CN207319228U - A kind of industrial USB turns RS485 signal adapters - Google Patents
A kind of industrial USB turns RS485 signal adapters Download PDFInfo
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- CN207319228U CN207319228U CN201721444562.0U CN201721444562U CN207319228U CN 207319228 U CN207319228 U CN 207319228U CN 201721444562 U CN201721444562 U CN 201721444562U CN 207319228 U CN207319228 U CN 207319228U
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Abstract
The utility model provides a kind of industrial USB and turns RS485 signal adapters, including：DC D/C powers circuit, USB turn TTL circuits, 485 turns of TTL circuits, signal isolation circuit, condition indication circuit and filter regulator circuit；The USB turns TTL circuits and is located at USB ends, and 485 turns of TTL circuits are located at RS485 ends；The signal isolation circuit turns TTL circuits with the USB respectively and 485 turns of TTL circuits are connected, and the USB turns TTL circuits and is also connected with the condition indication circuit；The DC D/C powers circuit turns TTL circuits, 485 turns of TTL circuits, signal isolation circuit, condition indication circuit and filter regulator circuit with USB and is connected respectively.The utility model is by the way that USB interface and RS485 interfaces are changed, usb signal and RS485 signals are subjected to complementary combination, so as to solve the problems, such as that industrial equipment is docked with the interface of computer, data transmission bauds and data reliability are improved, compensate for slow transmission speed, poor reliability, installation trouble and the deficiency of transmission range limitation.
Description
Technical field
Chromacoder is the utility model is related to, a kind of particularly industrial USB turns RS485 signal adapters.
Background technology
Society is constantly progressive now, and computer continues to develop, and computer external interface is gradually converted into by series model
USB2.0 interface modes, i.e. USB Universal Serial Bus Interface.Its interface has transmission speed fast, supports hot plug and connection
The characteristics of multiple equipment, have very big advantage.
And main interface to be applied is RS485 interfaces in present industrial production, RS485 interfaces are that the communication based on serial ports connects
Mouthful, using differential signal negative logic, there is the advantages of long transmission distance, implementation is simple, and networking facilitates.It is and many in industrial production
Program is required for realizing by computer, it is therefore desirable to solve the problems, such as to dock with the interface of computer, realize usb signal with
Conversion between RS485 signals, very big facility will be brought for industrial production.
Utility model content
The purpose of this utility model is to provide a kind of industrial USB and turns RS485 signal adapters, it is intended to solves industrial equipment
The problem of being docked with computer interface, improves data transmission bauds and data reliability, increases data transmission distance, realizes a kind of
Quickly, remote data acquisition system reliably, inexpensive.
To reach above-mentioned technical purpose, the utility model provides a kind of industrial USB and turns RS485 signal adapters, bag
Include：It is steady that DC-DC power source circuit, USB turn TTL circuits, 485 turns of TTL circuits, signal isolation circuit, condition indication circuit and filtering
Volt circuit；
The USB turns TTL circuits and is located at USB ends, and 485 turns of TTL circuits are located at RS485 ends；
The signal isolation circuit turns TTL circuits with the USB respectively and 485 turns of TTL circuits are connected, and the USB turns
TTL circuits are also connected with the condition indication circuit；
The DC-DC power source circuit turns TTL circuits with USB respectively, 485 turns of TTL circuits, signal isolation circuit, states refer to
Show that circuit is connected with filter regulator circuit.
Preferably, the DC-DC power source circuit is by NXPHI B0505S-1W modular power source chip U3 and peripheral circuit group
Into, one end connection power input ground terminal of capacitance C5, other end connection 5V power inputs；One end connection power supply of capacitance C7 is defeated
Go out ground terminal, other end connection 5V power supply outputs；The pin 1 of chip U3 connects 5V power inputs, and pin 2 connects power input ground connection
End, pin 3 connect power supply output ground terminal, and pin 4 connects the output of 5V power supplys.
Preferably, the USB turns TTL circuits and is made of FT232RL interface conversion chip U1 and peripheral circuit；
Capacitance C1 one end connects power input ground terminal, and is connected with the pin 18 of chip U1, other end connection chip U1
Pin 17；Capacitance C2 one end connection 5V power inputs, and with the pin 20 of chip U1 and the pin 1 of USB_B interfaces U2
It is connected, another termination power input ground terminal；The pin 15 of chip U1 connects the pin 3 of USB_B interfaces U2；The pin of chip U1
The pin 2 of 16 connection USB_B interfaces U2；It is defeated that pin 7, pin 18, pin 21, pin 25 and the pin 26 of chip U1 connects power supply
Enter ground terminal, pin 4 and pin 20 connect 5V power inputs.
Preferably, 485 turns of TTL circuits are made of SN65HVD3082 chips U5 and peripheral circuit；
The pin 2 and pin 3 of chip U5 connects；One end connection power supply output ground terminal of resistance R7, and with chip U5's
Pin 5 is connected, the pin 7 of resistance R7 other ends connection chip U5 and the positive terminal of TVS diode TVS2, and insures with self- recoverage
One end of PTC2 is connected；One end connection 5V power supply outputs of resistance R4, and be connected with the pin 8 of chip U5, another termination core
The pin 6 of piece U5 and the positive terminal of TVS diode TVS1, and be connected with one end of self- recoverage insurance PTC1；TVS diode TVS1
It is connected with the negative pole end of TVS diode TVS2, and connects power supply output ground terminal at the same time；The other end of self- recoverage insurance PTC1 leads to
Forward end A+ output difference signals are crossed, the other end of self- recoverage insurance PTC2 passes through backward end B- output difference signals.
Preferably, the signal isolation circuit by two 6N137 chips U4, U6 and a TLP521-1 isolating chips U7 with
And peripheral circuit composition；
The input terminal pin 3 of a chip termination U4 of resistance R5, the pin 1 of another chip termination U5；The pin 2 of chip U4
High level is connect, pin 5 connects power input ground terminal；A termination 5V power inputs of resistance R3, and pin 7 with chip U4, draw
Foot 8 is connected, the collector pin 6 of another chip termination U4, and is connected with the pin 5 of chip U1；One end connection core of resistance R21
The pin 13 of piece U1, the pin 1 of other end connection chip U7；Resistance R22 one end connection power supply output ground terminal, other end connection
The pin 3 of chip U7 and the pin 2 of chip U5 and pin 3；The pin 4 of chip U7 connects the output of 5V power supplys, and pin 2 connects electricity
Source input grounding end；A termination 5V power inputs of resistance R10, and be connected with the pin 2 of chip U6, another chip termination U1's
One end of pin 1 and resistance R9, the input terminal pin 3 of another chip termination U6 of resistance R9；A termination power of capacitance C6 is defeated
Go out ground terminal, and be connected with the pin 5 of chip U6, the output of another termination 5V power supplys, and with the pin 7, pin 8 and electricity of chip U6
One end of resistance R8 is connected, the pin 6 of another chip termination U6 of resistance R8, and is connected with the pin 4 of chip U5.
Preferably, the condition indication circuit is specially：
One end connection 5V power inputs of resistance R2, other end sending and receiving optical diode TX anodes, light emitting diode TX cathodes
Connect the pin 23 of chip U1；One end connection 5V power inputs of resistance R6, other end connection connecting luminous diode RX anodes,
The pin 22 of light emitting diode RX cathodes connection chip U1.
Preferably, the filter regulator circuit is specially：
The cathode of capacitance C4 connects 5V power inputs, and is connected with one end of capacitance C3, and it is defeated that the anode of capacitance C4 connects power supply
Enter ground terminal, and be connected with the other end of capacitance C3.
The effect provided in utility model content is only the effect of embodiment, rather than whole effects that utility model is all
Fruit, a technical solution in above-mentioned technical proposal has the following advantages that or beneficial effect：
Compared with prior art, the utility model is by the way that USB interface and RS485 interfaces are changed, by usb signal with
RS485 signals carry out complementary combination, so as to solve the problems, such as that industrial equipment is docked with the interface of computer, improve data and pass
Defeated speed and data reliability, compensate for slow transmission speed, poor reliability, installation trouble and the deficiency of transmission range limitation,
Realize a kind of quick, reliable, low cost remote data acquisition system.
Brief description of the drawings
Fig. 1 is that a kind of industrial USB provided in the utility model embodiment turns RS485 signal adapter structural representations
Block diagram；
Fig. 2 is a kind of DC-DC power source circuit diagram provided in the utility model embodiment；
Fig. 3 is that a kind of USB provided in the utility model embodiment turns TTL circuit diagrams；
Fig. 4 is 485 turns of TTL circuit diagrams of one kind provided in the utility model embodiment；
Fig. 5 is a kind of signal isolation circuit schematic diagram provided in the utility model embodiment；
Fig. 6 is a kind of condition indication circuit schematic diagram provided in the utility model embodiment；
Fig. 7 is a kind of filter regulator circuit schematic diagram provided in the utility model embodiment.
Embodiment
In order to the technical characterstic of clear explanation this programme, below by embodiment, and its attached drawing is combined, to this
Utility model is described in detail.Following disclosure provides many different embodiments or example is used for realizing the utility model
Different structure.In order to simplify the disclosure of the utility model, hereinafter the component and setting of specific examples are described.This
Outside, the utility model can in different examples repeat reference numerals and/or letter.This repetition is in order to simplified and clear
Purpose, the relation between itself not indicating discussed various embodiments and/or setting.It is it should be noted that illustrated in the accompanying drawings
Component be not drawn necessarily to scale.The utility model eliminate description to known assemblies and treatment technology and process to avoid
It is unnecessarily limiting the utility model.
A kind of industrial USB provided below in conjunction with the accompanying drawings the utility model embodiment turns RS485 signal adapters
It is described in detail.
As shown in Figure 1, the utility model embodiment, which discloses a kind of industrial USB, turns RS485 signal adapters, including：
DC-DC power source circuit, USB turn TTL circuits, 485 turns of TTL circuits, signal isolation circuit, condition indication circuit and filtering voltage regulation electricity
Road.
As shown in Fig. 2, DC-DC power source circuit is made of NXPHI B0505S-1W modular power source chip U3 and peripheral circuit,
Capacitance C5, C7 that size is 22uF, one end connection ground terminal GNDi of capacitance C5, other end connection 5V power supplys are connected into U3
Input；One end connection ground terminal GND of capacitance C7, other end connection 5V power supply outputs；VIN connects power input, and foot 2 meets GNDi,
Foot 3 meets GND, and VOUT provides the output of 5V power supplys.
It is made of as shown in figure 3, USB turns TTL circuits FT232RL interface conversion chip U1 and peripheral circuit.Will decoupling electricity
Hold C1 one end connection GNDi, and be connected with the pin 18 of U1, the other end connects the pin 17 of U1；One end connection 5Vi of capacitance C2
Power input, and be connected with the pin 1 of the pin 20 of U1 and U2, the ground terminal GNDi of another termination power input；U1's draws
Foot 15 connects the pin 3 of U2；The pin 16 of U1 connects the pin 2 of U2；The pin 7 of U1, pin 18, pin 21, pin 25 and draw
Foot 26 connects the ground terminal GNDi of power input, its pin 4 and pin 20 connect 5Vi power inputs.
As shown in figure 4,485 turns of TTL circuits are made of SN65HVD3082 chips U5 and peripheral circuit, the pin 1 of U5 connects electricity
One end of R5 is hindered, pin 2 and pin 3 connect, and are connected with the pin 3 of chip U7, and pin 4 connects one end of resistance R8；Electricity
The ground terminal GND of one end connection power supply output of R7 is hindered, and is connected with the pin 5 of integrated package U5, its other end connection U5's draws
The positive terminal of foot 7 and TVS diode TVS2, and be connected with one end of self- recoverage insurance PTC2；One end connection 5V of resistance R4
Power supply exports, and is connected with the pin 8 of U5, the pin 6 of another termination U5 and the positive terminal of TVS diode TVS1, and with from extensive
One end of double insurance PTC1 is connected；TVS diode TVS1 is connected with the negative pole end of TVS2, and connects the ground connection of power supply output at the same time
Hold GND；The forward end " A+ " of the other end output difference signal of self- recoverage insurance PTC1, the other end of self- recoverage insurance PTC2 are defeated
Go out the backward end " B- " of differential signal.
As shown in figure 5, signal isolation circuit by two 6N137 chips U4, U6 and a TLP521-1 isolating chips U7 with
And peripheral circuit composition.The input terminal pin 3 of a termination U4 of resistance R5, the pin 1 of another termination U5；The pin 2 of U4 connects height
Level, pin 5 meet the ground terminal GNDi of power input；Resistance R3 one termination 5Vi power inputs, and with pin 7, the pin of U4
8 are connected, the collector pin 6 of another termination U4, and are connected with the pin 5 of chip U1；One end connection chip U1's of resistance R21
Pin 13, the pin 1 of other end connection chip U7；Resistance R22 one end connection power supply output ground terminal, other end connection chip U7
Pin 3 and chip U5 pin 2 and pin 3；The pin 4 of chip U7 connects the output of 5V power supplys, and pin 2 connects power input
Ground terminal；A termination 5Vi power inputs of resistance R10, and be connected with the pin 2 of U6, the pin 1 and resistance R9 of another termination U1
One end, the input terminal pin 3 of another termination U6 of R9；The ground terminal GND of the termination power output of capacitance C6, and and chip
The pin 5 of U6 is connected, and another termination 5V power supplys export, and one end of pin 7 with U6, pin 8 and resistance R8 is connected, and R8's is another
The pin 6 of one termination U6, and be connected with the pin 4 of U5.
Fig. 6 show condition indication circuit, one end connection 5Vi power inputs of resistance R2, other end sending and receiving optical diode
TX anodes, TX cathodes connect the pin 23 of U1；One end connection 5Vi power inputs of resistance R6, other end connection connection luminous two
Pole pipe RX anodes, RX cathodes connect the pin 22 of U1.
Fig. 7 show filter regulator circuit, and the cathode of capacitance C4 connects 5V power inputs, and with the phase of one end of capacitance C3
Even, the anode of C4 meets the ground terminal GND of power input, and is connected with the other end of capacitance C3.
In working status, the industrial USB turns the USB interface that RS485 signal adapters one terminate PC machine, the other end
Connect the RS485 interfaces of remote data equipment, after DC-DC power source starts power supply, by respective interface chip by RS485 signals or
Person's usb signal is converted to Transistor-Transistor Logic level.When not sending data, the level signal of FT232RL chips output is high level, DE/RE
For low level, RS485 receiving terminals allow, and status indicator lamp RX is lighted, and A, B end of SN65HVD3082 chips are in high-impedance state, this
When acted on by the pull-up of resistance R4, R7 and drop-down, make to produce positive differential signal in bus, so that the difference of high level be believed
Number send out, realize USB transmission data to RS485；When sending out data, the level signal of FT232RL chips output is low level,
DE/RE is high level, and RS485 transmitting terminals allow, and status indicator lamp TX is lighted, and A, B end of SN65HVD3082 chips are in low-resistance
State, represents low level differential signal so as to produce, realizes that RS485 transmits data to USB.
The utility model is carried out usb signal and RS485 signals mutual by being changed USB interface and RS485 interfaces
Mend and combine, so as to solve the problems, such as that industrial equipment is docked with the interface of computer, improve data transmission bauds and data can
By property, compensate for slow transmission speed, poor reliability, installation trouble and the deficiency of transmission range limitation, realize it is a kind of it is quick, can
Lean on, the remote data acquisition system of low cost.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (7)
1. a kind of industrial USB turns RS485 signal adapters, it is characterised in that including：DC-DC power source circuit, USB turn TTL electricity
Road, 485 turns of TTL circuits, signal isolation circuit, condition indication circuit and filter regulator circuit；
The USB turns TTL circuits and is located at USB ends, and 485 turns of TTL circuits are located at RS485 ends；
The signal isolation circuit turns TTL circuits with the USB respectively and 485 turns of TTL circuits are connected, and the USB turns TTL electricity
Road is also connected with the condition indication circuit；
The DC-DC power source circuit turns TTL circuits, 485 turns of TTL circuits, signal isolation circuit, state instruction electricity with USB respectively
Road is connected with filter regulator circuit.
2. a kind of industrial USB according to claim 1 turns RS485 signal adapters, it is characterised in that the DC-DC
Power circuit is made of NXPHI B0505S-1W modular power source chip U3 and peripheral circuit, and one end connection power supply of capacitance C5 is defeated
Enter ground terminal, other end connection 5V power inputs；One end connection power supply output ground terminal of capacitance C7, other end connection 5V power supplys
Output；The pin 1 of chip U3 connects 5V power inputs, and pin 2 connects power input ground terminal, and pin 3 connects power supply output ground terminal, draws
Foot 4 connects the output of 5V power supplys.
3. a kind of industrial USB according to claim 1 turns RS485 signal adapters, it is characterised in that the USB turns
TTL circuits are made of FT232RL interface conversion chip U1 and peripheral circuit；
Capacitance C1 one end connects power input ground terminal, and is connected with the pin 18 of chip U1, and other end connection chip U1's draws
Foot 17；One end connection 5V power inputs of capacitance C2, and be connected with the pin 1 of the pin 20 of chip U1 and USB_B interfaces U2,
Another termination power input ground terminal；The pin 15 of chip U1 connects the pin 3 of USB_B interfaces U2；The pin 16 of chip U1 connects
Connect the pin 2 of USB_B interfaces U2；Pin 7, pin 18, pin 21, pin 25 and the pin 26 of chip U1 connects power input and connects
Ground terminal, pin 4 and pin 20 connect 5V power inputs.
4. a kind of industrial USB according to claim 3 turns RS485 signal adapters, it is characterised in that described 485 turns
TTL circuits are made of SN65HVD3082 chips U5 and peripheral circuit；
The pin 2 and pin 3 of chip U5 connects；Resistance R7 one end connection power supply output ground terminal, and with the pin 5 of chip U5
It is connected, the pin 7 of resistance R7 other ends connection chip U5 and the positive terminal of TVS diode TVS2, and insure PTC2 with self- recoverage
One end be connected；One end connection 5V power supply outputs of resistance R4, and be connected with the pin 8 of chip U5, another chip termination U5
Pin 6 and TVS diode TVS1 positive terminal, and with self- recoverage insurance PTC1 one end be connected；TVS diode TVS1 and
The negative pole end of TVS diode TVS2 is connected, and connects power supply output ground terminal at the same time；The other end of self- recoverage insurance PTC1 passes through
Forward end A+ output difference signals, the other end of self- recoverage insurance PTC2 pass through backward end B- output difference signals.
5. a kind of industrial USB according to claim 4 turns RS485 signal adapters, it is characterised in that the signal every
It is made of from circuit a two 6N137 chips U4, U6 and TLP521-1 isolating chips U7 and peripheral circuit；
The input terminal pin 3 of a chip termination U4 of resistance R5, the pin 1 of another chip termination U5；The pin 2 of chip U4 connects height
Level, pin 5 connect power input ground terminal；A termination 5V power inputs of resistance R3, and pin 7 with chip U4,8 phase of pin
Even, the collector pin 6 of another chip termination U4, and be connected with the pin 5 of chip U1；One end connection chip U1 of resistance R21
Pin 13, the pin 1 of other end connection chip U7；Resistance R22 one end connection power supply output ground terminal, other end connection chip
The pin 3 of U7 and the pin 2 of chip U5 and pin 3；The pin 4 of chip U7 connects the output of 5V power supplys, and it is defeated that pin 2 connects power supply
Enter ground terminal；A termination 5V power inputs of resistance R10, and be connected with the pin 2 of chip U6, the pin of another chip termination U1
1 and one end of resistance R9, the input terminal pin 3 of another chip termination U6 of resistance R9；The termination power output of capacitance C6 connects
Ground terminal, and being connected with the pin 5 of chip U6, another termination 5V power supplys output, and with the pin 7, pin 8 and resistance R8 of chip U6
One end be connected, the pin 6 of another chip termination U6 of resistance R8, and being connected with the pin 4 of chip U5.
6. a kind of industrial USB according to claim 3 turns RS485 signal adapters, it is characterised in that the state refers to
Show that circuit is specially：
One end connection 5V power inputs of resistance R2, other end sending and receiving optical diode TX anodes, the connection of light emitting diode TX cathodes
The pin 23 of chip U1；One end connection 5V power inputs of resistance R6, other end connection connecting luminous diode RX anodes, shine
The pin 22 of diode RX cathodes connection chip U1.
7. a kind of industrial USB according to claim 1 turns RS485 signal adapters, it is characterised in that the filtering is steady
Volt circuit is specially：
The cathode of capacitance C4 connects 5V power inputs, and is connected with one end of capacitance C3, and the anode of capacitance C4 connects power input and connects
Ground terminal, and be connected with the other end of capacitance C3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721444562.0U CN207319228U (en) | 2017-11-02 | 2017-11-02 | A kind of industrial USB turns RS485 signal adapters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721444562.0U CN207319228U (en) | 2017-11-02 | 2017-11-02 | A kind of industrial USB turns RS485 signal adapters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207319228U true CN207319228U (en) | 2018-05-04 |
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ID=62380342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721444562.0U Expired - Fee Related CN207319228U (en) | 2017-11-02 | 2017-11-02 | A kind of industrial USB turns RS485 signal adapters |
Country Status (1)
| Country | Link |
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| CN (1) | CN207319228U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114866160A (en) * | 2022-05-27 | 2022-08-05 | 安徽南瑞中天电力电子有限公司 | Isolation protection circuit, module and chip of RS485 chip in acquisition terminal |
-
2017
- 2017-11-02 CN CN201721444562.0U patent/CN207319228U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114866160A (en) * | 2022-05-27 | 2022-08-05 | 安徽南瑞中天电力电子有限公司 | Isolation protection circuit, module and chip of RS485 chip in acquisition terminal |
| CN114866160B (en) * | 2022-05-27 | 2024-02-06 | 安徽南瑞中天电力电子有限公司 | Isolation protection circuit, module and chip of RS485 chip in acquisition terminal |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180504 Termination date: 20211102 |
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| CF01 | Termination of patent right due to non-payment of annual fee |