CN201319138Y - Anti-interference repeater used for PLC to count in high speed - Google Patents
Anti-interference repeater used for PLC to count in high speed Download PDFInfo
- Publication number
- CN201319138Y CN201319138Y CNU2008202304730U CN200820230473U CN201319138Y CN 201319138 Y CN201319138 Y CN 201319138Y CN U2008202304730 U CNU2008202304730 U CN U2008202304730U CN 200820230473 U CN200820230473 U CN 200820230473U CN 201319138 Y CN201319138 Y CN 201319138Y
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- plc
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- repeater
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Abstract
The utility model discloses an anti-interference repeater used for PLC to count in high speed, which comprises a RS-485 data cable, a sensor and a high-speed counter module of a PLC, and is characterized in that the repeater adopts a RS 485 chip, is designed according to the standard of the RS-485, and is connected with an isolated chip, and the repeater is divided into two modules which are connected by the RS-485 data cable, wherein the module A is used to connect with a high-speed counting sensor, and the sensor sends out difference signals through the isolating chip and a RS 485 receiving-transmitting chip, and a module B is used to receive and reduce the difference signals of the module A into digital signals to connect to the input end of the high-speed counter module of the PLC. The anti-interference repeater used for PLC to count in high speed adopts the RS-485 standard, and meanwhile, a RS-485 circuit has the advantages of convenient control, low production cost and the like, and satisfies the requirements of high-speed counting of the PLC.
Description
Technical field
The utility model relates to anti-electromagnetic interference (EMI) field, especially a kind of jamproof repeater of PLC high-speed counting that is used for.
Background technology
PLC high-speed counting function often makes because of electromagnetic interference (EMI) to count makes mistakes or can't move, and mainly appears at 1, is having under the environment of strong electromagnetic; 2, tachogenerator distance P LC has electromagnetic noise than far away and surrounding environment; 3, the frequency of tested nothing or rotating speed are very high and distance P LC is far away.Modern society in industrial develop rapidly, system makes mistakes or can't the operation meeting bring the loss that can't estimate to enterprise, so, just need have that suitable strong noise suppresses, the communications platform of high relatively transfer rate, long transmission distance, wide common mode range serves.
Summary of the invention
The purpose of this utility model is in order to solve the accurate realization of PLC high-speed counting function, to propose a kind of jamproof repeater of PLC high-speed counting that is used for.
For this reason, the technical solution of the utility model is, be used for the jamproof repeater of PLC high-speed counting, the high-speed counter module that comprises RS-485 data cable, sensor, PLC, it is characterized in that: what repeater adopted is the RS485 chip, standard design according to RS-485, be connected with isolating chip, being divided into two modules connects with the RS-485 data cable, modules A wherein: be used to connect the sensor of high-speed counting, sensor sends with the form of differential signal through isolating chip and RS485 transceiving chip; Module B: be used for the differential signal reception of modules A is reduced into the input end that digital signal is connected to the high-speed counter module of PLC.
Beneficial effect:
The utility model is owing to adopted the RS-485 standard, the RS-485 standard be often used as have that suitable strong noise suppresses, the communications platform of high relatively transfer rate, long transmission distance, wide common mode range, the RS-485 circuit has advantages such as control is convenient, with low cost simultaneously.
So because the above-mentioned advantage of this data transfer mode can satisfy the requirement of PLC high-speed counting.The frequency that is fit to high-speed counting is 1Mhz (10 meters distances), 10Mhz (100 meters distances), 100Mhz (1000 meters distances).
Description of drawings
Fig. 1 is a circuit connection diagram of the present utility model.
Embodiment
As shown in Figure 1, repeater of the present utility model adopts RS485 chip 1, isolating chip 2, standard design according to RS485, be divided into two modules, wherein modules A: be used to connect the sensor 4 of high-speed counting, near the modules A of the anti-interference repeater of PLC high-speed counting the signal of sensor is at first received, form through isolating chip and 485 transceiving chips-differential signal is sent, and is transferred to the module B of the anti-interference repeater of PLC high-speed counting in a distant place by RS-485 data cable 3; Module B: through 485 transceiving chips and isolating chip differential signal is reduced to digital signal, digital signal is connected to the high-speed counting input end 5 of PLC.
That isolating chip preferably adopts is U.S. Analog Devices, the AduM14xxW digital isolator of Inc. (being called for short ADI company).This novel isolating chip is U.S. Analog Devices, Inc. the AduM14xxW digital isolator of (be called for short ADI company), four-way AduM140xW digital isolator adopts the proprietary iCoupler chip-scale miniature transformer technology of ADI company, flank speed reaches 25Mbps, and the iCoupler digital isolator is to temperature-insensitive, has reliability, the iCoupler product has digital interface, do not need external signal conditioning element, and the power consumption of iCoupler digital isolator only is the 1/10-1/6 of photoelectrical coupler under identical signal data rate.
Claims (1)
1, is used for the jamproof repeater of PLC high-speed counting, the high-speed counter module that comprises RS-485 data cable, sensor, PLC, it is characterized in that: what repeater adopted is the RS485 chip, standard design according to RS-485, be connected with isolating chip, be divided into two modules and connect with the RS-485 data cable, wherein modules A: be used to connect the sensor of high-speed counting, sensor sends with the form of differential signal through isolating chip and RS485 transceiving chip; Module B: be used for the differential signal reception of modules A is reduced into the input end that digital signal is connected to the high-speed counter module of PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202304730U CN201319138Y (en) | 2008-12-15 | 2008-12-15 | Anti-interference repeater used for PLC to count in high speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202304730U CN201319138Y (en) | 2008-12-15 | 2008-12-15 | Anti-interference repeater used for PLC to count in high speed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201319138Y true CN201319138Y (en) | 2009-09-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202304730U Expired - Fee Related CN201319138Y (en) | 2008-12-15 | 2008-12-15 | Anti-interference repeater used for PLC to count in high speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201319138Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110888384A (en) * | 2019-10-23 | 2020-03-17 | 湖南柿竹园有色金属有限责任公司 | High-interference filtering method for PLC analog input signal source |
-
2008
- 2008-12-15 CN CNU2008202304730U patent/CN201319138Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110888384A (en) * | 2019-10-23 | 2020-03-17 | 湖南柿竹园有色金属有限责任公司 | High-interference filtering method for PLC analog input signal source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HUBEI HUACHANGDA ELECTRICAL AND MECHANICAL CO., LT Free format text: FORMER NAME: SHIYAN HUA-CHANGDA ELECTROMECHANICAL CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 442004 Shiyan City, Hubei Province Zhang Wan West Road No. 31 Patentee after: Hubei huachangdaelectromechanical Limited by Share Ltd Address before: 442004 Shiyan City, Hubei Province Zhang Wan West Road No. 31 Patentee before: Huachang Electromechanic Co., Ltd., Shiyan |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090930 Termination date: 20161215 |