Intelligent analog signal input module

Abstract

The utility model discloses an intelligent analog signal input module which comprises ten channel type selection circuits, ten loop current limiting protection circuits, ten optoelectronic isolation sampling circuits, a 24V isolation interface power supply, a 24V floating diagnosis circuit, a channel indication circuit, an MCU processing unit, a state indication circuit, an ROM storage circuit, a USB communication circuit and a 485 communication circuit. The beneficial effects of the utility model are that the analog signal input module is convenient to install, channel indication is simple and visual, channels and channels are electrically isolated from the interior of the module, channel type configuration is flexible, a 24V isolation transmitter interface power supply and a signal line grounding diagnosis module are built in, maintenance personnel can be prompted to process timely, and the maintenance efficiency is improved. The signal line anti-misoperation device is provided with a built-in alarm module, supports a logic configuration function, supports dual configuration of modules, is highly intelligent, can be flexibly configured to adapt to different market requirements and technical applications, has good economic benefits and social benefits, and is suitable for popularization and application.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of analog signal input module, specifically, an intelligent analog signal input module belongs to analog signal input module application technical field. Especially, an intelligent analog signal input module applied in industrial control system. BACKGROUND

[0002] With the continuous development of society, automation system has been rapidly popularized, and modern industrial production process is rapidly developing towards large-scale, comprehensive, complex and fine. Analog signal input module is widely used, and plays a crucial role in the field of industrial control. Most of the existing analog signal input modules have complex interfaces, large size and single use, and are not intelligent. With the continuous upgrading of market demand and technology application, some products are difficult to meet the needs of the market, and their application is limited. Therefore, an intelligent analog signal input module is proposed to solve the above problems. SUMMARY

[0003] The utility model discloses a kind of intelligent analog signal input module to solve the above situation, simple structure, small size, wiring is simple, logic configuration function can be realized, electrical isolation between channel and channel and module internal, multiple channel types can be supported by jumper, 24V isolation transducer interface power supply is built-in, signal line grounding diagnostic module is built-in, can realize highly intelligent analog signal acquisition processing and application, and reach multi-channel type intelligent effect.

[0004] The utility model discloses a kind of intelligent analog signal input module, including with ten-channel channel type selection circuit, one end of the ten-channel channel type selection circuit is connected to external analog signal, the other end is connected ten-channel loop current-limiting protection circuit;The ten-channel loop current-limiting protection circuit is connected to ten-channel photoelectric isolation sampling circuit;The ten-channel photoelectric isolation sampling circuit is connected 24V isolation interface power supply, 24V floating diagnostic circuit, channel indicating circuit and analog signal input module located in MCU processing unit interior, and the state display module of the MCU processing unit interior is connected state indicating circuit;The external storage module of the MCU processing unit interior is connected ROM storage circuit;The USB drive module of the MCU processing unit interior is connected USB communication circuit;The communication module of the MCU processing unit interior is connected 485 communication circuit.

[0005] Preferably, the MCU processing unit further comprises: an analog signal filter, an analog signal alarm module and a data processing module connected to the analog signal input module.

[0006] Preferably, the ten-channel type selection module supports channel types 0-5V or 1-5V or 4-20mA or internally powered 4-20mA, and the channel type of the module is changed by setting the jumper.

[0007] Preferably, the ten-channel photoelectric isolation sampling circuit is electrically isolated between channels and between channels and the internal module, and the channels share a set of built-in 24V isolated transmitter interface power supplies.

[0008] Preferably, the intelligent analog signal input module has a built-in signal line ground diagnosis module to prevent signal misoperation caused by multiple-point grounding of the signal line.

[0009] Preferably, the intelligent analog signal input module scans the input signal at a period of 2ms and sets a reasonable filtering period according to the need to reasonably optimize the data quality.

[0010] The utility model discloses a beneficial effect is: convenient installation, passageway indication simple and direct, and the electrical isolation between channels and between channels and the internal module, and the channel type configuration is flexible, and the built-in 24V isolated transmitter interface power supply, and the built-in signal line ground diagnosis module can prompt maintenance personnel to handle in time, prevents the signal misoperation caused by multiple-point grounding of the signal line, and the built-in alarm module supports the logic configuration function, and supports the module duplex configuration, and the high intelligentization can be flexibly configured and adapts to different market demand and technical application, and has good economic benefit and social benefit, and is suitable for promotion and use. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 As shown in the principle block diagram of the intelligent analog signal input module of the utility model,

[0012] Figure 2 For Figure 1 As shown in the electrical principle diagram of one of the ten-channel type selection circuit and the ten-channel loop current limiting protection circuit of the intelligent analog signal input module,

[0013] Figure 3 For Figure 1 As shown in the electrical principle diagram of one of the ten-channel photoelectric isolation sampling circuit of the intelligent analog signal input module,

[0014] Figure 4 For Figure 1 As shown in the electrical principle diagram of the 24V isolated interface power supply and the 24V floating diagnosis circuit of the intelligent analog signal input module. DETAILED DESCRIPTION

[0015] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0016] Please refer to Figures 1-4 As shown in the figure, the intelligent analog signal input module 100 comprises: a ten-channel type selection circuit 1, a ten-channel loop current limiting protection circuit 2, a ten-channel photoelectric isolation sampling circuit 3, a 24V isolation interface power supply 4, a 24V floating diagnosis circuit 5, a channel indicator 6, an MCU processing unit 7, a state indication circuit 8, a ROM storage circuit 9, a USB communication circuit 10, and a 485 communication circuit 11.

[0017] The MCU processing unit 7 is a core processing component, which comprises an analog signal input module, an analog signal filter, an analog signal alarm module, a data processing module, a state display module, an external storage module, a USB communication module, and a communication module. The analog signal input module is used for data acquisition, processing, and range conversion of analog signals. The analog signal filter is used for filtering processing of the collected analog signals. The analog signal alarm module can generate an alarm record with accurate time and parameters, which is used for understanding the working state of the module and performing fault analysis. The data processing module is used for data acquisition and processing, logic configuration, data conversion, parameter processing, and the like. The state display module is used for displaying and processing various running states of the module through indicator lights. The external storage module is used for saving hardware information, parameter information, power failure saving information, and the like of the module. The USB communication module is used for USB communication with an upper computer and can supply power to the module through the USB. The communication module is used for multi-module networking communication.

[0018] Please refer to Figure 2 The ten-channel type selection circuit 1 and the ten-channel loop current limiting protection circuit 2 are composed of a 6-pin jumper J8, a 2-pin jumper J3, a MOS tube Q1, three resistors R5, R6, and R17, a capacitor C7, a 3-pin jumper J10, a parallel regulator U14, and four resistors R44, R50, R51, and R52. The J8 is used for channel type selection, the J3 is used for selecting current input, the R5 and R6 are used for converting current input into voltage, the C7 is used for decoupling, the R17 is used for current limiting, the Q1 is used for voltage regulation when internal power supply, the J10 is used for voltage selection, the U14 is used for voltage stabilization, and the R44, R50, R51, and R52 are used for voltage division.

[0019] Please refer to Figure 3The ten-channel photoelectric isolation sampling circuit 3, one of which is composed of two 2-channel photoelectric couplers U10 and U15, a capacitor C20, three resistors R46-R48 and an amplifier U12. U10 and U15 are used to isolate the external analog signal from the internal module and enhance the anti-interference ability. C20 is used to maintain the signal voltage during isolation. R46 and R47 are used for voltage division. R48 is used for current limiting. U12 is used to amplify the analog signal and improve the input impedance of the next stage.

[0020] Please refer to Figure 4 The 24V isolation interface power supply and 24V floating diagnostic circuit are composed of seventeen resistors R3-R10, R16, R18, R20, R21, R23, R24, R26 and R27, five capacitors C6, C7, C9, C10 and C11, one MOS tube Q1, two DC-DC power supplies U3 and U6. R3-R6 and R7-R10 are connected in series respectively to divide the voltage and limit the current. R16 is used for pull-down to stabilize the static level. R18 and R19 are used for voltage division. R20, R23 and R26 are connected in series, and R21, R24 and R27 are connected in series, all of which are used for voltage division and isolation. C6, C7, C9, C10 and C11 are used for filtering and decoupling. Q1 is used to limit the impact current after power-on. U3 and U6 are used for isolated power conversion.

[0021] The connection relationship of the above-mentioned components is that one end of the ten-channel type selection circuit 1 is connected to the external analog signal, and the other end is connected to the ten-channel loop current limiting protection circuit 2. The ten-channel loop current limiting protection circuit 2 is connected to the ten-channel photoelectric isolation sampling circuit 3. The ten-channel photoelectric isolation sampling circuit 3 is connected to the 24V isolation interface power supply 4, the 24V floating diagnostic circuit 5, the channel indication 6 and the analog signal input module inside the MCU processing unit 7. The state display module inside the MCU processing unit 7 is connected to the state indication circuit 8. The external storage module inside the MCU processing unit 7 is connected to the ROM storage circuit 9. The USB drive module inside the MCU processing unit 7 is connected to the USB communication circuit 10. The communication module inside the MCU processing unit 7 is connected to the 485 communication circuit 11.

[0022] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0023] Furthermore, it should be understood that although the present specification describes exemplary embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that a person skilled in the art can understand.

Claims

1. An intelligent analog signal input module, characterized in that: The device has a ten-channel type selection circuit (1), one end of which is connected to an external analog signal and the other end is connected to a ten-loop current limiting protection circuit (2); the ten-loop current limiting protection circuit (2) is connected to a ten-channel opto-isolated sampling circuit (3); the ten-channel opto-isolated sampling circuit (3) is connected to a 24V isolation interface power supply (4), a 24V floating diagnostic circuit (5), a channel indicator circuit (6), and an analog signal input module located inside the MCU processing unit (7), and the status display module inside the MCU processing unit (7) is connected to a status indicator circuit (8); the external storage module inside the MCU processing unit (7) is connected to a ROM storage circuit (9); the USB driver module inside the MCU processing unit (7) is connected to a USB communication circuit (10); and the communication module inside the MCU processing unit (7) is connected to a 485 communication circuit (11).

2. The intelligent analog signal input module according to claim 1, characterized in that: The MCU processing unit (7) further includes: an analog signal filter, an analog signal alarm module, and a data processing module connected to the analog signal input module.

3. The intelligent analog signal input module according to claim 1, characterized in that: The ten-channel type selection circuit (1) supports channel types of 0-5V, 1-5V, 4-20mA, or internally powered 4-20mA. The channel type of the module can be changed by setting the jumper of the module.

4. The intelligent analog signal input module according to claim 1, characterized in that: The ten opto-isolated sampling circuits (3) are electrically isolated between channels and between channels and the module. The channels share a set of built-in 24V isolation transmitter interface power supplies.

5. The intelligent analog signal input module according to claim 1, characterized in that: The intelligent analog signal input module has a built-in signal line grounding diagnostic module to prevent signal malfunctions caused by multiple grounding points on the signal line.

6. The intelligent analog signal input module according to claim 1, characterized in that: The intelligent analog signal input module scans the input signal at a period of 2ms and sets a reasonable filtering period as needed to optimize the data quality.

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