CN220629346U

CN220629346U - POE power supply circuit and network equipment

Info

Publication number: CN220629346U
Application number: CN202322087623.4U
Authority: CN
Inventors: 黄卓佳; 欧永东
Original assignee: TP Link Technologies Co Ltd
Current assignee: TP Link Technologies Co Ltd
Priority date: 2023-08-03
Filing date: 2023-08-03
Publication date: 2024-03-19
Anticipated expiration: 2033-08-03

Abstract

The utility model provides a POE power supply circuit and network equipment, which comprises a signal input end, a signal output end, a signal conversion circuit and a signal output circuit; the signal input end is used for accessing POE signals; the signal conversion circuit performs signal conversion on the POE signal accessed by the signal input end so as to convert the POE signal into a DC electric signal and a POE electric signal; the signal output end receives the DC electric signal and the POE electric signal and outputs the DC electric signal and the POE electric signal to the signal output end respectively through the output end; when the signal output terminal receives the DC electric signal and the POE electric signal, the signal output terminal outputs the DC electric signal and the POE electric signal to external network equipment connected with the signal output terminal. The external network device comprises POE power receiving equipment and direct current power supply equipment. The DC electric signal is output to the direct current power supply equipment to supply power for the direct current power supply equipment; the POE electric signal is output to the POE power receiving equipment to supply power for the POE power receiving equipment, so that one POE power supply equipment can supply power for the POE power receiving equipment and the direct current power supply equipment simultaneously.

Description

POE power supply circuit and network equipment

Technical Field

The utility model relates to the technical field of POE power supply communication, in particular to a POE power supply circuit and network equipment.

Background

POE is an abbreviation for active ethernet power supply, and POE technology is used to transmit data signals to devices such as IP telephony devices, wireless lan access point devices, and network camera devices without any modification to the existing ethernet wiring infrastructure, and simultaneously provides dc power supply for such devices. However, in the prior art, the POE technology can only output POE voltage, cannot provide 12V dc voltage and POE voltage simultaneously, and has a small applicability range, and the application product is single, i.e. one POE power supply device can only supply power to POE powered devices, but cannot supply power to dc power supply devices. Under the scene of only POE power supply, current POE technique can't provide other kinds of voltages, is unfavorable for regional joint defense to distribute accuse implementation.

Disclosure of Invention

The utility model mainly aims to provide a POE power supply circuit and network equipment, and aims to realize that one POE power supply equipment can supply power for POE power receiving equipment and can also supply power for direct current power supply equipment.

Therefore, the present utility model proposes a POE power supply circuit comprising:

the signal input end is used for inputting POE signals;

the signal output end is used for accessing external network equipment;

the signal conversion circuit is electrically connected with the signal input end; the signal conversion circuit is used for converting the POE signal into a DC electric signal and a POE electric signal;

the input end of the signal output circuit is electrically connected with the output end of the signal conversion circuit, and the output end of the signal output circuit is connected with the signal output end; the signal output circuit is used for outputting the DC electric signal and the POE electric signal to external network equipment connected with the signal output circuit so as to supply power for the external network equipment.

Optionally, the POE power supply circuit further includes:

the network signal output end is used for accessing external network equipment;

the signal conversion circuit is further configured to convert the POE signal into a network signal and output the network signal to the signal output circuit, so that the network signal is output to an external network device, so as to realize communication with the network device.

Optionally, the signal conversion circuit includes:

the network signal conversion circuit is used for outputting network signals after carrying out signal conversion on the POE signals.

Optionally, the POE power supply circuit further includes:

the input end of the network signal output circuit is electrically connected with the output end of the network signal conversion circuit, the output end of the network signal output circuit is electrically connected with the network signal output end, and the network signal output circuit is used for outputting the network signal to the network signal output end.

Optionally, the network signal conversion circuit includes:

the input end of the network transformer is connected with the signal input end, and the network transformer is used for converting the voltage of the POE signal into a signal and then outputting a network signal;

and the input end of the Ethernet conversion controller is connected with the output end of the network transformer, and the Ethernet conversion controller is used for multiplexing the network signals.

Optionally, the number of the output ends of the ethernet conversion controllers is multiple, the number of the network signal output ends is multiple, and each output end of the ethernet conversion controllers is connected with each network signal output end in a one-to-one correspondence manner.

Optionally, the signal conversion circuit includes:

the POE electric signal conversion circuit is used for converting the POE signal into a POE electric signal and then outputting the POE electric signal;

and the first input end of the DC electric signal conversion circuit is electrically connected with the output end of the POE electric signal conversion circuit, and the DC electric signal conversion circuit is used for outputting a DC electric signal after carrying out signal conversion on the POE signal.

Optionally, the signal conversion circuit further includes:

the input end of the voltage detection circuit is electrically connected with the output end of the POE electric signal conversion circuit, and the output end of the voltage detection circuit is connected with the second input end of the DC electric signal conversion circuit;

the voltage detection circuit is used for detecting the voltage of the POE electric signal, and outputting an enabling signal to the DC electric signal conversion circuit when the voltage of the POE electric signal reaches a preset voltage, so that the DC electric signal conversion circuit carries out signal conversion on the POE electric signal and then outputs a DC electric signal.

Optionally, the number of the DC electrical signal converting circuits is plural, and plural DC electrical signal converting circuits output DC electrical signals of at least one voltage value.

Optionally, the signal output circuit includes:

the POE electric signal output circuit is characterized in that the input end of the POE electric signal output circuit is electrically connected with the output end of the POE electric signal conversion circuit, and the output end of the POE electric signal output circuit is connected with the signal output end; the POE electric signal output circuit is used for outputting the POE electric signal to the signal output end;

the input end of the DC electric signal output circuit is electrically connected with the output end of the DC electric signal conversion circuit, and the output end of the DC electric signal output circuit is connected with the other signal output end; the DC electrical signal output circuit is used for outputting the DC electrical signal to the other signal output end.

The utility model also provides network equipment comprising the POE power supply circuit.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a circuit flow chart of a POE power supply circuit and network device of the present utility model;

fig. 2 is a circuit flow diagram of another embodiment of a POE power supply circuit and network device of the present utility model;

fig. 3 is a circuit configuration diagram of a POE power supply circuit and network device of the present utility model;

fig. 4 is a circuit configuration diagram of another embodiment of a POE power supply circuit and network device of the present utility model;

fig. 5 is a circuit configuration diagram of another embodiment of a POE power supply circuit and network device of the present utility model;

fig. 6 is a circuit configuration diagram of another embodiment of a POE power supply circuit and network device of the present utility model.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

It should be understood that POE is an abbreviation for active power over ethernet, and POE technology is used to transmit data signals to devices such as IP telephony devices, wireless lan access point devices, and network camera devices without any modification to the existing ethernet wiring infrastructure, and at the same time provides a dc power supply technology for such devices. However, in the prior art, the POE technology can only output POE voltage, cannot provide 12V dc voltage and POE voltage simultaneously, and has a small applicability range, and the application product is single, i.e. one POE power supply device can only supply power to POE powered devices, but cannot supply power to dc power supply devices. Under the scene of only POE power supply, current POE technique can't provide other kinds of voltages, is unfavorable for regional joint defense to distribute accuse implementation.

Therefore, the present utility model proposes a POE power supply circuit, referring to fig. 1, comprising:

a signal input terminal 10 for inputting POE signals;

a signal output terminal 40 for accessing an external network device;

a signal conversion circuit 20, the signal conversion circuit 20 being electrically connected to the signal input terminal 10; the signal conversion circuit 20 is configured to convert the POE signal into a DC electrical signal and a POE electrical signal;

a signal output circuit 30, wherein an input end of the signal output circuit 30 is electrically connected with an output end of the signal conversion circuit 20, and an output end of the signal output circuit 30 is connected with the signal output end 40; the signal output circuit 30 is configured to output the DC electrical signal and POE electrical signal to an external network device connected thereto, so as to supply power to the external network device.

It is understood that in this embodiment, the network device may be a network camera device, and POE technology is used to provide a data transmission function and a dc power supply function for the network camera device. For the direct current power supply function, the existing POE technology can only provide POE voltage and cannot provide DC voltage. Therefore, the present utility model provides a POE power supply circuit, which includes a signal conversion circuit 20 therein, and is configured to convert an input POE signal into two voltages, and then output the two voltages to power two external network devices.

In this embodiment, the signal input terminal 10 is implemented by using an RJ45 input interface. Further, the signal conversion circuit 20 may include a POE electrical signal conversion circuit 21 and a DC electrical signal conversion circuit 22. Specifically, in practical application, an RJ45 input interface in the POE power supply circuit is connected to a POE signal, and transmits the POE signal to the POE electric signal conversion circuit 21; the POE electric signal conversion circuit 21 performs signal conversion on the POE signal to convert into POE voltage. In the present embodiment, description will be made taking the POE voltage of 48V as an example, specifically, the POE voltage output from the POE electric signal conversion circuit 21 is powered on, detected, classified, and rectified to obtain a stable 48V voltage. It should be understood that the POE electrical signal conversion circuit 21 further includes a rectifier bridge, and referring to fig. 3, the rectifier bridge is composed of four diodes, and the rectifier bridge has a CMT1 interface and a CMT2 interface. In the practical application of the rectifier bridge, POE voltage is input to the rectifier bridge through a CMT1 interface and a CMT2 interface after power-on, detection and classification, and four diodes rectify the POE voltage and output 48V voltage. The 48V voltage is output to the signal output terminal 40 through the signal output circuit 30, and the signal output terminal 40 can output the 48V voltage to an external network device to supply power to the external network device with the operating voltage of 48V. The POE electric signal conversion circuit 21 and the DC electric signal conversion circuit 22 are electrically connected to each other, and the 48V voltage output from the POE electric signal conversion circuit 21 is output not only to an external network device through the signal output terminal 40 but also to the DC electric signal conversion circuit 22, so that the DC electric signal conversion circuit 22 performs direct-current voltage conversion of the 48V voltage to convert it into a DC voltage. It should be appreciated that the DC electrical signal converting circuit 22 may employ a variety of different DC-DC conversion chips U32 to achieve the function of simultaneously outputting a variety of power sources. The DC voltage may be 24V, 12V or 9V. In an embodiment, specifically, the 12V voltage output by the DC-DC conversion chip U32 may be output to the rest of external network devices through the signal output terminal 40, so as to supply power to the external network devices with an operating voltage of 12V. Therefore, the effects of single-port signal input and double-voltage output are realized.

In this embodiment, the signal conversion circuit 20 further includes a network signal conversion circuit 23, so that the POE power supply circuit can not only implement single POE signal input, POE voltage and DC voltage output, but also implement network signal output. The DC voltage may also enable a plurality of voltage value outputs, for example, 5V, 12V, 24V, etc. The network signal conversion circuit 23 in this embodiment includes a transformer and an ethernet conversion controller, when the POE signal is accessed to the signal input terminal 10, the network transformer T7 performs signal conversion on the voltage of the POE signal, and outputs the network signal to the ethernet conversion controller, where the ethernet conversion controller outputs the network signal to a plurality of external network devices through a plurality of output terminals. The network signal may be used for communication between network devices on the one hand, and may be used for signal testing or the like on the other hand, for example, when the network signal output terminal 43 is connected to an external network device, the network signal output by the ethernet switching controller is output to the external network device to establish a communication connection with the network device; when the network signal output end 43 is connected to the network monitoring device, the network signal output by the ethernet conversion controller is output to the network monitoring device, so as to establish a communication connection with the network monitoring device, so as to realize signal testing. In addition, the network signal output by the network signal output terminal 43 can increase the number of concatenations to realize remote data transmission. Moreover, the number of the output ends of the Ethernet conversion controller is multiple, so that the number of the network signal output channels is increased, the network signal output channels are controllable, single-channel output and multi-channel output can be realized, and the Ethernet conversion controller is suitable for simultaneous monitoring and wiring in multiple ways.

The utility model provides a POE power supply circuit, which comprises a signal input end 10, a signal output end 40, a signal conversion circuit 20 and a signal output circuit 30; wherein the input end of the signal conversion circuit 20 is electrically connected with the signal input end 10; the input end of the signal output circuit 30 is electrically connected with the output end of the signal conversion circuit 20, and the output end of the signal output circuit 30 is connected with the signal output end 40; the signal input end 10 is used for accessing POE signals; the signal conversion circuit 20 performs signal conversion on the POE signal received from the signal input terminal 10 to convert the POE signal into a DC electrical signal and a POE electrical signal; the signal output terminal 40 receives the DC electrical signal and the POE electrical signal, and outputs the DC electrical signal and the POE electrical signal to the signal output terminal 40 through the output terminal, respectively; when the POE electrical signal is received, the signal output terminal 40 outputs the POE electrical signal to an external network device connected thereto. The external network device comprises POE power receiving equipment and direct current power supply equipment. The DC electric signal is output to the direct current power supply equipment to supply power for the direct current power supply equipment; the POE electric signal is output to the POE power receiving equipment to supply power for the POE power receiving equipment, so that one POE power supply equipment can supply power for the POE power receiving equipment and the direct current power supply equipment simultaneously.

In an embodiment, referring to fig. 2, the POE power supply circuit further includes:

a network signal output terminal 43 for accessing an external network device or a network monitoring device;

when the network signal output terminal 43 is connected to an external network device, the signal conversion circuit 20 is further configured to convert the POE signal into a network signal and output the network signal to the signal output circuit 30, so as to output the network signal to the external network device, so as to implement communication with the network device;

when the network signal output terminal 43 is connected to a network monitoring device, the signal conversion circuit 20 is further configured to convert the POE signal into a network signal and output the network signal to the signal output circuit 30, so as to output the network signal to the network monitoring device, so as to monitor the working state of the network device.

It will be appreciated that in this embodiment, the signal conversion circuit 20 further includes a network signal conversion circuit 23, so that the POE power supply circuit can implement not only single POE signal input POE voltage and DC voltage output, but also network signal output. The DC voltage may also enable a plurality of voltage value outputs, for example, 5V, 12V, 24V, etc. Wherein the network signal output 43 is connected to different devices to realize different functions.

Taking the network signal output terminal 43 as an example, an RJ24 output interface is used for the description:

in the first embodiment, when the signal output end 40 is connected to an external network device, the network signal conversion circuit 23 converts the POE signal connected to the signal input end 10 into a network signal, and the signal output end 40 transmits the network signal to the external network device to establish a communication connection with the network device, thereby realizing data transmission between the network devices;

in the second embodiment, when the signal output end 40 is connected to the network monitoring device, the network signal conversion circuit 23 converts the POE signal connected to the signal input end 10 into a network signal, and the signal output end 40 transmits the network signal to the network monitoring device to establish a communication connection with the network monitoring device, thereby realizing real-time monitoring of the working state of the network device.

In one embodiment, referring to fig. 2, the signal conversion circuit 20 includes:

the input end of the network signal conversion circuit 23 is electrically connected with the signal input end 10, and the network signal conversion circuit 23 is used for converting the POE signal into a signal and outputting the network signal.

It will be appreciated that the signal conversion circuit 20 in this embodiment further includes a network signal conversion circuit 23, which is used for communication between network devices on the one hand, and for external signal integrity testing, etc. on the other hand.

the input end of the network signal output circuit 33 is electrically connected with the output end of the network signal conversion circuit 23, the output end of the network signal output circuit 33 is electrically connected with the network signal output end 43, and the network signal output circuit 33 is used for outputting the network signal to the network signal output end 43.

It will be appreciated that the network signal output circuit 33 in this embodiment is configured to receive the network signal output by the network signal conversion circuit 23 and output the network signal to the network signal output terminal 43. The network signal output end 43 is implemented by adopting the signal output end 40, and when the signal output end 40 is connected to an external network device, the signal output end 40 transmits a network signal to the external network device so as to establish communication connection with the network device, thereby implementing data transmission between the network devices; when the signal output end 40 is connected to the network monitoring device, the signal output end 40 transmits the network signal to the network monitoring device so as to establish communication connection with the network monitoring device, thereby realizing real-time monitoring of the working state of the network device.

In one embodiment, referring to fig. 2 and 6, the network signal conversion circuit 23 includes:

the input end of the network transformer T7 is connected with the signal input end 10, and the network transformer T7 is used for converting the voltage of the POE signal into a signal and then outputting a network signal;

and the input end of the Ethernet conversion controller is connected with the output end of the network transformer T7, and the Ethernet conversion controller is used for multiplexing the network signals.

The number of the output ends of the Ethernet conversion controllers is multiple, the number of the network signal output ends is multiple, and the output ends of each Ethernet conversion controller are connected with each network signal output end in a one-to-one correspondence mode.

It will be appreciated that in this embodiment, the network transformer has tx+ pins, TX-pins, rx+ pins, RX-pins, TX1P pins, TX1N pins, RX1N pins, and RX1P pins; the TX+ pin, the TX-pin, the RX+ pin and the RX-pin are input ends of the network transformer for receiving POE signals, and the TX1P pin, the TX1N pin, the RX1N pin and the RX1P pin are output ends of the network transformer for outputting voltage after transformation. In practical application, after the POE signal is connected to the signal input terminal 10, the tx+ pin, TX-pin, rx+ pin, and RX-pin of the network transformer T7 receive the POE signal, and the network transformer T7 transforms the voltage of the POE signal, and outputs a network signal with a suitable level to the ethernet switching controller through the TX1P pin, the TX1N pin, the RX1N pin, and the RX1P pin.

When the network signal output end 43 is connected to the external network device, the network signal output by the ethernet conversion controller sequentially passes through the network signal output circuit 33 and the network signal output end 43 to be output to the external network device so as to establish communication connection with the network device; when the network signal output end 43 is connected to the network monitoring device, the network signal output by the ethernet conversion controller sequentially passes through the network signal output circuit 33 and the network signal output end 43 to be output to the network monitoring device, so as to establish communication connection with the network monitoring device. In addition, in this embodiment, the number of the output ends of the ethernet switching controllers is plural, and the number of the network signal output ends is plural, where the output end of each ethernet switching controller is connected to each network signal output end in a one-to-one correspondence manner. Therefore, the number of the output ends of the Ethernet conversion controller is increased, so that the output channels of the network signals are increased, the output channels of the network signals are controllable, single-channel output and multi-channel output can be realized, and the Ethernet conversion controller is suitable for simultaneous monitoring and wiring in multiple places and long-distance network signal transmission. For example, after the POE signal is converted by the network transformer T7, the POE signal is output through the output end of the network transformer T7, and the ethernet conversion controller receives the network signal and outputs the network signal to a plurality of network signal output ends through a plurality of output ends, where the plurality of network signal output ends output the plurality of network signals to an external network device, so as to implement expansion of the network signal output channel.

In one embodiment, referring to fig. 2 and 5, the signal conversion circuit 20 includes:

a POE electrical signal conversion circuit 21, an input end of the POE electrical signal conversion circuit 21 is electrically connected to the signal input end 10, and the POE electrical signal conversion circuit 21 is configured to perform signal conversion on the POE signal and output a POE electrical signal;

the DC electrical signal conversion circuit 22, an input end of the DC electrical signal conversion circuit 22 is electrically connected to an output end of the POE electrical signal conversion circuit 21, and the DC electrical signal conversion circuit 22 is configured to perform signal conversion on the POE electrical signal and output a DC electrical signal.

It is to be understood that the signal conversion circuit 20 in the present embodiment includes two signal conversion circuits 20, that is, a POE electric signal conversion circuit 21 and a DC electric signal conversion circuit 22. The POE electrical signal conversion circuit 21 is configured to convert an accessed POE signal into a 48V voltage, so as to supply power to an external network device with an operating voltage of 48V. The DC electrical signal conversion circuit 22 is configured to receive the 48V voltage output by the POE electrical signal conversion circuit 21, and convert the 48V voltage into 5V voltage, 12V voltage, 24V voltage, so as to supply power to an external network device with an operating voltage of 5V, an external network device with an operating voltage of 12V, or an external network device with an operating voltage of 24V.

Alternatively, the DC electrical signal conversion circuit 22 may further convert the POE electrical signal into a DC electrical signal when receiving the enable signal EN. Here, referring to fig. 2, the enable signal EN is a signal for triggering the DC-DC conversion by the DC electric signal conversion circuit 22, and may be output by the voltage detection circuit 50. Referring to fig. 5, the DC electric signal conversion circuit 22 in the present embodiment is implemented with a DC-DC conversion chip U32, and the DC-DC conversion chip U32 has an input pin, an enable pin, and an output pin. Specifically, when the enable pin of the DC-DC conversion chip U32 receives the enable signal EN and the input pin of the DC-DC conversion chip U32 receives the 48V voltage, the DC-DC conversion chip U32 DC-DC converts the 48V voltage and then outputs the 5V voltage, the 12V voltage or the 24V voltage through the output pin to supply power to the external network device with the operating voltage of 5V, the external network device with the operating voltage of 12V or the external network device with the operating voltage of 24V.

In an embodiment, referring to fig. 2 and 4, the signal conversion circuit 20 further includes:

a voltage detection circuit 50, wherein an input end of the voltage detection circuit 50 is electrically connected with an output end of the POE electrical signal conversion circuit 21, and an output end of the voltage detection circuit 50 is connected with an enable input end of the DC electrical signal conversion circuit 22;

the voltage detection circuit 50 is configured to detect a voltage of the POE electrical signal, and output an enable signal EN to the DC electrical signal conversion circuit 22 when the voltage of the POE electrical signal reaches a preset voltage, so that the DC electrical signal conversion circuit 22 performs signal conversion on the POE electrical signal and then outputs a DC electrical signal.

It can be understood that the voltage detection circuit 50 in this embodiment is configured to detect the POE voltage output by the POE electrical signal conversion circuit 21, so as to output the enable signal EN to the DC electrical signal conversion circuit 22 and simultaneously output the POE voltage to the DC electrical signal conversion circuit 22 when the POE voltage meets the preset voltage, so that the DC electrical signal conversion circuit 22 performs DC-DC conversion on the POE voltage.

The voltage detection circuit 50 in this embodiment is implemented by a voltage detection chip U19, where the voltage detection chip U19 has an input pin and an enable pin. Specifically, referring to fig. 4, when the input pin of the voltage detection chip U19 receives the POE voltage while the voltage detection chip U19 detects that the POE voltage reaches the preset voltage, the voltage detection chip U19 outputs the enable signal EN to the enable pin of the DC-DC conversion chip U32 through the enable pin. Meanwhile, the input pin of the DC-DC conversion chip U32 receives the POE voltage output by the POE electrical signal conversion circuit 21, and the DC-DC conversion chip U32 outputs 5V voltage, 12V voltage, and 24V voltage through the output pin after DC-DC converting the POE voltage, so as to supply power to an external network device with 5V working voltage, an external network device with 12V working voltage, or an external network device with 24V working voltage.

In one embodiment, the number of the DC electrical signal converting circuits 22 is plural, and plural DC electrical signals of at least one voltage value are outputted from the DC electrical signal converting circuits 22.

It is to be understood that, in the present embodiment, the DC electric signal conversion circuit 22 is provided in plurality, the POE electric signal conversion circuit 21 is provided in plurality, and the input terminals of the plurality of DC electric signal conversion circuits 22 are connected to the plurality of output terminals of the POE electric signal conversion circuit 21. The POE voltage output from the POE electric signal conversion circuit 21 is output to the plurality of DC electric signal conversion circuits 22 through the plurality of output terminals, so that the plurality of DC electric signal conversion circuits 22 convert the POE voltage into a plurality of different DC voltages.

Alternatively, the DC-DC conversion circuit 22 may use the DC-DC conversion chip U32 to realize a function of simultaneously outputting a plurality of power sources. Taking the POE voltage as 48V voltage and the plurality of DC-DC conversion circuits 22 using two DC-DC conversion chips U32 of different types as an example, specifically, the POE electric signal conversion circuit 21 outputs the 48V voltage, the 48V voltage is output to the two DC-DC conversion chips U32 through a plurality of output terminals, and the two DC-DC conversion chips U32 respectively DC-convert the 48V voltage and then output different DC voltages, for example, 24V, 12V or 9V. The outputted plurality of DC voltages may be outputted to a plurality of external network devices via a plurality of signal output terminals 40 to supply power to the plurality of external network devices, thereby realizing a function of simultaneously outputting a plurality of voltages.

In one embodiment, referring to fig. 2, the signal output circuit 30 includes:

a POE electrical signal output circuit 31, wherein an input end of the POE electrical signal output circuit 31 is electrically connected to an output end of the POE electrical signal conversion circuit 21, and an output end of the POE electrical signal output circuit 31 is connected to the signal output end 40; the POE electrical signal output circuit 31 is configured to output the POE electrical signal to the signal output terminal 40;

a DC electrical signal output circuit 32, an input terminal of the DC electrical signal output circuit 32 being electrically connected to an output terminal of the DC electrical signal conversion circuit 22, an output terminal of the DC electrical signal output circuit 32 being connected to another of the signal output terminals 40; the DC electrical signal output circuit 32 is configured to output the DC electrical signal to another of the signal output terminals 40.

It can be understood that, the POE electrical signal output circuit 31 in this embodiment is configured to receive the POE electrical signal output by the POE electrical signal conversion circuit 21, and output the POE electrical signal to the signal output terminal 40, so as to supply power to the external network device; the DC electrical signal output circuit 32 is configured to receive the DC electrical signal output from the DC electrical signal conversion circuit 22 and output the DC electrical signal to the other signal output terminal 42 to supply power to another external network device.

It is understood that the network device includes a POE power supply circuit, and the POE power supply circuit is configured to perform signal conversion on an accessed POE signal and output a POE electrical signal, a DC electrical signal, and a network signal.

When the POE power supply circuit is connected with the external network equipment, namely the network equipment is connected with the external network equipment, the network signal output by the POE power supply circuit can be transmitted to the external network equipment so as to establish communication connection between the network equipment and the external network equipment, and therefore the function of carrying out data transmission between the network equipment and the external network equipment is realized. In addition, the POE power supply circuit of the present utility model is provided with the POE electric signal conversion circuit 21 and the DC electric signal conversion circuit 22. The external network device comprises POE power receiving equipment and direct current power supply equipment, wherein the POE electric signal conversion circuit 21 is connected with the POE power receiving equipment, and the DC electric signal conversion circuit 22 is connected with the direct current power supply equipment to realize single POE signal input and simultaneously output POE electric signal and DC electric signal, namely realize that one POE power supply equipment can supply power for the POE power receiving equipment and the direct current power supply equipment simultaneously.

When the POE power supply circuit is connected with the network monitoring equipment, namely the network equipment is connected with the network monitoring equipment, network signals output by the POE power supply circuit can be transmitted to the network monitoring equipment so as to establish communication connection between the network equipment and the network monitoring equipment, and data information output by the network equipment can be transmitted to the network monitoring equipment so as to provide a function of monitoring the working state of the network equipment in real time for a user;

when the POE power supply circuit is connected with the external network equipment and the network monitoring equipment at the same time, namely, the network equipment is connected with the external network equipment and the network monitoring equipment at the same time, network signals output by the POE power supply circuit can be transmitted to the external network equipment and the network monitoring equipment at the same time so as to establish communication connection between the network equipment and the external network equipment and communication connection between the network equipment and the network monitoring equipment at the same time, thereby not only realizing the data transmission function of the network equipment and the external network equipment, but also realizing the function of monitoring the working state of the network equipment in real time.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims

1. A POE power supply circuit, comprising:

the signal input end is used for inputting POE signals;

the signal output end is used for accessing external network equipment;

2. The POE power supply circuit as recited in claim 1 wherein said POE power supply circuit further comprises:

the network signal output end is used for accessing external network equipment;

3. The POE power supply circuit as recited in claim 2 wherein said signal conversion circuit comprises:

4. The POE power supply circuit as recited in claim 3 wherein said POE power supply circuit further comprises:

5. The POE power supply circuit as recited in claim 3 wherein said network signal conversion circuit comprises:

6. The POE power supply circuit as recited in claim 5 wherein said ethernet switching controllers have a plurality of outputs and said network signal outputs have a plurality of outputs, said outputs of each of said ethernet switching controllers being connected in one-to-one correspondence with each of said network signal outputs.

7. The POE power supply circuit as recited in claim 1 wherein said signal conversion circuit comprises:

8. The POE power supply circuit as recited in claim 7 wherein said signal conversion circuit further comprises:

9. The POE power supply circuit as recited in claim 7 wherein said number of DC electrical signal conversion circuits is plural, said plural DC electrical signal conversion circuits outputting DC electrical signals of at least one voltage value.

10. The POE power supply circuit as recited in claim 1 wherein said signal output circuit comprises:

11. A network device comprising a POE power supply circuit as recited in any one of claims 1 to 10.