CN210839609U

CN210839609U - Anti-reverse-filling circuit device for PSE equipment

Info

Publication number: CN210839609U
Application number: CN202020097908.XU
Authority: CN
Inventors: 郑宇钊
Original assignee: CIG Shanghai Co Ltd
Current assignee: CIG Shanghai Co Ltd
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-06-23
Anticipated expiration: 2030-01-15

Abstract

The utility model discloses a prevent flowing backward circuit arrangement for PSE equipment, it includes PSE power, energy bleed network, MCT network and circuit board, the MCT network is connected to the power positive pole of PSE power via first zero ohm resistance or first diode, the MCT network still is connected to the negative pole of energy bleed network via second zero ohm resistance or second diode; the circuit board is provided with a common pad area which is suitable for selectively welding and arranging a first zero ohm resistor and a second zero ohm resistor or welding and arranging a first diode and a second diode. According to the utility model discloses a prevent flowing backward circuit arrangement for PSE equipment can prevent to flow backward the electric current to the interference of PSE equipment and other PD equipment, avoids leading to the fact harmful effects or damaging equipment to PSE equipment because of voltage flows backward to low cost, help practicing thrift PSE equipment space.

Description

Anti-reverse-filling circuit device for PSE equipment

Technical Field

The utility model relates to a POE equipment especially PSE equipment especially relates to a prevent flowing backward circuit arrangement for PSE equipment.

Background

Because the principle is simple, and the deployment is convenient, POE equipment has been widely used in more and more equipment at present. However, the device manufacturers are too large and have poor quality, which results in a large market spread of many non-standard products. Some non-standard PD (Power Device) products may cause reverse voltage sinking, which may not only cause failure of PSE (Power Sourcing Equipment) devices, but also cause damage to other PD devices.

Therefore, it is desirable to design a low-cost anti-reverse-flow circuit device applicable to PSE equipment.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current PSE equipment and probably cause harmful effects or cause the defect of damage to PSE equipment because of voltage backward irritates, provide a new circuit arrangement is irritated to preventing that is used for PSE equipment.

The utility model discloses a solve above-mentioned technical problem through adopting following technical scheme:

the utility model provides a prevent flowing backward circuit arrangement for PSE equipment, its characterized in that, prevent flowing backward circuit arrangement includes PSE power, energy bleed network, MCT network (being the network transformer center is taken a percentage) and circuit board, the MCT network is connected to via first zero ohm resistance or first diode the power positive pole of PSE power, the MCT network still is connected to via second zero ohm resistance or second diode the negative pole of energy bleed network;

the circuit board is provided with a common pad area adapted to selectively solder and position the first and second zero ohm resistors, or solder and position the first and second diodes.

According to some embodiments of the invention, the power source positive pole of the PSE power source is connected to the protective ground terminal via a plurality of voltage dependent resistors connected in parallel to each other.

According to some embodiments of the invention, the negative pole of the energy bleeding network is connected to the protective earth terminal via a plurality of piezoresistors connected in parallel to each other.

According to some embodiments of the invention, the MCT network is connected to a power supply anode of the PSE power supply via the first diode, the MCT network is further connected to a cathode of the energy bleeding network via the second diode;

wherein the first diode is conducted in a single direction from the MCT network to the anode of the power supply, and the second diode is conducted in a single direction from the cathode of the energy bleed network to the MCT network.

On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.

The utility model discloses an actively advance the effect and lie in:

according to the utility model discloses a prevent flowing backward circuit arrangement for PSE equipment can prevent to flow backward the electric current to the interference of PSE equipment and other PD equipment to avoid leading to the fact harmful effects or damaging equipment to PSE equipment because of voltage flows backward, and low cost, help practicing thrift PSE equipment space.

Drawings

Fig. 1 is a circuit schematic diagram of an anti-reverse-filling circuit arrangement for PSE equipment according to a preferred embodiment of the present invention.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided in conjunction with the accompanying drawings, and the following description is exemplary and not intended to limit the present invention, and any other similar cases will fall within the scope of the present invention.

In the following detailed description, directional terms, such as "left", "right", "upper", "lower", "front", "rear", and the like, are used with reference to the orientation as illustrated in the drawings. The components of the various embodiments of the present invention can be positioned in a number of different orientations and the directional terminology is used for purposes of illustration and is in no way limiting.

Referring to fig. 1, the anti-reverse-filling circuit device for PSE equipment according to the preferred embodiment of the present invention includes a PSE power supply, an energy discharge network, an MCT network and a circuit board, wherein the MCT network is connected to a power supply anode of the PSE power supply via a first zero ohm resistor or a first diode, and the MCT network is further connected to a cathode of the energy discharge network via a second zero ohm resistor or a second diode.

Wherein the circuit board is provided with a common pad area adapted to selectively solder and position the first and second zero ohm resistors, or solder and position the first and second diodes. Therefore, the circuit board can be selectively welded and provided with the resistance element or the diode element according to actual needs, namely, the common pad area can be selectively welded with the resistance element or the diode element, and therefore the pad space on the circuit board can be saved. It should be understood that both resistive and diode elements are shown in the left-hand circuit schematic of fig. 1, but in actual circuit, the two are optional.

It should also be understood that where the voltage of the positive power supply of the PSE power supply is denoted as "RTNPSE," an energy bleed network such as the-48V network illustrated, and an "MCT" terminal represents the MCT network.

Optionally, as shown in fig. 1, the power supply positive electrode of the PSE power supply is connected to a protection ground via a plurality of voltage dependent resistors connected in parallel with each other. Optionally, as shown in fig. 1, the negative electrode of the energy discharge network is connected to the protection ground via a plurality of voltage dependent resistors connected in parallel with each other.

According to some preferred embodiments of the present invention, the MCT network is connected to a power supply anode of the PSE power supply via the first diode, and the MCT network is further connected to a cathode of the energy bleeding network via the second diode.

According to the utility model discloses a prevent flowing backward circuit arrangement for PSE equipment of preferred embodiment to the above-mentioned embodiment of welding and settling diode component is taken as an example, and under normal operating mode, MCT network no voltage, two diodes can not open, and equipment normally works.

When the voltage is reversely poured, the reverse pouring voltage is generated by the PSE equipment, so the voltage is between the output voltage of the anode of the power supply and the voltage of an energy release network such as-48V, the diode cannot be started, and the reverse pouring energy is isolated in the MCT network, namely at the center tap of a network transformer, and cannot affect the PSE equipment and other PD equipment.

In the event of a surge, the energy voltage is either above the positive supply output voltage RTNPSE or below-48V, at which time the diode opens and the voltage is bled off through the circuit of fig. 1.

Alternatively, when it is determined that a standard PD device is used, the diode in the previous embodiment may be replaced with a 0ohm resistor by a common pad adjustment to reduce cost. Accordingly, the common pad design may be, for example, a 0ohm resistive common pad of 1206 package.

Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments can be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications all fall within the scope of the present invention.

Claims

1. An anti-reverse-filling circuit device for PSE equipment is characterized by comprising a PSE power supply, an energy discharge network, an MCT network and a circuit board, wherein the MCT network is connected to the power supply anode of the PSE power supply through a first zero-ohm resistor or a first diode, and is also connected to the cathode of the energy discharge network through a second zero-ohm resistor or a second diode;

2. The anti-reverse-flow circuit arrangement for PSE equipment as recited in claim 1, wherein the power supply positive pole of the PSE power supply is connected to a protection ground via a plurality of voltage dependent resistors connected in parallel with each other.

3. An anti-reverse-flow circuit arrangement for PSE equipment as claimed in claim 1, wherein the negative pole of the energy bleeding network is connected to protection ground via a plurality of voltage dependent resistors connected in parallel to each other.

4. The anti-reverse-flow circuit arrangement for PSE equipment as claimed in claim 1, wherein the MCT network is connected to a power supply anode of the PSE power supply via the first diode, the MCT network being further connected to a cathode of the energy bleeding network via the second diode;