CN114221313B - Protection system and floating equipment - Google Patents

Protection system and floating equipment Download PDF

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Publication number
CN114221313B
CN114221313B CN202111485204.5A CN202111485204A CN114221313B CN 114221313 B CN114221313 B CN 114221313B CN 202111485204 A CN202111485204 A CN 202111485204A CN 114221313 B CN114221313 B CN 114221313B
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China
Prior art keywords
port
isolation
isolated
discharge tube
communication interface
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CN114221313A (en
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张绪坤
黄焕彬
沈万甫
涂久佳
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Shenzhen Gongjin Electronics Co Ltd
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Shenzhen Gongjin Electronics Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H02H9/021—Current limitation using saturable reactors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The application discloses a protection system and floating equipment, and belongs to the technical field of electronics. The protection system has at least two of the following ports: the system comprises a plurality of isolation ports, a first non-isolation port and a second non-isolation port, wherein at least one isolation port in the plurality of isolation ports is connected with a public end through a first protection circuit, the first non-isolation port is connected with the public end, and the second non-isolation port is connected with the public end through a second protection circuit. The first protection circuit is used for guiding the surge current input to the isolation port to the conductive end, and the conductive end is the first protection circuit, the second protection circuit or the first non-isolation port connected with the second isolation port. And/or the second protection circuit is used for guiding the surge current input to the second non-isolated port to the conductive end, or the first non-isolated port is used for guiding the input surge current to the conductive end. The conductive terminal is used to direct the surge current to the loop terminal. The application prevents the interior of the floating equipment from being damaged by surge current through the protection circuit.

Description

Protection system and floating equipment
Technical Field
The application relates to the technical field of electronics, in particular to a protection system and floating equipment.
Background
Currently, in electronic communication devices, a great deal of application is made to floating technology. The floating ground, i.e. the ground of the circuit is connected with the earth without a conductor, has the advantages that the circuit is not influenced by the earth electric property, and the isolation resistance between the power ground (strong electric ground) and the signal ground (weak electric ground) is large, so that the electromagnetic interference generated by the circuit coupling of the common ground impedance can be prevented. However, there is still a certain risk of floating in the event of a surge, and thus protective measures are required in the equipment to which the floating technology is applied.
Disclosure of Invention
The application provides a protection system and floating equipment, which are used for preventing electronic components in the floating equipment from being damaged by surge voltage.
In the prior art, surge is prevented through the insulation pressure resistance of the isolation port, but in a relatively severe high surge voltage area, the insulation protection of the isolation port is easy to break down, so that the electronic components in the floating equipment can be damaged by the surge current. Therefore, a reliable protection scheme is needed to lead out the high-current surge signal generated by the surge voltage so as to protect equipment.
The technical scheme is as follows:
in a first aspect, an isolation system is provided, the system having at least two of the following ports: the device comprises a plurality of isolation ports, a first non-isolation port and a second non-isolation port, wherein at least one isolation port among the isolation ports is connected with a public end through a first protection circuit, the first non-isolation port is connected with the public end, and the second non-isolation port is connected with the public end through a second protection circuit.
The first protection circuit connected with the first isolation port is used for guiding surge current generated by surge voltage input to the first isolation port to the conducting end, the conducting end is used for guiding the surge current to the loop end, the conducting end is the first protection circuit connected with the second isolation port, or the conducting end is the second protection circuit, or the conducting end is the first non-isolation port, and the first isolation port and the second isolation port belong to a plurality of isolation ports.
And/or the second protection circuit is used for guiding the surge current generated by the surge voltage input to the second non-isolated port to the conductive end, the conductive end is used for guiding the surge current from the second protection circuit, or the first non-isolated port is used for guiding the surge current generated by the surge voltage input to the first non-isolated port to the conductive end, and the conductive end is used for guiding the surge current to the loop end.
According to the application, through designing corresponding protection circuits for a plurality of ports in the system, when surge current generated by surge voltage flows in from one isolated port (such as a first isolated port) of the floating equipment, the first isolated port guides the surge current to the conducting end through the connected first protection circuit, the conducting end guides the surge current to the loop end, and/or when the surge current generated by the surge voltage flows in from one non-isolated port (such as a second non-isolated port) of the floating equipment, the second non-isolated port guides the surge current to the conducting end through the connected second protection circuit, so that the surge current is guided to the loop end through the conducting end, and the internal electronic components are prevented from being damaged by the surge current passing through the internal circuit, thereby achieving the purpose of protecting the internal circuit of the floating equipment.
In one possible implementation manner of the present application, the conductive terminal is the first protection circuit connected to a second isolation port, the first isolation port and the second isolation port have the same structure, and the first protection circuit includes: the first end of the first protection device is connected with the first isolation port, the second end of the first protection device is connected with the public end, and the first protection device is a gas discharge tube or a piezoresistor.
Or, the first isolation port and the second isolation port are different in structure, and the first protection circuit to which the first isolation port is connected includes: the first gas discharge tube with the first end of second gas discharge tube is connected respectively first isolation port, first gas discharge tube with the second end of second gas discharge tube is connected the common end, the second isolation port is connected first protection circuit includes: and the first end of the first protection device is connected with the second isolation port, and the second end of the first protection device is connected with the public end.
Optionally, the isolation port includes a first communication interface and an isolation module, where the isolation module connects a chip connection inside a floating device to which the protection system is applicable to the first communication port. Under the condition that the structures of the first isolation port and the second isolation port are the same, the isolation module included in the first isolation port is connected with the first end of the first protection device corresponding to the first isolation port, and the isolation module included in the second isolation port is connected with the first end of the first protection device corresponding to the second isolation port. Or, the structures of the first isolation port and the second isolation port are different, the isolation module included in the first isolation port is connected with the first ends of the first gas discharge tube and the second gas discharge tube, and the isolation module included in the second isolation port is connected with the first end of the first protection device corresponding to the second isolation port.
Optionally, when the structures of the first isolation port and the second isolation port are the same, the isolation module included in the first isolation port and the second isolation port is a first network transformer, a primary coil of the first network transformer has a center tap, a first end of the first protection device is connected to the center tap, and the primary coil is connected to the first communication interface.
Under the condition that the structures of the first isolation port and the second isolation port are different, the isolation module included in the first isolation port is a second network transformer, the second network transformer comprises a primary coil set connected with the second communication interface, the primary coil set comprises a capacitor, coils connected to two ends of the capacitor, the first end of the first gas discharge tube is connected with one coil, and the first end of the second gas discharge tube is connected with the other coil. The isolation module included in the second isolation port is a first network transformer.
Optionally, in the case that the first isolation port and the second isolation port have the same structure, the first communication interface included in the first isolation port is one of a WAN port and a LAN port, and the first communication interface included in the second isolation port is the other one of the WAN port and the LAN port.
And under the condition that the structures of the first isolation port and the second isolation port are different, the first communication interface included in the first isolation port is a DSL port, and the first communication interface included in the second isolation port is one of a WAN port and a LAN port.
In one possible implementation manner of the present application, the second protection circuit includes: the first ends of the first semiconductor discharge tube and the second semiconductor discharge tube are respectively connected with the second non-isolated port, and the second ends of the first semiconductor discharge tube and the second semiconductor discharge tube are connected with the common end.
In one possible implementation manner of the present application, the conductive end is the second protection circuit, and the first communication interface included in the first isolation port is one of a DSL port, a WAN port, and a LAN port.
The second non-isolated port comprises a second communication interface which is connected with a chip in floating equipment suitable for the protection system.
In one possible implementation manner of the present application, in a case where the plurality of isolated ports includes the first isolated port, the first isolated port is an external isolated port of a floating device to which the protection system is applied. Or, the second non-isolation port is an external isolation port of floating equipment to which the protection system is applicable.
In one possible implementation manner of the present application, the second protection circuit connected to the second non-isolated port is configured to direct the surge voltage input to the second non-isolated port to the first non-isolated port, where the first non-isolated port includes a third communication interface, and the third communication interface is connected to a chip inside the floating device. The second communication interface included in the second non-isolated port is an FXS port.
In a second aspect, there is provided a floating installation comprising the isolation system of the first aspect.
It will be appreciated that the benefits of the second aspect may be found in the related description of the first aspect, and are not described in detail herein.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a floating device according to an embodiment of the present application;
FIG. 2 is a schematic view of a floating device according to an embodiment of the present application;
FIG. 3 is a schematic illustration of a protection scheme for isolated ports in a floating facility according to an embodiment of the present application;
FIG. 4 is a schematic illustration of a protection scheme for isolated ports in a floating facility according to an embodiment of the present application;
FIG. 5 is a schematic illustration of a protection scheme for isolated and non-isolated ports in a floating facility according to an embodiment of the present application;
FIG. 6 is a schematic illustration of a protection scheme for isolated and non-isolated ports in a floating facility according to an embodiment of the present application;
fig. 7 is a protection scheme of a non-isolated port and a non-isolated port in a floating device according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.
It should be understood that references to "a plurality" in this disclosure refer to two or more. In the description of the present application, "/" means or, unless otherwise indicated, for example, A/B may represent A or B; "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, in order to facilitate the clear description of the technical solution of the present application, the words "first", "second", etc. are used to distinguish the same item or similar items having substantially the same function and function. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ.
Before explaining the embodiment of the present application in detail, an application scenario of the embodiment of the present application is described.
Currently, in electronic communication devices, a great deal of application is made to floating technology. Devices employing floating technology can prevent electromagnetic interference from common-ground impedance circuit-based coupling. However, when a surge occurs, there is still a risk of the floating installation, and thus, protective measures are required in the floating installation. The general floating equipment can be provided with an isolation port, and the purpose of surge protection is achieved by means of the insulation and pressure resistance of the isolation port. But in a relatively severe high surge voltage region, the insulation protection of the isolated port is unstable, and when insulation breaks down, the circuit through which the surge current passes will be entirely damaged.
Therefore, the embodiment of the application provides a protection system, which achieves the effect of protecting equipment by connecting different anti-surge protection devices in the ports of the equipment and leading out a large-current surge signal generated by surge voltage.
The protection system provided by the embodiment of the application is explained in detail below.
The embodiment of the application provides a protection system suitable for floating equipment, which is provided with at least two of the following ports: the system comprises a plurality of isolation ports, a first non-isolation port and a second non-isolation port, wherein at least one isolation port in the plurality of isolation ports is connected with a public end GND through a first protection circuit, the first non-isolation port is connected with the public end GND, and the second non-isolation port is connected with the public end GND through a second protection circuit. The first protection circuit connected with the first isolation port is used for guiding surge current generated by surge voltage input to the first isolation port to the conducting end, the conducting end is used for guiding the surge current to the loop end, the conducting end is the first protection circuit connected with the second isolation port, or the conducting end is the second protection circuit, or the conducting end is the first non-isolation port, and the first isolation port and the second isolation port belong to a plurality of isolation ports.
According to the application, through designing corresponding protection circuits for a plurality of ports in the floating equipment, when surge current generated by surge voltage flows in from one isolated port (such as a first isolated port) of the floating equipment, the first isolated port guides the surge current to the conducting end through the connected first protection circuit, the conducting end guides the surge current to the loop end, and/or when the surge current generated by the surge voltage flows in from one non-isolated port (such as a second non-isolated port) of the floating equipment, the second non-isolated port guides the surge current to the conducting end through the connected second protection circuit, so that the surge current is guided to the loop end through the conducting end, and the internal electronic components are prevented from being damaged by the surge current passing through the internal circuit, thereby achieving the purpose of protecting the internal circuit of the floating equipment.
In one possible implementation manner of the present application, since the communication interface exposed outside the floating device has a higher possibility of being directly or indirectly hit by lightning outside in a severe environment, or a higher possibility of inducing a high voltage in the moment of lightning strike, in the embodiment of the present application, a port (which may be an isolated port or a non-isolated port) that receives a surge voltage from outside may be regarded as a port corresponding to the communication interface located outside the floating device. Alternatively, the port (which may be an isolated port or a non-isolated port) that directs the surge voltage to the conductive terminal may be regarded as a port corresponding to a communication interface located outside the floating device, or may be a port corresponding to an internal communication interface. Whichever arrangement, the communication interface corresponding to the port that directs the surge voltage to the conductive terminal is connected to the loop terminal when implemented.
The loop terminal may be directly connected to the ground, or may finally guide the current to the ground through parasitic capacitance or inductance.
The common terminal GND is a ground terminal inside the floating device, and is not connected to the ground, and is not affected by the ground electrical property. As an example, the common end GND of the floating device may be a metal seal case.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a floating device according to an embodiment of the present application. Referring to fig. 1, the apparatus includes: wide area network (Wide Area Network, WAN) ports, local area network (Local Area Network, LAN) ports, universal serial bus (Universal Serial Bus, USB) ports, external switching station (Foreign Exchange Station, FXS) ports, digital subscriber line (Digital Subscriber Line, DSL) ports, isolated port 201, isolated port 202, isolated port 203, network transformer T1, network transformer T2, network transformer T3, resistor R1, resistor R2, capacitor C1, capacitor C2, gas discharge tube GDT1, gas discharge tube GDT2, gas discharge tube GDT3, gas discharge tube GDT4, semiconductor discharge tube TSS1, semiconductor discharge tube TSS2, and chipset 101.
The primary winding of the network transformer T1 is connected to the WAN port, and the secondary winding is connected to the chipset 101. The center tap of the primary coil of the network transformer T1 is connected with the first end of a resistor R1, the second end of the resistor R1 is connected with the first end of a capacitor C1, and the second end of the capacitor C1 is connected with a common end GND. The primary winding of the network transformer T2 is connected to the LAN port and the secondary winding is connected to the chipset 101. The center tap of the primary coil of the network transformer T2 is connected with the first end of a resistor R2, the second end of the resistor R2 is connected with the first end of a capacitor C2, and the second end of the capacitor C2 is connected with a common end GND. The USB port is connected to the chipset 101. The FXS port is connected with the chip set 101, the first end of the semiconductor discharge tube TSS1 is connected with the first end of the FXS port, the second end of the semiconductor discharge tube TSS1 is connected with the common end GND, the first end of the semiconductor discharge tube TSS2 is connected with the second end of the FXS port, and the second end of the semiconductor discharge tube TSS2 is connected with the common end GND; the primary coil of the network transformer T3 is connected to the DSL port, the secondary coil is connected to the chipset 101, the first end of the gas discharge tube GDT3 is connected to the first end of the primary coil of the network transformer T3, the second end of the gas discharge tube GDT3 is connected to the common end GND, the first end of the gas discharge tube GDT4 is connected to the second end of the primary coil of the network transformer T3, and the second end of the gas discharge tube GDT4 is connected to the common end GND.
The chipset 101 includes a plurality of Chip modules, such as a first Chip network single Chip (LAN Chip) U1, a second Chip central processing unit (Central Processing Unit, CPU) U2, a third Chip Driver (Line Driver) U3, and a fourth Chip Physical Layer (PHY) U4, and fig. 2 is different from fig. 1 in that: the primary coil of the network transformer T1 is connected with the WAN port, and the secondary coil is connected with the first chip U1. The primary winding of the network transformer T2 is connected to the LAN port and the secondary winding is connected to the second chip U2 in the chipset 101. The USB port is directly connected to the second chip U2 in the chipset 101. The FXS port connects to the third chip U3 in the chipset 101. The primary coil of the network transformer T3 is connected with the DSL port, and the secondary coil is connected with a fourth chip U4 in the chip set 101; the first chip U1 is connected with the second chip U2, the third chip U3 is connected with the second chip U2, and the fourth chip U4 is connected with the second chip U2.
It should be noted that the components inside the floating device shown in fig. 1 and 2 are only one illustration, and in practice, the components in the floating device may be fewer than those shown in fig. 1 and 2 or redundant to those shown in fig. 1 and 2.
The isolation port refers to that the chip and the communication interface corresponding to the chip are connected by adopting an isolation module (such as a network transformer) so as to achieve the purpose of isolating the communication interface and the chip.
As an example, the structure of the floating device may be as shown in fig. 1 or 2, and the plurality of isolated ports may include an isolated port 201, an isolated port 202, and an isolated port 203, respectively. Each isolated port in embodiments of the present application may include a first communication interface and an isolation module (e.g., a network transformer). For example, the isolation port 201 includes a first communication interface (e.g., a WAN port) and a network transformer T1 coupled to the first communication interface, the isolation port 202 includes a first communication interface (e.g., a LAN port) and a network transformer T2 coupled to the first communication interface, and the isolation port 203 includes a communication interface (e.g., a DSL port) and a network transformer T3 coupled to the communication interface.
The non-isolated port refers to that the chip and the corresponding communication interface of the chip are connected by adopting communication wiring or directly connected, i.e. the chip and the communication interface are not connected by an isolated module. As an example, the floating device may be configured as shown in fig. 1 or fig. 2, and accordingly, taking the communication interface as a USB port, the chip module as an example of a CPU, and the first non-isolated port may include a USB port, where the USB port is connected to the CPU chip.
In one possible implementation of the present application, there may be a plurality of isolated ports, each of which is connected to the common terminal GND through a first protection circuit. For example, in connection with fig. 1 or fig. 2, the isolation port 201, the isolation port 202, and the isolation port 203 are respectively connected to a first protection circuit (i.e., a first protection device, a first gas discharge tube, and a second gas discharge tube), where the first protection device is a gas discharge tube GDT1 or a gas discharge tube GDT2, the first gas discharge tube is a gas discharge tube GDT3, and the second gas discharge tube is a gas discharge tube GDT 4.
It should be noted that, when there is one isolated port connected to the first protection circuit among the plurality of isolated ports, in order to derive the surge voltage received by the isolated port, the floating device needs to be provided with a first non-isolated port or a second non-isolated port, and then the surge voltage protection of the floating device can be regarded as an isolated versus non-isolated protection.
In one possible embodiment of the present application, when two isolated ports of the plurality of isolated ports are respectively connected to the first protection circuit, the case where the surge voltage is introduced from one isolated port and is introduced through the protection circuit to which the other isolated port is connected, may be regarded as an isolated-to-isolated protection.
In one possible embodiment of the present application, when two isolated ports of the plurality of isolated ports are respectively connected to the first protection circuit, the second non-isolated port of the floating device may or may not be connected to the second protection circuit. In the case where the second non-isolated port is connected to the second protection circuit, the floating device may then direct the surge voltage received by the second non-isolated port through the second protection circuit to the first non-isolated port, which may be considered as non-isolated versus non-isolated protection.
It should be noted that the protection measure adopted by the floating device in actual use may depend on the structure of the floating device, for example, if the floating device has a plurality of isolated ports, but does not have non-isolated ports, isolation-to-isolation protection may be adopted. Non-isolated versus non-isolated protection may be employed if the floating device has a first non-isolated port and a second non-isolated port, but no isolated port.
Since the communication interfaces corresponding to the first isolation port and the second isolation port are different in different situations, the communication interfaces corresponding to the respective isolation ports in different situations will be described below.
Case 1
In one possible implementation manner of the present application, in a case where a first protection circuit to which a first isolation port is connected is used to guide a surge voltage input to the first isolation port to the first protection circuit to which a second isolation port is connected, the first isolation port and the second isolation port are identical in structure, the first protection circuit includes: the gas discharge tube GDT1, the first end of the gas discharge tube GDT1 is connected with the first isolation port, and the second end is connected with the common end GND. The first communication interface included in the first isolated port may be a WAN port and the first communication interface included in the second isolated port may be a LAN port. Or the first communication interface comprised by the first isolated port may be a LAN port and the first communication interface comprised by the second isolated port may be a WAN port. In one possible implementation, the first isolated port may include a first communication interface that is an external communication interface of the floating device. The first communication interface included in the second isolation port may be an external communication interface or an internal communication interface of the floating device. Illustratively, the WAN port typically serves as an external communication interface for the floating device, while the LAN port may serve as an internal communication interface for the floating device.
Case 2
In one possible implementation manner of the present application, in a case where a first protection circuit to which a first isolation port is connected is used to guide a surge voltage input to the first isolation port to the first protection circuit to which a second isolation port is connected, structures of the first isolation port and the second isolation port are different, the first protection circuit to which the first isolation port is connected includes: the first gas discharge tube GDT3 and the second gas discharge tube GDT4, the first ends of the first gas discharge tube GDT3 and the second gas discharge tube GDT4 are respectively connected to the first isolation port, the second end is connected to the common end GND, and the first protection circuit to which the second isolation port is connected includes: the gas discharge tube GDT1, the first end of the gas discharge tube GDT1 is connected with the first isolation port, and the second end is connected with the common end GND.
In case 2, the first communication interface included in the first isolated port may be a DSL port, and the first communication interface included in the second isolated port may be a WAN port or a LAN port.
In another implementation, in case 2, the first isolated port may be an external isolated port, and the second isolated port may be an internal isolated port or an external isolated port.
In one possible implementation manner of the present application, the structure of each isolated port in the embodiment of the present application may be determined by the communication frequency of the communication interface corresponding to the isolated port. For example, as shown in fig. 1 or fig. 2, the isolation port 201 includes a WAN port and a network transformer T1 connected to the WAN port, the isolation port 202 includes a LAN port and a network transformer T2 connected to the LAN port, and the isolation port 203 includes a DSL port and a network transformer T3 connected to the DSL port. Since the communication interface to which the first network transformer is connected is a WAN port, and the communication interface to which the network transformer T3 is connected is a DSL port, the communication frequencies of the two are different in practice, so the network transformer T1 includes a primary coil and a secondary coil, the primary coil has a center tap, the primary coil is connected to the WAN port, and the secondary coil is connected to the first chip U1. The network transformer T3 comprises a primary coil group and a secondary coil, the primary coil group comprises a capacitor, coils connected to two ends of the capacitor are connected with a DSL port, and the secondary coil is connected with a fourth chip U4.
In the floating device applicable to the protection system provided by the embodiment of the application, the isolation port comprises the first communication interface and the isolation module, and the isolation module is connected with the chip inside the floating device. The first isolation port and the second isolation port are different in structure, the isolation module included in the first isolation port is a network transformer T1, the network transformer T1 is composed of a primary coil and a secondary coil, and the primary coil is provided with a center tap. The isolation module that the second isolation port includes is network transformer T2, and network transformer T2 comprises primary coil group and secondary coil, and primary coil group comprises first coil, second coil and electric capacity, and the one end of electric capacity is connected to the one end of first coil, and the one end of second coil is connected to the other end of electric capacity.
The first isolation port and the second isolation port have the same structure, the first communication interface included in the first isolation port is one of a WAN port and a LAN port, and the first communication interface included in the second isolation port is the other one of the WAN port and the LAN port.
The first isolation port and the second isolation port are different in structure, the first communication interface included in the first isolation port is a DSL port, and the first communication interface included in the second isolation port is one of a WAN port and a LAN port.
In one possible implementation of the present application, in conjunction with fig. 3, the first isolated port is isolated port 201 and the second isolated port is isolated port 202. The primary coil of the network transformer T1 is connected with the WAN port, the secondary coil is connected with the chip module, and the center tap of the primary coil of the network transformer T1 is used for being connected with the first protection circuit. The primary coil of the network transformer T2 is connected with the LAN port, the secondary coil is connected with the chip module, and the center tap of the primary coil of the network transformer T2 is used for being connected with the first protection circuit.
In one possible implementation of the present application, in conjunction with fig. 4, the first isolated port is isolated port 203 and the second isolated port is isolated port 201. The primary coil set of the network transformer T3 is connected with the DSL port, the secondary coil is connected with the chip module, the primary coil set comprises a capacitor and coils connected to two ends of the capacitor, one end of the first gas discharge tube GDT3 is connected with one coil, and one end of the second gas discharge tube GDT4 is connected with the other coil.
In the floating device applicable to the protection system provided by the embodiment of the application, the floating device is provided with a second protection circuit, and the second protection circuit comprises a first semiconductor discharge tube TSS1 and a second semiconductor discharge tube TSS2, wherein the first ends of the first semiconductor discharge tube TSS1 and the second semiconductor discharge tube TSS2 are respectively connected with a second non-isolated port, and the second ends are connected with a common end GND.
In a possible implementation manner of the present application, referring to fig. 5, the second non-isolated port includes a second communication interface that is an FXS port, and one ends of the first semiconductor discharge tube TSS1 and the second semiconductor discharge tube TSS2 are respectively connected to the FXS port, and the other ends are connected to the common end GND.
In the floating device applicable to the protection system provided by the embodiment of the application, the first protection circuit connected with the third isolation port in the plurality of isolation ports is used for guiding the surge voltage input to the third isolation port to the second protection circuit, and the first communication interface included in the third isolation port is one of a DSL port, a WAN port and a LAN port. The second non-isolated port comprises a second communication interface which is connected with a chip inside floating equipment to which the protection system is applicable.
In one possible implementation of the present application, referring to fig. 6, the third isolation port is the isolation port 203, the primary coil set of the network transformer T3 is connected to the DSL port, the secondary coil is connected to the chip module, the primary coil set includes a capacitor, and coils connected to two ends of the capacitor, and the two coils are connected to two first protection circuits. The second non-isolated port includes a second communication interface which is an FXS port, and one end of the first semiconductor discharge tube TSS1 and one end of the second semiconductor discharge tube TSS1 are respectively connected to the FXS port, and the other end is connected to the common end GND.
In the floating device applicable to the protection system provided by the embodiment of the application, when the plurality of isolation ports comprise the first isolation port, the first isolation port is an external isolation port of the floating device. Or, the second non-isolated port is an external isolated port of the floating device.
In one possible implementation manner of the present application, the external isolation port of the floating device refers to an isolation port exposed outside the floating device, and taking a WAN port, a LAN port and a DSL port as examples, where the WAN port and the DSL port are external isolation ports, and the LAN does not belong to the external isolation ports.
In the floating device applicable to the protection system provided by the embodiment of the application, the second protection circuit connected with the second non-isolated port is used for guiding the surge voltage input to the second non-isolated port to the first non-isolated port, the first non-isolated port comprises the second communication interface, and the second communication interface is connected with the chip set in the floating device. The second non-isolated port includes a second communication interface, which is an FXS port.
In one possible implementation of the present application, in conjunction with fig. 7, the first non-isolated port includes a second communication interface, which is a USB port. The second non-isolated port comprises a second communication interface, wherein the second communication interface is an FXS port, one end of the first semiconductor discharge tube TSS1 and one end of the second semiconductor discharge tube TSS2 are respectively connected with the FXS port, and the other end of the first semiconductor discharge tube TSS1 and the other end of the second semiconductor discharge tube TSS2 are connected with the common end GND.
In one possible embodiment of the present application, the floating device to which the protection system provided by the embodiment of the present application is applicable further includes: the Bob Smith circuit is connected in parallel with the first protection circuit and is used for common mode filtering and impedance matching.
In one possible embodiment of the application, the floating device comprises a plurality of chip modules and the above-described protection system. The first non-isolated port and the second non-isolated port are respectively connected with one chip module, and communication interfaces included by different isolated ports are different.
As shown in fig. 2, the plurality of chip modules includes a chip U1, a chip U2, a chip U3, and a chip U4. The first communication interface (WAN port) included in the isolation port 201 is connected to the chip U1 through the network transformer T1, and the first communication interface (LAN port) included in the isolation port 202 is connected to the chip U2 through the network transformer T1. The isolation port 203 includes a first communication interface (DSL port) connected to the chip U4 through a network transformer T3. The first non-isolated port includes a second communication interface (USB) direct connect chip U2. The second non-isolated port includes a second communication interface (FXS) directly connected to the chip U3.
In one possible implementation of the present application, the chip modules are connected to each other, and in combination with fig. 2, the chip U1 is connected to the chip U2. The chip U3 is connected with the chip U2. The chip U4 is connected to the chip U2.
The paths of the surge currents generated by the surge voltages of the present application will be described below with specific ports as examples with reference to fig. 3 to 7.
Fig. 3 is a schematic structural diagram of a floating device from isolated port to isolated port according to an embodiment of the present application. In fig. 3, taking a WAN port as a communication interface included in the isolation port 201, a network transformer T1 as an isolation module, a LAN port as a communication interface included in the isolation port 202, and a network transformer T2 as an isolation module, referring to fig. 3, the apparatus includes: WAN port, LAN port, network transformer T1, network transformer T2, resistor R1, resistor R2, capacitor C1, capacitor C2, gas discharge tube GDT1, gas discharge tube GDT2, common GND isolation port 201, isolation port 202, and chipset 101.
The primary coil of the network transformer T1 is connected to the WAN port, the secondary coil is connected to the chipset 101, a center tap of the primary coil of the network transformer T1 is connected to a first end of the resistor R1, a second end of the resistor R1 is connected to a first end of the capacitor C1, a second end of the capacitor C1 is connected to the common end GND, a first end of the first gas discharge tube GDT1 is connected to a first end of the resistor R1, and a second end of the gas discharge tube GDT1 is connected to a second end of the capacitor C1. The primary coil of the network transformer T2 is connected with the WAN port, the secondary coil is connected with the chip set 101, the center tap of the primary coil of the network transformer T2 is connected with the first end of a resistor R2, the second end of the resistor R2 is connected with the first end of a capacitor C2, the second end of the capacitor C2 is connected with a common end GND, the first end of a gas discharge tube GDT2 is connected with the first end of the resistor R2, and the second end of the gas discharge tube GDT2 is connected with the second end of the capacitor C2.
As shown in fig. 3, when the WAN port receives the surge voltage, the surge current is generated due to the abrupt voltage change, passes through the center tap of the primary winding of the network transformer T1, passes through the first gas discharge tube GDT1 and the second gas discharge tube GDT2, flows into the center tap of the primary winding of the network transformer T2, and finally flows from the LAN port to the first conductive terminal, thereby preventing the surge current from damaging the internal circuit to effectively protect the internal circuit.
Alternatively, as shown in fig. 3, in order to test the magnitude of the surge voltage that can be born between the WAN port and the LAN port, a surge generator may be connected between the WAN port and the LAN port, the COM end of the surge generator is connected to the LAN port, the high voltage end of the surge generator is connected to the WAN port, the surge generator provides the surge voltage, and since the voltage mutation generates the surge current, the surge current flows to the WAN port through the high voltage end, and finally the surge current flows from the LAN port to the COM end, the magnitude of the surge voltage that can be born between the WAN port and the LAN port can be measured.
Wherein the surge generator is used for measuring the maximum surge voltage which can be born between the WAN port and the LAN port.
Fig. 4 is a schematic structural diagram of a floating device from isolated port to isolated port according to an embodiment of the present application. Taking an example that the communication interface included in the isolation port 203 is a DSL port, the isolation module is a network transformer T3, the communication interface included in the isolation port 201 is a WAN port, and the isolation module is a network transformer T1, the floating device, referring to fig. 4, includes: WAN port, DSL port, network transformer T1, third network transformer T3, resistor R1, capacitor C1, gas discharge tube GDT3, gas discharge tube GDT4, common port GND, isolation port 201, isolation port 203, and chipset 101.
The primary coil of the network transformer T1 is connected to the WAN port, the secondary coil is connected to the chipset 101, a center tap of the primary coil of the network transformer T1 is connected to a first end of the resistor R1, a second end of the resistor R1 is connected to a first end of the capacitor C1, a second end of the capacitor C1 is connected to the common end GND, a first end of the gas discharge tube GDT1 is connected to a first end of the resistor R1, and a second end of the gas discharge tube GDT1 is connected to a second end of the capacitor C1. The primary coil of the network transformer T3 is connected to the DSL port, the secondary coil set is connected to the chipset 101, the first end of the gas discharge tube GDT3 is connected to the first primary coil of the network transformer T3, the second end of the gas discharge tube GDT3 is connected to the common end GND, the first end of the gas discharge tube GDT4 is connected to the second primary coil of the network transformer T3, and the second end of the gas discharge tube GDT4 is connected to the common end GND.
As shown in fig. 4, when the DSL port receives the surge voltage, the surge current is generated due to the abrupt voltage change, and the surge current is transmitted to the first ground GND through the gas discharge tube GDT3 and the gas discharge tube GDT4 through the primary coil group of the network transformer T3, and the common terminal GND is shared by the gas discharge tube GDT1 and the gas discharge tube GDT3 and the gas discharge tube GDT 4. Therefore, the surge current is led to the center tap of the primary winding of the network transformer T1 through the gas discharge tube GDT1, and finally the surge current input to the DSL port flows to the second conductive end connected to the WAN port, so as to prevent the surge current from damaging the internal circuit, thereby achieving the purpose of effectively protecting the internal circuit.
Alternatively, as shown in fig. 4, in order to test the magnitude of the surge voltage that can be born between the DSL port and the WAN port, a surge generator may be connected between the DSL port and the WAN port, the COM end of the surge generator is connected to the WAN port, the high voltage end of the surge generator is connected to the DSL port, the surge generator provides the surge voltage, and since the voltage mutation generates the surge current, the surge current flows to the DSL port through the high voltage end, and finally the surge current flows from the WAN port to the COM end, so that the magnitude of the surge voltage that can be born between the DSL port and the WAN port can be measured.
Wherein the surge generator is used for measuring the maximum surge voltage which can be born between the DSL port and the WAN port.
Fig. 5 is a schematic diagram of a floating device structure of an isolated port versus a non-isolated port according to an embodiment of the present application. Taking the communication module included in the isolated port 201 as a WAN port, the isolated module as a network transformer T1, and the communication interface included in the second non-isolated port as an FXS port as an example, referring to fig. 5, the apparatus includes: WAN port, FXS port, network transformer T1, resistor R1, capacitor C1, gas discharge tube GDT1, first semiconductor discharge tube TSS1, second semiconductor discharge tube TSS2, common port GND, isolation port 201, and chipset 101.
The primary coil of the network transformer T1 is connected to the WAN port, the secondary coil is connected to the chipset 101, a center tap of the primary coil of the network transformer T1 is connected to a first end of the resistor R1, a second end of the resistor R1 is connected to a first end of the capacitor C1, a second end of the capacitor C1 is connected to the common end GND, a first end of the gas discharge tube GDT1 is connected to a first end of the resistor R1, and a second end of the gas discharge tube GDT1 is connected to a second end of the capacitor C1. The first end of the first semiconductor discharge tube TSS1 is connected to the first end of the FXS port, the second end of the first semiconductor discharge tube TSS1 is connected to the common end GND, the first end of the second semiconductor discharge tube TSS2 is connected to the second end of the FXS port, and the second end of the second semiconductor discharge tube TSS2 is connected to the common end GND.
As shown in fig. 5, when the WAN port receives the surge voltage, the surge current is generated due to the abrupt voltage change, and is transmitted to the common terminal GND through the gas discharge tube GDT1 by the center tap of the primary winding of the network transformer T1, and is guided to the FXS port through the first and second semiconductor discharge tubes TSS1 and TSS2 because the first and second semiconductor discharge tubes TSS1 and TSS2 are commonly connected to the common terminal GND, and finally the surge current input to the FXS port flows to the second conductive terminal connected to the FXS port, so that the surge current is prevented from being damaged by the internal circuit to effectively protect the internal circuit.
Alternatively, as shown in fig. 5, in order to test the magnitude of the surge voltage that can be born between the WAN port and the FXS port, a surge generator may be connected between the WAN port and the FXS port, the COM end of the surge generator is connected to the FXS port, the high voltage end of the surge generator is connected to the WAN port, the surge generator provides the surge voltage, and since the voltage mutation generates the surge current, the surge current flows to the WAN port through the high voltage end, and finally the surge current flows from the FXS port to the COM end, the magnitude of the surge voltage that can be born between the WAN port and the FXS port can be measured.
The surge generator is used for measuring the maximum surge voltage which can be born between the WAN port and the FXS port.
Fig. 6 is a schematic diagram of a floating device structure of an isolated port versus a non-isolated port according to an embodiment of the present application. Taking the example that the communication interface included in the isolated port 203 is a DSL port, the isolated module is a network transformer T3, and the communication interface included in the second non-isolated port is a FXS port, referring to fig. 6, the apparatus includes: FXS port, DSL port, network transformer T3, gas discharge tube GDT4, first semiconductor discharge tube TSS1, second semiconductor discharge tube TSS2, common port GND, isolation port 203, and chipset 101.
The primary coil of the network transformer T3 is connected to the DSL port, the secondary coil is connected to the chipset 101, the first end of the gas discharge tube GDT3 is connected to the first end of the primary coil of the network transformer T3, the second end of the gas discharge tube GDT3 is connected to the common end GND, the first end of the gas discharge tube GDT4 is connected to the second end of the primary coil of the network transformer T3, and the second end of the gas discharge tube GDT4 is connected to the common end GND. The first end of the first semiconductor discharge tube TSS1 is connected to the first end of the FXS port, the second end of the first semiconductor discharge tube TSS1 is connected to the common end GND, the first end of the second semiconductor discharge tube TSS2 is connected to the second end of the FXS port, and the second end of the second semiconductor discharge tube TSS2 is connected to the common end GND.
As shown in fig. 6, when the DSL port receives the surge voltage, the surge current is generated due to the abrupt voltage change, and the surge current is transmitted to the common terminal GND through the primary winding group of the network transformer T3 by the gas discharge tube GDT3 and the gas discharge tube GDT4, and the first semiconductor discharge tube TSS1 and the second semiconductor discharge tube TSS2 are commonly connected to the common terminal GND. Therefore, the surge current is led to the FXS port through the first semiconductor discharge tube TSS1 and the second semiconductor discharge tube TSS2, and finally the surge current inputted to the FXS port flows to the third conductive terminal connected to the FXS port, so as to prevent the surge current from damaging the internal circuit, thereby effectively protecting the internal circuit.
Alternatively, as shown in fig. 6, in order to test the magnitude of the surge voltage that can be born between the DSL port and the FXS port, a surge generator may be connected between the DSL port and the FXS port, the COM end of the surge generator is connected to the FXS port, the high voltage end of the surge generator is connected to the DSL port, the surge generator provides the surge voltage, and since the voltage mutation generates the surge current, the surge current flows to the DSL port through the high voltage end, and finally the surge current flows from the FXS port to the COM end, the magnitude of the surge voltage that can be born between the DSL port and the FXS port can be measured.
Wherein the surge generator is used for measuring the maximum surge voltage which can be born between the DSL port and the FXS port.
Fig. 7 is a schematic diagram of protection of a non-isolated port from a non-isolated port according to an embodiment of the present application. Taking the communication interface included in the first non-isolated port as a USB port and the communication interface included in the second non-isolated port as an FXS port as an example, referring to fig. 7, the protection system includes: FXS port, USB port, first semiconductor discharge tube TSS1, second semiconductor discharge tube TSS2, common terminal GND and chipset 101.
Wherein, the first end of the first semiconductor discharge tube TSS1 is connected to the first end of the FXS port, the second end of the first semiconductor discharge tube TSS1 is connected to the common end GND, the first end of the second semiconductor discharge tube TSS2 is connected to the second end of the FXS port, and the second end of the second semiconductor discharge tube TSS2 is connected to the common end GND. The USB port is directly connected to the chipset 101.
As shown in fig. 7, when the FXS port receives the surge voltage, a surge current is generated due to the abrupt voltage change, and the surge current is transmitted to the common terminal GND through the first and second semiconductor discharge tubes TSS1 and TSS2, and the first and second semiconductor discharge tubes TSS1 and TSS2 are commonly connected to the common terminal GND. Therefore, the surge current is guided to the USB port, and finally the surge current input to the USB port flows to the conductive end connected with the USB port, so that the surge current is prevented from damaging through the internal circuit, and the purpose of effectively protecting the internal circuit is realized.
In one possible implementation of the present application, when a surge voltage is received at the USB port, a surge current is generated due to a sudden voltage change. It should be noted that the USB port has an electrostatic protection circuit, and the USB port has a metal housing, and the metal housing is directly connected to the loop end or the common end. The surge current can be transmitted from the USB port to the first semiconductor discharge tube TSS1 and the second semiconductor discharge tube TSS2, and is led out from the FXS port, so that the surge current is prevented from damaging through the internal circuit, and the purpose of effectively protecting the internal circuit is achieved.
Alternatively, as shown in fig. 7, in order to test the magnitude of the surge voltage that can be born between the FXS port and the USB port, a surge generator may be connected between the FXS port and the USB port, the COM end of the surge generator is connected to the USB port, the high voltage end of the surge generator is connected to the FXS port, the surge generator provides the surge voltage, and since the voltage mutation generates the surge current, the surge current flows to the FXS port through the high voltage end, and finally the surge current flows from the USB port to the COM end, the magnitude of the surge voltage that can be born between the FXS port and the USB port can be measured.
The surge generator is used for measuring the maximum surge voltage which can be born between the FXS port and the USB port.
In the embodiment of the application, when the surge voltage is applied to the external port of the floating equipment, the surge current is generated due to the abrupt voltage change of the surge voltage, and the surge circuit passes through the internal protection circuit of the floating equipment: when the surge current flows in from the isolated port WAN port, the surge current flows out from the isolated port LAN port through the gas discharge tube GDT1 and the gas discharge tube GDT 2; when the surge current flows in from the isolated port DSL port, the surge current flows out from the isolated port WAN port through the gas discharge tube GDT3, the gas discharge tube GDT4, and the gas discharge tube GDT 1; when surge current flows in from the isolated port WAN port, the surge current flows out from the non-isolated port FXS port through the gas discharge tube GDT1, the first semiconductor discharge tube TSS1 and the second semiconductor discharge tube TSS 2; when the surge current flows in from the isolated port DSL port, the surge current flows out from the non-isolated port FXS port through the gas discharge tube GDT3 and the gas discharge tube GDT4, and through the first semiconductor discharge tube TSS1 and the second semiconductor discharge tube TSS 2; when an inrush current flows in from the non-isolated port FXS port, the inrush current flows out from the non-isolated port USB port through the first semiconductor discharge tube TSS1 and the second semiconductor discharge tube TSS 2. The surge current generated by the surge voltage is guided to other ports through different external ports and corresponding protection circuits, and finally guided to the ground, so that the protection of the surge voltage is realized, and the electronic components in the internal circuit are prevented from being damaged by the surge current.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims (10)

1. A protection system, characterized in that the protection system has at least two of the following ports: a plurality of isolated ports, a first non-isolated port, and a second non-isolated port; at least one isolation port in the plurality of isolation ports is connected with a public end through a first protection circuit, the first non-isolation port is connected with the public end, and the second non-isolation port is connected with the public end through a second protection circuit;
the first protection circuit connected with the first isolation port is used for guiding the surge current generated by the surge voltage input into the first isolation port to the conducting end, the conducting end is used for guiding the surge current to the loop end, the conducting end is the first protection circuit connected with the second isolation port,
in the case that the first isolation port and the second isolation port have the same structure, the first protection circuit includes a first protection device, a first end of the first protection device is connected to the first isolation port, a second end of the first protection device is connected to the common end,
under the condition that the structures of the first isolation port and the second isolation port are different, a first protection circuit connected with the first isolation port comprises a first gas discharge tube and a second gas discharge tube, first ends of the first gas discharge tube and the second gas discharge tube are respectively connected with the first isolation port, second ends of the first gas discharge tube and the second gas discharge tube are connected with the common end, the first protection circuit connected with the second isolation port is a first protection device, a first end of the first protection device is connected with the second isolation port, and a second end of the first protection device is connected with the common end;
Or the conducting end is the second protection circuit, or the conducting end is the first non-isolated port, and the first isolated port and the second isolated port belong to a plurality of isolated ports.
2. The protection system of claim 1, wherein the first protection device is a gas discharge tube or a varistor.
3. The protection system of claim 1, wherein the protection system comprises,
the isolation port comprises a first communication interface and an isolation module, the isolation module connects a chip inside floating equipment suitable for the protection system with the first communication interface,
under the condition that the structures of the first isolation port and the second isolation port are the same, the isolation module included in the first isolation port is connected with the first end of the first protection device corresponding to the first isolation port, and the isolation module included in the second isolation port is connected with the first end of the first protection device corresponding to the second isolation port; or alternatively, the first and second heat exchangers may be,
the first isolation port and the second isolation port are different in structure, the isolation module included in the first isolation port is connected with the first ends of the first gas discharge tube and the second gas discharge tube, and the isolation module included in the second isolation port is connected with the first end of the first protection device corresponding to the second isolation port.
4. The protection system of claim 3, wherein the isolation modules included in the first and second isolation ports are first network transformers with a center tap at a primary winding of the first network transformer, the first end of the first protection device being connected to the center tap, the primary winding being connected to the first communication interface;
under the condition that the structures of the first isolation port and the second isolation port are different, the isolation module included in the first isolation port is a second network transformer, the second network transformer comprises a primary coil set, a secondary coil and a first gas discharge tube, the primary coil set is connected with a second communication interface, the primary coil set comprises a capacitor, coils are connected to two ends of the capacitor, the first end of the first gas discharge tube is connected with one coil, and the first end of the second gas discharge tube is connected with the other coil; the isolation module included in the second isolation port is a first network transformer.
5. The protection system of claim 2, wherein, in the case where the first isolated port and the second isolated port are identical in structure,
The first communication interface included in the first isolation port is one of a WAN port and a LAN port, and the first communication interface included in the second isolation port is the other of the WAN port and the LAN port;
and under the condition that the structures of the first isolation port and the second isolation port are different, the first communication interface included in the first isolation port is a DSL port, and the first communication interface included in the second isolation port is one of a WAN port and a LAN port.
6. The protection system of any one of claims 1-5, wherein the second protection circuit comprises: the first ends of the first semiconductor discharge tube and the second semiconductor discharge tube are respectively connected with the second non-isolated port, and the second ends of the first semiconductor discharge tube and the second semiconductor discharge tube are connected with the common end.
7. The protection system according to any one of claims 1 to 5, wherein the conductive terminal is the second protection circuit,
the first isolation port comprises a first communication interface which is one of a DSL port, a WAN port and a LAN port;
The second non-isolated port comprises a second communication interface which is connected with a chip in floating equipment suitable for the protection system.
8. The protection system according to any one of claims 1 to 5, wherein in the case where a plurality of the isolated ports includes the first isolated port, the first isolated port is an external isolated port of a floating device to which the protection system is applied, or,
the second non-isolated port is an external isolated port of floating equipment to which the protection system is applicable.
9. The protection system according to any one of claims 1 to 5, wherein the second protection circuit to which the second non-isolated port is connected is configured to guide a surge voltage input to the second non-isolated port to the first non-isolated port,
the first non-isolated port comprises a third communication interface, and the third communication interface is connected with a chip inside the protection system;
the second communication interface included in the second non-isolated port is an FXS port.
10. A floating installation comprising a plurality of chip modules and a protection system according to any one of claims 1 to 9, a plurality of said isolated ports, said first non-isolated port and said second non-isolated port being respectively connected to one of said chip modules, said isolated ports differing in the communication interfaces comprised by said isolated ports.
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