CN210225388U - Photoelectric isolation module compatible with NPN and PNP type sensors - Google Patents
Photoelectric isolation module compatible with NPN and PNP type sensors Download PDFInfo
- Publication number
- CN210225388U CN210225388U CN201921613918.8U CN201921613918U CN210225388U CN 210225388 U CN210225388 U CN 210225388U CN 201921613918 U CN201921613918 U CN 201921613918U CN 210225388 U CN210225388 U CN 210225388U
- Authority
- CN
- China
- Prior art keywords
- power supply
- supply voltage
- over switch
- npn
- change
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)
Abstract
The utility model discloses a photoelectric isolation module of compatible NPN and PNP type sensor access, include: an opto-electrically isolated chip, comprising: a light emitting diode and a photo transistor; two ends of the light emitting diode are respectively connected with 12V power supply voltage and 0V power supply voltage, and two ends of the phototriode are respectively connected with 24V power supply voltage and 0V power supply voltage; have set gradually resistance R1 and change over switch K1 between emitting diode and the 12V mains voltage, be provided with change over switch K2 between emitting diode and the 0V mains voltage, have set gradually resistance R2 and change over switch K3 between phototriode and the 24V mains voltage, be provided with change over switch K4 between phototriode and the 0V mains voltage, adopt the utility model discloses a photoelectric isolation module, it can realize PNP, the compatible access and the output of two kinds of sensor signal of NPN to the adaptation NPN, two kinds of sensor type of PNP and PLC digital quantity input type, signal compatibility is good, transmission effect is good.
Description
Technical Field
The utility model relates to a photoelectric isolation module. More specifically, the utility model relates to a photoelectric isolation module that compatible NPN and PNP type sensor inserts.
Background
A photo coupler (optical coupler, abbreviated as OC in english) is also called a photo isolator, which is abbreviated as a photo coupler. The photocoupler transmits an electric signal using light as a medium. It has good isolation function to input and output electric signals, so it is widely used in various circuits. At present, the photoelectric device becomes one of the most various photoelectric devices with the most application. An optical coupler generally consists of three parts: light emission, light reception and signal amplification. The input electrical signal drives a Light Emitting Diode (LED) to emit light with a certain wavelength, the light emitting diode is received by a light detector to generate a photocurrent, and the photocurrent is further amplified and then output. This completes the electro-optic-electric conversion, thereby playing the role of input, output and isolation. Because the input and the output of the optical coupler are isolated from each other, the electric signal transmission has the characteristics of unidirectionality and the like, thereby having good electric insulation capability and anti-interference capability.
The sensors need to be accessed in the automatic control system, and most of the sensors need to be accessed into a PLC digital quantity input module after photoelectric isolation from the viewpoint of system reliability. In practical application, an engineer needs to design a hardware circuit to be matched according to the type of the sensor and the type of the digital input module of the PLC, once the types of the sensor and the digital input module of the PLC are inconsistent with the design in application, the hardware circuit needs to be modified on site, problems are easy to occur, and engineering efficiency and quality are influenced.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages which will be described later.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided an optoelectronic isolation module compatible with NPN and PNP sensor access, comprising:
an opto-electrically isolated chip, comprising: a light emitting diode and a photo transistor;
two ends of the light emitting diode are respectively connected with 12V power supply voltage and 0V power supply voltage, and two ends of the phototriode are respectively connected with 24V power supply voltage and 0V power supply voltage;
a resistor R1 and a change-over switch K1 are sequentially arranged between the light-emitting diode and the 12V power supply voltage, a change-over switch K2 is arranged between the light-emitting diode and the 0V power supply voltage, a resistor R2 and a change-over switch K3 are sequentially arranged between the phototriode and the 24V power supply voltage, and a change-over switch K4 is arranged between the phototriode and the 0V power supply voltage;
an Input port is further arranged between the change-over switch K1 and the change-over switch K2, and an Output port is further arranged between the change-over switch K3 and the change-over switch K4;
the three contact pins of the switch K1 are respectively set to a, b and c, the three contact pins of the switch K2 are respectively set to d, e and f, the three contact pins of the switch K3 are respectively set to g, h and i, and the three contact pins of the switch K4 are respectively set to j, K and l.
Preferably, the resistance value of the resistor R1 is set to 3000 ohms.
Preferably, the resistance value of the resistor R2 is set to 5000 ohms.
Preferably, the model of the optoelectronic isolation chip is set to be TPL 521-2.
The utility model discloses at least, include following beneficial effect: the four change-over switches K1, K2, K3 and K4 are additionally arranged in the traditional photoelectric isolation module, and the compatible access of signals of the PNP and NPN sensors and the output of signals of the PNP and NPN modes are realized by only using one photoelectric isolation chip in a jumper switching mode, so that the PNP and NPN sensor types and the PLC digital input type are adapted, the signal compatibility is good, and the transmission effect is good.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 shows a circuit diagram of an optoelectronic isolation module compatible with NPN and PNP sensor access.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Fig. 1 shows an implementation form of a photoelectric isolation module compatible with NPN and PNP sensor accesses according to the present invention, which includes:
an optoelectronic isolation chip 1, comprising: a light emitting diode 2 and a phototriode 3;
two ends of the light emitting diode are respectively connected with 12V power supply voltage and 0V power supply voltage, and two ends of the phototriode are respectively connected with 24V power supply voltage and 0V power supply voltage;
a resistor R1 and a change-over switch K1 are sequentially arranged between the light-emitting diode and the 12V power supply voltage, a change-over switch K2 is arranged between the light-emitting diode and the 0V power supply voltage, a resistor R2 and a change-over switch K3 are sequentially arranged between the phototriode and the 24V power supply voltage, and a change-over switch K4 is arranged between the phototriode and the 0V power supply voltage;
an Input port is further arranged between the change-over switch K1 and the change-over switch K2, and an Output port is further arranged between the change-over switch K3 and the change-over switch K4;
the three contact pins of the switch K1 are respectively set to a, b and c, the three contact pins of the switch K2 are respectively set to d, e and f, the three contact pins of the switch K3 are respectively set to g, h and i, and the three contact pins of the switch K4 are respectively set to j, K and l.
The sensor input, signal output adaptation (jumper) principle does among this patent:
the K1 and K2 jumpers realize the adaptation of PNP and NPN sensors at the input ends:
【1】 For an NPN sensor, sensor current path ① is achieved by manual jumpers K1 (turn ab on), K2 (turn df on) current passes through the 12V power supply, switch K1(ab on), through current limiting resistor R1 in the opto-isolated chip, through K2(df on) and into the Input1 port.
【2】 For a PNP type sensor, a sensor current path ② is realized by manual jumpers K1 (make ab turn on) and K2 (make df turn on). Current passes through an Input1 port, passes through K1(ac turn on), passes through a current limiting resistor R1 in a limited photoelectric isolation chip, passes through a switch K2(de turn on), and enters a power supply of 0V.
The K3 and K4 jumpers realize the adaptation of output PNP and NPN signals:
【3】 For PNP type signal Output, a PNP type signal Output channel ③ is realized through a manual jumper K3 (enabling gi to be connected) and K4 (enabling jk to be connected), wherein current passes through a 24V power supply, K3 (enabling gi to be connected), passes through a current limiting resistor R2 in a photoelectric isolation chip, and enters an Output1 port through K4 (enabling jk to be connected);
【4】 For NPN type signal Output, an NPN type signal Output channel ④ is realized through manual jumpers K3 (enabling gh to be connected) and K4 (enabling jl to be connected), wherein current passes through an Output1 port, passes through K3 (enabling gh to be connected), passes through current limiting resistors R2 and K4 (enabling jl to be connected) in a photoelectric isolation chip and enters a power supply 0V;
in another example, the resistance value of the resistor R1 is set to 3000 ohms. The conduction current of the photoelectric isolation input end is ensured to be within a 3-5 mA working range, and the stability of the current of the input end is ensured.
In another example, the resistance value of the resistor R2 is set to 5000 ohms. The conduction current of the photoelectric isolation output end is ensured to be within a 3-5 mA working range, and the stability of the current of the output end is ensured.
In another example, the model of the optoelectronic isolation chip is set to be TPL 521-2. The model of the photoelectric isolation chip is set to be the model, so that the photoelectric isolation chip has the advantages of good photoelectric isolation effect on the sensor, low cost and easiness in acquisition.
The number of apparatuses and the scale of the process described here are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention to a photoelectric isolation module compatible with NPN and PNP sensor access will be apparent to those skilled in the art.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the applications listed in the specification and the examples. It can be applicable to various and be fit for the utility model discloses a field completely. Additional modifications will readily occur to those skilled in the art. The invention is therefore not to be limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.
Claims (4)
1. A photoelectric isolation module compatible with NPN and PNP type sensors, comprising:
an opto-electrically isolated chip, comprising: a light emitting diode and a photo transistor;
two ends of the light emitting diode are respectively connected with 12V power supply voltage and 0V power supply voltage, and two ends of the phototriode are respectively connected with 24V power supply voltage and 0V power supply voltage;
a resistor R1 and a change-over switch K1 are sequentially arranged between the light-emitting diode and the 12V power supply voltage, a change-over switch K2 is arranged between the light-emitting diode and the 0V power supply voltage, a resistor R2 and a change-over switch K3 are sequentially arranged between the phototriode and the 24V power supply voltage, and a change-over switch K4 is arranged between the phototriode and the 0V power supply voltage;
an Input port is further arranged between the change-over switch K1 and the change-over switch K2, and an Output port is further arranged between the change-over switch K3 and the change-over switch K4;
the three contact pins of the switch K1 are respectively set to a, b and c, the three contact pins of the switch K2 are respectively set to d, e and f, the three contact pins of the switch K3 are respectively set to g, h and i, and the three contact pins of the switch K4 are respectively set to j, K and l.
2. The optoelectronic isolation module compatible with NPN and PNP sensor access according to claim 1, wherein the resistance value of the resistor R1 is set to 3000 ohms.
3. The optoelectronic isolation module compatible with NPN and PNP sensor access according to claim 1, wherein the resistance value of the resistor R2 is set to 5000 ohms.
4. The optoelectronic isolation module compatible with the access of NPN and PNP sensors according to claim 1, wherein the model of the optoelectronic isolation chip is TPL 521-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921613918.8U CN210225388U (en) | 2019-09-26 | 2019-09-26 | Photoelectric isolation module compatible with NPN and PNP type sensors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921613918.8U CN210225388U (en) | 2019-09-26 | 2019-09-26 | Photoelectric isolation module compatible with NPN and PNP type sensors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210225388U true CN210225388U (en) | 2020-03-31 |
Family
ID=69920865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921613918.8U Active CN210225388U (en) | 2019-09-26 | 2019-09-26 | Photoelectric isolation module compatible with NPN and PNP type sensors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210225388U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117148780A (en) * | 2023-11-01 | 2023-12-01 | 深圳和润达科技有限公司 | PLC input/output polarity automatic switching device, switching method and electronic equipment |
-
2019
- 2019-09-26 CN CN201921613918.8U patent/CN210225388U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117148780A (en) * | 2023-11-01 | 2023-12-01 | 深圳和润达科技有限公司 | PLC input/output polarity automatic switching device, switching method and electronic equipment |
| CN117148780B (en) * | 2023-11-01 | 2024-01-26 | 深圳和润达科技有限公司 | PLC input/output polarity automatic switching device, switching method and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206523760U (en) | The general detection circuit of digital quantity input signal | |
| CN102340350A (en) | DDMI (digital diagnostic monitoring interface) optical module transmitter circuit and optical power monitoring method for same | |
| CN210225388U (en) | Photoelectric isolation module compatible with NPN and PNP type sensors | |
| CN115453957B (en) | Digital quantity input acquisition system | |
| CN203278656U (en) | Switching power supply, and optoelectronic coupler isolation transmission circuit for digital-control switching power supply | |
| CN205283539U (en) | Intelligence luminous power collection system | |
| CN214704618U (en) | Serial port communication multiplexing circuit | |
| CN102063082A (en) | Digital input circuit | |
| CN205265517U (en) | Dry node output circuit device that optic fibre is kept apart | |
| CN214177294U (en) | Bidirectional isolation circuit, analog output circuit and chip | |
| CN113606761A (en) | Current loop communication circuit and air conditioner | |
| CN104519623B (en) | Transmission system based on DALI (digital addressable lighting interface) protocol control commands | |
| CN210466075U (en) | Information acquisition and control device for clothes hanger hanging system | |
| CN201797506U (en) | Anti-reverse limited current circuit for external input of optical coupler | |
| CN105846903A (en) | Low-speed rate DC-20Mbps receiving-transmitting integrated SFP optical module | |
| CN202550878U (en) | DC voltage accurate isolator based on common optical coupler | |
| CN201707378U (en) | High-accuracy linear isolating circuit based on common optical coupler | |
| CN203206249U (en) | Conversion unit between optical fiber and RS485 or RS232 | |
| CN201173944Y (en) | Optical coupling isolation control interface circuit structure | |
| CN210444247U (en) | Serial port communication isolation circuit based on optical coupling isolation and triode power amplifier | |
| CN205864416U (en) | The RS485 telecommunication circuit controlled with signal transmitting and receiving | |
| CN215809187U (en) | Current loop communication circuit and air conditioner | |
| CN216531280U (en) | 4 way 232 changes 485 high-speed transmission isolation module | |
| CN210780732U (en) | High-precision analog quantity signal output circuit of simple PLC | |
| CN206712770U (en) | A kind of isolation module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |