CN221631961U - Intelligent switching circuit and industrial control equipment - Google Patents
Intelligent switching circuit and industrial control equipment Download PDFInfo
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- CN221631961U CN221631961U CN202420012299.1U CN202420012299U CN221631961U CN 221631961 U CN221631961 U CN 221631961U CN 202420012299 U CN202420012299 U CN 202420012299U CN 221631961 U CN221631961 U CN 221631961U
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Abstract
The utility model provides an intelligent switching circuit and industrial control equipment, which comprise a control module and a level conversion module; the input end of the control module is used for being connected with the output end of the main control module of the industrial control equipment; the controlled end of the level conversion module is connected with the output end of the control module, the input end of the level conversion module is connected with the main control module, and the output end of the level conversion module is connected with the access equipment; the control module switches the working mode of the level conversion module under the control of the main control module so as to meet the requirement of the access equipment on an interface. The utility model can meet the requirements of access devices with different interface types.
Description
Technical Field
The utility model relates to the technical field of serial communication, in particular to an intelligent switching circuit and industrial control equipment.
Background
With the development of serial communication interface technology, three serial communication interfaces, namely RS-232, RS-422 and RS-485, are mainly used. The RS-232 adopts an unbalanced transmission mode, namely single-ended communication, only allows one-to-one communication, and has short communication distance and low speed; the RS-422 adopts a balanced transmission mode, namely a differential transmission mode, is a one-way and balanced transmission standard of single-machine transmission and multi-machine reception, and overcomes the defects of short RS-232 communication distance and low speed; the RS-485 adds multipoint and bidirectional communication capability based on the RS-422, namely, a plurality of transmitters are allowed to be connected to the same bus, but the RS-485 can only work in half duplex mode, and the transmitting and receiving can not be carried out simultaneously.
Different serial communication interfaces used by different serial communication interface devices in different use scenes are different, the electrical characteristics of RS-232, RS-422 and RS-485 are different, different serial communication interfaces on industrial control equipment are usually required to be designed with different interface outputs, and when the serial communication interfaces on the industrial control equipment are not corresponding to the protocol standard of the client serial data interface device, the industrial control equipment cannot be used, and the use requirements of different scenes cannot be met.
Disclosure of utility model
The utility model provides an intelligent switching circuit and industrial control equipment, and aims to solve the problem that the existing industrial control equipment cannot meet the use requirements of different interface equipment.
In a first aspect, the present utility model provides an intelligent switching circuit, which includes a control module and a level shift module; the input end of the control module is used for being connected with the output end of the main control module of the industrial control equipment; the controlled end of the level conversion module is connected with the output end of the control module, the input end of the level conversion module is connected with the main control module, and the output end of the level conversion module is connected with the access equipment; the control module switches the working mode of the level conversion module under the control of the main control module so as to meet the requirement of the access equipment on an interface.
Further, the level conversion module comprises a first receiver and a first transmitter; one end of the first receiver and one end of the first transmitter are connected with the main control module, the other end of the first receiver and the other end of the first transmitter are connected with the access equipment, and the first transmitter and the first receiver are also connected with the control module.
Further, the level conversion module comprises a second receiver and a second transmitter; one end of the second receiver and one end of the second transmitter are connected with the main control module, and the other end of the second receiver and the other end of the second transmitter are connected with the access equipment.
Further, the level conversion module includes a third receiver and a third transmitter; one end of the third receiver and one end of the third transmitter are connected with the main control module, and the other end of the third receiver and the other end of the third transmitter are connected with the access equipment.
Further, the level conversion module comprises a fourth receiver and a fifth receiver; one end of the fourth receiver and one end of the fifth receiver are connected with the main control module, and the other end of the fourth receiver and the other end of the fifth receiver are connected with the access equipment.
In a second aspect, the present utility model further provides an industrial control device, which includes a main control module and any one of the intelligent switching circuits described above, where the intelligent switching circuit includes a control module and a level conversion module, the control module is connected to the main control module, and the level conversion module is connected to the control module, the main control module, and the access device, respectively.
Further, the intelligent switching circuit comprises a first transmitter, a second transmitter, a third transmitter, a first receiver, a second receiver, a third receiver, a fourth receiver and a fifth receiver; one end of the first receiver and one end of the first transmitter are connected with the main control module, the other end of the first receiver and the other end of the first transmitter are connected with the access equipment, and the first transmitter and the first receiver are also connected with the control module; one end of the second receiver and one end of the second transmitter are connected with the main control module, and the other end of the second receiver and the other end of the second transmitter are connected with the access equipment; one end of the third receiver and one end of the third transmitter are connected with the main control module, and the other end of the third receiver and the other end of the third transmitter are connected with the access equipment; one end of the fourth receiver and one end of the fifth receiver are connected with the main control module, and the other end of the fourth receiver and the other end of the fifth receiver are connected with the access equipment.
Further, the first receiver is connected with an acceptance data interface of the main control module, and the first transmitter is connected with an emission data interface of the main control module.
Further, the second receiver is connected with the carrier detection interface of the main control module, and the second transmitter is ready for interface connection with the data terminal of the main control module.
Further, the third receiver is ready for interfacing with the data of the main control module, and the third transmitter is interfaced with the request transmission interface of the main control module; the fourth receiver is connected with the clearing and sending interface of the main control module, and the fifth receiver is connected with the ringing indication interface of the main control module.
The intelligent switching circuit comprises a control module and a level switching module, the main control module can identify the serial port type of the accessed access equipment, and the working mode of the level switching module is switched through the control module according to the interface type of the access equipment, so that the level switching module meets the requirements of the access equipment on the interfaces, and the industrial control equipment can meet the requirements of different access equipment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of an intelligent switching circuit according to an embodiment of the present utility model;
FIG. 2 is a schematic circuit diagram of an intelligent switching circuit according to an embodiment of the present utility model;
FIG. 3 is a flow chart of an intelligent switching circuit according to an embodiment of the present utility model;
FIG. 4 is a schematic circuit diagram of an intelligent switching circuit according to an embodiment of the present utility model in a first operation mode;
FIG. 5 is a schematic circuit diagram of an intelligent switching circuit according to an embodiment of the present utility model in a second operation mode;
fig. 6 is a schematic circuit diagram of the intelligent switching circuit in a third operation mode according to an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
In addition, directional terms such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc. as used herein refer only to the attached drawings and the direction of the product in use. Accordingly, directional terminology is used to describe and understand the utility model and is not limiting of the utility model. In addition, in the drawings, structures similar or identical to those of the drawings are denoted by the same reference numerals.
Referring to fig. 1 to 6, fig. 1 is a block schematic diagram of an intelligent switching circuit 100 according to an embodiment of the utility model; fig. 2 is a schematic circuit diagram of an intelligent switching circuit 100 according to an embodiment of the utility model;
FIG. 3 is a flow chart of an intelligent switching circuit 100 according to an embodiment of the present utility model; fig. 4 is a schematic circuit diagram of the intelligent switching circuit 100 according to an embodiment of the present utility model in a first operation mode; fig. 5 is a schematic circuit diagram of the intelligent switching circuit 100 according to an embodiment of the present utility model in a second operation mode; fig. 6 is a schematic circuit diagram of the intelligent switching circuit 100 according to an embodiment of the utility model in a third operation mode. As shown in fig. 1, the intelligent switching circuit 100 includes a control module 10 and a level shift module 20; the input end of the control module 10 is used for being connected with the output end of the main control module 200 of the industrial control equipment; the controlled end of the level conversion module 20 is connected with the output end of the control module 10, the input end of the level conversion module 20 is connected with the main control module 200, and the output end of the level conversion module 20 is connected with the access device 300; the control module 10 switches the working mode of the level conversion module 20 under the control of the main control module 200 to meet the requirement of the access device 300 on the interface.
Specifically, the control module 10 is configured to perform logic control, an input end of the control module 10 is connected to the main control module 200 of the industrial control device, and an output end of the control module is connected to the level conversion module 20, so as to perform exchange of data signals and clock signals with the main control module 200. Meanwhile, the main control module 200 may output a control signal to the control module 10, and the control module 10 switches the operation mode of the level conversion module 20 according to the control signal. The industrial control device can be a computer device.
Referring to fig. 3, the level shift module 20 may include a first operation mode, a second operation mode, and a third operation mode. The first mode of operation corresponds to the RS-485 serial access device 300, the second mode of operation corresponds to the RS-422 serial access device 300, and the third mode of operation corresponds to the RS-232 serial access device 300. When the level conversion module 20 is connected with the access devices 300 with different interface types, the main control module 200 controls the level conversion module 20 to switch to the corresponding working mode through the control module 10. For example, if the access device 300 supports the RS-232 serial port, the main control module 200 may switch the working mode of the level conversion module 20 to the third working mode through the control module 10, so as to facilitate the communication between the industrial control device and the access device 300.
As a further embodiment, the level shift module 20 includes a first receiver R1 and a first transmitter T1; one end of the first receiver R1 and one end of the first transmitter T1 are connected with the main control module 200, the other end of the first receiver R1 and the other end of the first transmitter T1 are connected with the access device 300, and the first transmitter T1 and the first receiver R1 are also connected with the control module 10.
One end of the first receiver R1 is connected with the main control module 200, the other end of the first receiver R1 is connected with the access device 300, one end of the first transmitter T1 is connected with the main control module 200, the other end of the first transmitter T1 is connected with the access device 300, and both the first receiver R1 and the first transmitter T1 are further connected with the control module 10.
Referring to fig. 4, in a first operation mode, that is, when the RS-485 serial access device 300 is accessed, the main control module 200 communicates with the control module 10 through IIC, the control module 10 controls the connection mode and the enabling state of the first receiver R1 and the first transmitter T1, when the RS-485 single-ended Data transmission is performed, the control module 10 controls the first transmitter T1 to be in a working state, the first receiver R1 is in a high impedance state, the TXD signal of the industrial control device decomposes the signal into positive and negative symmetrical differential signals NDCD (RS 485 Data-) and NRXD (RS 485 data+) through the first transmitter T1 and transmits the positive and negative symmetrical differential signals NDCD (RS 485 data+) to the access device 300 for Data transmission, when the RS-485 single-ended Data reception is performed, the control module 10 controls the first receiver R1 to be in a working state, the first transmitter T1 is in a high impedance state, and the industrial control device restores the differential signals NDCD (RS 485 Data-) and NRXD (RS 485 data+) transmitted from the device end to be in a RXD signal through the first receiver R1 for Data reception.
Referring to fig. 5, in the second operation mode, that is, when the RS-422 serial access device 300 is accessed, the main control module 200 communicates with the control module 10 through IIC, the control module 10 controls the connection mode and the enabling state of the first receiver R1 and the first transmitter T1, when data communication is performed, the control module 10 controls the first transmitter T1 and the first receiver R1 to be in the operation state, the TXD signal of the industrial control device decomposes the signal into the differential signal NDCD (RS 422T-) and NRXD (RS 422 t+) which are symmetrical in positive and negative through the first transmitter T1 and sends the differential signal NDCD (RS 422T-) and NRXD (RS 422 t+) to the access device 300, and the industrial control device restores the differential signal NTXD (RS 422 r+) and NDTR (RS 422R-) sent by the access device 300 to be the RXD signal through the first receiver R1 and simultaneously receives and sends data.
As a further embodiment, the level shift module 20 includes a second receiver R2 and a second transmitter T2; one end of the second receiver R2 and one end of the second transmitter T2 are both connected with the main control module 200, and the other end of the second receiver R2 and the other end of the second transmitter T2 are both connected with the access device 300.
Further, the level shift module 20 includes a third receiver R3 and a third transmitter T3; one end of the third receiver R3 and one end of the third transmitter T3 are both connected with the main control module 200, and the other end of the third receiver R3 and the other end of the third transmitter T3 are both connected with the access device 300.
Further, the level conversion module 20 includes a fourth receiver R4 and a fifth receiver R5; one end of the fourth receiver R4 and one end of the fifth receiver R5 are both connected with the main control module 200, and the other end of the fourth receiver R4 and the other end of the fifth receiver R5 are both connected with the access device 300.
Referring to fig. 6, in the third operation mode, that is, when the RS-232 serial access device 300 is accessed, the main control module 200 communicates with the control module 10 through IIC, the control module 10 controls the connection mode and the enabling state of the receiver and the transmitter, when data communication is performed, the TXD/DTR/RTS signal level amplitude of the industrial control device is 3.3V, the TXD/DTR/RTS signal level amplitude is boosted to 5V by the first transmitter T1, the second transmitter T2 and the third transmitter T3, and then transmitted to the access device 300 for communication, and the NDCD/NRXD/NDSR/NCTS/NRI signal of the access device 300 is reduced to 3.3V by the first receiver R1, the second receiver R2 and the third receiver R3 and then transmitted to the industrial control device for communication.
The utility model also provides an industrial control device, which comprises a main control module 200 and the intelligent switching circuit 100 in any one of the embodiments, wherein the intelligent switching circuit 100 comprises a control module 10 and a level conversion module 20, the control module 10 is connected with the main control module 200, and the level conversion module 20 is respectively connected with the control module 10, the main control module 200 and the access device 300.
Specifically, the control module 10 is configured to perform logic control, an input end of the control module 10 is connected to the main control module 200, and an output end of the control module 10 is connected to the level conversion module 20, for exchanging data signals and clock signals with the main control module 200. Meanwhile, the main control module 200 may output a control signal to the control module 10, and the control module 10 switches the operation mode of the level conversion module 20 according to the control signal.
Referring to fig. 3, the level shift module 20 may include a first operation mode, a second operation mode, and a third operation mode. The first working mode corresponds to the RS-485 serial access device, the second working mode corresponds to the RS-422 serial access device, and the third working mode corresponds to the RS-232 serial access device. When the level conversion module 20 is connected with the access devices 300 with different interface types, the main control module 200 controls the level conversion module 20 to switch to the corresponding working mode through the control module 10. For example, if the access device 300 supports the RS-232 serial port, the main control module 200 may switch the working mode of the level conversion module 20 to the third working mode through the control module 10, so as to facilitate the communication between the industrial control device and the access device 300.
As a further embodiment, the intelligent switching circuit 100 includes a first transmitter T1, a second transmitter T2, a third transmitter T3, a first receiver R1, a second receiver R2, a third receiver R3, a fourth receiver R4, and a fifth receiver R5; one end of the first receiver R1 and one end of the first transmitter T1 are connected to the main control module 200, the other end of the first receiver R1 and the other end of the first transmitter T1 are connected to the access device 300, and the first transmitter T1 and the first receiver R1 are also connected to the control module 10; one end of the second receiver R2 and one end of the second transmitter T2 are connected to the main control module 200, and the other end of the second receiver R2 and the other end of the second transmitter T2 are connected to the access device 300; one end of the third receiver R3 and one end of the third transmitter T3 are connected to the main control module 200, and the other end of the third receiver R3 and the other end of the third transmitter T3 are connected to the access device 300; one end of the fourth receiver R4 and one end of the fifth receiver R5 are both connected with the main control module 200, and the other end of the fourth receiver R4 and the other end of the fifth receiver R5 are both connected with the access device 300.
Referring to fig. 4, in a first operation mode, that is, when an RS-485 serial access device is accessed, the main control module 200 communicates with the control module 10 through IIC, the control module 10 controls the connection mode and the enabling state of the first receiver R1 and the first transmitter T1, when the RS-485 single-ended Data transmission is performed, the control module 10 controls the first transmitter T1 to be in a working state, the first receiver R1 to be in a high impedance state, the TXD signal of the industrial control device decomposes the signal into positive and negative symmetrical differential signals NDCD (RS 485 Data-) and NRXD (RS 485 data+) through the first transmitter T1 and transmits the positive and negative symmetrical differential signals NDCD (RS 485 Data-) and NRXD (RS 485 data+) to the access device 300 for Data transmission, when the RS-485 single-ended Data reception is performed, the control module 10 controls the first receiver R1 to be in a working state, the first transmitter T1 is in a high impedance state, and the industrial control device restores the differential signals NDCD (RS 485 Data-) and NRXD (RS 485+) transmitted from the device end to be in a RXD signal through the first receiver R1 for Data reception.
Referring to fig. 5, in the second operation mode, that is, when the RS-422 serial access device is accessed, the main control module 200 communicates with the control module 10 through IIC, the control module 10 controls the connection mode and the enabling state of the first receiver R1 and the first transmitter T1, when data communication is performed, the control module 10 controls the first transmitter T1 and the first receiver R1 to be in the operation state, the TXD signal of the industrial control device decomposes the signal into the differential signals NDCD (RS 422T-) and NRXD (RS 422 t+) which are symmetrical in positive and negative through the first transmitter T1 and sends the differential signals NDCD (RS 422 t+) and NRXD (RS 422 t+) to the access device 300, and the industrial control device restores the differential signals NTXD (RS 422 r+) and NDTR (RS 422R-) sent by the access device 300 to be RXD signals through the first receiver R1 and simultaneously receives and sends data.
Referring to fig. 6, in a third operation mode, that is, when an RS-232 serial access device is accessed, the main control module 200 communicates with the control module 10 through IIC, the control module 10 controls the connection mode and the enabling state of the receiver and the transmitter, when data communication is performed, the TXD/DTR/RTS signal level amplitude of the industrial control device is 3.3V, the first transmitter T1, the second transmitter T2 and the third transmitter T3 boost up to 5V and then transmit to the access device 300 for communication, and the access device 300NDCD/NRXD/NDSR/NCTS/NRI signal is reduced to 3.3V through the first receiver R1, the second receiver R2 and the third receiver R3 and then transmit to the industrial control device for communication.
Referring to fig. 2, as a further embodiment, the first receiver R1 is connected to the accept data interface RXD of the master module 200, and the first transmitter T1 is connected to the issue data interface TXD of the master module 200.
Further, the second receiver R2 is connected to the carrier detection interface DCD of the main control module 200, and the second transmitter T2 is connected to the data terminal ready interface DTR of the main control module 200.
Further, the third receiver R3 is connected to the data ready interface DSR of the master control module 200, and the third transmitter T3 is connected to the request to send interface RTS of the master control module 200; the fourth receiver R4 is connected to the clear to send interface CTS of the main control module 200, and the fifth receiver R5 is connected to the ring indication interface RI of the main control module 200.
The industrial control device may include a receive data interface RXD, an issue data interface TXD, a carrier detect interface DCD, a data terminal ready interface DTR, a data ready interface DSR, a request to send interface RTS, a clear to send interface CTS, and a ring indication interface RI. In the first and second modes of operation, only the accept data interface RXD communicates with the first receiver R1 and the transmit data interface TXD communicates with the first transmitter T1. In the third mode of operation, all interfaces communicate with their respective receivers or transmitters.
According to the intelligent switching circuit and the industrial control equipment disclosed by the utility model, the main control module can switch the working modes of the level conversion module through the control module so as to meet the requirements of access equipment with different interface types.
While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (10)
1. An intelligent switching circuit, characterized in that is applied to industrial control equipment, includes:
The input end of the control module is used for being connected with the output end of the main control module of the industrial control equipment;
the controlled end of the level conversion module is connected with the output end of the control module, the input end of the level conversion module is connected with the main control module, and the output end of the level conversion module is connected with the access equipment;
the control module switches the working mode of the level conversion module under the control of the main control module so as to meet the requirement of the access equipment on an interface.
2. The intelligent switching circuit of claim 1, wherein the level shifting module comprises a first receiver and a first transmitter;
One end of the first receiver and one end of the first transmitter are connected with the main control module, the other end of the first receiver and the other end of the first transmitter are connected with the access equipment, and the first transmitter and the first receiver are also connected with the control module.
3. The intelligent switching circuit of claim 2, wherein the level shifting module comprises a second receiver and a second transmitter;
one end of the second receiver and one end of the second transmitter are connected with the main control module, and the other end of the second receiver and the other end of the second transmitter are connected with the access equipment.
4. The intelligent switching circuit of claim 3, wherein the level shifting module comprises a third receiver and a third transmitter;
one end of the third receiver and one end of the third transmitter are connected with the main control module, and the other end of the third receiver and the other end of the third transmitter are connected with the access equipment.
5. The intelligent switching circuit of claim 4, wherein the level shifting module comprises a fourth receiver and a fifth receiver;
One end of the fourth receiver and one end of the fifth receiver are connected with the main control module, and the other end of the fourth receiver and the other end of the fifth receiver are connected with the access equipment.
6. An industrial control device, comprising a main control module and the intelligent switching circuit as claimed in any one of claims 1-5, wherein the intelligent switching circuit comprises a control module and a level conversion module, the control module is connected with the main control module, and the level conversion module is respectively connected with the control module, the main control module and an access device.
7. The industrial control device of claim 6, wherein the intelligent switching circuit comprises a first transmitter, a second transmitter, a third transmitter, a first receiver, a second receiver, a third receiver, a fourth receiver, and a fifth receiver;
One end of the first receiver and one end of the first transmitter are connected with the main control module, the other end of the first receiver and the other end of the first transmitter are connected with the access equipment, and the first transmitter and the first receiver are also connected with the control module;
One end of the second receiver and one end of the second transmitter are connected with the main control module, and the other end of the second receiver and the other end of the second transmitter are connected with the access equipment;
One end of the third receiver and one end of the third transmitter are connected with the main control module, and the other end of the third receiver and the other end of the third transmitter are connected with the access equipment;
One end of the fourth receiver and one end of the fifth receiver are connected with the main control module, and the other end of the fourth receiver and the other end of the fifth receiver are connected with the access equipment.
8. The industrial control device of claim 7, wherein the first receiver is coupled to an accept data interface of the master control module and the first transmitter is coupled to an issue data interface of the master control module.
9. The industrial control device of claim 8, wherein the second receiver is interfaced with a carrier sense interface of the master module and the second transmitter is ready to interface with a data terminal of the master module.
10. The industrial control device of claim 9, wherein the third receiver interfaces with the data ready interface of the master control module, and the third transmitter interfaces with the request transmission interface of the master control module;
The fourth receiver is connected with the clearing and sending interface of the main control module, and the fifth receiver is connected with the ringing indication interface of the main control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420012299.1U CN221631961U (en) | 2024-01-03 | 2024-01-03 | Intelligent switching circuit and industrial control equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420012299.1U CN221631961U (en) | 2024-01-03 | 2024-01-03 | Intelligent switching circuit and industrial control equipment |
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| CN221631961U true CN221631961U (en) | 2024-08-30 |
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| CN202420012299.1U Active CN221631961U (en) | 2024-01-03 | 2024-01-03 | Intelligent switching circuit and industrial control equipment |
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