows. Figure 20 for Figure 17 A schematic diagram of another embodiment of the light guide 160 shown. Figure 21 for Figure 17 A partial cross-sectional view of the light guide 160 shown.

[0196] The mounting plate 161 has a recessed light-transmitting groove 1611 on the surface facing the first housing 110 and / or the surface facing the second housing 120, which improves the problem of light leakage. In this embodiment, the light-transmitting groove 1611 is provided on the surface of the mounting plate 161 facing the first housing 110, such as... Figure 21 As shown. Figure 19As shown, the light-transmitting groove 1611 is positioned vertically between two adjacent light guide pillars 162, as... Figure 20 As shown, the light-transmitting groove 1611 is disposed between two adjacent light guide pillars 162 in the left-right direction.

[0197] Optionally, the thickness of the mounting plate 161 at the light-transmitting groove 1611 ranges from 0.1mm to 0.3mm. That is, the light-transmitting groove 1611 does not penetrate the mounting plate 161, facilitating the processing and shaping of the light guide 160. Preferably, the thickness of the mounting plate 161 at the light-transmitting groove 1611 is approximately 0.2mm. Figure 21 As shown.

[0198] See Figure 16 and Figure 17 In one embodiment, the light guide 160 further includes a fixing member 164, which is disposed on the mounting plate 161. The surface of the first housing 110 facing the second housing 120 has a mating member 119, and the fixing member 164 and the mating member 119 are correspondingly disposed and engaged.

[0199] When the light guide 160 is installed on the first housing 110, the fixing member 164 is aligned with the mating member 119 and the fixing member 164 and the mating member 119 are engaged to fix the light guide 160 to the first housing 110, so as to ensure that each light guide post 162 can correspond to the light transmission hole 117 respectively, and to ensure that the light guide 160 is reliably fixed to the first housing 110.

[0200] For example, both the fixing member 164 and the mating member 119 are snap-fit ​​fasteners. Of course, in other embodiments of this application, the fixing member 164 and the mating member 119 may also be a snap-fit ​​and slot mating structure. Optionally, there are multiple fixing members 164, which are arranged around the periphery of the mounting plate 161, and there are also multiple mating members 119, which are arranged corresponding to the multiple fixing members 164, so as to ensure that the light guide post 162 is reliably fixed to the first housing 110.

[0201] See Figure 16 and Figure 17 In one embodiment, the light guide 160 further includes a first positioning member 165, which is disposed on the mounting plate 161. A second positioning member 1101 is disposed on the surface of the first housing 110 facing the second housing 120. The first positioning member 165 and the second positioning member 1101 are correspondingly disposed and positioned together.

[0202] When the light guide 160 is installed on the first housing 110, the first positioning member 165 and the second positioning member 1101 are aligned, and the light guide 160 is pushed toward the first housing 110 so that the first positioning member 165 and the second positioning member 1101 are positioned and engaged. After the first positioning member 165 and the second positioning member 1101 are positioned and engaged, the light guide 160 is pushed further so that the fixing member 164 and the mating member 119 are engaged, so as to ensure that each light guide post 162 can correspond to the light transmission hole 117 respectively, thereby improving the installation accuracy of the light guide 160.

[0203] For example, the first positioning element 165 is a positioning groove, and the second positioning element 1101 is a positioning post. Of course, in other embodiments of this application, the first positioning element 165 may also be a positioning post, and the second positioning element 1101 may be a positioning groove. Optionally, there may be multiple first positioning elements 165, which are arranged around the periphery of the mounting plate 161. There may also be multiple second positioning elements 1101, which are arranged corresponding to the multiple first positioning elements 165. This ensures the accuracy of the installation of the light guide post 162.

[0204] See Figures 1 to 21 The programmable logic controller 100 of this application integrates the CPU board and input / output board into the main control board 130, which reduces the number of circuit boards in the mounting cavity, thereby reducing the space occupied by the circuit boards and facilitating the miniaturization design of the programmable logic controller 100. At the same time, it can also increase the integration of the programmable logic controller 100 and reduce the overall cost. The overall layout architecture of the programmable logic controller 100 is simple, easy to install, and requires no screws for assembly.

[0205] Furthermore, the CPU device 132 and the programmable device on the main control board 130 are located in the first region 1301, which is far away from the expansion module 200. This avoids the CPU device 132 and the programmable device being affected by the heat generated by the expansion module 200, and thus they will not be baked by the heat of the expansion module 200. This reduces the heat dissipation difficulty of the main control board 130, improves the heat dissipation effect of the main control board 130, and ensures the performance of the main control board 130.

[0206] Furthermore, the CPU device 132 and the programmable device on the main control board 130 are positioned in a clearance area relative to the power board 140 to avoid contact with the power board 140. This prevents the heat generated by the power board 140 during operation from being transferred to the CPU device 132 and the programmable device, and vice versa, thus avoiding mutual heating between the CPU device 132 / programmable device and the power board 140. The CPU device 132 and the programmable device on the main control board 130 are also directly opposite the heat dissipation holes 122 of the mounting housing. The heat generated by the CPU device 132 / programmable device during operation can be dissipated to the outside of the mounting housing through the heat dissipation holes 122, achieving effective heat dissipation for the CPU device 132 / programmable device, reducing their temperature, and ensuring their performance.

[0207] The main control board 130 and the power board 140 are further connected via the first connector 133 and the second connector 141, and the first connector 133 and the second connector 141 are protected by a protective sleeve 150. This prevents conductive substances and corrosive gases from entering between the first connector 133 and the second connector 141, thus protecting them. A barrier 136 is also provided between the two pins 1351 of the capacitor 135. The barrier 136 isolates the two pins 1351, blocking their contact path, improving protection, preventing short circuits in the capacitor 135, and reducing production costs.

[0208] Furthermore, the surface of the first housing 110 is provided with a through-type first mounting groove 111 and a second mounting groove 112. The first mounting groove 111 and the second mounting groove 112 can accommodate expansion cards 300 of different sizes, thus having a wide range of applications. Together with the first anti-misalignment component 113 and the second anti-misalignment component 114, they prevent the expansion card 300 from being installed backwards, facilitating the assembly of the expansion card 300. In addition, an integrated light guide component 160 is used to realize the display function, reducing the number of parts and lowering production costs.

[0209] See Figures 3 to 5 , Figure 22 and Figure 23 In one embodiment, the main control board 130 further includes a capacitor 135 and a blocking member 136. The two pins 1351 of the capacitor 135 are electrically connected to the main control board 130, and the blocking member 136 is disposed on the main control board 130 and located between the two pins 1351. Figure 22 for Figure 4 The diagram shown is a 3D representation of a capacitor 135 mounted on the main control board 130. Figure 23 for Figure 22 The top view shown shows a capacitor 135 installed on the main control board 130.

[0210] Capacitor 135 is a component on the main control board 130. Capacitor 135 has two pins 1351, which are electrically connected to the main control board 130 to achieve the corresponding functions. Understandably, if a metal object short-circuits the two pins 1351 of capacitor 135, it will cause a short circuit, affecting the performance of the main control board 130. Protecting the pins 1351 with thermoplastic tubing would lead to production inconvenience and high costs. Therefore, this application provides a barrier 136 on the main control board 130, located between the two pins 1351. The barrier 136 isolates the two pins 1351, blocking their contact path, improving protection, preventing short circuits of capacitor 135, and reducing production costs.

[0211] See Figure 22 and Figure 23 In one embodiment, the barrier 136 is an electronic device or a partition. It is understood that the type of barrier 136 is not limited in principle, as long as it is located between the two pins 1351 and blocks the contact path between them. In this embodiment, the barrier 136 is a terminal, thereby blocking the contact path between the two pins 1351 and improving the protection effect. Of course, in other embodiments of this application, the barrier 136 can also be other types of devices or partitions, etc.

[0212] See Figures 3 to 7 This application also provides a main control board 130. The main control board 130 is disposed in the mounting cavity enclosed by the mounting housing of the programmable logic controller 100. One side of the mounting housing is used to mount the guide rail 400. The main control board 130 integrates at least an input / output device 131, a CPU device 132, and a programmable device. The CPU device 132 and the programmable device are located at the end of the main control board 130 away from the expansion module 200 of the programmable logic controller 100. The main control board 130 is electrically connected to a power board 140 located on one side of the main control board 130. A connection terminal for connecting the expansion module 200 is provided on one side of the power board 140, and the connection terminal is close to the expansion module 200 and close to the guide rail 400.

[0213] The main control board 130 and the power supply board 140 are the circuit boards of the programmable logic controller 100. The main control board 130 and the power supply board 140 are disposed in the mounting cavity enclosed by the first housing 110 and the second housing 120. The power supply board 140 is electrically connected to the main control board 130. The power supply board 140 is used to provide power to the entire programmable logic controller 100. The main control board 130 is the control motherboard of the programmable logic controller 100, and the overall control of the programmable logic controller 100 is realized through the main control board 130.

[0214] The power board 140 is electrically connected to the main control board 130, and supplies power to the main control board 130 through the power board 140. Moreover, the main control board 130 integrates at least input / output devices 131, CPU devices 132, and programmable devices. That is, the main control board 130 integrates devices from the input / output board (IO board) and the CPU board, giving the main control board 130 the functions of both an input / output board and a CPU board, reducing the number of control boards. This reduces the cost of the main control board 130 and also reduces the space occupied by the main control board 130, making the layout of the devices more compact.

[0215] Furthermore, the CPU device 132 and the programmable device are located at the end of the main control board 130 furthest from the expansion module 200. Understandably, the CPU device 132 and the programmable device generate a significant amount of heat during operation. Moreover, after the programmable logic controller 100 is connected to the expansion module 200, the expansion module 200 also generates a significant amount of heat during operation. This heat is transferred into the mounting cavity, where it combines with the heat from the CPU device 132 and the programmable device, affecting the power density of the main control board 130, impacting the performance of the heat-generating components, and consequently affecting the performance of the main control board 130.

[0216] Therefore, this application positions the CPU device 132 and the programmable device on the side of the main control board 130 away from the expansion module 200, so that the CPU device 132 and the programmable device are far apart from the expansion module 200. Figure 1 and Figure 2 As shown, the expansion module 200 is located on the right side of the main control board 130, and the CPU device 132 and the programmable device are located on the left side of the main control board 130. That is, the CPU device 132 and the programmable device and the expansion module 200 are respectively arranged on the left and right sides, so that there is a certain distance between the CPU device 132 and the programmable device and the expansion module 200.

[0217] In this way, the CPU device 132 and the programmable device are not placed close to the expansion module 200. Even if the heat generated by the expansion module 200 during operation is transferred to the mounting cavity, because the CPU device 132 and the programmable device are far apart from the expansion module 200, the heat from the expansion module 200 will not be transferred to the CPU device 132 and the programmable device. In other words, the heat from the expansion module 200 has a small impact on the heat of the CPU device 132 and the programmable device, thereby reducing the power consumption of the CPU device 132 and the programmable device and ensuring the power density of the main control board 130.

[0218] Meanwhile, because the CPU device 132 and the programmable device are far apart from the expansion module 200, the heat generated by the CPU device 132 and the programmable device during operation will not be transferred to the expansion module 200 outside the mounting cavity. In other words, the heat from the CPU device 132 and the programmable device has a small impact on the expansion module 200, so as to ensure the performance of the expansion module 200 and thus ensure the performance of the programmable logic controller 100 after its function is expanded.

[0219] Furthermore, the power board 140 is equipped with a connection terminal that can be connected to the expansion terminal to enable power supply and signal transmission. Understandably, when the programmable logic controller 100 is used in high-vibration conditions, the connection between the connection terminal and the expansion module 200 will be subject to vibration, affecting the reliability of the connection.

[0220] Therefore, this application specifies that the connection terminal is located on one side of the power board 140, and is close to the expansion module 200 and the guide rail 400. In this way, the guide rail 400 can support the expansion module 200 and the connection terminal, reducing vibration experienced by the connection terminal and thus improving the reliability of the connection between the connection terminal and the expansion module 200. Optionally, the expansion module 200 is located on the right side of the first housing 110, and correspondingly, the connection terminal is located on the right side of the power board 140. Optionally, the connection terminal is a T-junction terminal or the like.

[0221] The main control board 130 in the above embodiment integrates the CPU board and the input / output board, which reduces the number of circuit boards in the mounting cavity, thereby reducing the space occupied by the circuit boards. This facilitates the miniaturization design of the programmable logic controller 100, increases the integration of the programmable logic controller 100, and reduces the overall cost. Simultaneously, the CPU device 132 and the programmable device are located away from the expansion module 200, preventing heat generated by the expansion module 200 from being transferred to the CPU device 132 and the programmable device, ensuring their performance and the reliability of the main control board 130. Furthermore, the connection terminals on the power board 140 are close to the expansion module 200 and the guide rail 400 to reduce vibration on the connection terminals and improve the reliability of the connection between the connection terminals and the expansion module 200.

[0222] See Figures 3 to 5 In one embodiment, the main control board 130 has a clearance area, and the CPU device 132 and the programmable device are correspondingly disposed in the clearance area, with the CPU device 132 and the programmable device clearing the power board 140. The power board 140 forms a clearance area in the portion where its projection does not overlap with that of the main control board 130, that is, the left and right dimensions of the power board 140 are smaller than the left and right dimensions of the main control board 130, and this clearance area is correspondingly disposed with respect to the CPU device 132 and the programmable device on the main control board 130.

[0223] In other words, the CPU device 132 and the programmable device are offset from the power board 140 in the left-right direction, and the CPU device 132 and the programmable device are not directly facing the power board 140. In this way, the heat generated by the power board 140 during operation will not be transferred to the CPU device 132 and the programmable device, and the heat generated by the CPU device 132 and the programmable device during operation will not be transferred to the power board 140, thus avoiding mutual heating between the CPU device 132 and the programmable device and the power board 140.

[0224] See Figures 1 to 7 In one embodiment, the mounting housing is provided with heat dissipation holes 122, and the CPU device 132 and the programmable device are disposed on the side of the main control board 130 near the heat dissipation holes 122. The mounting housing has through-hole heat dissipation holes 122, which connect the outer side of the mounting housing to the mounting cavity. After the CPU device 132 and the programmable device are close to the mounting housing, they can face the heat dissipation holes 122. In this way, the heat generated by the CPU device 132 and the programmable device during operation can be dissipated to the outer side of the mounting housing through the heat dissipation holes 122, achieving effective heat dissipation of the CPU device 132 and the programmable device, thereby reducing the temperature of the CPU device 132 and the programmable device and ensuring their performance.

[0225] See Figures 1 to 7 In this embodiment, the bottom of the second housing 120 has heat dissipation holes 122, and the CPU device 132 and the programmable device face the bottom of the second housing 120 to achieve heat dissipation for the CPU device 132 and the programmable device. Of course, in other embodiments of this application, heat dissipation holes 122 may also be provided at the bottom of the CPU device 132 and the programmable device, or heat dissipation holes 122 may be provided at the bottom of both the first housing 110 and the second housing 120.

[0226] See Figures 2 to 6 In one embodiment, the main control board 130 further includes a heat sink, on which the CPU device 132 and the programmable device are disposed. The heat sink serves to dissipate heat. After the heat sink is connected to the CPU device 132 and the programmable device, the CPU device 132 and the programmable device can transfer the heat generated during operation to the heat sink, thereby improving the heat conduction efficiency of the heat sink and thus improving the heat dissipation efficiency of the CPU device 132 and the programmable device. Exemplarily, the heat sink is a heat-dissipating copper foil. Of course, in other embodiments of this application, the heat sink may also be a heat sink fin, a heat-conducting plate, or other structures that can accelerate heat dissipation.

[0227] See Figures 4 to 7In one embodiment, the main control board 130 has a heat insulation channel 134, and the main control board 130 has a third region 1303 and a fourth region 1304, which are located on both sides of the heat insulation channel 134, respectively. The heat generated by the devices in the third region 1303 is greater than the heat generated by the devices in the fourth region 1304. The heat insulation channel 134 can divide the main control board 130 into the third region 1303 and the fourth region 1304. Specifically, in Figure 4 and Figure 7 In the middle, the upper part is the third region 1303, and the lower part is the fourth region 1304. The CPU device 132 and the programmable device are located in the third region 1303.

[0228] Understandably, the CPU device 132 and programmable device in the third region 1303 generate a large amount of heat during operation. If this heat is transferred to the fourth region 1304, it will affect the performance of the devices in the fourth region 1304. Therefore, this application uses a heat insulation channel 134 to separate the third region 1303 and the fourth region 1304. The heat insulation channel 134 can effectively separate some of the heat, reducing the heat in the third region 1303 from being transferred to the fourth region 1304 through the main control board 130, thus ensuring the performance of the devices in the fourth region 1304.

[0229] See Figures 3 to 5 , Figure 8 and Figure 9 In one embodiment, the main control board 130 has a first connector 133 on one side, and the power board 140 has a second connector 141 on one side. The first connector 133 and the second connector 141 are correspondingly arranged and plugged into each other. The programmable logic controller 100 also includes a protective sleeve 150, which is fitted over the first connector 133 and the second connector 141. The protective sleeve 150 can form a sealed space with the main control board 130 and the power board 140 to accommodate the first connector 133 and the second connector 141.

[0230] The main control board 130 and the power supply board 140 are stacked in a front-to-back direction and electrically connected. This electrical connection allows the power supply board 140 to supply power to the main control board 130. A first connector 133 is provided on the surface of the main control board 130 facing the power supply board 140, and a second connector 141 is provided on the surface of the power supply board 140 facing the main control board 130. The first connector 133 and the second connector 141 are correspondingly arranged. When the main control board 130 and the power supply board 140 are connected, the first connector 133 and the second connector 141 are plugged into each other, thereby achieving electrical connection between the main control board 130 and the power supply board 140. Optionally, the first connector 133 is fixed to the main control board 130 by soldering, and the second connector 141 is fixed to the power supply board 140 by soldering.

[0231] Understandably, after the first connector 133 and the second connector 141 are connected, conductive substances and corrosive gases may enter between the first connector 133 and the second connector 141, causing short circuits and corrosion, affecting the use of the main control board 130 and the power board 140. Therefore, the programmable logic controller 100 of this application also includes a protective sleeve 150. The protective sleeve 150 is fitted over the outside of the first connector 133 and the second connector 141. Both ends of the protective sleeve 150 contact the surfaces of the main control board 130 and the power board 140, respectively, forming a sealed space with the surfaces of the main control board 130 and the power board 140. The first connector 133 and the second connector 141 are located within this sealed space, so that the protective sleeve 150 protects the first connector 133 and the second connector 141, thus isolating them from environmental pollution.

[0232] In actual use, the protective sleeve 150 is fitted over the outside of the second connector 141. After the first connector 133 and the second connector 141 are properly inserted, the protective sleeve 150 can still be fitted over the outside of the first connector 133. At this time, both ends of the protective sleeve 150 contact the main control board 130 and the power board 140 respectively, and are fixed between the main control board 130 and the power board 140, forming a sealed space to protect the first connector 133 and the second connector 141. In this way, conductive substances and corrosive gases will not enter between the first connector 133 and the second connector 141, thus achieving protection for the first connector 133 and the second connector 141.

[0233] In this embodiment, the first connector 133 is a male connector socket, and the second connector 141 is a female connector socket. The male and female connector sockets are connected via PIN pin insertion. The protective sleeve 150 protects the PIN pins and the surface mount pins 1351. Of course, in other embodiments of this application, the first connector 133 and the second connector 141 may include, but are not limited to, surface mount devices, through-hole devices, devices with pins 1351 that need protection, and may also be other devices that need protection.

[0234] See Figure 8 and Figure 9 In one embodiment, the protective sleeve 150 abuts against the main control board 130 and the power board 140. That is, after the first connector 133 and the second connector 141 are mated together, the two ends of the protective sleeve 150 are press-fitted with the main control board 130 and the power board 140 to seal the protective sleeve 150 around its perimeter, preventing conductive substances and corrosive gases from entering between the first connector 133 and the second connector 141, thus achieving reliable protection for the first connector 133 and the second connector 141.

[0235] See Figure 8 and Figure 9In one embodiment, the protective sleeve 150 is made of an elastic insulating material. This allows the protective sleeve 150 to provide protection, preventing short circuits, and also to absorb tolerances arising from manufacturing and assembly, ensuring accurate mating between the protective sleeve 150 and the first connector 133 and the second connector 141. Exemplarily, the protective sleeve 150 is made of silicone rubber. Of course, in other embodiments of this application, the protective sleeve 150 may also be made of other elastic insulating materials.

[0236] See Figure 8 and Figure 9 In one embodiment, a preset gap exists between the protective sleeve 150 and the first connector 133 and the second connector 141. That is, the cross-sectional area of ​​the inner cavity of the protective sleeve 150 is larger than the cross-sectional area of ​​the first connector 133 and the second connector 141. Thus, after the protective sleeve 150 is fitted onto the first connector 133 and the second connector 141, a suitable gap is left between the inner wall of the protective sleeve 150 and the outer walls of the first connector 133 and the second connector 141, facilitating the assembly of the protective sleeve 150 with the first connector 133 and the second connector 141. This enables automated production assembly, improves production efficiency, and reduces manufacturing costs.

[0237] See Figure 8 and Figure 9 In one embodiment, the protective sleeve 150 has a symmetrical structure. That is, the protective sleeve 150 adopts a symmetrical structural arrangement. In this way, the protective sleeve 150 does not need to distinguish the direction during assembly, which facilitates the assembly of the protective sleeve 150, realizes the automation of production assembly, improves production efficiency, and reduces manufacturing costs.

[0238] This application also provides an automation device, including a cabinet and a programmable logic controller 100 as described in any of the above embodiments. The programmable logic controller 100 is disposed in the cabinet. This automation device can be applied to industrial fields such as electronics manufacturing, lasers, machine tools, and medical devices. The automation device of this application, by employing the programmable logic controller of the above embodiments, can achieve automatic control while possessing the characteristics of high integration, low cost, and small product size.

[0239] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0240] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A programmable logic controller, characterized in that, include: First shell; The second housing covers the first housing and together with the first housing forms an installation cavity, and one side of the first housing or the second housing is used to install the guide rail; The main control board is disposed in the mounting cavity. The main control board integrates at least input / output devices, a CPU device, and a programmable device. The CPU device and the programmable device are located at the end of the main control board away from the expansion module of the programmable logic controller. A power board is disposed in the mounting cavity and electrically connected to the main control board. One end of the power board is provided with a connection terminal for connecting the expansion module. The connection terminal is close to the expansion module and close to the guide rail.

2. The programmable logic controller according to claim 1, characterized in that, The main control board and the power board are parallel to the surface of the first housing, and the power board is located on the side of the main control board away from the first housing, and the power board is close to the guide rail.

3. The programmable logic controller according to claim 1, characterized in that, The main control board is arranged perpendicularly to the power board, and the power board is close to the guide rail.

4. The programmable logic controller according to claim 1, characterized in that, The main control board has a first area and a second area, wherein the first area is configured with the CPU device and the programmable device; The heat generated by the device in the first region is greater than the heat generated by the device in the second region. The first region is farther away from the expansion module, and the second region is closer to the expansion module.

5. The programmable logic controller according to claim 1, characterized in that, The main control board has a clearance area, and the CPU device and the programmable device are arranged corresponding to the clearance area, with the CPU device and the programmable device clearing the power board.

6. The programmable logic controller according to claim 1, characterized in that, The main control board has a heat insulation channel, and the main control board has a third region and a fourth region. The third region and the fourth region are located on both sides of the heat insulation channel, and the heat generated by the device in the third region is greater than the heat generated by the device in the fourth region.

7. The programmable logic controller according to any one of claims 1 to 6, characterized in that, The first housing and / or the second housing are provided with heat dissipation holes, and the CPU device and the programmable device are disposed on the side of the main control board near the heat dissipation holes.

8. The programmable logic controller according to any one of claims 1 to 6, characterized in that, The main control board also has a heat sink, and the CPU device and the programmable device are disposed on the heat sink.

9. The programmable logic controller according to any one of claims 1 to 6, characterized in that, The main control board has a first connector on one side, and the power board has a second connector on one side. The first connector and the second connector are correspondingly arranged and plugged into each other. The programmable logic controller further includes a protective sleeve, which is fitted over the first connector and the second connector. The protective sleeve, the main control board, and the power board form a sealed space to accommodate the first connector and the second connector.

10. The programmable logic controller according to claim 9, characterized in that, The protective sleeve is made of elastic insulating material; And / or, there is a preset gap between the protective sleeve and the first connector and the second connector; And / or, the protective sleeve has a symmetrical structure; And / or, the protective sleeve abuts against the main control board and the power board.

11. The programmable logic controller according to any one of claims 1 to 6, characterized in that, The surface of the first housing opposite to the second housing has a recessed first mounting groove and a second mounting groove. The first mounting groove and the second mounting groove are independent of each other and are disposed through the first housing along the height direction. The first mounting slot and the second mounting slot are used to install expansion cards.

12. The programmable logic controller according to claim 11, characterized in that, The inner wall of the first mounting slot has a first anti-fooling component, and the inner wall of the second mounting slot has a second anti-fooling component. The first anti-fooling component and the second anti-fooling component are correspondingly engaged with the mounting part of the expansion card. The first anti-mistake component and the second anti-mistake component have different installation positions and / or structures.

13. The programmable logic controller according to claim 11, characterized in that, The sidewalls of the first mounting slot and the second mounting slot that are opposite to each other have fasteners, which cooperate with the card connector of the expansion card; And / or, the opposite sidewalls of the first mounting slot and the second mounting slot have a first guide member, the first guide member being arranged along the depth direction of the first mounting slot and the second mounting slot, and the first guide member being guided and engaged with the second guide member of the expansion card.

14. The programmable logic controller according to any one of claims 1 to 6, characterized in that, The programmable logic controller further includes a display module, which includes a light guide. The first housing has a through-hole for light transmission. The light guide is installed in the mounting cavity, and one end of the light guide is installed in the through-hole. The light guide includes a mounting plate and a plurality of light guide pillars. The plurality of light guide pillars are disposed on the mounting plate, and the two ends of the light guide pillars protrude from the two surfaces of the mounting plate, respectively.

15. The programmable logic controller according to claim 14, characterized in that, The display module has at least one of the following: Firstly, the light guide further includes a plurality of reinforcing ribs, the reinforcing ribs being disposed on the surface of the mounting plate facing the second housing, and a reinforcing rib being disposed between two adjacent light guide pillars, the height of the light guide pillar being greater than the height of the reinforcing rib; Secondly, at least one surface of the mounting plate has a recessed light-transmitting groove, the light-transmitting groove being located between two adjacent light guide pillars; Thirdly, the light guide further includes a fixing member, which is disposed on the mounting plate. The surface of the first housing facing the second housing has a mating member, and the fixing member and the mating member are correspondingly disposed and engaged in a locking manner. Fourthly, the light guide further includes a first positioning member, which is disposed on the mounting plate. A second positioning member is disposed on the surface of the first housing facing the second housing. The first positioning member and the second positioning member are correspondingly disposed and positioned in cooperation. Fifthly, the light guide column has an incident light surface and an exit light surface arranged opposite to each other at both ends, the incident light surface and the exit light surface are made of a high-gloss mirror material, and the side of the light guide is made of a matte material; The sixth item is that the surface of the first housing facing the second housing also has a protruding light-blocking member, the light-blocking member surrounds the periphery of the light-transmitting hole and forms an installation channel, the installation channel communicates with the light-transmitting hole, and the light guide post passes through the installation channel and is installed in the light-transmitting hole; The seventh item is that the longitudinal cross-sectional shape of the light guide column is polygonal, circular or elliptical, the light guide column is columnar and extends along the direction of the line connecting the first housing and the second housing; The eighth item is that the display module further includes a display film, which is disposed on the surface of the first housing opposite to the second housing and covers the light-transmitting hole.

16. The programmable logic controller according to any one of claims 1 to 6, characterized in that, The programmable logic controller further includes a blocking element disposed between the input / output device and the main control board to seal the connection between the input / output device and the main control board.

17. An automated device, characterized in that, Includes a cabinet and a programmable logic controller as described in any one of claims 1 to 16; The programmable logic controller is located in the cabinet.

18. A main control board, characterized in that, The main control board is used for a programmable logic controller (PLC). The PLC includes a first housing and a second housing, which enclose a mounting cavity. A guide rail is mounted on one side of either the first or second housing. The main control board is disposed in the mounting cavity. The main control board integrates at least an input / output device, a CPU device, and a programmable device. The CPU device and the programmable device are located at the end of the main control board away from the expansion module of the PLC. The main control board is electrically connected to a power board located on one side of the main control board. One end of the power board is provided with a connection terminal for connecting the expansion module, which is close to the expansion module and the guide rail.

19. The main control board according to claim 18, characterized in that, The main control board has a clearance area, and the CPU device and the programmable device are arranged corresponding to the clearance area, with the CPU device and the programmable device clearing the power board.

20. The main control board according to claim 18, characterized in that, The first housing and / or the second housing are provided with heat dissipation holes, and the CPU device and the programmable device are disposed on the side of the main control board near the heat dissipation holes.

21. The main control board according to any one of claims 18 to 20, characterized in that, The main control board also has a heat sink, and the CPU device and the programmable device are disposed on the heat sink.

22. The main control board according to any one of claims 18 to 20, characterized in that, The main control board has a heat insulation channel, and the main control board has a third region and a fourth region. The third region and the fourth region are located on both sides of the heat insulation channel, and the heat generated by the device in the third region is greater than the heat generated by the device in the fourth region.

23. The main control board according to any one of claims 18 to 20, characterized in that, The main control board has a first connector, and the power board has a second connector on the side facing the main control board. The first connector and the second connector are correspondingly arranged and plugged into each other. The main control board also includes a protective sleeve, which is fitted over the first connector and the second connector. The protective sleeve can form a sealed space with the main control board and the power board to accommodate the first connector and the second connector.

24. The main control board according to claim 23, characterized in that, The protective sleeve is made of elastic insulating material; And / or, there is a preset gap between the protective sleeve and the first connector and the second connector; And / or, the protective sleeve has a symmetrical structure; And / or, the protective sleeve abuts against the main control board and the power board.

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