CN202383821U - Non-polarized RS485 signal communication device - Google Patents
Non-polarized RS485 signal communication device Download PDFInfo
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- CN202383821U CN202383821U CN2011205341396U CN201120534139U CN202383821U CN 202383821 U CN202383821 U CN 202383821U CN 2011205341396 U CN2011205341396 U CN 2011205341396U CN 201120534139 U CN201120534139 U CN 201120534139U CN 202383821 U CN202383821 U CN 202383821U
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Abstract
The utility model discloses a non-polarized RS485 signal communication device. The device comprises a 485 interface circuit and a signal processing module which are both connected with a 485 bus, wherein a signal of the 485 bus is sent to the signal processing module and a CPU module through the 485 interface circuit; the CPU performs conversion judgment according to the incoming 485 signal and sends the signal to the signal processing module; and the signal is returned to the 485 bus through the 485 interface circuit. According to the device provided by the utility model, the signal is sent in a non-polarized manner, and multi-way RS 485 signals with different polarities are connected to the bus; besides, baud rate is self-adaptive and has no influence on bus transmission speed and impedance; and the device can automatically adapt to the 485 signals with two polarities, and can be used in a multiple on-line digital vortex air-conditioning system or an intelligent control system for LED street lamps.
Description
Technical field
The involved a kind of nonpolarity RS485 signal and communication device of the utility model belongs to RS485 signal processing technology field, specially refers to the nonpolarity wiring of RS485 signal.
Background technology
Present much be to use RS485 bus interconnection, for example how online digital scroll air conditioning system in many on-line systems.The RS485 bus signals is to have the differential signal of polarity to transmit by 2, can not be with its reversal connection.
When Network Transmission distance or node for a long time, the continuous line box of branch on the line also can be a lot, be easy to signal wire is connect in the transmission way anti-, thereby cause the signal can't normal transmission.Though can find the trouble spot, when junction box is a lot, also be a very time-consuming thing.
In order to connect up conveniently, the quantity of dividing continuous line box is often greater than the number of modules on the bus.
For indoor heating system, network line generally adds the PVC wire casing even secretly is embedded in the body of wall; For outdoor system, the generally built on stilts or underfloor cabling of circuit causes circuit reversal connection problem is searched and revise very difficulty.On the other hand, for easy construction, also should allow on the way arbitrarily wiring, not polarity.
Need each module can receive positive phase signals shown in Figure 1 for this reason, also can receive the RS485 signal of polarity possibility anti-phase shown in Figure 2.
The utility model content
The involved a kind of nonpolarity RS485 signal and communication device of the utility model, its purpose is to provide a kind of effective device, can be in how online digital scroll air conditioning system; Also can in other RS485 networked systems, realize electrodeless wiring, make that construction is more convenient.
It is following that the utility model solves the problems of the technologies described above the technical scheme of being taked:
A kind of device of nonpolarity RS485 signal and communication comprises:
485 interface circuits, the signal processing module that are connected with 485 buses; Wherein, The signal of 485 buses enters into signal processing module by 485 interface circuits, enters into the CPU module again, and said CPU changes judgement according to 485 signals that transmission is come in; And signal passed to signal processing module, this signal is back in 485 buses through 485 interface circuits again.
Further, preferred construction is between said 485 buses and 485 circuit, to be provided with the lightning protection input/output module.
Further, preferred construction is also to be provided with the data communication pilot lamp of the communication data of designation data on the said CPU module.
Further, preferred construction is, also being provided with provides+and the power module of 12V power supply.
Further, preferred construction is that what said 85 interface circuits adopted is 485 interface chips of MAX.
Further, preferred construction is that said signal processing module comprises CD4030 XOR gate chip.
The utility model has been taked after the such scheme, can be in how online digital scroll air conditioning system; Also can in other RS485 networked systems, realize electrodeless wiring, this device is nonpolarity transmission signal, can receive the RS48 signal of the opposed polarity of multichannel on the bus; And baud rate is adaptive, and to not influence of bus transfer speed and impedance, 485 signals that can two kinds of polarity of self-adaptation can be in how online digital scroll air conditioning system; Also can in other RS485 networked systems, realize electrodeless wiring, make that construction is more convenient, have good technical effect.
Description of drawings
Below in conjunction with accompanying drawing the utility model is carried out detailed description, so that the above-mentioned advantage of the utility model is clearer and more definite.
Fig. 1 is the synoptic diagram of the RS485 signal of a positive;
Fig. 2 is the synoptic diagram of the RS485 signal of a negative;
Fig. 3 is the schematic representation of apparatus of the nonpolarity RS485 signal and communication of the utility model;
Fig. 4 is the application synoptic diagram of the device of the nonpolarity RS485 signal and communication of the utility model;
Fig. 5 is the schematic diagram of the CPU module in the utility model;
Fig. 6 is the power module schematic diagram in the utility model;
Fig. 7 is 485 interface circuit schematic diagrams in the utility model;
Fig. 8 is the synoptic diagram of the data communication indicator light circuit in the utility model;
Fig. 9 is the signal processing module schematic diagram in the utility model;
Figure 10 is the lightning protection input/output module schematic diagram in the utility model.
Wherein, the title of each parts is followed successively by:
CPU module 1,485 interface circuits 3, lightning protection input/output module 2, signal processing module 4, data communication pilot lamp 5, power module 6.
Embodiment
Below in conjunction with accompanying drawing the utility model is carried out detailed description, wherein as shown in Figure 1, the device of said nonpolarity RS485 signal and communication comprises:
485 interface circuits 3, the signal processing module 4 that are connected with 485 buses; Wherein, The signal of 485 buses enters into signal processing module 4 by 485 interface circuits 3, enters into CPU module 1 again, and said CPU changes judgement according to 485 signals that transmission is come in; And signal passed to signal processing module 4, this signal is back in 485 buses through 485 interface circuits again.
Wherein, between said 485 buses and 485 circuit, be provided with lightning protection input/output module 2.
Further, preferred construction is also to be provided with the data communication pilot lamp 5 of the communication data of designation data on the said CPU module 1.
At an embodiment, the utility model is taked is the principle of revision automatically, as long as transmitting terminal sends the immobilized substance data with debit's agreement, if the debit can not correctly receive, then show wiring error, switch bus with regard to pilot relay and connect; Otherwise, do not switch.
Wherein, said software programming input is solidificated in the CPU module, and the input and output of RS485 signal are to transmit through 485 interface circuits, lightning protection input/output module, signal processing module, send then; The CPU module all has the data communication pilot lamp to come the delivery status of designation data.
In the system of the general common many on-line communications of RS48 bus; All form by an off-premises station and Duo Tai indoor set; Just indoor set and off-premises station are master slave relations; With the main frame is the bus benchmark, and then slave is realized nonpolarity wiring on bus, even slave through signal Processing after opposite polarity signal also can correctly receive.
Wherein, in embodiment of the present invention, 1 tunnel RS485 signal is got into through 485 interface circuits 3 respectively after through the lightning protection of lightning protection input/output module 2 by 485 buses; Pass through the transmission of signal processing module 4 again; Enter into CPU module 1 then, 1 pair of RS485 signal of CPU module is handled, and passes through the processing of signal processing module 4 then; Again through 485 interface circuits; Pass through at last on the bus of lightning protection to 485 of lightning protection input and output 2; Simultaneously, whether CPU module 1 control data communication pilot lamp 5 comes the communication data of designation data normal; Power module 6 provides+the 12V power supply for total system, guarantees that total system can work normally.
Fig. 4 is the application synoptic diagram of the device of the nonpolarity RS485 signal and communication of the utility model; As shown in the figure; This equipment is applicable in the system of how online digital scroll air conditioning system and all RS485 signal combined network communication; Wherein, This system mainly comprises and is connected outdoor unit and a plurality of indoor unit on the RS485 bus, and outdoor unit and a plurality of indoor unit only have one to be in transmit status during communication, and remaining element all is in accepting state.The indoor set that is in accepting state can non-polar connecting bus.
In addition, in this embodiment, what said 485 interface circuits adopted is 485 interface chips of MAX.And that the lightning protection input/output module adopts is TVS and lightning protection discharge tube BF091M.
In addition, what signal processing module adopted is CD4030 XOR gate chip, and what the data communication pilot lamp adopted is the LED light emitting diode.
What in addition, the CPU module adopted is the 8 8-digit microcontroller process chip of PIC18F6527.
Simultaneously, all components and parts designs of this device are on the printed circuit board of 200 * 100mm.
Fig. 5 is the schematic diagram of the CPU module in the utility model; Fig. 6 is the power module schematic diagram in the utility model; Fig. 7 is 485 interface circuit schematic diagrams in the utility model; Fig. 8 is the synoptic diagram of the data communication indicator light circuit in the utility model;
Fig. 9 is the signal processing module schematic diagram in the utility model; Figure 10 is the lightning protection input/output module schematic diagram in the utility model.
The utility model has been taked after the such scheme, can be in how online digital scroll air conditioning system; Also can in other RS485 networked systems, realize electrodeless wiring, this device is nonpolarity transmission signal, can receive the RS48 signal of the opposed polarity of multichannel on the bus; And baud rate is adaptive, and to not influence of bus transfer speed and impedance, 485 signals that can two kinds of polarity of self-adaptation can be in how online digital scroll air conditioning system; Also can in other RS485 networked systems, realize electrodeless wiring, make that construction is more convenient, have good technical effect.
In addition, all be simple direct illumination based on present employed high-power LED street lamp major part, lack necessary Based Intelligent Control, but also can realize the Based Intelligent Control of LED street lamp through 485 networked systems.Promptly this nonpolarity RS485 signal and communication device can be used in the LED intelligent street lamp control system.Except that street lamp, can control other LED illuminating devices equally, not be elaborated at this.
It should be noted that; Above-mentioned specific embodiment only is exemplary; Under the above-mentioned instruction of the utility model, those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description, and these improve or distortion drops in the protection domain of the utility model.
It will be understood by those skilled in the art that top specific descriptions just in order to explain the purpose of the utility model, are not to be used to limit the utility model.The protection domain of the utility model is limited claim and equivalent thereof.
Claims (6)
1. the device of a nonpolarity RS485 signal and communication is characterized in that, comprising: 485 interface circuits, the signal processing module that are connected with 485 buses; Wherein, The signal of 485 buses enters into signal processing module by 485 interface circuits, enters into the CPU module again, and said CPU changes judgement according to 485 signals that transmission is come in; And signal passed to signal processing module, this signal is back in 485 buses through 485 interface circuits again.
2. the device of nonpolarity RS485 signal and communication according to claim 1 is characterized in that, between said 485 buses and 485 circuit, is provided with the lightning protection input/output module.
3. the device of nonpolarity RS485 signal and communication according to claim 1 and 2 is characterized in that, also is provided with the data communication pilot lamp of the communication data of designation data on the said CPU module.
4. the device of nonpolarity RS485 signal and communication according to claim 1 and 2 is characterized in that, also being provided with provides+and the power module of 12V power supply.
5. the device of nonpolarity RS485 signal and communication according to claim 1 and 2 is characterized in that, what said 85 interface circuits adopted is 485 interface chips of MAX.
6. the device of nonpolarity RS485 signal and communication according to claim 5 is characterized in that, said signal processing module comprises CD4030 XOR gate chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205341396U CN202383821U (en) | 2011-12-20 | 2011-12-20 | Non-polarized RS485 signal communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205341396U CN202383821U (en) | 2011-12-20 | 2011-12-20 | Non-polarized RS485 signal communication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202383821U true CN202383821U (en) | 2012-08-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205341396U Expired - Fee Related CN202383821U (en) | 2011-12-20 | 2011-12-20 | Non-polarized RS485 signal communication device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202383821U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882508A (en) * | 2012-08-30 | 2013-01-16 | 广州市捷众科贸有限公司 | Simple circuit for switching polarity of RS485 interface |
| CN110196828A (en) * | 2019-05-28 | 2019-09-03 | 深圳市雷赛软件技术有限公司 | Support the communicating circuit and the means of communication of RS485 half-duplex protocol |
-
2011
- 2011-12-20 CN CN2011205341396U patent/CN202383821U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882508A (en) * | 2012-08-30 | 2013-01-16 | 广州市捷众科贸有限公司 | Simple circuit for switching polarity of RS485 interface |
| CN110196828A (en) * | 2019-05-28 | 2019-09-03 | 深圳市雷赛软件技术有限公司 | Support the communicating circuit and the means of communication of RS485 half-duplex protocol |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20131220 |