CN212012673U - Network switcher - Google Patents
Network switcher Download PDFInfo
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- CN212012673U CN212012673U CN202021277259.8U CN202021277259U CN212012673U CN 212012673 U CN212012673 U CN 212012673U CN 202021277259 U CN202021277259 U CN 202021277259U CN 212012673 U CN212012673 U CN 212012673U
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Abstract
The utility model relates to a network switch, include: the inverter comprises an inverter module, a relay, a network input end, a first network output end and a second network output end, wherein the input end of the inverter module is used for inputting switching control signals, the first output end of the inverter module is connected with a power supply through a control coil of the relay, the network input end is connected with the first network output end and the second network output end through a contact of the relay, the inverter module has the function of inverting the signals, the reliability of the switching control signal can be improved through the signal reverse action of the reverser module, the reliable switching of the relay is ensured, under the effect of switching control signals, the contact of the relay acts, so that the network input end can be selectively connected with the first network output end and the second network output end, the reliable automatic switching of the network interface is realized, the intelligent degree is high, and the higher and higher requirements of people on intelligent control are met.
Description
Technical Field
The utility model relates to a network switch.
Background
With the advancement of technology, networks serve as a virtual platform for information transmission, reception and sharing, and are one of the important tools for people to exchange information. In order to ensure the reliability of network communication, a network switch is usually required to perform network switching, but the existing network switches are generally completed through manual operation, are not intelligent enough, and cannot meet the increasingly high requirements of people on intelligent control.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a network switch for solve the lower problem of the intelligent degree of switching mode of current network switch.
In order to solve the problem, the utility model adopts the following technical scheme:
a network switch, comprising: the switching control circuit comprises an inverter module, a relay, a network input end, a first network output end and a second network output end, wherein the input end of the inverter module is used for inputting a switching control signal, the first output end of the inverter module is connected with one end of a control coil of the relay, and the other end of the control coil of the relay is used for being connected with a power supply; the network input end is connected with the movable contact of the relay, the first fixed contact of the relay is connected with the first network output end, and the second fixed contact of the relay is connected with the second network output end.
Preferably, the network switch further includes a switching control signal input branch, where the switching control signal input branch includes a first PNP switching tube, a switching control signal input terminal, a first pull-up resistor, and a first pull-down resistor, a control terminal of the first PNP switching tube is connected to the switching control signal input terminal, the switching control signal input terminal is used to input the switching control signal, a control terminal of the first PNP switching tube is connected to one end of the first pull-up resistor, and another end of the first pull-up resistor is used to connect to the power supply; the input end of the first PNP switch tube is used for being connected with the power supply, the output end of the first PNP switch tube is grounded through the first pull-down resistor, and the output end of the first PNP switch tube is connected with the input end of the inverter module.
Preferably, the switching control signal input branch further includes a first capacitor, the control end of the first PNP switching tube is connected to one end of the first capacitor, and the other end of the first capacitor is used for connecting the power supply.
Preferably, the network switch further comprises a first indicator light control module and a second indicator light control module;
the first indicator light control module comprises a first indicator light control branch, one end of the first indicator light control branch is connected with the second output end of the reverser module, the other end of the first indicator light control branch is grounded, and a first indicator light is arranged on the first indicator light control branch in series;
the second indicator lamp control module includes second PNP switch tube and second indicator lamp control branch road, the control end of second PNP switch tube is connected the third output of reverser module, the one end of second pull-up resistance is connected to the control end of second PNP switch tube, the other end of second pull-up resistance is used for connecting power supply, the input of second PNP switch tube is used for connecting power supply, the output of second PNP switch tube is connected the one end of second indicator lamp control branch road, the other end ground connection of second indicator lamp control branch road, the second indicator lamp control is established ties on the road and is provided with the second indicator lamp.
Preferably, the inverter module is a composite transistor array ULN2003, the composite transistor array ULN2003 includes seven input pins and seven output pins, the seven input pins are respectively an input pin IN1, an input pin IN2, an input pin IN3, an input pin IN4, an input pin IN5, an input pin IN6 and an input pin IN7, the seven output pins are respectively an output pin OUT1, an output pin OUT2, an output pin OUT3, an output pin OUT4, an output pin OUT5, an output pin OUT6 and an output pin OUT7, the output terminal of the first PNP switch tube is connected to the input pin IN1, the input pin IN2, the input pin IN3, the input pin IN4, the input pin IN5, the input pin IN6 and the input pin IN7 of the composite transistor array ULN2003, the first output terminal of the inverter module includes an output pin OUT1, an output pin OUT2 and the output pin OUT3, the second output terminal of the inverter module is an output pin OUT6, the third output terminal of the inverter module is an output pin OUT 7.
Preferably, a first current-limiting resistor is further connected in series to the first indicator light control branch road, and a second current-limiting resistor is further connected in series to the second indicator light control branch road.
Preferably, the network switch further includes a voltage stabilizing branch, one end of the voltage stabilizing branch is connected to the power supply, the other end of the voltage stabilizing branch is grounded, and a voltage stabilizer is disposed on the voltage stabilizing branch.
The utility model has the advantages that: the switching control signal is input to the input end of the reverser module, the reverser module has the function of reversing the signal, namely if the switching control signal is at a low level, the output end of the reverser module outputs a high-level signal, and if the switching control signal is at a high level, the output end of the reverser module outputs a low-level signal, so that the reliability of the switching control signal can be improved to a certain extent through the signal reversing function of the reverser module, and the reliable switching of the relay is ensured; under the action of the switching control signal, the movable contact of the relay can be selectively communicated with the first fixed contact or the second fixed contact, so that the reliable switching of the network interface is realized. Therefore, the network switcher can realize automatic switching of the network interface according to the switching control signal, has higher intelligent degree, meets the higher and higher requirements of people on intelligent control, has simpler and faster control mode, can realize network switching in a short time and ensures stable communication. In addition, the switching control signal and the network signal are isolated through the relay, physical complete isolation is achieved, network communication interference cannot be caused, interference to other external equipment cannot be caused, and normal connection between the network input end and a certain network output end can be achieved even if the power supply is not connected.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly described as follows:
fig. 1 is a schematic diagram of the overall structure of a network switch;
FIG. 2 is a circuit diagram of the switching control signal input branch, inverter module and relay control coil;
fig. 3 is a circuit diagram of a first indicator light control module;
fig. 4 is a circuit diagram of a second indicator light control module;
FIG. 5 is a circuit diagram of a voltage regulation branch;
FIG. 6 is a block diagram of the network interface IN;
FIG. 7 is a block diagram of a relay contact;
fig. 8 is a structural diagram of the network interface a and the network interface B.
Detailed Description
As shown in fig. 1, the present embodiment provides a network switch, including: an inverter module 101, a relay, a network input 104, a first network output 105 and a second network output 106. The relay comprises a control coil 102 and a contact module 103. The input end of the inverter module 101 is used for inputting a switching control signal, the first output end of the inverter module 101 is connected to one end of the control coil 102, and the other end of the control coil 102 is used for connecting a power supply VCC. The network input 104 is connected to the moving contacts of the contact module 103, the first stationary contacts of the contact module 103 are connected to the first network output 105, and the second stationary contacts of the contact module 103 are connected to the second network output 106. It will be appreciated that the voltage of the power supply VCC is set by practical requirements.
The inverter module 101 has a function of inverting the signal, that is, if the switching control signal is at a low level, the output terminal of the inverter module 101 outputs a high level signal, and if the switching control signal is at a high level, the output terminal of the inverter module 101 outputs a low level signal. As a specific embodiment, the inverter module 101 is a composite transistor array ULN2003, the composite transistor array ULN2003 is a high-voltage-withstanding and high-current composite transistor array, and is composed of seven silicon NPN composite transistors, each pair of darlington is connected in series with a 2.7K base resistor, and the darlington can be directly connected to TTL and CMOS circuits under an operating voltage of 5V, and can directly process data which originally needs a standard logic buffer to process. As shown IN fig. 2, the compound transistor array ULN2003 (i.e., the compound transistor array IC 3) includes seven input pins, which are an input pin IN1, an input pin IN2, an input pin IN3, an input pin IN4, an input pin IN5, an input pin IN6, and an input pin IN7, and seven output pins, which are an output pin OUT1, an output pin OUT2, an output pin OUT3, an output pin OUT4, an output pin OUT5, an output pin OUT6, and an output pin OUT 7. For other pins of the compound transistor array ULN2003, detailed description is omitted.
In this embodiment, the network switch further includes a switching control signal input branch, as shown in fig. 2, the switching control signal input branch includes a first PNP switching tube (specifically, a PNP transistor Q1 in fig. 2), a switching control signal input end (a switching control signal input end IO in fig. 2), a first pull-up resistor (a resistor R3 in fig. 2) and a first pull-down resistor (a resistor R4 in fig. 2), a control end of the PNP transistor Q1 is connected to the switching control signal input end IO, the switching control signal input end IO is used for inputting a switching control signal, the control end of the PNP transistor Q1 is connected to one end of the resistor R3, and the other end of the resistor R3 is connected to the power supply VCC. As a specific embodiment, the control terminal of the PNP transistor Q1 is connected to the switching control signal input IO through the resistor R2, and the control terminal of the PNP transistor Q1 is further connected to the power supply VCC through the first capacitor (i.e., the capacitor C3). The input end of the PNP triode Q1 is connected to the power supply VCC, the output end of the PNP triode Q1 is grounded through the resistor R4, and the output end of the PNP triode Q1 is connected to the input end of the inverter module 101. Since the compound transistor array ULN2003 includes the input pin IN1, the input pin IN2, the input pin IN3, the input pin IN4, the input pin IN5, the input pin IN6, and the input pin IN7, the output terminal of the PNP transistor Q1 is connected to the input pin IN1, the input pin IN2, the input pin IN3, the input pin IN4, the input pin IN5, the input pin IN6, and the input pin IN 7. IN this embodiment, resistors are disposed between the output terminal of the PNP transistor Q1 and the seven input pins, wherein a resistor R10 is disposed between the output terminal of the PNP transistor Q1 and the input pin IN1, the input pin IN2, the input pin IN3 and the input pin IN4, and a resistor R11 is disposed between the output terminal of the PNP transistor Q1 and the input pin IN5, the input pin IN6 and the input pin IN7, as shown IN fig. 2.
RL2C, RL1C, and RL3C in fig. 2 represent control coils of a relay, the output pin OUT1, the output pin OUT2, and the output pin OUT3 of the compound transistor array ULN2003 are connected to one ends of the control coil RL2C, the control coil RL1C, and the control coil RL3C, respectively, and the other ends of the control coil RL2C, the control coil RL1C, and the control coil RL3C are connected to a power supply VCC.
In this embodiment, the network switch further includes a first indicator light control module and a second indicator light control module. The first indicator light control module comprises a first indicator light control branch, as shown in fig. 3, one end of the first indicator light control branch is connected to the second output terminal of the inverter module 101 (i.e., the output pin OUT6 of the compound transistor array ULN 2003), the other end of the first indicator light control branch is grounded, and a first indicator light (an indicator light LED-a in fig. 3) is serially connected to the first indicator light control branch. As a specific embodiment, a current-limiting resistor R6 may be further connected in series to the first indicator light control branch, so as to reduce the current in the first indicator light control branch and prevent the indicator light LED-a from being burned down due to a large current.
As shown in fig. 4, the second indicator lamp control module includes a second PNP switching transistor and a second indicator lamp control branch, and the second PNP switching transistor is an NPN triode Q2 in fig. 4. A control terminal of the NPN transistor Q2 is connected to the third output terminal of the inverter module 101 (i.e., the output pin OUT7 of the compound transistor array ULN 2003). A control terminal of the NPN transistor Q2 is connected to one end of the second pull-up resistor (i.e., the resistor R7), and the other end of the resistor R7 is connected to the power supply VCC. As a specific embodiment, a control terminal of the NPN transistor Q2 is connected to the output pin OUT7 of the compound transistor array ULN2003 through a resistor R5. The input end of the NPN triode Q2 is connected with a power supply VCC, the output end of the NPN triode Q2 is connected with one end of the second indicator lamp control branch, and the other end of the second indicator lamp control branch is grounded. And a second indicator lamp (an indicator lamp LED-B in fig. 4) is arranged on the second indicator lamp control branch circuit in series. Further, as shown in fig. 4, the second indicator lamp control branch is also provided with a current limiting resistor R9 in series. As a specific embodiment, the output terminal of the NPN transistor Q2 is further connected to one end of a shunt branch, the other end of the shunt branch is grounded, and a resistor R8 is connected in series to the shunt branch.
In order to ensure the stability of the power supply VCC, the network switch further includes a voltage stabilizing branch, one end of the voltage stabilizing branch is connected to the power supply VCC, and the other end of the voltage stabilizing branch is grounded, as shown in fig. 5, a voltage stabilizer CE1 is disposed on the voltage stabilizing branch, and the voltage stabilizer CE1 may be a voltage stabilizing capacitor or a voltage stabilizing tube.
It should be understood that the electrical parameters of the various components in the network switch are set by the actual circumstances.
The specific types of the network input 104, the first network output 105 and the second network output 106 are not limited, such as an RS485 communication interface, an RS232 communication interface, etc., and different types of network communication interfaces may have different numbers of pins and different functions. In this embodiment, the network input 104, the first network output 105 and the second network output 106 all have a signaling pin and a receiving pin.
As shown IN fig. 6, the network input terminal 104 is a network interface IN, the signaling pin of the network interface IN is a signaling pin CT2P, the receiving pin is a receiving pin CT2N, the signaling pin CT2P corresponds to a pin TDP, a pin CT1P and a pin TDN, and the receiving pin CT2N corresponds to a pin RDP, a pin CT1N and a pin RDN.
Accordingly, in fig. 7, contact module RL1A and contact module RL1B correspond to control coil RL1C, contact module RL2A and contact module RL2B correspond to control coil RL2C, and contact module RL3A and contact module RL3B correspond to control coil RL 3C.
In fig. 8, the first network output 105 is a network interface a, and the second network output 106 is a network interface B. The signaling pin of the network interface a is signaling pin CT2AP, the receiving pin is receiving pin CT2AN, corresponding to signaling pin CT2AP are pin TDAP, pin CT1AP and pin TDAN, and corresponding to receiving pin CT2AN are pin RDAP, pin CT1AN and pin RDAN. The signaling pin of the network interface B is the signaling pin CT2BP, the receiving pin is the receiving pin CT2BN, the signaling pin CT2BP corresponds to the pin TDBP, the pin CT1BP and the pin TDBN, and the receiving pin CT2BN corresponds to the pin RDBP, the pin CT1BN and the pin RDBN.
The connection relationship among the network interface IN, the network interface a, and the network interface B is shown IN fig. 7. It should be understood that the connection manner of the other pins IN the network interface IN, the network interface a and the network interface B belongs to the conventional technology, and is not described IN detail.
When the switching control signal is at high level, the control terminal of the PNP transistor Q1 is at high level, the PNP transistor Q1 is turned off, the input pin of the compound transistor array ULN2003 inputs a low level signal, because the compound transistor array ULN2003 has the effect of signal inversion, the output pin of the compound transistor array ULN2003 outputs a high level signal, no current flows in the control coil RL1C, the control coil RL2C and the control coil RL3C, and the contact modules corresponding to the control coil RL1C, the control coil RL2C and the control coil RL3C are all switched to the contact corresponding to the network interface a, namely, the network interface IN is communicated with the network interface A, and simultaneously, the first indicator light controls the current IN the branch, the indicator light LED-A is lightened, and the PNP triode Q2 is disconnected because the control end is a high level signal, the branch where the indicator light LED-B is located has no current, and the indicator light LED-B is not lightened.
When the switching control signal is at low level, the control terminal of the PNP transistor Q1 is at low level, the PNP transistor Q1 is turned on, the input pin of the composite transistor array ULN2003 inputs a high level signal, because the compound transistor array ULN2003 has the effect of signal inversion, an output pin of the compound transistor array ULN2003 outputs a low-level signal, currents exist in the control coil RL1C, the control coil RL2C and the control coil RL3C, contact modules corresponding to the control coil RL1C, the control coil RL2C and the control coil RL3C are all switched to contacts corresponding to the network interface B, namely, the network interface IN is communicated with the network interface B, meanwhile, the first indicator light controls no current IN the branch, the indicator light LED-A is not lightened, and the PNP triode Q2 is conducted because the control end is a low level signal, the branch where the indicator light LED-B is located has current, and the indicator light LED-B is lightened.
The technical solution of the network switch protected by the present application is described above with reference to a specific circuit structure, it should be understood that the present application is not limited to the specific circuit structure given above, and equivalent substitutions made on the circuit structure are within the scope of the present application.
Claims (7)
1. A network switch, comprising: the switching control circuit comprises an inverter module, a relay, a network input end, a first network output end and a second network output end, wherein the input end of the inverter module is used for inputting a switching control signal, the first output end of the inverter module is connected with one end of a control coil of the relay, and the other end of the control coil of the relay is used for being connected with a power supply; the network input end is connected with the movable contact of the relay, the first fixed contact of the relay is connected with the first network output end, and the second fixed contact of the relay is connected with the second network output end.
2. The network switch according to claim 1, further comprising a switching control signal input branch, wherein the switching control signal input branch comprises a first PNP switch, a switching control signal input terminal, a first pull-up resistor, and a first pull-down resistor, the control terminal of the first PNP switch is connected to the switching control signal input terminal, the switching control signal input terminal is used for inputting the switching control signal, the control terminal of the first PNP switch is connected to one terminal of the first pull-up resistor, and the other terminal of the first pull-up resistor is used for connecting the power supply; the input end of the first PNP switch tube is used for being connected with the power supply, the output end of the first PNP switch tube is grounded through the first pull-down resistor, and the output end of the first PNP switch tube is connected with the input end of the inverter module.
3. The network switch of claim 2, wherein the switching control signal input branch further comprises a first capacitor, the control terminal of the first PNP switch is connected to one terminal of the first capacitor, and the other terminal of the first capacitor is connected to the power supply.
4. The network switch of claim 2 or 3, further comprising a first indicator light control module and a second indicator light control module;
the first indicator light control module comprises a first indicator light control branch, one end of the first indicator light control branch is connected with the second output end of the reverser module, the other end of the first indicator light control branch is grounded, and a first indicator light is arranged on the first indicator light control branch in series;
the second indicator lamp control module includes second PNP switch tube and second indicator lamp control branch road, the control end of second PNP switch tube is connected the third output of reverser module, the one end of second pull-up resistance is connected to the control end of second PNP switch tube, the other end of second pull-up resistance is used for connecting power supply, the input of second PNP switch tube is used for connecting power supply, the output of second PNP switch tube is connected the one end of second indicator lamp control branch road, the other end ground connection of second indicator lamp control branch road, the second indicator lamp control is established ties on the road and is provided with the second indicator lamp.
5. The network switch of claim 4, wherein the inverter module is a composite transistor array ULN2003, the composite transistor array ULN2003 includes seven input pins and seven output pins, the seven input pins are respectively an input pin IN1, an input pin IN2, an input pin IN3, an input pin IN4, an input pin IN5, an input pin IN6 and an input pin IN7, the seven output pins are respectively an output pin OUT1, an output pin OUT2, an output pin OUT3, an output pin OUT4, an output pin OUT5, an output pin OUT6 and an output pin OUT7, the output end of the first PNP switch tube is connected with the input pin IN1, the input pin IN2, the input pin IN3, the input pin IN4, the input pin IN5, the input pin IN6 and the input pin OUT7 of the composite transistor array ULN2003, and the first output end of the inverter module includes the output pin OUT1, OUT1, An output pin OUT2 and an output pin OUT3, the second output terminal of the inverter block is the output pin OUT6, and the third output terminal of the inverter block is the output pin OUT 7.
6. The network switch according to claim 4, wherein the first indicator light control branch circuit is further connected in series with a first current limiting resistor, and the second indicator light control branch circuit is further connected in series with a second current limiting resistor.
7. The network switch of claim 1, further comprising a voltage-stabilizing branch, wherein one end of the voltage-stabilizing branch is connected to the power supply, and the other end of the voltage-stabilizing branch is grounded, and a voltage regulator is disposed on the voltage-stabilizing branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021277259.8U CN212012673U (en) | 2020-07-03 | 2020-07-03 | Network switcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021277259.8U CN212012673U (en) | 2020-07-03 | 2020-07-03 | Network switcher |
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| CN212012673U true CN212012673U (en) | 2020-11-24 |
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| CN202021277259.8U Active CN212012673U (en) | 2020-07-03 | 2020-07-03 | Network switcher |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111800278A (en) * | 2020-07-03 | 2020-10-20 | 河南万国科技股份有限公司 | Network switcher |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111800278A (en) * | 2020-07-03 | 2020-10-20 | 河南万国科技股份有限公司 | Network switcher |
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