CN206850774U - A kind of translation interface of 485 turns of optical fiber - Google Patents
A kind of translation interface of 485 turns of optical fiber Download PDFInfo
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- CN206850774U CN206850774U CN201720834599.8U CN201720834599U CN206850774U CN 206850774 U CN206850774 U CN 206850774U CN 201720834599 U CN201720834599 U CN 201720834599U CN 206850774 U CN206850774 U CN 206850774U
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- rsm485pht
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- optical fiber
- resistor
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Abstract
It the utility model is related to a kind of translation interface of 485 turns of optical fiber, including optical fiber driving circuit, lightning prevention circuit and the RSM485PHT chips that optical fiber driving circuit and lightning prevention circuit link together, circuit is powered using 5V power supplys, pass through the isolation of optical fiber, so that RSM485PHT chips and the isolation with external electric signal, circuit highest supports 500kbps adaptive baud rate, transmission rate is fast, and the lightning prevention circuit being made up of transient voltage suppressor and resistance is set between RSM485PHT chips and external signal, electromagnetism strong antijamming capability, communication robust, baud rate self-adapting, it can effectively solve the problem that the problem of serial communication cisco unity malfunction or thunderbolt cause communication interface to damage under strong electromagnetic.
Description
Technical field
It the utility model is related to communication interface technology field, more particularly to a kind of translation interface of 485 turns of optical fiber.
Background technology
In daily life, due to light optical fiber conduction loss than electricity in the loss that electric wire conducts much lower, light
Fibre is used as the information transmission of long range.At present, industrial control is controlled at a distance using optical fiber more, and it is maximum special
Point is that transmission loss is low, not by electromagnetic interference；And with the development and extensive use of singlechip technology, enterprise is in instrument selection
One of necessary condition is sought to connected network communication interface, then 485 communications be again it is industrial through frequently with one kind lead to
News mode, but the limited transmission distance of 485 communications, for up to 1200 meters in theory, and in powerful electromagnetic interference environment,
Easily cause the mistake of data and lose, transmission rate do not reach, and the circuit of 485 turns of optical fiber of in general do not account for it is anti-
Problem of lightning, inconvenience is caused in user, even result in the damage of communication apparatus.
Utility model content
In view of the shortcomings of the prior art, a kind of translation interface of 485 turns of optical fiber is developed, can be in powerful electromagnetic interference ring
Communicate in border, such as thunderbolt environment and be not interfered, improve the stability of signal transmission.
To achieve these goals, the technical scheme of the utility model is：A kind of translation interface of 485 turns of optical fiber, including
Optical fiber driving circuit, lightning prevention circuit and the RSM485PHT chips that optical fiber driving circuit and lightning prevention circuit link together；
The optical fiber driving circuit includes optical fiber and sends joint HFBR1414TZ and optical fiber reception joint HFBR2412TZ,
Optical fiber sends joint HFBR1414TZ and is connected by triode Q1 with the pin of RSM485PHT chips the 4th, triode Q1 collector
It is connected by first resistor R1 with+5V power supplys, and optical fiber sends the pins of joint HFBR1414TZ the 7th, the 6th pin and second
Pin is both connected between triode Q1 collector and first resistor R1, triode Q1 base stage by second resistance R2 with
The pin of RSM485PHT chips the 4th is connected, and triode Q1 emitter-base bandgap grading and the pin of RSM485PHT chips the 3rd are grounded；Optical fiber connects
Receive the pins of joint HFBR2412TZ the 6th to be connected with the pin of RSM485PHT chips the 3rd, optical fiber reception joint HFBR2412TZ the
Two pins are connected with+5V power supplys, and the pin of RSM485PHT chips the 6th receives joint HFBR2412TZ second pins with optical fiber
Between be connected with the 5th resistance R5, the positive pole for the electrochemical capacitor CE of filtering is connected between the 5th resistance R5 and+5V power supplys,
Electrochemical capacitor CE negative pole ground connection, optical fiber receives the pins of joint HFBR2412TZ the 3rd and the 7th pin is grounded；
First pin connection+5V power supplys of RSM485PHT chips, the second pin ground connection of RSM485PHT chips；
The lightning prevention circuit by pull-up resistor Rup, pull down resistor Rdown, the first transient voltage suppressor TVS1,
Second transient voltage suppressor TVS2, the 3rd transient voltage suppressor TVS3,3rd resistor R3 and the 4th resistance R4
Form, the pin of RSM485PHT chips the 8th is connected through 3rd resistor R3 with signal input part A, the pin of RSM485PHT chips the 9th
It is connected through the 4th resistance R4 with signal input part B,
The pin of RSM485PHT chips the tenth is grounded, and the pin of RSM485PHT chips the 7th is connected to through pull-up resistor Rup
Between the pin of RSM485PHT chips the 9th and the 4th resistance R4, pull down resistor Rdown is connected to RSM485PHT chips the 8th and drawn
Between pin and 3rd resistor R3 and it is grounded, the second transient voltage suppressor TVS2 plus earth, negative pole is connected to
Between the pin of RSM485PHT chips the 8th and 3rd resistor R3, the 3rd transient voltage suppressor TVS3 plus earth, bear
Pole is connected between the pin of RSM485PHT chips the 9th and the 4th resistance R4, and the first transient voltage suppressor TVS1 is just
Pole is connected between the pin of RSM485PHT chips the 8th and 3rd resistor R3, and negative pole is connected to the pin of RSM485PHT chips the 9th
Between the 4th resistance R4.
As a kind of further improvement of the translation interface of 485 turns of optical fiber of the utility model, the resistance of the pull-up resistor Rup
It is worth for 150 Ω, pull down resistor Rdown resistance is 1K Ω.
Beneficial effect
A kind of translation interface of 485 turns of optical fiber of the utility model, circuit is powered using 5V power supplys, by the isolation of optical fiber,
So that RSM485PHT chips and the isolation with external electric signal, circuit highest supports 500kbps adaptive baud rate, passes
Defeated speed is fast, and sets between RSM485PHT chips and external signal and be made up of transient voltage suppressor and resistance
Lightning prevention circuit, electromagnetism strong antijamming capability, communication robust, baud rate self-adapting, can effectively solve the problem that in strong electromagnetic
The problem of lower serial communication cisco unity malfunction.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model；
In figure：1st, optical fiber driving circuit；2nd, lightning prevention circuit.
Embodiment
Further detailed description is carried out to the utility model below in conjunction with the accompanying drawings.
A kind of translation interface of 485 turns of optical fiber, including optical fiber driving circuit 1, lightning prevention circuit 2 and by optical fiber driving circuit
The 1 RSM485PHT chips to be linked together with lightning prevention circuit 2；
Optical fiber driving circuit includes optical fiber and sends joint HFBR1414TZ and optical fiber reception joint HFBR2412TZ, optical fiber
Send joint HFBR1414TZ to be connected with the pin of RSM485PHT chips the 4th by triode Q1, triode Q1 collector passes through
First resistor R1 is connected with+5V power supplys, and optical fiber sends the pins of joint HFBR1414TZ the 7th, the 6th pin and second pin
Be both connected between triode Q1 collector and first resistor R1, triode Q1 base stage by second resistance R2 with
The pin of RSM485PHT chips the 4th is connected, and triode Q1 emitter-base bandgap grading and the pin of RSM485PHT chips the 3rd are grounded；Optical fiber connects
Receive the pins of joint HFBR2412TZ the 6th to be connected with the pin of RSM485PHT chips the 3rd, optical fiber reception joint HFBR2412TZ the
Two pins are connected with+5V power supplys, and the pin of RSM485PHT chips the 6th receives joint HFBR2412TZ second pins with optical fiber
Between be connected with the 5th resistance R5, the positive pole for the electrochemical capacitor CE of filtering is connected between the 5th resistance R5 and+5V power supplys,
Electrochemical capacitor CE negative pole ground connection, optical fiber receives the pins of joint HFBR2412TZ the 3rd and the 7th pin is grounded；
First pin connection+5V power supplys of RSM485PHT chips, the second pin ground connection of RSM485PHT chips；
Lightning prevention circuit is by pull-up resistor Rup, pull down resistor Rdown, the first transient voltage suppressor TVS1, second
Transient voltage suppressor TVS2, the 3rd transient voltage suppressor TVS3,3rd resistor R3 and the 4th resistance R4 are formed,
The pin of RSM485PHT chips the 8th is connected through 3rd resistor R3 with signal input part A, and the pin of RSM485PHT chips the 9th is through
Four resistance R4 are connected with signal input part B,
The pin of RSM485PHT chips the tenth is grounded, and the pin of RSM485PHT chips the 7th is connected to through pull-up resistor Rup
Between the pin of RSM485PHT chips the 9th and the 4th resistance R4, pull down resistor Rdown is connected to RSM485PHT chips the 8th and drawn
Between pin and 3rd resistor R3 and it is grounded, the second transient voltage suppressor TVS2 plus earth, negative pole is connected to
Between the pin of RSM485PHT chips the 8th and 3rd resistor R3, the 3rd transient voltage suppressor TVS3 plus earth, bear
Pole is connected between the pin of RSM485PHT chips the 9th and the 4th resistance R4, and the first transient voltage suppressor TVS1 is just
Pole is connected between the pin of RSM485PHT chips the 8th and 3rd resistor R3, and negative pole is connected to the pin of RSM485PHT chips the 9th
Between the 4th resistance R4.
Wherein pull-up resistor Rup resistance is 150 Ω, and pull down resistor Rdown resistance is 1K Ω, by optical fiber every
From so that RSM485PHT chips and the isolation with external electric signal, circuit highest support 500kbps adaptive baud rate,
Transmission rate is fast, and lightning prevention circuit 2 is set between RSM485PHT chips and external signal, electromagnetism strong antijamming capability,
Communication robust, baud rate self-adapting, the problem of can effectively solve the problem that the serial communication cisco unity malfunction under strong electromagnetic.
It is described above, only it is preferred embodiment of the present utility model, not the utility model is made any formal
Limitation, although the utility model is disclosed above with preferred embodiment, but be not limited to the utility model, it is any ripe
Professional and technical personnel is known, is not being departed from the range of technical solutions of the utility model, when in the technology using the disclosure above
Hold the equivalent embodiment made a little change or be modified to equivalent variations, as long as being without departing from technical solutions of the utility model
Hold, any simple modification, equivalent change and modification made according to the technical essence of the utility model to above example, still
Belong in the range of technical solutions of the utility model.
Claims (2)
- A kind of 1. translation interface of 485 turns of optical fiber, it is characterised in that：Including optical fiber driving circuit（1）, lightning prevention circuit（2）With By optical fiber driving circuit（1）With lightning prevention circuit（2）The RSM485PHT chips to link together；The optical fiber driving circuit（1）Joint HFBR1414TZ is sent including optical fiber and optical fiber receives joint HFBR2412TZ, light Fibre sends joint HFBR1414TZ and is connected by triode Q1 with the pin of RSM485PHT chips the 4th, and triode Q1 collector is led to Cross first resistor R1 to be connected with+5V power supplys, and optical fiber sends the pins of joint HFBR1414TZ the 7th, the 6th pin and second draws Pin is both connected between triode Q1 collector and first resistor R1, triode Q1 base stage by second resistance R2 with The pin of RSM485PHT chips the 4th is connected, and triode Q1 emitter-base bandgap grading and the pin of RSM485PHT chips the 3rd are grounded；Optical fiber connects Receive the pins of joint HFBR2412TZ the 6th to be connected with the pin of RSM485PHT chips the 3rd, optical fiber reception joint HFBR2412TZ the Two pins are connected with+5V power supplys, and the pin of RSM485PHT chips the 6th receives joint HFBR2412TZ second pins with optical fiber Between be connected with the 5th resistance R5, the positive pole for the electrochemical capacitor CE of filtering is connected between the 5th resistance R5 and+5V power supplys, Electrochemical capacitor CE negative pole ground connection, optical fiber receives the pins of joint HFBR2412TZ the 3rd and the 7th pin is grounded； First pin connection+5V power supplys of RSM485PHT chips, the second pin ground connection of RSM485PHT chips；The lightning prevention circuit（2）By pull-up resistor Rup, pull down resistor Rdown, the first transient voltage suppressor TVS1, Second transient voltage suppressor TVS2, the 3rd transient voltage suppressor TVS3,3rd resistor R3 and the 4th resistance R4 Form, the pin of RSM485PHT chips the 8th is connected through 3rd resistor R3 with signal input part A, the pin of RSM485PHT chips the 9th It is connected through the 4th resistance R4 with signal input part B,The pin of RSM485PHT chips the tenth is grounded, and the pin of RSM485PHT chips the 7th is connected to through pull-up resistor Rup Between the pin of RSM485PHT chips the 9th and the 4th resistance R4, pull down resistor Rdown is connected to RSM485PHT chips the 8th and drawn Between pin and 3rd resistor R3 and it is grounded, the second transient voltage suppressor TVS2 plus earth, negative pole is connected to Between the pin of RSM485PHT chips the 8th and 3rd resistor R3, the 3rd transient voltage suppressor TVS3 plus earth, bear Pole is connected between the pin of RSM485PHT chips the 9th and the 4th resistance R4, and the first transient voltage suppressor TVS1 is just Pole is connected between the pin of RSM485PHT chips the 8th and 3rd resistor R3, and negative pole is connected to the pin of RSM485PHT chips the 9th Between the 4th resistance R4.
- A kind of 2. translation interface of 485 turns of optical fiber according to claim 1, it is characterised in that：The pull-up resistor Rup's Resistance is 150 Ω, and pull down resistor Rdown resistance is 1K Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720834599.8U CN206850774U (en) | 2017-07-11 | 2017-07-11 | A kind of translation interface of 485 turns of optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720834599.8U CN206850774U (en) | 2017-07-11 | 2017-07-11 | A kind of translation interface of 485 turns of optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206850774U true CN206850774U (en) | 2018-01-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720834599.8U Expired - Fee Related CN206850774U (en) | 2017-07-11 | 2017-07-11 | A kind of translation interface of 485 turns of optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206850774U (en) |
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2017
- 2017-07-11 CN CN201720834599.8U patent/CN206850774U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180105 Termination date: 20210711 |
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| CF01 | Termination of patent right due to non-payment of annual fee |