CN205959192U - Communication connects converting circuit - Google Patents
Communication connects converting circuit Download PDFInfo
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- CN205959192U CN205959192U CN201620670250.0U CN201620670250U CN205959192U CN 205959192 U CN205959192 U CN 205959192U CN 201620670250 U CN201620670250 U CN 201620670250U CN 205959192 U CN205959192 U CN 205959192U
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Abstract
The utility model discloses a communication connects converting circuit, aim at providing the communication connects converting circuit that a plurality of joints of being convenient for carry out signal transmission jointly, it causes the circuit complicated to have solved multiple communication mode, the inconvenient problem of communication, its technical scheme main points are through RS485 interface no. 1, the RS485 interface two, dial switch, the RS485 transmit -Receive unit one, the RS485 transmit -Receive unit two, USB communication translation unit, the circuit structure that USB interface device spare was built, the selection and the conversion that realize multiple channel have been reached, can be with RS232, the RS485 communication is establish with the USB communication and is connected and changes, transmission and interactive effect of convenient data.
Description
Technical field
The utility model is related to PLC communicating circuit technical field, particularly to communication connector change-over circuit.
Background technology
In commercial Application, PLC as controller be frequent select, PLC and other controllers need to carry out each other it
Between communication, and be also to need to carry out communicating to connect, to realize information transmission each other and control between multiple PLC
System.
At present, in Industry Control occasion, RS485 bus is simple because of its interface, and networking is convenient, the features such as long transmission distance
It is used widely.
The same communication interface being all based on serial ports of RS485 with RS232, the operation of data transmit-receive is consistent, so making
It is the bsp driver of same WinCE.But they in actual applications communication mode but have very big difference,
RS232 interface is full-duplex data communication mode, and RS485 interface is half-duplex data communication mode, and the transmitting-receiving of data can not
Carry out simultaneously, when industrial computer is typically all and is used using RS485 or RS232 interface simultaneously, just cannot use a work
Industry counting machine carries out data transmission, and the data-interface of industrial computer using more be to adopt USB interface, two will be realized
Conversion between person, improves to existing technology.
Utility model content
In view of the shortcomings of the prior art, the purpose of this utility model is to provide to be easy to multiple joints and jointly carry out signal
The communication connector change-over circuit of transmission.
Above-mentioned technical purpose of the present utility model technical scheme is that：A kind of communication connector conversion
Circuit, including RS485 interface one, RS485 interface two, toggle switch, RS485 Transmit-Receive Unit one, RS485 Transmit-Receive Unit two, USB
Communication converting unit, USB interface；
RS485 interface one passes through toggle switch and RS485 Transmit-Receive Unit one and communicates to be connected, RS485 Transmit-Receive Unit one and USB
Communication converting unit communication connects, and USB communication converting unit connects USB interface；
RS485 interface two passes through toggle switch and RS485 Transmit-Receive Unit two and communicates to be connected, RS485 Transmit-Receive Unit two and USB
Communication converting unit communication connects；
Described toggle switch is in order to switch the connection of RS485 interface one or RS485 interface two.
By above-mentioned setting, RS485 interface one in order to connect the controllers such as PLC, and can carry out signal transmission,
RS485 interface two is also in the same manner, then by USB communicate converting unit RS485 communications protocol is changed, thus realize by
RS485 communication is converted to USB communication, and USB interface may be coupled on industrial computer.
Can be preferably as concrete scheme of the present utility model：Described RS485 Transmit-Receive Unit one is single with USB communication conversion
It is also associated with RS232 Transmit-Receive Unit between unit.
By above-mentioned setting, after RS232 Transmit-Receive Unit and USB communication converting unit connection, can be by the communication of RS232
Mode is converted to the mode of the communication interface of USB.
Can be preferably as concrete scheme of the present utility model：Described RS485 Transmit-Receive Unit two is single with USB communication conversion
It is also associated with optocoupler driver element between unit.
By above-mentioned setting, optocoupler driver element employs photoelectrical coupler, improves antinoise signal interference performance, photoelectric coupling
Device operation principle is：When light emitting diode drives a current through, conducting is luminous, and phototriode receives light, by ending
It is changed into turning on.Light emitting diode in photoelectrical coupler is current driving element, and enough energy will be had could to drive.And disturb
Although some magnitudes of voltage of signal are very high, energy less it is impossible to make LEDs ON light, so interference signal can not be entered
Enter it is achieved that electrically insulating.
Can be preferably as concrete scheme of the present utility model：Described RS485 Transmit-Receive Unit one adopts SN65LBC184
Chip.
By above-mentioned setting, can effectively realize RS485 communication modes are carried out at signal using SN65LBC184 chip
Reason.
Can be preferably as concrete scheme of the present utility model：Described RS232 Transmit-Receive Unit adopts MAX232ESE core
Piece.
By above-mentioned setting, using MAX232ESE chip, it is possible to achieve signal transacting is carried out to RS232 communication modes.
Can be preferably as concrete scheme of the present utility model：Described USB communication converting unit adopts FT232BL core
Piece.
By above-mentioned setting, its major function is to realize protocol conversion between USB and serial i/O mouth.Chip one side can
To receive the usb data sent from PC main frame, and it is converted into serial i/O data form and is sent to microcontroller serial port；Another
The data form that the data that aspect can send single-chip microcomputer from serial ports is converted to USB passes PC main frame back.Middle conversion work is complete
Portion is automatically performed by chip.
Can be preferably as concrete scheme of the present utility model：Described USB communication converting unit also includes and FT232BL
The serial interface memory that chip connects.Described serial interface memory adopts 93C46A chip.
By above-mentioned setting, the serial interface memory extending out can be used to data buffer storage, effectively improves efficiency of transmission.
In sum, the utility model has the advantages that：Realize selection and the conversion of multiple channels, can be by
RS232, RS485 communication is connected and changes with USB communication foundation, the transmission of convenient data and interaction.
Brief description
Fig. 1 is the structured flowchart of the present embodiment；
Fig. 2 is the circuit diagram one of the present embodiment；
Fig. 3 is the circuit diagram two of the present embodiment；
Fig. 4 is the circuit diagram three of the present embodiment.
In figure 1, RS485 interface one；2nd, RS485 interface two；3rd, toggle switch；4th, RS485 Transmit-Receive Unit one；5、RS485
Transmit-Receive Unit two；6th, USB communication converting unit；7th, USB interface；8th, RS232 Transmit-Receive Unit；9th, optocoupler driver element；10th, serial
Interface memory.
Specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Embodiment：As shown in figure 1, a kind of communication connector change-over circuit, including RS485 interface 1, RS485 interface 22,
Toggle switch 3, RS485 Transmit-Receive Unit 1, RS485 Transmit-Receive Unit 25, USB communication converting unit 6, USB interface 7；RS485 connects
Mouth 1 is passed through toggle switch 3 and is connected with RS485 Transmit-Receive Unit 1 communication, and RS485 Transmit-Receive Unit 1 and USB communication are changed single
Unit 6 communication connects, and USB communication converting unit 6 connects USB interface 7；RS485 interface 22 passes through toggle switch 3 and RS485 transmitting-receiving
Unit 25 communication connects, and RS485 Transmit-Receive Unit 25 communicates converting unit 6 communication with USB and is connected；Toggle switch 3 is in order to switch
RS485 interface 1 or the connection of RS485 interface 22.It is also connected between RS485 Transmit-Receive Unit 1 and USB communication converting unit 6
There is RS232 Transmit-Receive Unit 8.It is also associated with optocoupler driver element 9 between RS485 Transmit-Receive Unit 25 and USB communication converting unit 6.
Signal can be realized from RS485 interface 1, RS485 Transmit-Receive Unit 1, USB communication conversion by toggle switch 3
Unit 6, USB interface 7 are passed on successively, can also carry out the transmission of data by RS232 Transmit-Receive Unit 8, then be transmitted across
The isolation of signal can also be carried out by optocoupler driver element 9 in journey.
As described in Figure 2, there are two path channels, respectively A, B channel and X, Y-channel in figure.From A, B of in figure as a road
Signal, RS485 Transmit-Receive Unit 1 adopts SN65LBC184 chip, is selected by toggle switch 3, can select leading to of A, B
News channel or the communication channel selecting X, Y.The circuit structure of RS485 Transmit-Receive Unit 1 and the electricity of RS485 Transmit-Receive Unit 25
Line structure is identical.The two-way signaling of first SN65LBC184 chip U9 is TXD1, RXD1, second SN65LBC184 chip
The two-way signaling of U10 is TXD2, RXD2.And RS232 Transmit-Receive Unit 8 adopts MAX232ESE chip.Two-way signaling be TXD1,
RXD1 is also transmitted to MAX232ESE chip U11, and is converted to TX and RX signal, TX and RX signal can be with outside RS232 number
Communicated according to interface.USB communication converting unit 6 adopts FT232BL chip.Wherein 25 pins and 24 pins are as the receipts of signal
Send out pin, in the diagram for TXD and RXD, this two pins can connect TXD1, RXD1 or TXD2, RXD2 respectively.
As shown in figure 4, USB communicates the serial interface memory 10 that converting unit 6 also includes being connected with FT232BL chip.
Serial interface memory 10 adopts 93C46A chip.
In fig. 2,8 pin of chip U9 connect power supply VCC2, and channel A is connected to 6 pin of signal U9 by resistance R24, letter
Road B connects 7 pin of chip U9 by resistance R25.Wherein, A channel and B channel pass through diode D4, diode D6 respectively and are grounded.
In Fig. 4, USB communication converting unit 6 is the minimum system of composition with FT232BL chip as core, and chip U3 connects
It is connected to crystal oscillator Y1, and there are multiple signal lamps, be D1 and D2 in Fig. 4.
By above-mentioned setting, RS485 interface 1 in order to connect the controllers such as PLC, and can carry out signal biography
Pass, RS485 interface 22 is also in the same manner, then converting unit 6 is communicated by USB and RS485 communications protocol is changed, thus
Realize for RS485 communication being converted to USB communication, and USB interface 7 may be coupled on industrial computer.
This specific embodiment is only that it is not to restriction of the present utility model, ability to explanation of the present utility model
Field technique personnel can make to the present embodiment after reading this specification as needed does not have the modification of creative contribution, but
As long as all being protected by Patent Law in right of the present utility model.
Claims (8)
1. a kind of communication connector change-over circuit it is characterised in that：Including RS485 interface one (1), RS485 interface two (2), dial-up
Switch (3), RS485 Transmit-Receive Unit one (4), RS485 Transmit-Receive Unit two (5), USB communication converting unit (6), USB interface (7)；
RS485 interface one (1) is passed through toggle switch (3) and is connected with RS485 Transmit-Receive Unit one (4) communication, RS485 Transmit-Receive Unit one
(4) it is connected with USB communication converting unit (6) communication, USB communication converting unit (6) connects USB interface (7)；
RS485 interface two (2) is passed through toggle switch (3) and is connected with RS485 Transmit-Receive Unit two (5) communication, RS485 Transmit-Receive Unit two
(5) it is connected with USB communication converting unit (6) communication；
Described toggle switch (3) is in order to switch the connection of RS485 interface one (1) or RS485 interface two (2).
2. communication connector change-over circuit according to claim 1 it is characterised in that：Described RS485 Transmit-Receive Unit one (4) with
It is also associated with RS232 Transmit-Receive Unit (8) between USB communication converting unit (6).
3. communication connector change-over circuit according to claim 2 it is characterised in that：Described RS485 Transmit-Receive Unit two (5) with
It is also associated with optocoupler driver element (9) between USB communication converting unit (6).
4. communication connector change-over circuit according to claim 1 it is characterised in that：Described RS485 Transmit-Receive Unit one (4) is adopted
Use SN65LBC184 chip.
5. communication connector change-over circuit according to claim 2 it is characterised in that：Described RS232 Transmit-Receive Unit (8) adopts
MAX232ESE chip.
6. communication connector change-over circuit according to claim 1 it is characterised in that：Described USB communication converting unit (6) is adopted
Use FT232BL chip.
7. communication connector change-over circuit according to claim 6 it is characterised in that：Described USB communication converting unit (6) is also
Including the serial interface memory (10) being connected with FT232BL chip.
8. communication connector change-over circuit according to claim 7 it is characterised in that：Described serial interface memory (10) is adopted
Use 93C46A chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620670250.0U CN205959192U (en) | 2016-06-25 | 2016-06-25 | Communication connects converting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620670250.0U CN205959192U (en) | 2016-06-25 | 2016-06-25 | Communication connects converting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205959192U true CN205959192U (en) | 2017-02-15 |
Family
ID=57969263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620670250.0U Active CN205959192U (en) | 2016-06-25 | 2016-06-25 | Communication connects converting circuit |
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|---|---|
| CN (1) | CN205959192U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113985833A (en) * | 2021-12-18 | 2022-01-28 | 嘉兴职业技术学院 | Industrial RS485 communication test module |
-
2016
- 2016-06-25 CN CN201620670250.0U patent/CN205959192U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113985833A (en) * | 2021-12-18 | 2022-01-28 | 嘉兴职业技术学院 | Industrial RS485 communication test module |
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| GR01 | Patent grant |