CN201956667U - Passive RS232 optoelectronic isolation lightning protection device - Google Patents
Passive RS232 optoelectronic isolation lightning protection device Download PDFInfo
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- CN201956667U CN201956667U CN2011200351781U CN201120035178U CN201956667U CN 201956667 U CN201956667 U CN 201956667U CN 2011200351781 U CN2011200351781 U CN 2011200351781U CN 201120035178 U CN201120035178 U CN 201120035178U CN 201956667 U CN201956667 U CN 201956667U
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- optoelectronic
- lightning protection
- protection device
- photoisolator
- serial port
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Abstract
The utility model discloses a passive RS232 optoelectronic isolation lightning protection device, which belongs to the field of the lightning protection device and comprises a sending end serial port RS232, a receiving end serial port RS232, a first optoelectronic isolator, a second optoelectronic isolator, a first power converter and a second power converter, wherein the sending end serial port RS232 and the receiving end serial port RS232 are respectively used for sending and receiving signals, the first optoelectronic isolator is used for isolating input signals, the second optoelectronic isolator is used for isolating sending signals, both ends of the first optoelectronic isolator and the second optoelectronic isolator are respectively connected with the sending end serial port RS232 and the receiving end serial port RS232, and the first power converter and the second power converter are used for respectively providing power supplies to the first optoelectronic isolator and the second optoelectronic isolator. A receiver receives transmitted signals, the signals passing through the optoelectronic isolators are transmitted to the sending end, and the goal of lightning protection is reached. A sending wire part and a receiving wire part of a sender and the receiver are respectively isolated by the optoelectronic isolators, so devices arranged at both ends of the lightning protection device are effectively prevented from being burnt by thunder and lightning or overvoltage. The passive RS232 optoelectronic isolation lightning protection device has the beneficial effects that the passive RS232 optoelectronic isolation lightning protection device can stably work at any speed rate without additional power supply electricity supplying, in addition, the structure is simple, and the installation is easy.
Description
Affiliated technical field
The utility model relates to a kind of lightning protection device, specifically is that a kind of passive RS232 photoelectricity is isolated lightning protection device.
Background technology
Many computers or instrument usually communicate by RS232, because communicating pair is in different current potentials, and both sides are active equipments, and the potential difference that charged wiring produces will be burnt computer or instrumentation, causes heavy losses.Numerous lightning protection devices all is an active equipment at present, perhaps has the restricted and unsettled shortcoming of traffic rate.
Summary of the invention
The utility model provides a kind of passive RS232 photoelectricity to isolate lightning protection device, and purpose is that to overcome existing lightning protection device must be restricted, the unsettled shortcoming of communicating by letter of active device, traffic rate.
The technical scheme in the invention for solving the technical problem is: a kind of passive RS232 photoelectricity is isolated lightning protection device, comprising: the transmitting terminal serial ports RS232 and the receiving terminal serial ports RS232 that are used for receiving and transmitting signal; Be used to isolate the photoisolator I of input signal and be used to isolate the photoisolator II that sends signal; The two ends of photoisolator I and photoisolator II are connected transmitting terminal serial ports RS232 and receiving terminal serial ports RS232 respectively; Also comprise and the power supply changeover device I and the power supply changeover device II of power supply are provided for respectively photoisolator I and photoisolator II.Power supply changeover device is used for+5V voltage transitions is-5V voltage, for photoisolator provides negative voltage.Photoisolator is used to isolate input signal and output signal, and the equipment at protection communication two ends is not damaged.The transceiver at two ends is used for the reception and the transmission of signal.
Operation principle is: receive and send signal by transceiver RS232, carry out voltage transitions by ICL7660, voltage after the conversion offers photoisolator, and the effect of photoisolator is that received signal is separated with sending signal, also is main lightning protection parts.The transmission line of transmitter and receiver and reception line all use photoisolator isolated respectively, thereby effectively prevent the components and parts at thunder and lightning or overvoltage damage lightning protection device two ends.
The beneficial effects of the utility model are: do not need additional power supply power supply just can be under any speed stable work.And simple in structure, be easy to install.
Description of drawings
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is a schematic diagram of the present utility model.
Among the figure: 1, receiving terminal serial ports RS232,2, the power supply changeover device I, 3, the photoisolator I, 4, the photoisolator II, 5, the power supply changeover device II, 6, transmitting terminal serial ports RS232.
Embodiment
As shown in Figure 1, receiving terminal serial ports RS232 1 receives data-signal, and signal sends to the transmitting terminal serial ports RS232 6 of signal by photoisolator I 3.Transmitting terminal serial ports RS232 6 received signals send to the receiving terminal serial ports RS232 1 of signal by photoisolator II 4, and wherein ICL7660 2 and ICL7660 5 are respectively photoisolator I 3 and 4 power supplies of photoisolator II for these.
Embodiment as shown in Figure 2, J1, J2 are receiving terminal serial ports RS232 1, the transmitting terminal serial ports RS232 6 among Fig. 1.The signal transmitting and receiving device of RS232 is connected with external equipment, and G1 is the power supply changeover device I 2 among Fig. 1, and G2 is a power supply changeover device II 5, and G1 and G2 all adopt small-power polarity inversion power supply changeover device ICL7660.1. the pin of G1 provides+the 5V power supply, and 5. pin provides-the 5V power supply; Photoisolator I 3 comprises N1 and N2, and power supply chip is G1.Photoisolator II 4 comprises N3 and N4 among Fig. 1, and power supply chip is G2.The pin DTR of RS232 4., 8. CTS be constant+12V voltage, and by can be used as the positive supply of photoisolator N1 after diode D1, D2 and the resistance R 1, voltage swing is+5V.Simultaneously+pin that the power supply of 5V is connected to ICL7660 (G1) 8., can obtain-voltage of 5V by voltage transitions, 5. chip pin export-voltage of 5V, is connected to N2 negative supply is provided.When 3. input signal connects photoisolator N1 through resistance R 5 by the pin of RS232 (J2), the opto-electronic conversion output by N1 is connected to the pin of RS232 (J1) and 2. goes up.In like manner, when 3. input signal connects photoisolator N3 through resistance R 2 by the pin of RS232 (J1), the opto-electronic conversion output by N3 is connected to the pin of RS232 (J2) and 2. goes up.8. the pin of ICL7660 (G2) provides+5V voltage for photoisolator N3, and 5. pin is exported-5V power voltage supply photoisolator N4.All be that the pin correspondence directly is connected between N1 and N2, N3 and the N4.
Claims (2)
1. a passive RS232 photoelectricity is isolated lightning protection device, it is characterized in that, comprising: the receiving terminal serial ports RS232 (1) and the transmitting terminal serial ports RS232 (6) that are used for received signal; Be used to isolate the photoisolator I (3) that sends signal and be used to isolate the photoisolator II (4) of received signal; The two ends of photoisolator I (3) and photoisolator II (4) are connected receiving terminal serial ports RS232 (1) and transmitting terminal serial ports RS232 (6) respectively; Also comprise and the power supply changeover device I (2) and the power supply changeover device II (5) of power supply are provided for respectively photoisolator I (3) and photoisolator II (4).
2. passive RS232 photoelectricity according to claim 1 is isolated lightning protection device, it is characterized in that described power supply changeover device I (2) and power supply changeover device II (5) all adopt small-power polarity inversion power supply changeover device ICL7660.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200351781U CN201956667U (en) | 2011-01-27 | 2011-01-27 | Passive RS232 optoelectronic isolation lightning protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200351781U CN201956667U (en) | 2011-01-27 | 2011-01-27 | Passive RS232 optoelectronic isolation lightning protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201956667U true CN201956667U (en) | 2011-08-31 |
Family
ID=44500769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200351781U Expired - Fee Related CN201956667U (en) | 2011-01-27 | 2011-01-27 | Passive RS232 optoelectronic isolation lightning protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201956667U (en) |
-
2011
- 2011-01-27 CN CN2011200351781U patent/CN201956667U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20110831 Termination date: 20170127 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |