CN204229396U - Portable USB turns 485 electronic equipment interfaces modules - Google Patents
Portable USB turns 485 electronic equipment interfaces modules Download PDFInfo
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- CN204229396U CN204229396U CN201420686240.7U CN201420686240U CN204229396U CN 204229396 U CN204229396 U CN 204229396U CN 201420686240 U CN201420686240 U CN 201420686240U CN 204229396 U CN204229396 U CN 204229396U
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Abstract
The utility model discloses a kind of Portable USB and turn 485 electronic equipment interfaces modules, aim to provide a kind of interface module connecting electronic equipment and android equipment.It comprises USB interface, change-over circuit, buffer circuit, RS485 interface, indicator light circuit and the power circuit for whole module for power supply, described change-over circuit connects usb circuit, buffer circuit and indicator light circuit respectively, and described buffer circuit also connects RS485 interface.By this equipment can connect with RS485 interface electronic equipment and support the Android device (mobile phone or flat board) of OTG, workmen completes the debugging to electronic equipment by Android device.Without the need to finding suitable support level for commissioning device, reduce debugging difficulty.This programme is applicable to the electronic equipment debugging of working-yard and safeguards.
Description
Technical field
The utility model relates to electronic equipment debugging field, especially relates to a kind of Portable USB and turns 485 electronic equipment interfaces modules.
Background technology
After electronic product installs or maintenance and repair time often need to be connected debug process with computing machine.When current site operation personnel debug, be generally hold notebook, need to find a place that can support, notebook is put well, then connect upper USB and turn 485 modules, just can work.Have the high-level occasion of very large inconvenience, particularly electronic equipment like this, notebook is more difficult suitable riding position, and workmen is difficult to operation.
Mobile phone and the tablet device of present use Android system are very universal, if adopt mobile phone or flat board to debug, then equipment can be held on hand by workmen easily, support level need not be found specially, and the USB port that existing converting interface is mostly PC end turns RS485 interface, do not support android equipment.
State Intellectual Property Office of the People's Republic of China disclosed on 06 04th, 2014 the patent documentation that notification number is CN203630781U, title is the converter that USB turns RS485 interface, comprises USB joint, RS485 interface and connects the signal connecting line of USB joint and RS485 interface; Described USB joint comprises USB interface, USB turns Transistor-Transistor Logic level module and Transistor-Transistor Logic level turns RS485 module, and the input end that described USB turns Transistor-Transistor Logic level module is electrically connected with USB interface; The output terminal that described USB turns Transistor-Transistor Logic level module is electrically connected with the input end that Transistor-Transistor Logic level turns RS485 module, and described Transistor-Transistor Logic level is turned RS485 module and is electrically connected with RS485 interface by signal connecting line.The coupling of the communication facilities with notebook computer with RS485 interface can be connected by this scheme, but cannot by RS485 equipment and android equipment connection.
Summary of the invention
The utility model mainly solves the technical matters of field adjustable necessary notebook, complex operation etc. existing for prior art, provides the Portable USB of a kind of RS485 of connection equipment and android equipment to turn 485 electronic equipment interfaces modules.
The utility model is mainly solved by following technical proposals for above-mentioned technical matters: a kind of Portable USB turns 485 electronic equipment interfaces modules, comprise USB interface, change-over circuit, buffer circuit, RS485 interface, indicator light circuit and the power circuit for whole module for power supply, described change-over circuit connects usb circuit, buffer circuit and indicator light circuit respectively, and described buffer circuit also connects RS485 interface; Described change-over circuit comprises FT231X chip, resistance R4, resistance R7, resistance R8, electric capacity C5, electric capacity C10 and diode D4; One end of described resistance R7 connects the DM pin of USB interface, and the other end connects 12 pin of FT231X chip; One end of resistance R8 connects the DP pin of USB interface, and the other end connects 11 pin of FT231X chip; One end of electric capacity C5 connects 15 pin of FT231X chip, other end ground connection; Electric capacity C10 is connected across between 14 pin of FT231X chip and 6 pin; One end of resistance R4 connects 4 pin of FT231X chip, and the other end connects power supply+3.3V; The positive pole of diode D4 connects 4 pin of FT231X chip, and negative pole connects buffer circuit; 10 pin of FT231X chip are connected buffer circuit with 20 pin, and 17 pin are connected indicator light circuit with 18 pin.
By this equipment can connect with RS485 interface electronic equipment and support the Android device (mobile phone or flat board) of OTG, workmen completes the debugging to electronic equipment by Android device.FT231 chip completes the mutual conversion of usb signal and RS485 signal.
As preferably, described buffer circuit comprises isolating chip, electric capacity C6, electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C12, resistance R5, resistance R6, thermistor PTC1, thermistor PTC2, diode D1, diode D2, diode D3 and connection terminal JK1; Described isolating chip is ADM2587E; 3 pin of described isolating chip connect power supply+3.3V, and electric capacity C6 one end connects 3 pin of isolating chip, other end ground connection, and electric capacity C7 is in parallel with electric capacity C6; Electric capacity C8 is connected across between 12 pin of isolating chip and 11 pin, and electric capacity C12, electric capacity C9 are in parallel with electric capacity C8; 20 pin of isolating chip, 16 pin, 14 pin are connected with 11 pin, and 19 pin of isolating chip are connected with 12 pin; 4 pin of isolating chip connect the negative pole of diode D4; 7 pin of isolating chip connect 20 pin of FT231X chip; 5 pin of isolating chip are connected 10 pin of FT231X chip with 6 pin; 18 pin of isolating chip connect the first end of thermistor PTC1, and second end of thermistor PTC1 connects connection terminal JK1; 17 pin of isolating chip connect the first end of thermistor PTC2, and second end of thermistor PTC2 connects connection terminal JK1; One end of resistance R5 connects isolating chip 18 pin, and the other end connects isolating chip 12 pin; Resistance R6 is connected across between 17 pin of isolating chip and 11 pin; Diode D1, diode D2 and diode D3 are Transient Suppression Diode; The positive pole of diode D1 connects isolating chip 11 pin, and negative pole connects the first end of thermistor PTC1; The positive pole of diode D3 connects isolating chip 11 pin, and negative pole connects the first end of thermistor PTC2; The negative pole of the cathode connecting diode D1 of diode D2, the negative pole of diode D2 connects the negative pole of diode D3; 17 pin of isolating chip are connected RS485 interface with 18 pin.
ADM2587E chip has the message transmission rate higher than photoelectrical coupler, time sequence precision and transient state common mode inhibition capacity, and eliminates the current delivery rate of photoelectric coupling instability, nonlinear transport, temperature and serviceable life etc. aspect problem.11 pin of isolating chip are the ground wire of RS485 part.
As preferably, described RS485 interface comprises resistance R11 and connection terminal JK2, and 2 pin of described connection terminal JK2 connect 18 pin of isolating chip by resistance R11,1 pin of connection terminal JK2 connects 17 pin of isolating chip.
Resistance R11 makes RS485 interface can mount more equipment, also extends transmission range.
As preferably, described usb circuit comprises connection terminal J1 and fuse F1, and the first end of described fuse F1 connects the VCC pin of connection terminal J1, and the second end connects power circuit.
Fuse provides over-current over-voltage protection for module.
As preferably, described power circuit comprises LD1117 chip, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, resistance R1 and LED 1; 3 pin of LD1117 chip connect second end of fuse F1,1 pin ground connection; Electric capacity C2 is connected across between 1 pin of LD1117 chip and 3 pin, and electric capacity C3 is in parallel with electric capacity C2; Electric capacity C1 is connected across between 1 pin of LD1117 chip and 2 pin, and electric capacity C4 is in parallel with electric capacity C1; The first end of resistance R1 connects 2 pin of LD1117 chip, the positive pole of the second end connecting luminous diode LED1; The minus earth of LED 1.
Power supply provides+3.3V voltage for whole module, and 1 pin of LD1117 chip connects the GND pin of connection terminal J1, as the ground wire of USB part.
As preferably, indicator light circuit comprises LED 2, LED 3, resistance R2 and resistance R3; The negative pole of described LED 2 connects 18 pin of FT231X chip, and positive pole connects power supply+3.3V by resistance R2; The negative pole of described LED 3 connects 17 pin of FT231X chip, and positive pole connects power supply+3.3V by resistance R3.
When there being data transmit-receive, light emitting diode can glimmer, and constructability personnel understand state.
This programme is also applicable to the connection of computing machine and electronic equipment.
The beneficial effect that the utility model brings is, support android equipment, do not need to look for support level, reduce debugging difficulty, band Magnetic isolation, guarantee the degree of purity of signal, be with 120 ohm termination resistance, more equipment can be driven, support the interconnection network of various RS485, make debug process more convenient easy, volume is little, is easy to carry.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present utility model;
Fig. 2 is a kind of change-over circuit figure of the present utility model;
Fig. 3 is a kind of usb circuit figure of the present utility model;
Fig. 4 is a kind of buffer circuit figure of the present utility model;
Fig. 5 is a kind of RS485 interface circuit figure of the present utility model;
Fig. 6 is a kind of indicator light circuit figure of the present utility model;
Fig. 7 is a kind of power circuit diagram of the present utility model;
In figure: 1, USB interface, 2, change-over circuit, 3, buffer circuit, 4, RS485 interface, 5, indicator light circuit, 6, power circuit.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: a kind of Portable USB of the present embodiment turns 485 electronic equipment interfaces modules, as shown in Figure 1, comprise usb 1, change-over circuit 2, buffer circuit 3, RS485 interface 4, indicator light circuit 5 and the power circuit 6 for whole module for power supply, change-over circuit connects usb circuit, buffer circuit and indicator light circuit respectively, and buffer circuit also connects RS485 interface.
As shown in Figure 2, change-over circuit comprises FT231X chip, resistance R4, resistance R7, resistance R8, electric capacity C5, electric capacity C10 and diode D4; One end of described resistance R7 connects the DM pin of USB interface, and the other end connects 12 pin of FT231X chip; One end of resistance R8 connects the DP pin of USB interface, and the other end connects 11 pin of FT231X chip; One end of electric capacity C5 connects 15 pin of FT231X chip, other end ground connection; Electric capacity C10 is connected across between 14 pin of FT231X chip and 6 pin; One end of resistance R4 connects 4 pin of FT231X chip, and the other end connects power supply+3.3V; The positive pole of diode D4 connects 4 pin of FT231X chip, and negative pole connects buffer circuit; 10 pin of FT231X chip are connected buffer circuit with 20 pin, and 17 pin are connected indicator light circuit with 18 pin.
As shown in Figure 4, buffer circuit comprises isolating chip, electric capacity C6, electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C12, resistance R5, resistance R6, thermistor PTC1, thermistor PTC2, diode D1, diode D2, diode D3 and connection terminal JK1; Described isolating chip is ADM2587E; 3 pin of described isolating chip connect power supply+3.3V, and electric capacity C6 one end connects 3 pin of isolating chip, other end ground connection, and electric capacity C7 is in parallel with electric capacity C6; Electric capacity C8 is connected across between 12 pin of isolating chip and 11 pin, and electric capacity C12, electric capacity C9 are in parallel with electric capacity C8; 20 pin of isolating chip, 16 pin, 14 pin are connected with 11 pin, and 19 pin of isolating chip are connected with 12 pin; 4 pin of isolating chip connect the negative pole of diode D4; 7 pin of isolating chip connect 20 pin of FT231X chip; 5 pin of isolating chip are connected 10 pin of FT231X chip with 6 pin; 18 pin of isolating chip connect the first end of thermistor PTC1, and second end of thermistor PTC1 connects connection terminal JK1; 17 pin of isolating chip connect the first end of thermistor PTC2, and second end of thermistor PTC2 connects connection terminal JK1; One end of resistance R5 connects isolating chip 18 pin, and the other end connects isolating chip 12 pin; Resistance R6 is connected across between 17 pin of isolating chip and 11 pin; Diode D1, diode D2 and diode D3 are Transient Suppression Diode; The positive pole of diode D1 connects isolating chip 11 pin, and negative pole connects the first end of thermistor PTC1; The positive pole of diode D3 connects isolating chip 11 pin, and negative pole connects the first end of thermistor PTC2; The negative pole of the cathode connecting diode D1 of diode D2, the negative pole of diode D2 connects the negative pole of diode D3; 17 pin of isolating chip are connected RS485 interface with 18 pin.
11 pin of isolating chip are the ground wire of RS485 part.
As shown in Figure 5, RS485 interface comprises resistance R11 and connection terminal JK2, and 2 pin of described connection terminal JK2 connect 18 pin of isolating chip by resistance R11,1 pin of connection terminal JK2 connects 17 pin of isolating chip.Resistance R11 makes RS485 interface can mount more equipment, also extends transmission range.
As shown in Figure 3, usb circuit comprises connection terminal J1 and fuse F1, and the first end of described fuse F1 connects the VCC pin of connection terminal J1, and the second end connects power circuit.
Fuse provides over-current over-voltage protection for module.
As shown in Figure 7, power circuit comprises LD1117 chip, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, resistance R1 and LED 1; 3 pin of LD1117 chip connect second end of fuse F1,1 pin ground connection; Electric capacity C2 is connected across between 1 pin of LD1117 chip and 3 pin, and electric capacity C3 is in parallel with electric capacity C2; Electric capacity C1 is connected across between 1 pin of LD1117 chip and 2 pin, and electric capacity C4 is in parallel with electric capacity C1; The first end of resistance R1 connects 2 pin of LD1117 chip, the positive pole of the second end connecting luminous diode LED1; The minus earth of LED 1.Power supply provides+3.3V voltage for whole module, and 1 pin of LD1117 chip connects the GND pin of connection terminal J1, as the ground wire of USB part.LED 1 Chang Liang during energising.
As shown in Figure 6, indicator light circuit comprises LED 2, LED 3, resistance R2 and resistance R3; The negative pole of described LED 2 connects 18 pin of FT231X chip, and positive pole connects power supply+3.3V by resistance R2; The negative pole of described LED 3 connects 17 pin of FT231X chip, and positive pole connects power supply+3.3V by resistance R3.When there being data transmit-receive, LED 2 and LED3 can glimmer.
This module not only supports that pc holds, and more supports Andriod equipment, and without the need to root authority, only need the USB of android mobile phone to support OTG function, installing corresponding app can connect debugging.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Although more employ the terms such as isolating chip, change-over circuit, terminal resistance herein, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present utility model more easily; The restriction that they are construed to any one additional is all contrary with the utility model spirit.
Claims (6)
1. a Portable USB turns 485 electronic equipment interfaces modules, it is characterized in that, comprise USB interface, change-over circuit, buffer circuit, RS485 interface, indicator light circuit and the power circuit for whole module for power supply, described change-over circuit connects usb circuit, buffer circuit and indicator light circuit respectively, and described buffer circuit also connects RS485 interface; Described change-over circuit comprises FT231X chip, resistance R4, resistance R7, resistance R8, electric capacity C5, electric capacity C10 and diode D4; One end of described resistance R7 connects the DM pin of USB interface, and the other end connects 12 pin of FT231X chip; One end of resistance R8 connects the DP pin of USB interface, and the other end connects 11 pin of FT231X chip; One end of electric capacity C5 connects 15 pin of FT231X chip, other end ground connection; Electric capacity C10 is connected across between 14 pin of FT231X chip and 6 pin; One end of resistance R4 connects 4 pin of FT231X chip, and the other end connects power supply+3.3V; The positive pole of diode D4 connects 4 pin of FT231X chip, and negative pole connects buffer circuit; 10 pin of FT231X chip are connected buffer circuit with 20 pin, and 17 pin are connected indicator light circuit with 18 pin.
2. Portable USB according to claim 1 turns 485 electronic equipment interfaces modules, it is characterized in that, described buffer circuit comprises isolating chip, electric capacity C6, electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C12, resistance R5, resistance R6, thermistor PTC1, thermistor PTC2, diode D1, diode D2, diode D3 and connection terminal JK1; Described isolating chip is ADM2587E; 3 pin of described isolating chip connect power supply+3.3V, and electric capacity C6 one end connects 3 pin of isolating chip, other end ground connection, and electric capacity C7 is in parallel with electric capacity C6; Electric capacity C8 is connected across between 12 pin of isolating chip and 11 pin, and electric capacity C12, electric capacity C9 are in parallel with electric capacity C8; 20 pin of isolating chip, 16 pin, 14 pin are connected with 11 pin, and 19 pin of isolating chip are connected with 12 pin; 4 pin of isolating chip connect the negative pole of diode D4; 7 pin of isolating chip connect 20 pin of FT231X chip; 5 pin of isolating chip are connected 10 pin of FT231X chip with 6 pin; 18 pin of isolating chip connect the first end of thermistor PTC1, and second end of thermistor PTC1 connects connection terminal JK1; 17 pin of isolating chip connect the first end of thermistor PTC2, and second end of thermistor PTC2 connects connection terminal JK1; One end of resistance R5 connects isolating chip 18 pin, and the other end connects isolating chip 12 pin; Resistance R6 is connected across between 17 pin of isolating chip and 11 pin; Diode D1, diode D2 and diode D3 are Transient Suppression Diode; The positive pole of diode D1 connects isolating chip 11 pin, and negative pole connects the first end of thermistor PTC1; The positive pole of diode D3 connects isolating chip 11 pin, and negative pole connects the first end of thermistor PTC2; The negative pole of the cathode connecting diode D1 of diode D2, the negative pole of diode D2 connects the negative pole of diode D3; 17 pin of isolating chip are connected RS485 interface with 18 pin.
3. Portable USB according to claim 2 turns 485 electronic equipment interfaces modules, it is characterized in that, described RS485 interface comprises resistance R11 and connection terminal JK2,2 pin of described connection terminal JK2 connect 18 pin of isolating chip by resistance R11,1 pin of connection terminal JK2 connects 17 pin of isolating chip.
4. the Portable USB according to claim 1 or 2 or 3 turns 485 electronic equipment interfaces modules, it is characterized in that, described usb circuit comprises connection terminal J1 and fuse F1, and the first end of described fuse F1 connects the VCC pin of connection terminal J1, and the second end connects power circuit.
5. Portable USB according to claim 4 turns 485 electronic equipment interfaces modules, it is characterized in that, described power circuit comprises LD1117 chip, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, resistance R1 and LED 1; 3 pin of LD1117 chip connect second end of fuse F1,1 pin ground connection; Electric capacity C2 is connected across between 1 pin of LD1117 chip and 3 pin, and electric capacity C3 is in parallel with electric capacity C2; Electric capacity C1 is connected across between 1 pin of LD1117 chip and 2 pin, and electric capacity C4 is in parallel with electric capacity C1; The first end of resistance R1 connects 2 pin of LD1117 chip, the positive pole of the second end connecting luminous diode LED1; The minus earth of LED 1.
6. the Portable USB according to claim 1 or 2 or 3 turns 485 electronic equipment interfaces modules, it is characterized in that, indicator light circuit comprises LED 2, LED 3, resistance R2 and resistance R3; The negative pole of described LED 2 connects 18 pin of FT231X chip, and positive pole connects power supply+3.3V by resistance R2; The negative pole of described LED 3 connects 17 pin of FT231X chip, and positive pole connects power supply+3.3V by resistance R3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420686240.7U CN204229396U (en) | 2014-11-17 | 2014-11-17 | Portable USB turns 485 electronic equipment interfaces modules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420686240.7U CN204229396U (en) | 2014-11-17 | 2014-11-17 | Portable USB turns 485 electronic equipment interfaces modules |
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| Publication Number | Publication Date |
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| CN204229396U true CN204229396U (en) | 2015-03-25 |
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| CN201420686240.7U Expired - Fee Related CN204229396U (en) | 2014-11-17 | 2014-11-17 | Portable USB turns 485 electronic equipment interfaces modules |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107797952A (en) * | 2017-09-28 | 2018-03-13 | 广州博厚医疗技术有限公司 | The USB circuit and rehabilitation system of rehabilitation system |
-
2014
- 2014-11-17 CN CN201420686240.7U patent/CN204229396U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107797952A (en) * | 2017-09-28 | 2018-03-13 | 广州博厚医疗技术有限公司 | The USB circuit and rehabilitation system of rehabilitation system |
| CN107797952B (en) * | 2017-09-28 | 2019-09-13 | 广州博厚医疗技术有限公司 | The USB circuit and rehabilitation system of rehabilitation system |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20150325 Termination date: 20151117 |
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| EXPY | Termination of patent right or utility model |