CN201663309U - Converter for converting USB level to RS422 differential level - Google Patents
Converter for converting USB level to RS422 differential level Download PDFInfo
- Publication number
- CN201663309U CN201663309U CN 201020120804 CN201020120804U CN201663309U CN 201663309 U CN201663309 U CN 201663309U CN 201020120804 CN201020120804 CN 201020120804 CN 201020120804 U CN201020120804 U CN 201020120804U CN 201663309 U CN201663309 U CN 201663309U
- Authority
- CN
- China
- Prior art keywords
- usb
- level
- converter
- utility
- change
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Power Sources (AREA)
- Information Transfer Systems (AREA)
Abstract
The utility model relates to a converter for converting USB level to RS422 differential level. The converter is used for converting the USB level between a wind energy current transformer and a PC machine to an RS422 differential level. The converter comprises a USB interface, a converting circuit and an RS422 communication interface which are electrically connected in sequence. The utility model can achieve effective data exchange between a background PC machine and the wind energy current transformer, meanwhile can carry out light-coupled isolation treatment to TTL level signals in the converter, reduce interferences among signals, improve the reliability of high-speed exchange of data, and well meet market requirements.
Description
Technical field
The utility model relates to a kind of USB changes the RS422 transducer, is used for the USB level between wind energy converter and the PC and the conversion of RS422 differential level.
Background technology
Along with the further developing of wind energy power technology, the data volume that needs between background PC computer and the wind energy converter to exchange also sharply increased, and caused the exchanges data speed between PC and wind energy converter also to need further to be promoted in recent years.And the exchanges data speed between present background PC computer and the wind energy converter can not satisfy the needs of commercial Application.Because the wind energy converter operational environment is more abominable, the reliability of high-speed data exchange is reduced.
The utility model content
The technical problems to be solved in the utility model overcomes above shortcomings in the existing structure exactly, and a kind of reasonable in design, two-forty, high reliability and the RS422 of USB commentaries on classics easily transducer are provided.
The technical scheme in the invention for solving the above technical problem is: a kind of USB changes the RS422 transducer, it is characterized in that: comprise USB interface, change-over circuit and RS422 communication interface; Described USB interface, change-over circuit and RS422 communication interface are electrically connected successively.
Change-over circuit described in the utility model comprises USB-UART change-over circuit, optical coupling isolation circuit and RS422 transceiver; USB interface, USB-UART change-over circuit, optical coupling isolation circuit, RS422 transceiver, RS422 communication interface are electrically connected successively.
RS422 transceiver described in the utility model comprises RS422 transmitter and RS422 receiver, and the RS422 transmitter is electrically connected with optical coupling isolation circuit and RS422 communication interface respectively, and the RS422 receiver is electrically connected with optical coupling isolation circuit and RS422 communication interface respectively.
The utility model compared with prior art has following advantage and effect: 1, reasonable in design; 2, wind energy converter uses the RS422 interface mostly, and the utility model can realize that background PC computer and wind energy converter carry out the active data exchange, and its exchanges data speed can reach 921.6kbps; USB interface has become the main flow interface on the PC, and the utility model can satisfy the needs in market well.3, the light-coupled isolation of RS422 differential signal and usb signal and the independence between power supply, the unreliable factor that brings of crosstalking between erasure signal better.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the circuit diagram of the utility model embodiment.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and by embodiment.
Embodiment:
Referring to Fig. 1 and Fig. 2, the utility model embodiment comprises usb 1, change-over circuit and RS422 communication interface 5.Change-over circuit comprises USB-UART change-over circuit 2, optical coupling isolation circuit 3 and RS422 transceiver 4.Usb 1, USB-UART change-over circuit 2, optical coupling isolation circuit 3, RS422 transceiver 4, RS422 communication interface 5 are electrically connected successively.RS422 transceiver 4 comprises RS422 transmitter 41 and RS422 receiver 42.
At the side circuit design aspect, usb 1 mainly provides power line, positive differential signal USBD+ line, minus tolerance sub-signal USBD-line and ground wire, its by power line from PC stealing to USB-UART change-over circuit 2.
USB-UART change-over circuit 2 main bodys are the integrated USB-UART conversion chip CP2102 of a slice height.This chip internal carries integration USB transceiver and internal clocking oscillator, need not external clock and oscillator.Simultaneously, CP2102 is integrated, and big low capacity is the EEPROM of 1024-Byte, has data messages such as supplier ID, product IDs, product ID, power consumption nameplate and product description statement on it.USB-UART change-over circuit 2 has also comprised the port protection circuit at the USB-UART chip pin except the main body chip.
Optical coupling isolation circuit 3 mainly is made up of two light-coupled isolation chips, respectively transmission level and incoming level is carried out light-coupled isolation.The major function of optical coupling isolation circuit 3 is that the signal that enters USB-UART change-over circuit 2 from the wind energy converter system is carried out light-coupled isolation, disturb to the USB-UART converting system thereby avoid introducing signal from the wind energy converter system in the data transmission procedure, cause the situation of exchanges data failure to occur.Because the highest communication speed of USB can reach 921.6kbps, so that the employing of the optical coupling isolator in the utility model is high speed photo coupling isolating chip HCPL-0710.
The major function of RS422 transceiver 4 is that the Transistor-Transistor Logic level that will be sent to transceiver converts the differential level signal to, by RS422 communication interface 5 it is sent in the wind energy converter system then.Transceiver has independently used two RS422 conversion chips respectively, makes this interface realize full-duplex communication.Added build-out resistor between the AB of RS422 receiver 42, mainly be in the high-speed transfer process, to produce ring efficient, thereby influence laser propagation effect for fear of signal.
Usb 1 is used for being connected with outer PC 5 of RS422 communication interfaces and is connected with wind energy converter.The power supply of RS422 transmitter 41 is to obtain from current transformer by RS422 communication interface 5, and the power supply of this power supply and USB output is isolated fully, can reduce keyset so greatly by the power consumption of USB, also can improve the reliability of usb communication to the PC power taking.Usb 1 is with after PC is connected, and as a universal serial port of PC, the serial ports baud rate of its communication can be selected in 300bps～921.6kbps, and maximum can reach 921.6kbps.
In addition, need to prove, the specific embodiment described in this specification, its zero, the shape of parts, institute's title of being named etc. can be different.Allly conceive equivalence or the simple change that described structure, feature and principle are done, be included in the protection range of the utility model patent according to the utility model patent.
Claims (3)
1. a USB changes the RS422 transducer, it is characterized in that: comprise USB interface, change-over circuit and RS422 communication interface; Described USB interface, change-over circuit and RS422 communication interface are electrically connected successively.
2. USB according to claim 1 changes the RS422 transducer, and it is characterized in that: described change-over circuit comprises USB-UART change-over circuit, optical coupling isolation circuit and RS422 transceiver; USB interface, USB-UART change-over circuit, optical coupling isolation circuit, RS422 transceiver, RS422 communication interface are electrically connected successively.
3. USB according to claim 2 changes the RS422 transducer, it is characterized in that: described RS422 transceiver comprises RS422 transmitter and RS422 receiver, the RS422 transmitter is electrically connected with optical coupling isolation circuit and RS422 communication interface respectively, and the RS422 receiver is electrically connected with optical coupling isolation circuit and RS422 communication interface respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020120804 CN201663309U (en) | 2010-03-01 | 2010-03-01 | Converter for converting USB level to RS422 differential level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020120804 CN201663309U (en) | 2010-03-01 | 2010-03-01 | Converter for converting USB level to RS422 differential level |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201663309U true CN201663309U (en) | 2010-12-01 |
Family
ID=43233730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020120804 Expired - Fee Related CN201663309U (en) | 2010-03-01 | 2010-03-01 | Converter for converting USB level to RS422 differential level |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201663309U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102855211A (en) * | 2012-09-20 | 2013-01-02 | 浙江禾川科技股份有限公司 | Universal serial bus-balanced voltage digital interface converter |
-
2010
- 2010-03-01 CN CN 201020120804 patent/CN201663309U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102855211A (en) * | 2012-09-20 | 2013-01-02 | 浙江禾川科技股份有限公司 | Universal serial bus-balanced voltage digital interface converter |
| CN102855211B (en) * | 2012-09-20 | 2015-04-22 | 浙江禾川科技股份有限公司 | Universal serial bus-balanced voltage digital interface converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203933593U (en) | Half-duplex RS-485 isolation communicating circuit | |
| CN201663309U (en) | Converter for converting USB level to RS422 differential level | |
| CN201414124Y (en) | Isolation RS485 communication speed-raising circuit for low-speed optical coupler | |
| CN201570019U (en) | Passive RS232-485 signal converter | |
| CN101694995B (en) | Passive RS232-485 signal converter | |
| CN103065117B (en) | A kind of bluetooth scanner | |
| CN208796430U (en) | A kind of anti-lost monitoring system of railway Work tool based on wireless communication technique | |
| CN202094891U (en) | Portable universal serial bus (USB)-optical fiber converter for serial communication | |
| CN208334946U (en) | A kind of civil new-type heat exchange station general purpose controller module | |
| CN202906911U (en) | EPON-based electric energy meter optical fiber communication module | |
| CN202334508U (en) | Wireless communication module for communication between terminal facilities with USB (Universal Serial Bus) interfaces | |
| CN203133832U (en) | Anti-jamming communication interface circuit | |
| CN202663433U (en) | Receiving module of RS-485 communication circuit | |
| CN205195778U (en) | Multi -functional thing networking cell -phone | |
| CN203301479U (en) | Embedded power line carrier communication functional chip | |
| CN205081316U (en) | USB3. 0 extension line | |
| CN109830096A (en) | A kind of single-phase double-channel communication module based on HPLC and MBUS | |
| CN203734667U (en) | Bluetooth bridge for realizing long-distance data communication | |
| CN202978945U (en) | Three-phase electric energy meter communication module based on optical fiber communication mode | |
| CN212137647U (en) | Wireless data transmission communication device | |
| CN203708240U (en) | RF-485 signal converter | |
| CN103425616A (en) | SPI (serial peripheral interface)-RS (recommended standard)232 interface conversion chip and communication method of SPI-RS232 interface conversion chip | |
| CN203492081U (en) | Antiskid network modem based on GPRS network | |
| CN210924242U (en) | Ultrasonic signal transmission circuit | |
| CN202172407U (en) | Photoelectric communication converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101201 Termination date: 20150301 |
|
| EXPY | Termination of patent right or utility model |