A high-protection general-purpose electrical logic controller

Abstract

This utility model relates to the field of electrical logic controller technology, and in particular to a high-protection general-purpose electrical logic controller. The high-protection general-purpose electrical logic controller includes: a dual-core STM32F4 series main control board, a plug-in connector, and a high-protection metal housing. The main chip of the dual-core STM32F4 series main control board is responsible for interfacing with the application programming platform and executing control tasks, while the slave chips are responsible for implementing the functional points. The main control board includes 75 input channels, 47 output channels, and 5 communication channels. The input channels include analog signal input circuits, digital input circuits for switch quantities, and analog-to-digital conversion circuits. The high-protection general-purpose electrical logic controller provided by this utility model avoids task queuing and response delays, meets the high real-time requirements of multi-channel synchronous acquisition and high-frequency control, can adapt to various scenarios without additional expansion modules, reduces costs and failure risks, reduces circuit damage and signal interference, extends equipment life, and reduces maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of electrical logic controller technology, and in particular to a high-protection general-purpose electrical logic controller. Background Technology

[0002] In fields such as industrial automation, intelligent manufacturing, and smart buildings, GE logic controllers serve as core control units, undertaking key tasks such as signal acquisition, logic operations, device driving, and data communication. Their performance directly determines the stability, reliability, and adaptability of the entire control system.

[0003] Currently, general-purpose logic controllers on the market generally suffer from several technical shortcomings: First, their core architecture mostly uses a single-core processor. Limited by the computing power of a single core, they struggle to efficiently handle both "control task execution" and "functional point implementation" simultaneously, often resulting in task queuing and response delays. This is particularly problematic in scenarios involving multi-channel signal synchronous acquisition and high-frequency equipment control, where control accuracy drops significantly, failing to meet the demands of high real-time industrial applications. Second, their input / output channel configurations are fixed. Most controllers have a fixed number and type of channels for analog signal input, digital input, and analog signal output. When facing different equipment interfacing requirements in various scenarios, it is necessary to replace them with dedicated controllers or add additional expansion modules. The expansion module not only increases hardware costs but also adds complexity to system wiring and increases the risk of failure. Third, the communication interface is limited in function; traditional controllers often only support a single type of communication protocol (such as only supporting RS-232 or only supporting CAN), making it difficult to flexibly adapt to the communication needs of different external devices such as sensors, actuators, and host computers in industrial settings. This results in poor device compatibility and high system integration difficulty. Fourth, protection performance is insufficient; most controller housings are made of plastic or simple metal structures with low protection levels. In complex environments common in industrial settings, such as dust, humidity, vibration, and electromagnetic interference, internal circuit damage and signal interference are likely to occur, shortening equipment lifespan and increasing maintenance costs.

[0004] Therefore, it is necessary to provide a new high-protection general-purpose electrical logic controller to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a high-protection general-purpose electrical logic controller.

[0006] The high-protection general electrical logic controller provided by this utility model includes: a dual-core STM32F4 series main control board, a plug-in connector, and a high-protection metal housing. The dual-core STM32F4 series main control board is located inside the high-protection metal housing, and the plug-in connector is located on one side of the high-protection metal housing.

[0007] Preferably, the main chip of the dual-core STM32F4 series main control board is responsible for interfacing with the application programming platform and executing control tasks, while the slave chip is responsible for implementing the functional points.

[0008] Preferably, the dual-core STM32F4 series main control board includes 75 input channels, 47 output channels and 5 communication channels. The input channels include analog signal input circuits, digital input circuits, and analog-to-digital conversion circuits; the output channels include configurable digital output circuits and analog signal output circuits; and the communication channels include CAN communication circuits and RS-232 communication circuits.

[0009] Preferably, the analog signal input circuit includes an analog current input circuit and an analog voltage input circuit. The voltage input range of the analog voltage input circuit includes 0-10V and 0-32V, and the current input range of the analog current input circuit is 0-20mA.

[0010] Preferably, the analog voltage input circuit includes a resistor, a capacitor, a transient suppression diode, an N-channel field-effect transistor, and a switching diode, and the voltage input range of 0-10V and 0-32V is switched by controlling the switching on and off of the N-channel field-effect transistor.

[0011] Preferably, the CAN communication circuit includes a high-speed CAN transceiver chip TAJ1050T. The TXD pin of the TAJ1050T chip is used to receive and transmit CAN data signals, the RXD pin is used to output received CAN data signals, the CANH pin is used to output CAN high-level signals, the CANL pin is used to output CAN low-level signals, the VCC pin is used to connect to a 5VD power supply to obtain the operating voltage, and the GND pin is grounded.

[0012] Preferably, the mating connector includes a 96P connector socket and a 58P connector socket.

[0013] Compared with related technologies, the high-protection general-purpose electrical logic controller provided by this utility model has the following advantages:

[0014] Adopting a dual-core STM32F4 architecture, the main chip focuses on control task execution, while the slave chip is responsible for functional point implementation. The dual-core collaboration overcomes the bottleneck of single-core computing, avoids task queuing and response latency, and meets the high real-time requirements of multi-channel synchronous acquisition and high-frequency control. It is equipped with 75 inputs, 47 outputs and 5 communication channels, covering analog signal, digital signal processing and CAN and 232 multi-protocol communication. It can adapt to various scenarios without additional expansion modules, reducing costs and failure risks. With a high-protection metal shell, it can resist complex industrial environments such as dust, humidity and vibration, reduce circuit damage and signal interference, extend equipment life and reduce maintenance costs. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of the high-protection general-purpose electrical logic controller provided by this utility model;

[0016] Figure 2 This is a circuit diagram of the analog voltage input circuit of this utility model;

[0017] Figure 3 This is a CAN communication circuit diagram of this utility model.

[0018] The diagram is labeled as follows: 100, Dual-core STM32F4 series main control board; 101, High-protection metal casing; 102, Plug-in connector. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0020] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0021] Please see Figure 1 As shown in the embodiment of this utility model, a high-protection general-purpose electrical logic controller includes a high-protection metal housing 101. The high-protection metal housing 101 houses a dual-core STM32F4 series main control board 100. The main control board chip includes a master chip and a slave chip. The master chip focuses on the core control logic. On the one hand, it establishes data interaction with the application programming platform, receives control parameters and program instructions configured by the user, and on the other hand, it parses instructions and executes core control tasks, such as logic operations and timing scheduling. The slave chip focuses on the implementation of functional points, undertakes the point-driven tasks assigned by the master chip, and is responsible for the execution of specific functions such as analog signal acquisition and switch signal output. The division of labor between master and slave chips avoids resource contention and improves the overall control efficiency and real-time performance.

[0022] In one embodiment, see Figure 1 As shown, a plug-in connector 102 is provided on one side of the high-protection metal housing 101. The plug-in connector 102 includes a 96P connector socket and a 58P connector socket. Through these two types of plug-in connectors 102, it is possible to easily connect with various external devices, sensors, actuators, etc., which greatly facilitates the docking and expansion of the controller with external systems and improves the flexibility and convenience of system integration.

[0023] In one embodiment, see Figure 2As shown, D17 (SMF36CA): a bidirectional TVS diode used for transient overvoltage protection. When a voltage spike occurs in the input voltage, it clamps the voltage within a safe range.

[0024] D15 (BAS416): Schottky diode, anode connected to +10V power supply, used for forward overvoltage clamping. It conducts when the node voltage exceeds approximately 10.3V (10V + forward voltage drop of 0.3V), clamping voltage.

[0025] D16 (BAS416): Schottky diode, anode connected to +3.3V power supply, used for forward overvoltage clamping. It conducts when the node voltage exceeds approximately 3.6V (3.3V + forward voltage drop of 0.3V), clamping voltage.

[0026] Q6 (BSS123): N-channel enhancement-mode MOSFET, used as an electronic switch, controlled by the ADC_EN signal to turn on or off.

[0027] R56, R57, R58, R59, R60, R61, R62: These resistors form a voltage divider circuit to divide the input voltage, so that the voltage finally input to the ADCMCU is adapted to its input range.

[0028] When ADC_EN is high, the gate-source voltage condition required for Q6 to conduct is met, and Q6 is in the on state. At this time, the equivalent resistance between the drain (D) and source (S) of Q6 is very small, approximately a short circuit. From the perspective of the input voltage divider path, since Q6 is on, the branch containing R61 is effectively connected and participates in the voltage divider. The input voltage enters from the ADCSOCKET, is divided by R57, and then undergoes a second voltage divider by R58, R61, and R62 before finally being input to the ADCMCU. Under this voltage divider configuration, the entire voltage divider circuit can adjust the input voltage from 0 to 32V to a suitable input range for the ADCMCU.

[0029] When ADC_EN is low, the gate-source voltage condition required for Q6 to conduct cannot be met, and Q6 is in the off state. At this time, the equivalent resistance between the drain (D) and source (S) of Q6 is very large, approximately an open circuit. From the perspective of the input voltage divider path, since Q6 is off, the branch containing R61 is essentially open and does not participate in the voltage division. The input voltage enters from the ADCSOCKET, is divided by R57, and then undergoes a second voltage division by R58 and R62 before finally being input to the ADCMCU. Under this voltage divider configuration, the entire voltage divider circuit can adjust the 0-10V input voltage to a suitable input range for the ADCMCU.

[0030] In one embodiment, see Figure 3As shown, the transceiver chip U48 uses the TJA1050T model. Its TXD pin (pin 1) is used to receive and transmit data signals, the RXD pin (pin 4) is used to output received data signals, the CANH pin (pin 7) is used to output CAN high-level signals, the CANL pin (pin 6) is used to output CAN low-level signals, the VCC pin (pin 3) is used to connect to a 5VD power supply to obtain the operating voltage, and the GND pin (pin 2) is used for grounding.

[0031] The first resistor network includes resistors R346 and R347, both of which have a resistance of 4.7KΩ. One end of both resistors is connected to the 5VD power supply, and the other end is connected to the CAN_TXD_A signal terminal and the CAN_RXD_A signal terminal respectively, for pull-up processing of the CAN_TXD_A and CAN_RXD_A signals.

[0032] The second resistor R453 has a resistance of 1KΩ. One end of it is connected to the CAN_RXD_A signal terminal, and the other end is connected to the RXD pin (pin 4) of the transceiver chip U48.

[0033] The third resistor R348 has a resistance of 10KΩ. One end of it is connected to the TXD pin (pin 1) of the transceiver chip U48, and the other end is grounded.

[0034] Common mode inductor L10 has two windings, which are connected to the CANH pin (pin 7) and CANL pin (pin 6) of transceiver chip U48 respectively, and are used to suppress common mode interference.

[0035] The terminating resistor R350 has a resistance of 120Ω and is connected between the CANH and CANL signals after processing by the common-mode inductor L10. It is used to match the impedance of the CAN bus and reduce signal reflection.

[0036] The protection diode group includes diodes D66, D67, and D68. Diode D66 is a P4SMA27CA model and is connected between the CANH_A and CANL_A signal terminals to clamp the differential voltage between CANH and CANL. Diodes D67 and D68 are both P4SMA27CA models. One end of diode D67 is connected to the CANH_A signal terminal, and the other end is grounded. One end of diode D68 is connected to the CANL_A signal terminal, and the other end is grounded to clamp the CANH and CANL signals to ground, respectively.

[0037] The working principle of the high-protection general-purpose electrical logic controller provided by this utility model is as follows:

[0038] First, the main chip in the dual-core STM32F4 series main control board 100 interfaces with the application programming platform to receive the control parameters and program instructions configured by the user. At the same time, it parses the instructions and executes the core control tasks. Then, the main chip assigns the point-driven tasks to the slave chip. The slave chip focuses on the implementation of the functional points. After taking on these tasks, it is responsible for the specific functions of analog signal acquisition and digital signal output.

[0039] In the analog signal input stage, taking the analog voltage input circuit as an example, when a voltage input of 0-32V range needs to be processed, the ADC_EN signal becomes high, causing the N-channel enhancement-mode MOSFET (Q6) to meet the gate-source voltage condition and turn on. At this time, the branch where R61 is located is turned on to participate in voltage division. The input voltage enters from ADC_SOCKET, is divided by resistor R57, and then divided again by resistors R58, R61, and R62 before finally being input to ADC_MCU.

[0040] When processing voltage inputs in the 0-10V range, the ADC_EN signal goes low, Q6 is cut off because the gate-source voltage condition is not met, the branch containing R61 is disconnected and does not participate in voltage division, the input voltage enters from ADC_SOCKET, is divided by R57, and then divided again by R58 and R62, and finally input to ADC_MCU. During this process, bidirectional TVS diode D17 (SMF36CA) is used for transient overvoltage protection, clamping the voltage within a safe range when a spike pulse occurs in the input voltage.

[0041] Schottky diode D15 (BAS416) has its anode connected to a +10V power supply for forward overvoltage clamping. It conducts the clamping voltage when the node voltage exceeds approximately 10.3V. Schottky diode D16 (BAS416) has its anode connected to a +3.3V power supply for forward overvoltage clamping. It conducts the clamping voltage when the node voltage exceeds approximately 3.6V.

[0042] In the CAN communication stage, the TXD pin of the transceiver chip U48 (TAJ1050T) receives and transmits data signals, and the RXD pin outputs received data signals. Resistors R346 and R347 pull up the CAN_TXD_A and CAN_RXD_A signals. Resistor R453 connects the CAN_RXD_A signal terminal to the RXD pin of the transceiver chip U48. One end of resistor R348 is connected to the TXD pin of the transceiver chip U48, and the other end is grounded. Common-mode inductor L10 suppresses common-mode interference. Termination resistor R350 matches the impedance of the CAN bus to reduce signal reflection. Diode D66 in the protection diode group clamps the differential voltage between CANH and CANL. Diodes D67 and D68 clamp the CANH and CANL signals to ground, respectively.

[0043] When interfacing with external devices, the plug-in connector 102 includes a 96P connector socket and a 58P connector socket. These two types of connectors facilitate connection with various external devices, sensors, actuators, etc., to realize signal input and output and data communication. During operation, the entire controller is protected by a high-protection metal shell 101, ensuring the stable operation of the internal dual-core STM32F4 series main control board 100 in complex industrial environments.

[0044] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-guarded general-purpose electrical logic controller, characterized by, include: The dual-core STM32F4 series main control board (100), the plug-in connector (102), and the high-protection metal housing (101) are located inside the high-protection metal housing (101) and the plug-in connector (102) is located on one side of the high-protection metal housing (101).

2. The high-protection general-purpose electrical logic controller according to claim 1, characterized in that, The main chip of the dual-core STM32F4 series main control board (100) is responsible for interfacing with the application programming platform and executing control tasks, while the slave chip is responsible for implementing the functional points.

3. The high-protection general-purpose electrical logic controller according to claim 1, characterized in that, The dual-core STM32F4 series main control board (100) includes 75 input channels, 47 output channels and 5 communication channels. The input channels include analog signal input circuits, digital input circuits, and analog-to-digital conversion circuits. The output channels include configurable digital output circuits and analog signal output circuits. The communication channels include CAN communication circuits and RS-232 communication circuits.

4. The high-protection general-purpose electrical logic controller according to claim 3, characterized in that, The analog signal input circuit includes an analog current input circuit and an analog voltage input circuit. The voltage input range of the analog voltage input circuit includes 0~10V and 0~32V, and the current input range of the analog current input circuit is 0~20mA.

5. The high-protection general-purpose electrical logic controller according to claim 4, characterized in that, The analog voltage input circuit includes resistors, capacitors, transient suppression diodes, N-channel field-effect transistors, and switching diodes. By controlling the switching on and off of the N-channel field-effect transistors, the voltage input range can be switched between 0~10V and 0~32V.

6. The high-protection general-purpose electrical logic controller according to claim 2, characterized in that, The CAN communication circuit includes a high-speed CAN transceiver chip TAJ1050T. The TXD pin of the TAJ1050T chip is used to receive and transmit CAN data signals, the RXD pin is used to output received CAN data signals, the CANH pin is used to output CAN high-level signals, the CANL pin is used to output CAN low-level signals, the VCC pin is used to connect to a 5VD power supply to obtain the operating voltage, and the GND pin is grounded.

7. The high-protection general-purpose electrical logic controller according to claim 1, characterized in that, The mating connector (102) includes a 96P connector socket and a 58P connector socket.

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