Embedded multifunctional acquisition control circuit

Abstract

The embedded multifunctional acquisition control circuit comprises an MCU control circuit, a relay circuit, a 485 circuit and a dry contact circuit, the relay circuit, the 485 circuit and the dry contact circuit are respectively connected with the MCU control circuit, and the 485 circuit comprises an RS-485 / 422 transceiver, a resettable fuse and a TVS tube implementation circuit. The TVS tube implementation circuit is electrically connected with the RS-485 / 422 transceiver through the resettable fuse, and the RS-485 / 422 transceiver is connected with the MCU control circuit. Compared with the prior art, the RS-485 / 422 transceiver has high electrical isolation, the dry contact circuit with 16 dry contacts is adopted, configuration can be carried out according to actual requirements of customers, unnecessary redundant interfaces are reduced, and the requirements of industrial application are met.

Description

Technical Field

[0001] The utility model relates to the technical field of acquisition control circuits, and more specifically, to an embedded multifunctional acquisition control circuit. Background Art

[0002] The development of intelligence has promoted the diversification of industry solutions, especially industrial intelligence is a hot topic. The current intelligence of industry, warehousing, etc. requires the collection of environmental parameters in the use scenarios, status data of large electromechanical equipment, production lines and other equipment, and even requires emergency control of certain equipment. The traditional model generally adopts industrial-grade PLC solutions, but with the development of the Internet of Things, some special intelligent devices have also emerged in order to save costs. These devices are developed using embedded systems or single-chip microcomputer solutions, which also solve similar problems.

[0003] At present, the application functions of industrial PLC solutions are too powerful. For some small-scale industrial intelligence, the functions are too redundant and the cost is too high. In order to pursue cost-effectiveness, many small sensor acquisition and control devices have also appeared, but there are two problems:

[0004] 1. Using small civilian equipment in industrial environments. Because the civilian-grade equipment scene is too single and the complexity of the industrial-grade application site environment is not considered, equipment failures occur frequently and stability cannot be guaranteed;

[0005] 2. The interface is too single and the application scenarios of multiple interfaces are not considered, which will cause a certain waste of equipment costs for applications with high configuration requirements.

[0006] Therefore, it is necessary to propose an embedded multifunctional acquisition control circuit to solve the above problems. Utility Model Content

[0007] The utility model provides an embedded multifunctional acquisition control circuit to solve the problems of single interface and poor stability of the existing acquisition control circuit.

[0008] According to one aspect of the utility model, there is provided an embedded multifunctional acquisition control circuit, comprising an MCU control circuit, a relay circuit, a 485 circuit and a dry contact circuit, wherein the relay circuit, the 485 circuit and the dry contact circuit are respectively connected to the MCU control circuit, and the 485 circuit comprises an RS-485 / 422 transceiver, a resettable fuse and a TVS tube implementation circuit, wherein the TVS tube implementation circuit is electrically connected to the RS-485 / 422 transceiver through the resettable fuse, and the RS-485 / 422 transceiver is connected to the MCU control circuit.

[0009] Preferably, based on the above solution, the dry contact circuit includes 16 dry contacts.

[0010] Preferably, based on the above solution, the dry contact circuit is connected to the device via an optocoupler isolation power supply.

[0011] Preferably, based on the above solution, the model of the RS-485 / 422 transceiver is CA-IS3092W.

[0012] Preferably, based on the above scheme, it further includes a power supply circuit, and the power supply circuit is electrically connected to the MCU control circuit through a reference voltage circuit.

[0013] The utility model discloses an embedded multifunctional acquisition control circuit, which adopts an isolated RS-485 / 422 transceiver CA-IS3092W, a resettable fuse, and a TVS tube to realize the EMC protection of the circuit. The high electrical isolation of the RS-485 / 422 transceiver is utilized, and the bus side pins have ±8kV HBM ESD protection and ±12kV IEC 61000-4-2 contact discharge ESD protection to realize its isolation protection. A dry contact circuit with 16 dry contacts is adopted, which can be configured according to the actual needs of customers, reducing unnecessary redundant interfaces to meet the needs of industrial applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0015] Figure 1 It is a logic block diagram of the embedded multifunctional acquisition control circuit of the utility model;

[0016] Figure 2 It is a wiring diagram of the relay circuit of the utility model;

[0017] Figure 3 It is the wiring diagram of the 485 circuit of the utility model;

[0018] Figure 4 It is the wiring diagram of the dry contact circuit of the utility model;

[0019] Figure 5 It is the wiring diagram of the power supply circuit of the utility model;

[0020] Figure 6 It is a wiring diagram of the reference voltage circuit of the utility model;

[0021] Figure 7 It is the wiring diagram of the MCU control circuit of the utility model; DETAILED DESCRIPTION

[0022] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0024] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0025] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0026] In the embodiments shown in the drawings, the directions (such as up, down, left, right, front and back) used to explain the structure and movement of the various components of the present invention are not absolute but relative. These descriptions are appropriate when the components are in the positions shown in the drawings. If the description of the positions of the components changes, the directions also change accordingly.

[0027] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0029] See also Figure 1 , and combined with Figure 2 and Figure 3As shown, an embedded multifunctional acquisition control circuit of the utility model includes an MCU control circuit, a relay circuit, a 485 circuit and a dry contact circuit, wherein the relay circuit, the 485 circuit and the dry contact circuit are respectively connected to the MCU control circuit, and the 485 circuit includes an RS-485 / 422 transceiver, a resettable fuse and a TVS tube implementation circuit, wherein the TVS tube implementation circuit is electrically connected to the RS-485 / 422 transceiver through the resettable fuse, and the RS-485 / 422 transceiver is connected to the MCU control circuit.

[0030] The model of RS-485 / 422 transceiver is CA-IS3092W, and its circuit diagram is as follows: Figure 3 As shown, the S-485 / 422 transceiver model CA-IS3092W provides good electrical isolation with ±8kV HBM ESD protection and ±12kV IEC 61000-4-2 contact discharge ESD protection on its bus-side pins to meet the needs of industrial applications.

[0031] When an external transient large voltage / current signal (such as lightning strike) is induced on the A and B lines, it first passes through the fuse to prevent the subsequent circuit from burning out when the RS-485 bus and the power line are short-circuited; then the TVS tube of the circuit is used as secondary protection to clamp the bus level to below 6.5V to achieve surge protection requirements.

[0032] The dry contact circuit of the utility model includes 16 dry contacts. The dry contact circuit is connected to the device through an optical coupling isolation power supply, isolating the external circuit from the device, so that the circuit has stronger anti-interference and system stability. The specific dry contact circuit is as follows Figure 4 shown.

[0033] Furthermore, the utility model also includes a power supply circuit, which is electrically connected to the MCU control circuit through a reference voltage circuit, and an anti-reverse diode and a TVS tube are connected to the interface of the power supply circuit. The anti-reverse diode protects the subsequent circuit from being burned out when the positive and negative poles are connected in reverse, and the TVS tube clamps the voltage at 30V, protecting the subsequent circuit from being burned out when the power supply voltage is too high. For the specific circuit diagram of the power supply circuit, please refer to Figure 5 For the reference voltage circuit, see Figure 6 As shown, the MCU control circuit of the utility model adopts HC32L136K8TA-LQ64, and its specific circuit wiring diagram is as follows Figure 7 shown.

[0034] The utility model discloses an embedded multifunctional acquisition control circuit, which adopts an isolated RS-485 / 422 transceiver CA-IS3092W, a resettable fuse, and a TVS tube to realize the EMC protection of the circuit. The high electrical isolation of the RS-485 / 422 transceiver is utilized, and the bus side pins have ±8kV HBM ESD protection and ±12kV IEC 61000-4-2 contact discharge ESD protection to realize its isolation protection. A dry contact circuit with 16 dry contacts is adopted, which can be configured according to the actual needs of customers, reducing unnecessary redundant interfaces to meet the needs of industrial applications.

[0035] Finally, the method of this application is only a preferred implementation scheme and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An embedded multifunctional acquisition control circuit, characterized in that: It includes an MCU control circuit, a relay circuit, a 485 circuit and a dry contact circuit, wherein the relay circuit, the 485 circuit and the dry contact circuit are respectively connected to the MCU control circuit, and the 485 circuit includes an RS-485 / 422 transceiver, a resettable fuse and a TVS tube implementation circuit, the TVS tube implementation circuit is electrically connected to the RS-485 / 422 transceiver through the resettable fuse, and the RS-485 / 422 transceiver is connected to the MCU control circuit.

2. An embedded multifunctional acquisition control circuit as claimed in claim 1, characterized in that: The dry contact circuit includes 16 dry contacts.

3. An embedded multifunctional acquisition control circuit as claimed in claim 1, characterized in that: The dry contact circuit is connected to the device via an optocoupler isolation power supply.

4. The embedded multifunctional acquisition control circuit according to claim 1, characterized in that: It also includes a power supply circuit, which is electrically connected to the MCU control circuit through a reference voltage circuit.

5. The embedded multifunctional acquisition control circuit according to claim 1, characterized in that: The model of the RS-485 / 422 transceiver is CA-IS3092W.

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