CN202565276U - Photoelectric converter of plastic optical fibers and RS485 communication port - Google Patents
Photoelectric converter of plastic optical fibers and RS485 communication port Download PDFInfo
- Publication number
- CN202565276U CN202565276U CN2012202127200U CN201220212720U CN202565276U CN 202565276 U CN202565276 U CN 202565276U CN 2012202127200 U CN2012202127200 U CN 2012202127200U CN 201220212720 U CN201220212720 U CN 201220212720U CN 202565276 U CN202565276 U CN 202565276U
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- plastic optical
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- plastic fiber
- circuit
- optical fibers
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Abstract
The utility model discloses a photoelectric converter of plastic optical fibers and an RS485 communication port. The photoelectric converter of the plastic optical fibers and the RS485 communication port comprises a plastic optical fiber port and an RS485 communication port, wherein the plastic optical fiber port comprises a receiving end, a transmitting end, an RS485 transmit-receive circuit and a power amplifier circuit, wherein the RS485 transmit-receive circuit is connected with the receiving end of the plastic optical fiber port, the power amplifier circuit is connected with the transmitting end of the plastic optical fiber port, and an input end of the power amplifier circuit is connected with the RS485 transmit-receive circuit. The converter of the plastic optical fibers and the RS485 communication port aims to convert optical signals of the plastic optical fibers and electric signals of a RS485 format, and has the advantages of strong anti-interference capacity, lighting strike resistance, long transmission distance, high speed rate, good stability, small size and convenient installation and the like. The photoelectric converter of the plastic optical fibers and the RS485 communication port is suitable for systems with strict requirements such as electric control, traffic control, industrial automation control, on-site manufacturing management and on-site monitoring control, and is a data converting and connecting device with a good cost-performance ratio and high reliability.
Description
Technical field
The utility model relates to a kind of optical-electrical converter, the optical-electrical converter that the signal of telecommunication of a kind of light signal and RS485 form to plastic fiber of more specifically saying so is changed each other.
Background technology
The maturation of singlechip technology grows up along with the beginning of the eighties, and the world is monopolized by intelligence instrument in instrument market basically now.Tracing it to its cause is exactly the needs of IT application in enterprises, and enterprise's one of them necessary condition when instrument selection will have the connected network communication interface exactly.Be data analog signal output simple procedure amount at first; Instrumentation tap was the RS232 interface afterwards, and this interface can be realized point-to-point communication mode, but this mode can not realize network savvy; RS-422 is by the RS-232 development, and it proposes for the deficiency that remedies RS-232.For improving the shortcoming that the RS-232 communication distance is short, speed is low; RS-422 has defined a kind of balanced communication interface; Transmission rate is brought up to 10Mb/s, and transmission range extends to 1200 meters (when speed is lower than 100kb/s), and allows on a balance bus, to connect maximum 10 receivers.RS-422 is unidirectional, the balance transmission standard that a kind of unit sends, multimachine receives, and is named as the TIA/EIA-422-A standard.Be the expanded application scope; EIA has formulated the RS-485 standard in nineteen eighty-three again on the RS-422 basis; Increase multiple spot, two-way communications capabilities, promptly allowed a plurality of transmitters to be connected on same the bus, increased the driving force and conflict protective feature of transmitter simultaneously; Expanded the bus common mode range, back called after TIA/EIA-485-A standard.
The most of work under bad environment of automation equipment, how the influence of receiving various electromagnetic interference simultaneously guarantees that the equipment long-term stability works reliably; Communication is a relatively more crucial problem; Existing a lot of equipment are realized communication with 485 bus modes, owing to being transmission medium with the cable, exist communication reliability not high; And having insoluble anti-thunderbolt problem, the thunderbolt loss rate is higher.Therefore, we need try every possible means to solve the reliability and the safety issue of the asynchronous data communication of automation equipment.
The utility model content
The purpose of the utility model is to overcome the defective of prior art, the optical-electrical converter that provides a kind of ability to change to the signal of telecommunication of the light signal of plastic fiber and RS485 form.
For realizing above-mentioned purpose, the utility model adopts following technical scheme:
The optical-electrical converter of a kind of plastic fiber and RS485 PORT COM; Comprise plastic fiber port and RS485 PORT COM; Described plastic fiber port comprises receiving terminal and transmitting terminal; Also comprise the RS485 transmission circuit that is connected with the receiving terminal of plastic fiber port, the driving amplifying circuit that is connected with the transmitting terminal of plastic fiber port, the input of said driving amplifying circuit is connected with the RS485 transmission circuit.
Its further technical scheme is: also comprise the power module and the indicator light circuit that are connected with the RS485 transmission circuit.
Its further technical scheme is: described RS485 transmission circuit comprises the SN65LBC184 cake core.
Its further technical scheme is: described driving amplifying circuit comprises the SN75451-1 cake core.
Its further technical scheme is: described power module comprises the LM2575S-5.0 cake core.
Its further technical scheme is: described plastic fiber port is more than two, also comprises the logical transition circuit between the receiving terminal of being located at the RS485 transmission circuit and driving amplifying circuit, plastic fiber port.
Its further technical scheme is: described logical transition circuit comprises the 74HC00-1 cake core.
The utility model beneficial effect compared with prior art is: the utility model can be changed to the light signal of plastic fiber and the signal of telecommunication of RS485 form, have antijamming capability strong, prevent characteristics such as thunderbolt, long transmission distance, speed height, good stability, volume be little, easy for installation.Being applicable in the strict system such as electric power control, traffic control, industrial automation control, in-situ production management, on-site supervision control, is the high data transaction connection device of a kind of cost performance superior in reliability.
Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.
Description of drawings
Fig. 1 is the circuit block diagram of the optical-electrical converter specific embodiment one of the utility model plastic fiber and RS485 PORT COM;
Fig. 2 is the circuit block diagram of the optical-electrical converter specific embodiment two of the utility model plastic fiber and RS485 PORT COM;
Fig. 3 is the circuit theory diagrams of the optical-electrical converter specific embodiment two of the utility model plastic fiber and RS485 PORT COM.
Description of reference numerals
1 plastic fiber port, 2 RS485 PORT COMs
11 receiving terminals, 12 transmitting terminals
3 RS485 transmission circuits 4 drive amplifying circuit
5 power modules, 6 indicator light circuits
7 logical transition circuit, 8 resistors match circuit
Embodiment
In order more to make much of the technology contents of the utility model, below in conjunction with specific embodiment the technical scheme of the utility model is further introduced and explanation, but be not limited to this.
As shown in Figure 1; The specific embodiment one of the optical-electrical converter of a kind of plastic fiber of the utility model and RS485 PORT COM; Comprise plastic fiber port one and RS485 PORT COM 2; The plastic fiber port one comprises receiving terminal 11 and transmitting terminal 12, also comprises the RS485 transmission circuit 3 that is connected with the receiving terminal 11 of plastic fiber port one, the driving amplifying circuit 4 that is connected with the transmitting terminal 12 of plastic fiber port one, and the input that drives amplifying circuit 4 is connected with RS485 transmission circuit 3.Also comprise the power module 5 and indicator light circuit 6 that are connected with RS485 transmission circuit 3.
As shown in Figures 2 and 3; The specific embodiment two of the optical-electrical converter of a kind of plastic fiber of the utility model and RS485 PORT COM; Plastic fiber port one wherein is two, also comprises the logical transition circuit 7 between the receiving terminal 11 of being located at RS485 transmission circuit 3 and driving amplifying circuit 4, plastic fiber port.In the present embodiment, the RS485 transmission circuit has adopted SN65LBC184 cake core (like the UB1 among Fig. 3); Drive amplifying circuit and adopted SN75451-1 cake core (like the UC2 among Fig. 3); Power module has adopted LM2575S-5.0 cake core (like the UD1 among Fig. 3); The logical transition circuit has adopted 74HC00-1 cake core (like the UC1 among Fig. 3); Indicator light circuit has adopted the 74hc14 cake core.In order to improve the adaptation ability of RS485; Also increased the resistors match circuit, when the electronic equipment that adopts RS485 form (or being referred to as the RS485 agreement), when not being provided with the resistance circuit that is connected with the RS485 port; Can pass through selector switch (like the SW1 among Fig. 3; Usually can adopt the form of toggle switch) connect the resistors match circuit, make the resistors match circuit that has additional in running order, and do not need other circuit of extra increase; When the electronic equipment that adopts RS485 form (or being referred to as the RS485 agreement) is provided with the resistance circuit that is connected with the RS485 port; Can pass through selector switch (, can adopt the form of toggle switch usually) off resistance match circuit, make the resistors match circuit that has additional be in non operating state like the SW1 among Fig. 3.
In other embodiment, the port of plastic fiber also can increase on demand, also can increase the number of chips and the number of chips that drives amplifying circuit of logical transition circuit.
Operation principle wherein is:
The light signal of two plastic fiber ports imports into from receiving terminal HFBR X5XXZ-R; Become the 74HC00-1 chip that the signal of telecommunication transfers to the logical transition circuit; Transfer to the SN65LBC184 chip of RS485 transmission circuit again, the signal of telecommunication that converts the RS485 form to is gone out through the RS485 port transmission;
The signal of telecommunication of RS485 form is through the SN65LBC184 chip of RS485 port transmission to RS485 transmission circuit; Through being sent to the 74HC00-1 chip of logical transition circuit after the conversion; Be resent to the SN75451-1 cake core that drives amplifying circuit; Its signal of telecommunication is carried out power amplification, and the signal of telecommunication after amplifying becomes light signal through transmitting terminal HFBR X5XXZ-T, launches through plastic fiber.In use, adopt the electronic equipment of RS485 form, all adopt such optical-electrical converter at its connection two ends, the middle plastic fiber that uses connects, and can prolong communication distance, and have very strong antijamming capability.
In sum, the utility model can be changed to the light signal of plastic fiber and the signal of telecommunication of RS485 form, have antijamming capability strong, prevent characteristics such as thunderbolt, long transmission distance, speed height, good stability, volume be little, easy for installation.Being applicable in the strict system such as electric power control, traffic control, industrial automation control, in-situ production management, on-site supervision control, is the high data transaction connection device of a kind of cost performance superior in reliability.
The above-mentioned technology contents that only further specifies the utility model with embodiment; So that the reader is more readily understood; But do not represent the execution mode of the utility model to only limit to this, any technology of doing according to the utility model is extended or recreation, all receives the protection of the utility model.The protection range of the utility model is as the criterion with claims.
Claims (7)
1. the optical-electrical converter of plastic fiber and RS485 PORT COM; Comprise plastic fiber port and RS485 PORT COM; Described plastic fiber port comprises receiving terminal and transmitting terminal; It is characterized in that also comprising the RS485 transmission circuit that is connected with the receiving terminal of plastic fiber port, the driving amplifying circuit that is connected with the transmitting terminal of plastic fiber port, the input of said driving amplifying circuit is connected with the RS485 transmission circuit.
2. the optical-electrical converter of plastic fiber according to claim 1 and RS485 PORT COM is characterized in that also comprising the power module and the indicator light circuit that are connected with the RS485 transmission circuit.
3. the optical-electrical converter of plastic fiber according to claim 2 and RS485 PORT COM is characterized in that described RS485 transmission circuit comprises the SN65LBC184 cake core.
4. the optical-electrical converter of plastic fiber according to claim 2 and RS485 PORT COM is characterized in that described driving amplifying circuit comprises the SN75451-1 cake core.
5. the optical-electrical converter of plastic fiber according to claim 2 and RS485 PORT COM is characterized in that described power module comprises the LM2575S-5.0 cake core.
6. the optical-electrical converter of plastic fiber according to claim 2 and RS485 PORT COM; It is characterized in that described plastic fiber port is more than two, also comprise the logical transition circuit between the receiving terminal of being located at the RS485 transmission circuit and driving amplifying circuit, plastic fiber port.
7. the optical-electrical converter of plastic fiber according to claim 6 and RS485 PORT COM is characterized in that described logical transition circuit comprises the 74HC00-1 cake core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202127200U CN202565276U (en) | 2012-05-11 | 2012-05-11 | Photoelectric converter of plastic optical fibers and RS485 communication port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202127200U CN202565276U (en) | 2012-05-11 | 2012-05-11 | Photoelectric converter of plastic optical fibers and RS485 communication port |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202565276U true CN202565276U (en) | 2012-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202127200U Expired - Fee Related CN202565276U (en) | 2012-05-11 | 2012-05-11 | Photoelectric converter of plastic optical fibers and RS485 communication port |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202565276U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104243036A (en) * | 2013-06-18 | 2014-12-24 | 深圳市中技源专利城有限公司 | Long-distance plastic optical fiber composite optical cable and communication method thereof |
| CN111245515A (en) * | 2020-01-10 | 2020-06-05 | 深圳市新威尔电子有限公司 | Device and method for signal long-distance transmission |
| CN111756435A (en) * | 2020-07-07 | 2020-10-09 | 中国科学院微小卫星创新研究院 | Power and signal transmission system |
| CN112383355A (en) * | 2020-11-11 | 2021-02-19 | 许继集团有限公司 | Novel RS485 changes optical fiber communication module |
-
2012
- 2012-05-11 CN CN2012202127200U patent/CN202565276U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104243036A (en) * | 2013-06-18 | 2014-12-24 | 深圳市中技源专利城有限公司 | Long-distance plastic optical fiber composite optical cable and communication method thereof |
| CN111245515A (en) * | 2020-01-10 | 2020-06-05 | 深圳市新威尔电子有限公司 | Device and method for signal long-distance transmission |
| CN111756435A (en) * | 2020-07-07 | 2020-10-09 | 中国科学院微小卫星创新研究院 | Power and signal transmission system |
| CN112383355A (en) * | 2020-11-11 | 2021-02-19 | 许继集团有限公司 | Novel RS485 changes optical fiber communication module |
| CN112383355B (en) * | 2020-11-11 | 2022-06-14 | 许继集团有限公司 | RS485 changes optical fiber communication module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen Huaying Century Photoelectric Technology Co., Ltd. Assignor: Wu Qi Contract record no.: 2012440020387 Denomination of utility model: Photoelectric converter of plastic optical fibers and RS485 communication port Granted publication date: 20121128 License type: Exclusive License Record date: 20121219 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| 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: 20121128 Termination date: 20180511 |