CN215835203U - Power supply circuit of nozzle head plate and nozzle head plate - Google Patents
Power supply circuit of nozzle head plate and nozzle head plate Download PDFInfo
- Publication number
- CN215835203U CN215835203U CN202122099727.8U CN202122099727U CN215835203U CN 215835203 U CN215835203 U CN 215835203U CN 202122099727 U CN202122099727 U CN 202122099727U CN 215835203 U CN215835203 U CN 215835203U
- Authority
- CN
- China
- Prior art keywords
- power supply
- power
- control module
- transformer
- pin
- 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
- Dc-Dc Converters (AREA)
Abstract
The utility model relates to a power supply circuit of a nozzle head plate and the nozzle head plate, wherein the power supply circuit comprises: a power sourcing equipment circuit and a powered device circuit; the power supply equipment circuit comprises a first socket of an external power input interface, a first network port of gigabit network data, a second network port of the gigabit network data synthesized with a power supply, a power supply control module and a power supply transformer; the first socket is connected with a power supply transformer, and the output end of the power supply transformer is also connected with a second network port for synthesizing gigabit network data and a power supply; the power receiving equipment circuit comprises a third network port formed by combining gigabit network data and a power supply, a power receiving power supply transformer, a power receiving control module, a diode bridge controller and an isolation power supply; by introducing the LOTPoE + + power supply circuit into the single-nozzle head plate based on the gigabit network port, the 'daisy chain type' connection of the original multi-head plate power supply is not needed, the electrical wiring is simplified, and the anti-interference performance is strong.
Description
Technical Field
The utility model relates to the technical field of power supply, in particular to a power supply circuit of a nozzle head plate and the nozzle head plate.
Background
In recent years, the digital printing industry is rapidly developed, the market share of digital printing at home and abroad shows a great trend, and the ink jet technology becomes the most development potential technical direction in the development of digital printing due to the unique technical characteristics of the ink jet technology.
In the spraying process, a sprayer is needed to be adopted for spraying, a plurality of sprayer head plates are needed to be cascaded in the actual using process, for example, as shown in fig. 1, an external alternating current 220V AC-DC single-group or multi-group industrial power adapter meeting the power requirement is adopted as the cascaded sprayer head plate for supplying power, the power supply of the sprayer head plates is designed into an input connector and an output connector, and accordingly the cascaded sprayer head plate power supply inside the multi-head spraying machine forms a 'daisy chain type' connection through a short jumper, and the electrical wiring is convenient.
Although the existing scheme is simple and clear in electrical wiring, the total length of the electrical wiring is reduced by adopting the 'daisy chain' of the short jumper when the plurality of nozzle head plates are used for supplying power, but the multiple plates are grounded, and the board card closer to the external industrial power adapter is easily influenced by noise of other board cards due to superposition of common-mode current of a power supply loop, so that the anti-interference performance of the whole machine is reduced, and the performance of the whole machine is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a power supply circuit of a nozzle head plate and the nozzle head plate, which aim to solve the defects in the prior art, and the technical problem to be solved by the utility model is realized by the following technical scheme.
In a first aspect, an embodiment of the present invention provides a power supply circuit of a head plate, the power supply circuit including: a power sourcing equipment circuit and a powered device circuit; the power supply equipment circuit comprises a first socket of an external power input interface, a first network port of gigabit network data, a second network port of the gigabit network data synthesized with a power supply, a power supply control module and a power supply transformer; the first socket is connected with the power supply transformer, the output end of the power supply transformer is respectively connected with the first socket of the external power supply input interface and the power supply control module, and the output end of the power supply transformer is also connected with a second network port formed by synthesis of the gigabit network data and the power supply; the power supply control module is externally connected with an N-channel first field effect transistor with low on-resistance, a seventeenth resistor is arranged between a fourth pin and a fifth pin of the power supply control module, and the seventeenth resistor is used for detecting current;
the power receiving equipment circuit comprises a third network port formed by combining gigabit network data and a power supply, a power receiving power supply transformer, a power receiving control module, a diode bridge controller and an isolation power supply; the third network port is connected with the power receiving power transformer, and the power receiving power transformer is used for acquiring power receiving energy from a central tap of the gigabit network transformer;
the diode bridge controller is connected with the field effect tube through a bus to form a double-path active rectifier bridge, and is used for rectifying the received electric energy obtained from the network transformer and generating single-power direct-current output;
the power receiving control module is connected with the bus and used for selecting the type and power of a power receiving device;
the isolation power supply is connected with the power receiving control module and used for isolating power supplies of other modules.
Optionally, the first pin of the power supply control module is grounded through an eighteenth resistor, and a power supply mode of an end-to-end bridging method is adopted. Optionally, a twelfth pin of the power supply control module is connected to a preset voltage value through a fourteenth resistor, and is used for determining a power supply mode of the power supply control module.
Optionally, the power supply transformer is model 7490220123, the positive pole of the output voltage of the power supply control module is connected to the corresponding center taps of the first wire pair and the third wire pair of the power supply transformer, and the negative pole of the output voltage of the power supply control module is connected to the corresponding center taps of the second wire pair and the fourth wire pair of the power supply transformer.
Optionally, a third pin of the diode bridge controller is connected to the bus through a twentieth resistor, and a fourth pin of the diode bridge controller is connected to the bus through a twenty-first resistor.
Optionally, the isolation power supply is used for isolating power inputs of other modules such as control and drive of the head plate of the shower head;
the output voltage end of the diode bridge controller is connected with the first light-emitting diode through an eleventh resistor;
and an eighth pin of the isolation power supply is connected with a third light emitting diode through a fourteenth resistor, and the eighth pin is connected with a preset voltage value.
Optionally, a transient voltage suppressor is placed between the first pin and the eighth pin of the power supply control module.
Optionally, the eighth pin of the power supply control module is connected to ground through a twelfth resistor.
In a second aspect, embodiments of the present invention provide a showerhead plate including the above-described power supply circuit of the showerhead plate.
The embodiment of the utility model has the following advantages:
the embodiment of the utility model provides a power supply circuit of a nozzle head plate and the nozzle head plate, wherein the power supply circuit comprises: a power sourcing equipment circuit and a powered device circuit; the power supply equipment circuit comprises a first socket of an external power input interface, a first network port of gigabit network data, a second network port of the gigabit network data synthesized with a power supply, a power supply control module and a power supply transformer; the first socket is connected with a power supply transformer, the output end of the power supply transformer is respectively connected with the first socket of an external power input interface and a power supply control module, and the output end of the power supply transformer is also connected with a second network port for synthesizing gigabit network data and a power supply; the power receiving equipment circuit comprises a third network port formed by combining gigabit network data and a power supply, a power receiving power supply transformer, a power receiving control module, a diode bridge controller and an isolation power supply; the third network port is connected with a power receiving power transformer, and the power receiving power transformer is used for acquiring power receiving energy from a central tap of the gigabit network transformer; the diode bridge controller is connected with the field effect tube through a bus to form a double-path active rectifier bridge, and is used for rectifying the received electric energy obtained from the network transformer and generating single-power direct-current output; the power receiving control module is connected with the bus and used for selecting the type and power of the power receiving equipment; the isolation power supply is connected with the power receiving control module and used for isolating power supplies of other modules. By introducing the LOTPoE + + power supply circuit into the single-nozzle head plate based on the gigabit network port, the 'daisy chain type' connection of the original multi-head plate power supply is not needed, the electrical wiring is simplified, and the anti-interference performance is strong.
Drawings
FIG. 1 is a schematic view of a single head plate and a plurality of single head plates for electrical connection of a showerhead in the prior art;
fig. 2 is a schematic structural view of an embodiment of a power supply circuit of a head plate for a showerhead of the present invention;
FIG. 3a is a schematic diagram of the connection of the power unit circuitry of the present invention;
FIG. 3b is a schematic diagram of the connection of a further power unit circuit of the present invention;
FIG. 4a is a schematic diagram of the connection of the power receiving device circuit of the present invention;
FIG. 4b is a schematic diagram of a connection of a further powered device circuit of the present invention;
fig. 4c is a schematic diagram of a circuit of another power receiving device according to the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 2, there is shown a schematic structural view of an embodiment of a power supply circuit of a head plate for a showerhead of the present invention, the power supply circuit of the head plate comprising:
a power supply apparatus circuit 101 and a powered apparatus circuit 102; the power supply equipment circuit comprises a first socket of an external power input interface, a first network port of gigabit network data, a second network port of the gigabit network data synthesized with a power supply, a power supply control module and a power supply transformer; the first socket is connected with a power supply transformer, the output end of the power supply transformer is respectively connected with the first socket of an external power input interface and a power supply control module, and the output end of the power supply transformer is also connected with a second network port for synthesizing gigabit network data and a power supply;
specifically, in the prior art, the ethernet is used for Power supply, an external Power supply needs to be separately configured, if the Power is supplied by multiple boards, multiple boards are grounded in common, and boards closer to an external Power adapter are further enabled to be easily affected by noise of other boards due to superposition of common-mode currents of Power supply loops, so that the interference resistance of the whole machine is reduced, and the performance of the whole machine is affected, therefore, the embodiment of the utility model provides a Power supply circuit of a shower head board, and a PSE (Power Sourcing Equipment) is required to be matched with a pd (Power device) and a powered device), so that Power of up to 90W can be provided through a CAT-5 or super-five cable. Specific parameters are shown in table 1 below.
At present, a single-nozzle head board of a single-board architecture mainly adopts a gigabit network data interface, and an external power supply of the head board is generally not lower than 75W, so that the optimal choice of the scheme is that the power of a PD (powered device) is expanded to the LTPoE + + standard of 90W.
The embodiment of the utility model firstly introduces the LTPoE + + power supply circuit into a single spray head plate based on a gigabit network port. The gigabit network port data and the power supply are synthesized into the same super-five network cable, and 2 external power supply sockets and power supply wiring of the original single head board are removed.
TABLE 1
Specifically, as shown in fig. 3a and 3b, for a complete connection schematic diagram of a power supply device circuit, the PSE (power supply device) circuit of the present invention mainly includes a first socket JP1 of an external power input interface, a first port RJ1 (a first port of gigabit network data) as a gigabit network data port, a second port RJ2 (a second port of gigabit network data and power supply combination) as a network port conforming to LTPoE + + standard, a single-port LTPoE PSE power supply device controller U1 (a power supply control module and a power supply transformer), and a LTPoE + + power supply transformer T1 (a power supply transformer).
Specifically, the single-port LTPoE + + PSE controller U1 selects an N-channel first field effect transistor Q1 with low on-resistance connected to the outside of the LTC4279, and a seventeenth resistor R17 with 0.1 ohm for current detection is connected between the fourth pin and the fifth pin of the controller. Since the 4 pairs of differential line pairs of the gigabit port of the present invention need to transmit power, the first pin of the controller is grounded through the eighteenth resistor R18, and it is determined that LTC4279 is powered by End-span. To ensure the current detection accuracy, the resistance accuracy must be 1% or higher, and the temperature coefficient is not higher than + -200 ppm/DEG C. When the PCB is arranged, in order to ensure the current detection accuracy, Kelvin connections (also called forced and sense connections) are performed between the two pins and the current detection resistor R17, which are used to eliminate the voltage drop effect generated on the wires in the circuit.
The twelfth pin of the controller is connected to VEE through a fourteenth resistor R14 to determine that LTC4279 provides power mode LTPoE + + 90W. Because the LTPoE + +90W power needs the gigabit network to transmit 4 pairs of differential data line pairs, 7490220123 is selected as an LTPoE + + power transformer T1, the positive pole VPORT + of the output voltage of the controller U1 is connected to the corresponding center taps of the first line pair and the third line pair of the transformer, and the negative pole VPORT-of the output voltage of the controller U1 is connected to the corresponding center taps of the second line pair and the fourth line pair of the transformer;
a twentieth resistor R20 and a twenty-first resistor R21 connected with a third pin (RCLASS) and a fourth pin (RCLASS) of the LTPoE + + PD controller U2LT4275 are PD power level grading resistors so as to ensure the grading accuracy, the precision of the two resistors must be 1% or higher, and the two resistors are placed close to the LT4275 chip as much as possible, so that the adverse effect caused by overlarge parasitic capacitance generated by a lead wire is avoided;
in order to protect the LTPoE + + PSE controller LTC4279, a TVS transient voltage suppressor (a second diode D2) is placed between the first pin 0(VEE) and the eighth pin (AGND) of the LTC4279, and the utility model selects the SMAJ58A and places the bypass capacitor (the eighth capacitor 8) as close as possible to the LTC 4279.
The LTC4279 eighth pin (AGND) the eighth pin (AGND) cannot be directly connected to the external power ground GND, requiring a 10 ohm, 0805 resistor (12 th resistor R12) to be placed.
A clamp diode (a third diode D3) is placed between the voltage output end VPORT-of pin 7(OUT) of the LTC4279 and the external power ground GND, and an output capacitor (a seventeenth capacitor C7) is placed as close to the LT4275 chip as possible.
Because the utility model is LTPoE + +90W power, the PCB layout must consider heat dissipation measures, such as: increase PAD area, the power adopts the layering alone and increases to walk the line width, adopts heat dissipation measures such as special external field effect transistor.
Fig. 4a to 4c are schematic connection diagrams of a complete powered device circuit, which includes: the power receiving equipment circuit comprises a third network port formed by combining gigabit network data and a power supply, a power receiving power supply transformer, a power receiving control module, a diode bridge controller and an isolation power supply; the third network port is connected with a power receiving power transformer, and the power receiving power transformer is used for acquiring power receiving energy from a central tap of the gigabit network transformer;
the diode bridge controller is connected with the field effect tube through a bus to form a double-path active rectifier bridge, and is used for rectifying the received electric energy obtained from the network transformer and generating single-power direct-current output;
the power receiving control module is connected with the bus and used for selecting the type and power of the power receiving equipment;
the isolation power supply is connected with the power receiving control module and used for isolating power supplies of other modules.
Specifically, the system comprises a first port RJ1 (a third port for combining gigabit network data and a power supply) of a gigabit network data and power supply combined port conforming to the LTPoE + + standard, a LTPoE + + power supply transformer T1 (a power receiving power supply transformer), a LTPoE + + PD controller U1 (a power receiving control module), a diode bridge controller U2 (a diode bridge controller), and an isolation power supply U3.
Wherein: 7490220123 is selected as LTPoE + + power transformer T1 and used for acquiring received power from a central tap of a gigabit network transformer; the diode bridge controller U2 selects LT4321 to form a double-path active rectifier bridge with the first to eighth field effect transistors Q1-Q8, so that the power supply of the 4 pairs of differential data lines is rectified and smoothly integrated into single-power-supply direct-current output with correct polarity;
the LTPoE + + PD controller selects LT4275, a characteristic resistor, an under-voltage locking and thermal protection circuit are arranged in the controller, and an external N-channel power field effect FET (a ninth field effect transistor Q9) is connected with an internal charge pump, so that heat generated by LT4275 is reduced, and power supply efficiency is improved.
The PD type and power can be selected through the grading resistors on the third pin and the fourth pin of the LT4275, the PD type is configured to be LTPoE + +, and the available PD power is 90W through the selection of the resistances of the twentieth resistor R20 and the twenty-first resistor R21;
in order to prevent adverse effects on control and driving of the spray head in the power extraction process of the LTPoE + + PD (powered device), an isolation power supply U3 is adopted to perform isolation processing on power input of other modules such as single spray head plate control and driving.
The led D1 and its current-limiting eleventh resistor R11, the led D3 and its current-limiting fourteenth resistor R14 are used as voltage indicators for the output voltage VOUT of the LTPoE + + PD controller and the output voltage of the isolation power supply U3, respectively.
In order to protect the LTPoE + + PD controller LT4275 from placing a TVS transient voltage suppressor (fourth diode D4) between the port voltages VPORTP and VPORTN, the present invention selects SMAJ58A and places the input capacitor (twelfth capacitor C12) as close to the LT4275 chip as possible.
The embodiment of the utility model provides a power supply circuit of a nozzle head plate and the nozzle head plate, wherein the power supply circuit comprises: a power sourcing equipment circuit and a powered device circuit; the power supply equipment circuit comprises a first socket of an external power input interface, a first network port of gigabit network data, a second network port of the gigabit network data synthesized with a power supply, a power supply control module and a power supply transformer; the first socket is connected with a power supply transformer, the output end of the power supply transformer is respectively connected with the first socket of an external power input interface and a power supply control module, and the output end of the power supply transformer is also connected with a second network port for synthesizing gigabit network data and a power supply; the power receiving equipment circuit comprises a third network port formed by combining gigabit network data and a power supply, a power receiving power supply transformer, a power receiving control module, a diode bridge controller and an isolation power supply; the third network port is connected with a power receiving power transformer, and the power receiving power transformer is used for acquiring power receiving energy from a central tap of the gigabit network transformer; the diode bridge controller is connected with the field effect tube through a bus to form a double-path active rectifier bridge, and is used for rectifying the received electric energy obtained from the network transformer and generating single-power direct-current output; the power receiving control module is connected with the bus and used for selecting the type and power of the power receiving equipment; the isolation power supply is connected with the power receiving control module and used for isolating power supplies of other modules. By introducing the LOTPoE + + power supply circuit into the single-nozzle head plate based on the gigabit network port, the 'daisy chain type' connection of the original multi-head plate power supply is not needed, the electrical wiring is simplified, and the anti-interference performance is strong.
It should be noted that the above detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. Furthermore, it will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in other sequences than those illustrated or otherwise described herein.
Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may also be oriented in other different ways, such as by rotating it 90 degrees or at other orientations, and the spatially relative descriptors used herein interpreted accordingly.
In the foregoing detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, like numerals typically identify like components, unless context dictates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A power supply circuit of a head plate for a head, the power supply circuit comprising: a power sourcing equipment circuit and a powered device circuit; the power supply equipment circuit comprises a first socket of an external power input interface, a first network port of gigabit network data, a second network port of the gigabit network data synthesized with a power supply, a power supply control module and a power supply transformer; the first socket is connected with the power supply transformer, the output end of the power supply transformer is respectively connected with the first socket of the external power supply input interface and the power supply control module, and the output end of the power supply transformer is also connected with a second network port formed by synthesis of the gigabit network data and the power supply; the power supply control module is externally connected with a first field effect transistor with low on-resistance, a seventeenth resistor is arranged between a fourth pin and a fifth pin of the power supply control module, and the seventeenth resistor is used for detecting current;
the power receiving equipment circuit comprises a third network port formed by combining gigabit network data and a power supply, a power receiving power supply transformer, a power receiving control module, a diode bridge controller and an isolation power supply; the third network port is connected with the power receiving power transformer, and the power receiving power transformer is used for acquiring power receiving energy from a central tap of the gigabit network transformer;
the diode bridge controller is connected with the field effect tube through a bus to form a double-path active rectifier bridge, and is used for rectifying the received electric energy obtained from the network transformer and generating single-power direct-current output;
the power receiving control module is connected with the bus and used for selecting the type and power of a power receiving device;
the isolation power supply is connected with the power receiving control module and used for isolating power supplies of other modules.
2. The power supply circuit of claim 1, wherein the first pin of the power supply control module is grounded through an eighteenth resistor and is powered by an end-to-end cross-connect method.
3. The power supply circuit according to claim 1, wherein the twelfth pin of the power supply control module is connected to a preset voltage value through a fourteenth resistor for determining a power supply mode of the power supply control module.
4. The power supply circuit of claim 3 wherein said power supply transformer is model 7490220123, and wherein said power supply control module has an output voltage anode connected to the center taps of the first and third pairs of wires of said power supply transformer, and an output voltage cathode connected to the center taps of the second and fourth pairs of wires of said power supply transformer.
5. The power supply circuit of claim 1, wherein the third pin of the diode bridge controller is connected to the bus line through a twentieth resistor, and the fourth pin is connected to the bus line through a twenty-first resistor.
6. The power supply circuit of claim 1, wherein the isolated power supply is used for isolating power inputs of other modules such as a shower head board control module, a drive module and the like;
the output voltage end of the diode bridge controller is connected with the first light-emitting diode through an eleventh resistor;
and an eighth pin of the isolation power supply is connected with a third light emitting diode through a fourteenth resistor, and the eighth pin is connected with a preset voltage value.
7. The power supply circuit of claim 1, wherein a transient voltage suppressor is disposed between the tenth pin and the eighth pin of the power supply control module.
8. The power supply circuit of claim 7, wherein the eighth pin of the power supply control module is connected to ground through a twelfth resistor.
9. A showerhead plate characterized by comprising a power supply circuit of the showerhead plate according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122099727.8U CN215835203U (en) | 2021-09-01 | 2021-09-01 | Power supply circuit of nozzle head plate and nozzle head plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122099727.8U CN215835203U (en) | 2021-09-01 | 2021-09-01 | Power supply circuit of nozzle head plate and nozzle head plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215835203U true CN215835203U (en) | 2022-02-15 |
Family
ID=80197963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122099727.8U Active CN215835203U (en) | 2021-09-01 | 2021-09-01 | Power supply circuit of nozzle head plate and nozzle head plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215835203U (en) |
-
2021
- 2021-09-01 CN CN202122099727.8U patent/CN215835203U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20110239008A1 (en) | Power Adapter Having a Universal Serial Bus Hub | |
| US20140036400A1 (en) | Protection circuit of power over ethernet port and ethernet power-sourcing equipment | |
| US7884687B2 (en) | Magnetic interface circuit | |
| US6556097B2 (en) | Method and apparatus for distribution of power in a media converter system | |
| US8582271B2 (en) | Over-voltage protection for power and data applications | |
| US9853560B2 (en) | Congruent power and timing signals for device | |
| CN201639593U (en) | PSE power supply module with two paths of network ports | |
| CN104993938B (en) | The PoE transparent transmission power supply circuits of low cost | |
| CN215835203U (en) | Power supply circuit of nozzle head plate and nozzle head plate | |
| CN101163018A (en) | Power supply converter for an electro-receiving end equipment of an Ethernet power supply system | |
| CN113852208B (en) | Power supply circuit of nozzle head plate and nozzle head plate | |
| US20160234029A1 (en) | Power over network device and power over network system including the same | |
| RU2325040C2 (en) | Circuit device equipped with two electronic inductors for every pair of data power transmission line of local network | |
| US9769039B2 (en) | Communication visualization device | |
| CN107534385B (en) | Electrostatic discharge (ESD) protection and method in power supply | |
| TWI547119B (en) | Power conversion system | |
| CN205960974U (en) | Power supply device | |
| CN107070259A (en) | Power circuit for electric energy meter | |
| CN207835051U (en) | A kind of anti-POE power supply misplugs the protection circuit pulled out and a kind of base station | |
| CN104753685B (en) | Power conversion system for Power over Ethernet system | |
| CN109902049A (en) | PCI expanding unit | |
| CN103051210A (en) | Power supply | |
| CN208508513U (en) | Protection circuit for Ethernet and power receiving end equipment with protection circuit | |
| CN214014245U (en) | Repeater drive circuit | |
| CN215263696U (en) | Multipath working condition monitoring terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |