KR20180049882A - HEMP Filter for IP Camera Line - Google Patents

Abstract

The present invention relates to a HEMP filter device for an IP camera line designed to be applicable to the IP camera line to protect an IP camera in a HEMP protection facility from a high altitude electromagnetic pulse (HEMP). The HEMP filter device includes: a signal/power input unit connected to a PoE type UTP cable to primarily cut off a transient current voltage caused by a HEMP pulse by using a gas discharge tube (GDT) when the HEMP pulse is inputted to a signal input terminal of the PoE signal; a filter unit for a PoE Mode B power source, which ultimately shuts off the primary cut-off transient current voltage by using a low-frequency bandpass filter (LPF) and shuts off a high frequency signal to output stable power to a signal/power output unit; a filter unit for PoE Mode A/B signal/power source, which secondarily limits the transient current caused by the HEMP pulse by removing a high frequency component of the PoE signal by using a high speed switching diode, and limits the transient voltage caused by the HEMP pulse by lowering a voltage level of the PoE signal; and a signal/power output unit for outputting the PoE signal having the limited transient current and transient voltage caused by the HEMP pulse to a signal output terminal through the filter unit for the PoE Mode B power source or the filter unit for the PoE Mode A/B signal/power source.

Description

HEMP Filter for IP Camera Line [0002]

The present invention relates to an apparatus for filtering electromagnetic pulses, and more particularly, to an apparatus and method for protecting an IP camera installed in a HEMP protection facility from a high altitude electromagnetic pulse (HEMP) generated by a nuclear explosion To an HEMP filter device for an IP camera line.

Due to the breakthrough in electric, electronic, and communication fields, equipment is composed of various electric / electronic components and semiconductor devices, and is becoming smaller, lighter, and higher performance. As a result, the voltage / current level of the driving power source is gradually lowered, and the signal processing frequency inside the equipment rises from several hundred MHz to several GHz.

Equipment composed of various electrical / electronic components and semiconductor devices may be exposed to electromagnetic pulse (HEMP) generated by high-altitude nuclear explosion of 30 Km or more on the ground, which may cause malfunction or malfunction . Since HEMP has a very wide range of impacts, the national power grid and network equipment can be devastated at the same time, resulting in enormous national harm.

Generally, a device such as a gas discharge tube (GDT) or a metal oxide varistor (MOV) is used in combination to protect a communication device from a surge such as a lightning strike. However, since an Internet-based LAN communication line operating at a high speed usually transmits a high-speed signal of 100 MHz or higher, a device that can be used to protect it from HEMP without attenuating a communication signal is very limited. Korean Patent No. 10-1438122, Discloses a HEMP protection apparatus for a LAN line capable of protecting an apparatus connected to a LAN communication line from an electromagnetic pulse (HEMP) generated by the HEMP.

Many IP cameras installed inside the HEMP protection facility operate using PoE (Power over Ethernet) method. PoE refers to a power supply scheme that does not require a separate power cable by integrating power and data into a single UTP cable infrastructure. Power and data integrated in UTP cable can be transmitted up to 100m in Category 5 / 5e standard.

IP camera inside HEMP protection facility needs HEMP protection measures for IP camera line because high speed signal transmission line suitable for PoE method is required.

However, since the LAN line and the PoE line use different methods, when the existing HEMP filter for the LAN line disclosed in Korean Patent No. 10-1438122 is used for an IP camera using PoE, there arises a problem that the camera does not operate . That is, when the HEMP filter for the LAN line is used, it is impossible to supply power to the IP camera. Therefore, the IP camera does not operate when the IP camera is installed inside the HEMP protection facility.

Therefore, there is a need for a new HEMP filter device for IP camera lines that can protect IP cameras in HEMP protection facilities from high altitude electromagnetic pulses (HEMP) generated by nuclear explosion, but this has not yet been proposed .

Patent Registration No. 10-1438122 (Registered on August 29, 2014)

An object of the present invention is to provide an IP camera line designed to be applicable to an IP camera line so as to protect an IP camera in a HEMP protection facility from a High Altitude Electromagnetic Pulse (HEMP) And a HEMP filter device for use with the HEMP.

According to an aspect of the present invention, there is provided a HEMP filter device for an IP camera line, the HEMP filter device being connected to a PoE-based UTP cable and using a gas discharge tube (GDT) A signal / power input section for firstly interrupting the transient current contact by the HEMP pulse; A filter unit for a PoE Mode B power source for ultimately shutting off the primary cut-off transient voltage using a low-frequency bandpass filter (LPF) and blocking a high-frequency signal to output a stable power to the signal / power output unit; PoE Mode for limiting the transient voltage by HEMP pulse by limiting the transient current by HEMP pulse to the second order by lowering the voltage level of PoE signal by removing the high frequency component of PoE signal by using high-speed switching diode. A filter portion; And a signal / power output unit for outputting a PoE signal having a transient current and a transient voltage limited by the HEMP pulse to the signal output terminal through the filter unit for the PoE Mode B power source or the PoE Mode A / B signal / power source filter unit.

The signal / power input unit includes first and second signal input terminals J1 and J2 connected to DC (+) supply pins (Pin 4 and 5) and DC (-) supply pins (Pin 7 and 8) 1 and J1-2, one side of which is connected to the first and second lines respectively connected to the first and second signal input terminals J1-1 and J1-2, and the other side is connected to the grounded first and second gas discharge tubes GDT1 , GDT2); Third and fourth signal input terminals J2-1 and J2-3 connected to Pin 1 and Pin 2 of the PoE type UTP cable respectively and one side of the third and fourth signal input terminals J2-1 and J2-2 A second input section including third and fourth gas discharge tubes (GDT3, GDT4) connected to the third and fourth lines respectively connected to the other and grounded; And fifth and sixth signal input terminals J3-1 and J3-3 connected to Pin 3 and Pin 6 of the PoE type UTP cable respectively and one end of the fifth and sixth signal input terminals J3-1 and J3-3, And a third input connected to the fifth and sixth lines respectively connected to the fifth and sixth gas discharge tubes GDT5 and GDT6.

The PoE Mode B power supply filter unit includes a plurality of inductors L3, L5, L7, and L9 connected in series to the first line; A plurality of inductors (L4, L6, L8, L10) connected in series to the second line; And one side may be connected to a common connection point between two adjacent inductors on the first line and a common connection point between two adjacent inductors on the second line, and the other side may include a plurality of grounded capacitors (C1 to C6) have.

The PoE Mode A / B signal / power supply filter unit includes first and second resistors (R1 and R2) connected in series to the third and fourth lines (+) to limit current flow; A first common mode inductor L11 connected to the third and fourth line (+) of the first and second resistors R1 and R2 to limit the transient current due to the HEMP pulse; And a second common mode inductor L11 connected to the third and fourth line (+) of the first common mode inductor L11 to limit a voltage of a signal applied to the third and fourth line (+ 1 fast switching diode part; A second common mode inductor (L12) connected to the third and fourth line (+) of the high speed switching diode unit for limiting the transient current due to the HEMP pulse; And a second common mode inductor L12 connected to the third and fourth line (+) of the second common mode inductor L12 to limit a voltage of a signal applied to the third and fourth line (+ 1 switching diode part; A third common mode inductor (L13) connected to the third and fourth line (+) at the rear end of the switching diode to limit the transient current due to the HEMP pulse; Third and fourth resistors (R3, R4) connected in series to the fifth and sixth lines (-) to limit current flow; A fourth common mode inductor L14 connected to the fifth and sixth lines (-) at the rear end of the third and fourth resistors R3 and R4 to limit the transient current due to the HEMP pulse; (-) connected to the fifth and sixth lines (-) of the fourth common mode inductor (L14) to limit a voltage of a signal applied to the fifth and sixth lines (-) to a first level, 2 high speed switching diode part; A fifth common mode inductor (L15) connected to the fifth and sixth lines (-) at the rear end of the high-speed switching diode unit to limit the transient current due to the HEMP pulse; (-) connected to the fifth and sixth lines (-) of the fifth common mode inductor (L15) to limit a voltage of a signal applied to the fifth and sixth lines (-) to a second level, 2 switching diode part; And a sixth common mode inductor L16 connected to the fifth and sixth lines (-) of the rear end of the switching diode to limit the transient current due to HEMP pulses.

When the power is supplied to the first and second switching diode units together with data transmission to Pointers 1, 2, 3 and 6 of the PoE type UTP cable in PoE Mode A, the third and fourth lines (+ (+) And (-) of the power source can be prevented by including the first short-circuit preventing portion and the second short-circuit preventing portion for preventing the short-circuit between the first and sixth lines (-).

A signal / power input unit, a PoE Mode B power source filter unit, a PoE Mode A / B signal / power source filter unit, and a signal / power output unit are separated from each other to shield electromagnetic waves, , A signal / power input unit, a PoE Mode A / B signal / power source filter unit, a PoE Mode B power source filter unit and a signal / power output unit, and a PoE Mode A / B signal / Through capacitors (C7 to C14) and through-type terminals (T1 to T4), which are connected to each other and connected to each other.

As described above, according to the embodiment of the present invention, by adding the HEMP filer for the DC power source, the PoE structure is designed to operate in Mode B, and the POE structure can be operated in Mode A by changing the fast switching diode structure Designed to improve the shielding rate by applying through capacitors instead of through-type terminals on the output side, and designed to operate IP CAMERA with UTP cable without power line, IP CAMERA installed inside HEMP protection facility It is possible to operate with POE method using only UTP cable without power line, and to protect IP CAMERA from high conductive magnetic pulse (HEMP) generated by nuclear explosion.

That is, according to the embodiment of the present invention, when a high-tension conductive magnetic pulse (HEMP) generated by a nuclear explosion is introduced into a UTP cable connected to IPCAMERA, the transient current / voltage due to the HEMP pulse current is effectively limited, By minimizing the impact, it is possible to protect the IP CAMERA installed inside the HEMP protection device. Accordingly, when the HEMP filter for IP CAMERA according to the present invention is installed and operated in the HEMP protection device, it is possible to prevent malfunctions caused by transient voltage / current similar to HEMP and HEMP, and to achieve stable IP CAMERA operation. Also, there is an effect that IP CAEMRA can be connected to POE system by using only UTP cable without power line. It satisfies the PCI test standard of MIL-STD-188125-1.

1 is a block diagram of a HEMP filter device for an IP camera line according to an embodiment of the present invention.
2 is a circuit diagram of a HEMP filter device for an IP camera line according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals are used to denote like elements in the drawings, even if they are shown in different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 is a block diagram of a HEMP filter device for an IP camera line according to an embodiment of the present invention. As shown in the figure, a signal / power input unit 10, a PoE Mode B power source filter unit And a signal / power output unit 40. The PoE mode A / B signal / power filter unit 30 (hereinafter, referred to as a second filter unit)

Many IP cameras installed inside HEMP protection facilities operate using PoE (Power over Ethernet) method, and PoE structure is typically in Mode A and Mode B. Mode A and B commonly use UTP cables Pin 1, 2, 3, and 6 for data transmission. In Mode A, UTP cable pins 1 and 2 are connected to DC (+), pins 3 and 4 are connected to DC (- In Mode B, power supply supplies UTP cables Pin 4 and 5 to DC (+) and pins 7 and 8 to DC (-). As described above, Mode A and Mode B have different pin numbers for supplying power to each other.

The signal / power input unit 10 is connected to a UTP cable of the PoE scheme and firstly cuts off the transient current based on the HEMP pulse by using the gas discharge tube (GDT) when the HEMP pulse is inputted to the signal input terminal of the PoE signal. For example, it includes connections J1 to J3 for connecting UTP cables, grounded gas discharge tubes GDT1 to GDT6, and normal mode inductors L1 and L2 for assisting the operation of the gas discharge tube . Among them, the gas discharge tubes (GDT1 to GDT6) operate when a transient current due to the HEMP pulse is inputted and flow the transient current to the ground. That is, it cuts off the transient current / voltage primarily.

The first filter unit (PoE Mode B power source filter unit) 20 ultimately blocks the transient current voltage that is firstly cut off through the signal / power input unit 10 using a low frequency band pass filter (LPF) For example, a normal mode inductor (L3 to L10) and a capacitor (C1 to C6) to output a stable power to the signal / power output unit 40. The normal mode inductor / Power input unit 10 to prevent the transient current and the voltage that are primarily cut off from being exceeded by 0.1 A so as to satisfy the PCI test standard of MIL-STD-188-125-1 . In addition, a low-pass filter circuit blocks a radio frequency (RF) signal and provides a stable power supply to the signal / power output unit 40.

The second filter unit (PoE Mode A / B signal / power source filter unit) 30 removes the high frequency component of the PoE signal using the high-speed switching diode to limit the transient current due to the HEMP pulse to the second level, For example, resistors R1 to 4, common mode inductors (L11 to L16), and a high-speed switching diode to limit the transient voltage due to the HEMP pulse, The transient current and voltage that are primarily cut off through the power input unit 10 are finally cut off and the current does not exceed 0.1 A to fulfill the PCI test standard of MIL-STD-188-125-1. In addition, the HEMP pulse can be effectively removed, so that the communication speed of the 100Mbps level can be transmitted without distortion. In addition, the common mode inductors L11 to L16 can function to block electromagnetic waves other than the signal to be used.

The signal / power output unit 40 is for outputting a PoE signal having a transient current and a transient voltage limited by the HEMP pulse to the signal output terminal through the first filter unit 20 or the second filter unit 30, (J4 to J6) for connecting the UTP cable, and the connectors (J4 to J6) can serve to connect the UTP cable to the IP CAMERA.

2 is a circuit diagram of a HEMP filter device for an IP camera line according to an embodiment of the present invention. The signal / power input section 10, the PoE Mode B power source filter section (hereinafter referred to as a first filter section) 20 ), A PoE Mode A / B signal / power supply filter unit (hereinafter referred to as a second filter unit) 30, and a signal / power output unit 40.

The signal / power input unit 10 may include a first input unit 11, a second input unit 12, and a third input unit 13.

The first input unit 11 includes first and second signal input terminals J1 and J2 connected to DC (+) supply pins (Pin 4 and 5) and DC (-) supply pins (Pin 7 and 8) 1 and J1-2 and one side is connected to the first and second lines 1 and 2 respectively connected to the first and second signal input terminals J1-1 and J1-2, One end is connected to the common connection point between the gas discharge tubes GDT1 and GDT2 and the first signal input terminal J1-1 on the first line 1 and the first gas discharge tube GDT1, One end is connected to the common connection point of the second signal input terminal J1-2 and the second gas discharge tube GDT2 on the second line 2 and the other end is connected to the inductor L3 of the second line 2, And a normal mode inductor L2 connected to the inductor L4 of the first filter unit 20. [

The second input unit 12 includes third and fourth signal input terminals J2-1 and J2-3 connected to Pin 1 and Pin 2 of the PoE type UTP cable, And third and fourth gas discharge tubes (GDT3, GDT4) connected to the third and fourth lines (3,4) respectively connected to the first, second, and J2-2.

The third input unit 13 includes fifth and sixth signal input terminals J3-1 and J3-3 connected to the Pin 3 and Pin 6 of the PoE type UTP cable and one end of the fifth and sixth signal input terminals J3-1 , And J3-3, respectively, and the other end of the fifth and sixth gas discharge tubes GDT5 and GDT6 may be grounded.

The first filter unit (PoE Mode B power source filter unit) 20 is connected to the first and second lines 1 and 2 at the rear end of the first input unit 11 to ultimately block transient voltages and currents A plurality of inductors L3, L5, L7 and L9 connected in series with the first line 1, a plurality of inductors L4, L6, L8 and L10 connected in series with the second line 2, L6, L6, L8 and L8 on the second line 2 and the common connection point between the two adjacent inductors L3 and L5, L5 and L7, L7 and L9 on the first line 1, And L10, and the other side may include a plurality of grounded capacitors C1 to C6.

The second filter unit (PoE Mode A / B signal / power supply filter unit) 30 is connected on the third and fourth lines 3 and 4 at the rear end of the second input unit 12 to finally output a transient voltage and a current (2-1) for interrupting the transient voltage and current, and a second (2-1) filter section (30-1) for blocking the transient voltage and current, connected on the fifth and sixth lines -2 filter unit 30-2.

The second-1 filter unit 30-1 includes first and second resistors R1 and R2 connected in series to the third and fourth lines (+) and (3,4) to limit current flow, A first common mode inductor L11 connected to the third and fourth lines (+) (3,4) on the rear side of the two resistors R1 and R2 to limit the transient current due to HEMP pulses, (+) (3,4) of the rear end of the first and second lines (L11) and (L11) to limit a voltage of a signal applied to the third and fourth lines (3), (3,4) at the rear end of the first high-speed switching diode section (31) to limit the transient current due to HEMP pulses, and a second common The mode inductor L12 and the signal connected to the third and fourth line (+) (3,4) at the rear end of the second common mode inductor L12 and connected to the third and fourth line (+ A first switching diode section 32 composed of a plurality of diodes for limiting the voltage to a second level, And a third common mode inductor L13 connected to the third and fourth lines (+) 3, 4 to limit the transient current due to the HEMP pulse.

The 2 nd -th filter section 30-2 includes third and fourth resistors R3 and R4 connected in series to the fifth and sixth lines (-) 5 and 6 to limit current flow, A fourth common mode inductor L14 connected to the fifth and sixth lines (-) 5 and 6 at the rear ends of the four resistors R3 and R4 to limit the transient current due to the HEMP pulse, (-) 5, 6 at the rear end of the first to sixth lines (- L14, L14) to limit the voltage of the signal applied to the fifth and sixth lines (5) and (6) at the rear end of the high-speed switching diode section 33 to limit the transient current due to HEMP pulses, and a fifth common mode inductor (-) 5 and 6 on the rear end of the fifth common mode inductor L15 to limit the voltage of the signal applied to the fifth and sixth lines (-) to the second level A second switching diode section 34 composed of a plurality of diodes, and a sixth switching diode section 34 arranged at the rear end of the second switching diode section 34, And a sixth common mode inductor L16 connected to the negative (-) terminals 5 and 6 to limit the transient current due to the HEMP pulse.

When power is supplied to the first and second switching diode units 32 and 34 in the PoE mode A together with the data transmission to the pins 1, 2, 3 and 6 of the PoE type UTP cable, The first short-circuit prevention part 32-1 and the second short-circuit prevention part 34-1 for preventing a short circuit between the positive (+) terminals 3, 4 and the fifth and sixth lines (-) 5, The first switching diode unit 32 and the second switching diode unit 34 are simultaneously grounded and prevented from being short-circuited when the first and second switching diode units 32 and 34 are switched, It is possible to prevent (+) and (-) from being short-circuited.

The signal / power output unit 40 may include a first output unit 41, a second output unit 42, and a third output unit 43.

The first output unit 41 corresponds to the first and second signal input terminals J1-1 and J1-2 of the first signal input unit 11 and is connected to the DC (+) supply pin (Pin 4 The first and second signal output terminals J4-1 and J4-2 formed at the output terminals of the first and second lines 1 and 2 are connected to the DC (-) supply pins (Pin 7 and 8) .

The second output unit 42 corresponds to the third and fourth signal input terminals J2-1 and J2-3 of the second signal input unit 12 and is connected to Pin 1 and Pin 2 of the PoE type UTP cable, And third and fourth signal output terminals J5-1 and J5-3 formed at the output ends of the third and fourth lines 3 and 4, respectively.

The third output unit 43 corresponds to the fifth and sixth signal input terminals J3-1 and J3-3 of the third signal input unit 13 and is connected to Pin 3 and Pin 6 of the PoE type UTP cable, And a fifth and sixth signal output terminals J6-1 and J6-3 formed at the output terminals of the fifth and sixth lines 5 and 6, respectively.

(PoE Mode A / B signal / power source filter unit) 30, and a second filter unit (PoE Mode A / B signal / power source filter unit) The signal / power output unit 40 may be formed to be shielded from electromagnetic waves by being separated from each other.

The signal / power input unit 10 and the second filter unit (PoE Mode A / B signal / power source filter 10) are connected between the signal / power input unit 10 and the first filter unit (PoE Mode B power source filter unit) (PoE Mode A / B signal / power source filter) 20 between the first filter unit (PoE Mode B power source filter unit) 20 and the signal / power output unit 40 and between the second filter unit Through capacitors (C7 to C14) and through-type terminals (T1 to T4) for connecting and connecting the wired lines (1 to 6), respectively, between the signal / power output section (40) As shown in FIG.

The fast switching diode units 31 and 33 have different bias directions. The high-speed switching diodes 31 and 33 may be formed of, for example, two serial connections and serve to turn-on when the HEMP pulse is input. The threshold voltage of the two diodes (0.7V) prevents the voltage across the line from exceeding 1.4V. This limits the transient voltage by the HEMP.

The switching diode portions 32 and 34 have different bias directions. The switching diodes 32 and 34 may be configured, for example, in such a manner that diodes connected in parallel to each other are connected in series and turn-on when the HEMP pulse is input. This limits the transient voltage by the HEMP. In addition, it protects UTP cable pins 1, 2, 3, and 6 from shorting (+) and (-) when power is supplied together with data transmission in Mode A.

According to the present embodiment, the first filter unit (PoE Mode B power supply filter unit) 20 and the second filter unit (PoE Mode A / B filter unit) 30 are shielded from each other so as not to interfere with each other, (PoE Mode B power supply filter unit) 20, a signal / power input unit 10 and a second filter unit (PoE Mode A / B filter unit) 30 are separated from each other, And pass through the through-type terminals T1 to T4 and through-type capacitors C7 to C8 to transmit signals and power.

(PoE Mode B power supply filter unit) 20, a signal / power input unit 40, a second filter unit (PoE Mode A / B filter unit) 30, and a signal / The input unit 40 is separated from each other to shield electromagnetic waves, and the through capacitors C9 to C14 pass through to transmit signals and power. Also, it plays a role of improving the shielding performance of the filter due to the application of the through-type capacitor.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: signal / power input section
20: PoE Mode B power supply filter unit (first filter unit)
30: PoE Mode A / B signal / power supply filter unit (second filter unit)
40: signal / power output section

Claims (7)

A signal / power input unit for firstly interrupting the transient current contact by the HEMP pulse using the gas discharge tube (GDT) when the HEMP pulse is inputted to the signal input terminal of the PoE signal;
A filter unit for a PoE Mode B power source for ultimately shutting off the primary cut-off transient voltage using a low-frequency bandpass filter (LPF) and blocking a high-frequency signal to output a stable power to the signal / power output unit;
PoE Mode for limiting the transient voltage by HEMP pulse by limiting the transient current by HEMP pulse to the second order by lowering the voltage level of PoE signal by removing the high frequency component of PoE signal by using high-speed switching diode. A filter portion; And
A signal / power output unit for outputting a PoE signal having a transient current and a transient voltage limited by the HEMP pulse to the signal output terminal through the PoE Mode B power source filter unit or the PoE Mode A / B signal / power source filter unit;
And a HEMP filter device for an IP camera line. The method according to claim 1,
The signal / power input unit includes:
(J1-1, J1-2) connected to the DC (+) supply pins (Pin 4, 5) and DC (-) supply pins (Pin 7, 8) of the PoE type UTP cable (GDT1, GDT2) connected to the first and second lines respectively connected to the first and second signal input terminals (J1-1, J1-2) and grounded on the other side, 1 input section;
Third and fourth signal input terminals J2-1 and J2-3 connected to Pin 1 and Pin 2 of the PoE type UTP cable respectively and one side of the third and fourth signal input terminals J2-1 and J2-2 A second input section including third and fourth gas discharge tubes (GDT3, GDT4) connected to the third and fourth lines respectively connected to the other and grounded; And
A fifth and sixth signal input terminals J3-1 and J3-3 connected to Pin 3 and Pin 6 of the PoE type UTP cable respectively and one end of which is connected to the fifth and sixth signal input terminals J3-1 and J3-3 And a third input unit including a fifth and a sixth gas discharge tube (GDT5, GDT6) connected to the fifth and sixth lines, respectively, and the other end is grounded. 3. The method of claim 2,
In the PoE Mode B power source filter unit,
A plurality of inductors (L3, L5, L7, L9) connected in series to the first line;
A plurality of inductors (L4, L6, L8, L10) connected in series to the second line; And
One side of which is connected to a common connection point between two adjacent inductors on the first line and a common connection point between two adjacent inductors on the second line and the other side is grounded with a plurality of capacitors C1 to C6 Features HEMP filter device for IP camera line. 3. The method of claim 2,
The PoE Mode A / B signal /
First and second resistors (R1 and R2) connected in series to the third and fourth lines (+) to limit current flow;
A first common mode inductor L11 connected to the third and fourth line (+) of the first and second resistors R1 and R2 to limit the transient current due to the HEMP pulse;
And a second common mode inductor L11 connected to the third and fourth line (+) of the first common mode inductor L11 to limit a voltage of a signal applied to the third and fourth line (+ 1 fast switching diode part;
A second common mode inductor (L12) connected to the third and fourth line (+) of the high speed switching diode unit for limiting the transient current due to the HEMP pulse;
And a second common mode inductor L12 connected to the third and fourth line (+) of the second common mode inductor L12 to limit a voltage of a signal applied to the third and fourth line (+ 1 switching diode part;
A third common mode inductor (L13) connected to the third and fourth line (+) at the rear end of the switching diode to limit the transient current due to the HEMP pulse;
Third and fourth resistors (R3, R4) connected in series to the fifth and sixth lines (-) to limit current flow;
A fourth common mode inductor L14 connected to the fifth and sixth lines (-) at the rear end of the third and fourth resistors R3 and R4 to limit the transient current due to the HEMP pulse;
(-) connected to the fifth and sixth lines (-) of the fourth common mode inductor (L14) to limit a voltage of a signal applied to the fifth and sixth lines (-) to a first level, 2 high speed switching diode part;
A fifth common mode inductor (L15) connected to the fifth and sixth lines (-) at the rear end of the high-speed switching diode unit to limit the transient current due to the HEMP pulse;
(-) connected to the fifth and sixth lines (-) of the fifth common mode inductor (L15) to limit a voltage of a signal applied to the fifth and sixth lines (-) to a second level, 2 switching diode part; And
And a sixth common mode inductor (L16) connected to the fifth and sixth lines (-) of the rear end of the switching diode to limit the transient current due to the HEMP pulse. . 5. The method of claim 4,
When the first and second switching diode units are supplied with data and power to pins 1, 2, 3 and 6 of the PoE type UTP cable in PoE Mode A, the third and fourth lines (+ (+) And (-) are prevented from being short-circuited by including a first short-circuit prevention portion and a second short-circuit prevention portion for preventing a short circuit between the lines (5) and (6) HEMP filter device. The method according to claim 1,
The signal / power input unit, the PoE Mode B power source filter unit, the PoE Mode A / B signal / power source filter unit, and the signal / power output unit are separated from each other to shield the electromagnetic wave. The method according to claim 6,
Signal / Power Input and PoE Mode B Filter, Signal / Power Input, PoE Mode A / B Signal / Power Filter, PoE Mode B Power Filter, Signal / Power Output and PoE Mode A / B Signal / Power The filter unit and the signal / power output unit are connected to each other through through-type capacitors (C7 to C14) and through-type terminals (T1 to T4) for interconnecting the wired lines to conduct electricity. .

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