CN212343321U

CN212343321U - Intelligent concentrator circuit

Info

Publication number: CN212343321U
Application number: CN202021866973.0U
Authority: CN
Inventors: 荆顺利; 杨琛琛
Original assignee: Yantai Derong Industry Co Ltd
Current assignee: Yantai Derong Industry Co Ltd
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2021-01-12
Anticipated expiration: 2030-09-01

Abstract

The utility model provides an intelligence concentrator circuit, belongs to the concentrator field, concretely relates to intelligence concentrator circuit. The utility model provides a can prevent that transposition, security are high, have complete instruction function's intelligent concentrator circuit. The utility model discloses in, the output of connector in proper order with overcurrent protection circuit, prevent reverse connection circuit and super undervoltage detection circuit series connection, the output of super undervoltage detection circuit is parallelly connected with M group overcurrent protection detection circuit's input, M group overcurrent protection detection circuit's output is connected with M group port connector's input respectively, M group interface power indicator circuit's input is connected with M group overcurrent protection detection circuit's output respectively, the output and M group port connector signal connection of connector, N group signal indicator's input inserts on connector and the signal line that M group port connector is connected. The utility model discloses the signal input and the output of mainly used concentrator.

Description

Intelligent concentrator circuit

Technical Field

The utility model belongs to the concentrator field, concretely relates to intelligence concentrator circuit.

Background

A hub is a termination of a distribution cable or cable, which is connected to a section of a distribution cable or cable and a subscriber line, and which has an important role in branching a trunk line. The concentrator can be installed in narrow and small spaces such as crane span structure, box, pipeline, cable pit, does not occupy the effective usable floor area of building, simple to operate need not cut the leader cable. Generally, a hub is composed of the following parts:

1. a power supply access port. The hub is intended to convert a power signal to multiple outputs, so it is a primary requirement that a power supply be accessible.

2. And (3) a cable. The plug of the cable is a common power plug used for connecting an external power supply.

3. And (6) an output port. Used for outputting power, and other devices needing power are plugged into the port.

And 4, LED indicator lamps. Which is used to identify whether the power supply is normal and the presence or absence of a signal.

5. A housing. The materials may also be different depending on the needs of different industrial applications. Such as explosion-proof and waterproof performance.

At present, the concentrator does not distinguish the positive pole and the negative pole of the access port, and the port can be damaged after reverse connection or short circuit, and even external components can be damaged. Users are easy to cause equipment jamming in frequent plugging or bearing, and surge and other phenomena can occur in the plugging process, so that the safety performance of the equipment is poor; moreover, the conventional concentrator has no error indication function, and the working state of each unit of the concentrator cannot be known.

Therefore, there is a need for an intelligent hub circuit that prevents reverse connection, is highly secure, and has a complete indication function.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to current concentrator can not prevent to connect conversely, the security is poor, can not instruct wrong defect, provide one kind can prevent to connect conversely, the security is high, have complete instruction function's intelligent concentrator circuit.

The technical scheme of the utility model as follows:

the utility model relates to an intelligent concentrator circuit, which comprises a connector, an overcurrent protection circuit, an anti-reverse connection circuit, an ultra-low voltage detection circuit, M groups of overcurrent protection detection circuits, M groups of port connectors, M groups of interface power indicator circuits and N groups of signal indicator lamps, the output end of the connector is sequentially connected in series with an overcurrent protection circuit, an anti-reverse connection circuit and an ultra-low voltage detection circuit, the output end of the ultra-low voltage detection circuit is connected with the input ends of the M groups of overcurrent protection detection circuits in parallel, the output ends of the M groups of overcurrent protection detection circuits are respectively connected with the input ends of the M groups of port connectors, the input ends of the M groups of interface power supply indicator lamp circuits are respectively connected with the output ends of the M groups of overcurrent protection detection circuits, the output end of the connector is in signal connection with the M groups of port connectors, and the input ends of the N groups of signal indicating lamps are connected to a signal line connected with the M groups of port connectors.

Further: the power supply circuit also comprises an integral power supply indicating lamp circuit, wherein the input end of the integral power supply indicating lamp circuit is connected with the output end of the ultra-low voltage detection circuit.

Further: the signal end of the connector is in communication connection with an upper computer, and the power end of the connector is connected with an external power supply; and the output ends of the M groups of port connectors are respectively connected with the input ends of the N groups of digital quantity sensors in parallel.

Further: the overcurrent protection circuit is specifically a PNP type power supply detection protection circuit, and the PNP type power supply detection protection circuit comprises a resistor R6, a resistor R9, a resistor R12, a resistor R14, a resistor R16, a light-emitting diode D2, a fuse F3, a MOS tube Q3, a MOS tube Q5, a second power supply and a third power supply; the resistor R14 is connected in series with the resistor R16, the other end of the resistor R16 is grounded, the other end of the resistor R14 is connected with the gate of the MOS transistor Q5, one end of the fuse F3 is connected between the resistor R14 and the resistor R16, and the other end of the fuse F3 is connected with a second power supply; the resistor R9 is connected in series with the resistor R12, the other end of the resistor R9 is connected with a second power supply, the other end of the resistor R12 is connected with the gate of the MOS transistor Q3, and the drain of the MOS transistor Q5 is connected between the resistor R9 and the resistor R12; the resistor R6 is connected in series with the anode of the light-emitting diode D2, the other end of the resistor R6 is connected with a third power supply, and the cathode of the light-emitting diode D2 is connected with the gate of the MOS transistor Q3; the gates of the MOS transistor Q3 and the MOS transistor Q5 are grounded; the external power supply is connected between the resistor R14 and the resistor R16.

Further: the over-current protection circuit is specifically an NPN type power supply detection protection circuit, and the NPN type power supply detection protection circuit comprises a resistor R18, a resistor R24, a resistor R26, a light emitting diode D5, a fuse F6, an MOS tube Q7, a second power supply and a third power supply; the resistor R24 is connected in series with the resistor R26, the other end of the resistor R24 is connected with a second power supply, one end of the fuse F6 is connected between the resistor R24 and the resistor R26, the other end of the resistor R26 is connected with the grid electrode of the MOS tube Q7, the resistor R18 is connected in series with the anode of the light-emitting diode D5, the cathode of the light-emitting diode D5 is connected with the drain electrode of the MOS tube Q7, and the other end of the fuse F6 and the source electrode of the MOS tube Q7 are both grounded; the external power supply is connected between the resistor R24 and the resistor R26.

Further: the integral power indicator lamp circuit, the M groups of interface power indicator lamp circuits and the N groups of signal indicator lamps are all PNP type signal display circuits, and each PNP type signal display circuit comprises a resistor R10, a light emitting diode D1 and a fuse F1; one end of the fuse F1 is connected with the anode of the light emitting diode D1, the cathode of the light emitting diode D1 is connected with one end of the resistor R10, the other end of the resistor R10 is grounded, and two ends of the fuse F1 are both signal input and output ports.

Further: the integral power indicator lamp circuit, the M groups of interface power indicator lamp circuits and the N groups of signal indicator lamps are all NPN type signal display circuits, and each NPN type signal display circuit comprises a resistor R20, a light emitting diode D6, a fuse F5 and a second power supply; the positive electrode of the light emitting diode D6 is connected with one end of the resistor R20, one end of the fuse F5 is connected with the negative electrode of the light emitting diode D6, the other end of the resistor R20 is connected with a second power supply, and two ends of the fuse F5 are both signal input and output ports.

Further: wherein M and N are both positive integers.

The utility model has the advantages that:

the utility model relates to an intelligence concentrator circuit arouses port or components and parts to damage and increases the protection for industry control trade wiring mistake. The protection port can not be damaged, the external power supply is stopped when the short circuit occurs, the indicator lamp gives an alarm to the outside when the voltage is abnormal, and the electrical property of other ports is not influenced. Aiming at the practical application condition of an industrial field, the NPN or PNP module power supply detection circuit is selected, the power supply of the power supply module can be detected, the alarm of an indicator lamp is realized through an MOS (metal oxide semiconductor) tube, the input current is protected through a fuse, the overcurrent protection effect is realized, the voltage of the input voltage is divided through a resistor, the MOS tube is further protected, and the safety of the MOS tube is higher.

Drawings

Fig. 1 is a circuit block diagram of an intelligent concentrator circuit for 16-channel digital signals according to the present invention;

FIG. 2 is a block circuit diagram of an intelligent hub circuit for 8-way digital signals;

FIG. 3 is a circuit diagram of a PNP type power detection protection circuit;

FIG. 4 is a circuit diagram of an NPN power detection protection circuit;

FIG. 5 is a circuit diagram of a PNP type signal display circuit;

fig. 6 is a circuit diagram of an NPN-type signal display circuit.

Detailed Description

The technical solution of the present invention is further described below with reference to the embodiments, but not limited thereto, and all modifications or equivalent replacements of the technical solution of the present invention may be made without departing from the spirit and scope of the technical solution of the present invention.

Example 1

The embodiment is described with reference to fig. 1 and fig. 2, and in this embodiment, an intelligent hub circuit related to this embodiment includes a connector, an overcurrent protection circuit, an anti-reverse connection circuit, an ultra-low voltage detection circuit, an M-set overcurrent protection detection circuit, an M-set port connector, an M-set interface power indicator circuit, and N-set signal indicator lamps, where an output end of the connector is sequentially connected in series with the overcurrent protection circuit, the anti-reverse connection circuit, and the ultra-low voltage detection circuit, an output end of the ultra-low voltage detection circuit is connected in parallel with an input end of the M-set overcurrent protection detection circuit, output ends of the M-set overcurrent protection detection circuit are respectively connected with input ends of the M-set port connector, input ends of the M-set interface power indicator circuit are respectively connected with output ends of the M-set overcurrent protection detection circuit, and output ends of the connector are connected with, and the input ends of the N groups of signal indicator lamps are connected to signal lines connected with the connectors and the M groups of port connectors. The purpose of this is: the connector cable is divided into two paths, one path of the cable reaches the M groups of overcurrent protection detection circuits through the overcurrent protection circuit, the reverse connection prevention circuit and the overvoltage and undervoltage detection circuit, the other path of the cable is directly connected with the M groups of PORT PORT connectors in parallel, whether the working state of the N groups of signal indicator lamp groups is normal or not is displayed in real time through the N groups of signal indicator lamp groups connected in parallel to the N groups of signal indicator lamp groups, and the M groups of overcurrent protection detection circuits are connected in parallel to the M groups of interface power indicator lamp circuits for displaying whether the M groups of overcurrent protection detection circuits work. The power protection circuit is additionally arranged, so that hubs with protection circuits of different structures can be selected according to different application scenes, and the problem of unmatched supply and demand is avoided.

Example 2

The present embodiment is described with reference to embodiment 1, and in the present embodiment, an intelligent hub circuit according to the present embodiment further includes an overall power indicator circuit, where an input terminal of the overall power indicator circuit is connected to an output terminal of the ultra-low voltage detection circuit. The purpose of this is: and the integral power supply indicating lamp circuit displays the working state of the ultra-low voltage detection circuit in real time. The overcurrent protection detection circuit is divided into a PNP type and an NPN type in principle, wherein three groups of power supply voltages commonly used by the overcurrent protection detection circuit are +3.3V, +24V and +5V respectively, and different power supply voltages are selected according to different selected protection circuits.

Example 3

The present embodiment is described with reference to embodiment 1, in the present embodiment, a signal terminal of the connector is communicatively connected to an upper computer, and a power terminal of the connector is connected to an external power supply; and the output ends of the M groups of port connectors are respectively connected with the input ends of the N groups of digital quantity sensors in parallel. The purpose of this is: the input end of the socket connector is respectively connected with an upper computer and an external power supply, so that the inflow of the power supply and the interaction of signals are realized, the socket connector of the PORT PORT is connected with the digital quantity sensor, for example, as shown in figures 1 and 2, M is 8, N is 8 or 16, namely, each group of digital sensor corresponds to each group of interface power supply indicator lamps.

Example 4

The embodiment is described with reference to fig. 3 and embodiment 1, and in this embodiment, the overcurrent protection circuit is specifically a PNP power supply detection protection circuit, where the PNP power supply detection protection circuit includes a resistor R6, a resistor R9, a resistor R12, a resistor R14, a resistor R16, a light emitting diode D2, a fuse F3, a MOS transistor Q3, a MOS transistor Q5, a second power supply, and a third power supply; the resistor R14 is connected in series with the resistor R16, the other end of the resistor R16 is grounded, the other end of the resistor R14 is connected with the gate of the MOS transistor Q5, one end of the fuse F3 is connected between the resistor R14 and the resistor R16, and the other end of the fuse F3 is connected with a second power supply; the resistor R9 is connected in series with the resistor R12, the other end of the resistor R9 is connected with a second power supply, the other end of the resistor R12 is connected with the gate of the MOS transistor Q3, and the drain of the MOS transistor Q5 is connected between the resistor R9 and the resistor R12; the resistor R6 is connected in series with the anode of the light-emitting diode D2, the other end of the resistor R6 is connected with a third power supply, and the cathode of the light-emitting diode D2 is connected with the gate of the MOS transistor Q3; the gates of the MOS transistor Q3 and the MOS transistor Q5 are grounded; the external power supply is connected between the resistor R14 and the resistor R16. The purpose of this is: when the device works normally, the +24V power supply + is output to the 24V power supply through the fuse F3, and the power is supplied to the outside normally; meanwhile, the +24V is connected to a Q5 gate electrode through F3 and R14, and the Q5 conduction condition is met, so that Q5 is conducted; +24V flows to GND through R9 and Q5, and +24V cannot flow to the gate of Q3 through R9 and R12, which does not meet the Q3 conduction condition, so Q3 does not conduct. The +5V current cannot flow to GND through R6, D2, Q3, and D2 does not emit light. When the 24V power supply + output is in short circuit or overcurrent or overtemperature with GND, the fuse F3 is disconnected, the +24V cannot supply power to the 24V power supply + output through the fuse F3, meanwhile, the +24V cannot be connected to a Q5 gate electrode through F3 and R14, the GND is connected to a Q5 gate electrode through R16 and R14, and the conduction condition of the Q5 is not met, so that the Q5 is not conducted; the +24V cannot flow to GND through R9 and Q5, and the +24V flows to the gate of Q3 through R9 and R12, so that the Q3 conduction condition is met, and Q3 is conducted. The +5V current flows to GND through R6, D2, Q3, and D2 emits light. F3 may be replaced with any current protection device or protection circuit. The detection and display circuit composed of R14, R16, R9, R6, Q3, Q5 and D2 can be replaced by various schemes, such as an optical coupler, an operational amplifier and the like, Q3 and Q5 can be replaced by P-channel MOS, NPN triode, PNP triode and the like, D2 can be changed into various colors and comprises an isolation type or non-isolation type detection circuit, when the detection and display circuit works normally, F3 is conducted, power is supplied to the outside normally, Q5 is conducted, Q3 is turned off, and D12 is not bright; when the 24V power supply + output is short-circuited or overcurrent or overtemperature is generated, F3 is disconnected, external power supply disappears, Q5 is turned off, Q3 is turned on, and D12 lights.

Example 5

With reference to fig. 4 and embodiment 1, in this embodiment, an overcurrent protection circuit of an intelligent hub circuit according to this embodiment is specifically an NPN-type power detection protection circuit, where the NPN-type power detection protection circuit includes a resistor R18, a resistor R24, a resistor R26, a light emitting diode D5, a fuse F6, a MOS transistor Q7, a second power supply, and a third power supply; the resistor R24 is connected in series with the resistor R26, the other end of the resistor R24 is connected with a second power supply, one end of the fuse F6 is connected between the resistor R24 and the resistor R26, the other end of the resistor R26 is connected with the grid electrode of the MOS tube Q7, the resistor R18 is connected in series with the anode of the light-emitting diode D5, the cathode of the light-emitting diode D5 is connected with the drain electrode of the MOS tube Q7, and the other end of the fuse F6 and the source electrode of the MOS tube Q7 are both grounded; the external power supply is connected between the resistor R24 and the resistor R26. The purpose of this is: when the device works normally, the GND outputs a 24V power supply through the fuse F6 to supply power to the outside normally; meanwhile, GND is connected to the gate of Q7 through F6 and R26, and the Q7 conduction condition is not met, so that Q7 is not conducted, the +5V current cannot flow to GND through R18, D5 and Q7, and D5 does not emit light. When the 24V power supply-output is short-circuited or over-current or over-temperature of any power supply, the fuse F6 is disconnected, GND can not supply power to the 24V power supply-output through the fuse F6, meanwhile GND can not be connected to a Q7 gate through F6 and R26, and +24V is connected to a Q7 through R24 and R26, so that the gate is in accordance with the conduction condition of Q7, Q7 is conducted, and +5V current flows to GND through R18, D5 and Q7, and D5 emits light. F6 may be replaced with any current protection device or protection circuit. The detection and display circuit composed of R24, R26, R18, Q7 and D5 can be replaced by various schemes, such as an optical coupler, an operational amplifier and the like, Q7 can be replaced by a P-channel MOS, an NPN triode, a PNP triode and the like, D5 can be replaced by detection circuits with various colors including an isolation type or a non-isolation type, when the detection and display circuit works normally, F6 is conducted, power is supplied to the outside normally, Q7 is turned off, and D5 is not bright; when the 24V power supply-output is short-circuited or over-current or over-temperature occurs, F6 is disconnected, external power supply disappears, Q7 is conducted, and D5 is lighted.

Example 6

With reference to fig. 5 and embodiment 1, in this embodiment, the overall power indicator circuit, the M groups of interface power indicator circuits, and the N groups of signal indicator lamps are all PNP type signal display circuits, and the PNP type signal display circuits include a resistor R10, a light emitting diode D1, and a fuse F1; one end of the fuse F1 is connected with the anode of the light emitting diode D1, the cathode of the light emitting diode D1 is connected with one end of the resistor R10, the other end of the resistor R10 is grounded, and two ends of the fuse F1 are both signal input and output ports. The purpose of this is: in normal operation, F1 is on and current can flow from the signal input/output port, through F1, and to the signal output/input port. When the signal input/output port is at high level, current can flow to GND through D1 and R10, D1 emits light, when the signal input/output port is at low level, no current flows through D1 and R10, D1 does not emit light, when the current between the signal input/output port and the signal output/input port is short-circuited or overcurrent or overtemperature occurs, the current flowing through F1 is overlarge, F1 is disconnected, and the current cannot flow from the signal input/output port to the signal output/input port through F1. When the signal input/output port is at a high level, current may flow to GND through D1, R10, and D1 emits light, and when the signal input/output port is at a low level, no current flows through D1, R10, and D1 does not emit light, and F1 may be replaced with any current protection device or protection circuit. D2 can be changed to various colors. When the LED lamp works normally, F1 is conducted, signals can flow left and right normally, and D1 shows on and off along with the change of the signal height; when the signal is short-circuited, over-current or over-temperature, F1 is disconnected, the signal cannot flow left or right, and D1 cannot indicate the change condition of the whole signal path.

Example 7

With reference to fig. 6 and embodiment 1, in the present embodiment, the overall power indicator circuit, the M groups of interface power indicator circuits, and the N groups of signal indicator lamps are all NPN-type signal display circuits, and each of the NPN-type signal display circuits includes a resistor R20, a light emitting diode D6, a fuse F5, and a second power supply; the positive electrode of the light emitting diode D6 is connected with one end of the resistor R20, one end of the fuse F5 is connected with the negative electrode of the light emitting diode D6, the other end of the resistor R20 is connected with a second power supply, and two ends of the fuse F5 are both signal input and output ports. The purpose of this is: in normal operation, F5 is on and current can flow from the signal input/output port, through F5, and to the signal output/input port. When the signal input/output port is at low level, the current of +24V can flow to the signal input/output port through D6 and R20, D1 emits light, when the signal input/output port is at high level, no current flows through D6 and R20, D6 does not emit light, when the current between the signal input/output port and the signal output/input port is short-circuited, overcurrent or overtemperature occurs, the current flowing through F5 is overlarge, F5 is disconnected, and the current cannot flow from the signal input/output port to the signal output/input port through F1. When the signal input/output port is at a low level, +24V current may flow through D6, R20 to the signal input/output port, D1 is lit, when the signal input/output port is at a high level, no current flows through D6, R20, D6 is not lit, and F5 may be replaced with any current protection device or protection circuit. D2 can be changed to various colors. When the LED lamp works normally, F5 is conducted, signals can flow left and right normally, and D6 is changed along with the low and high of the signals and appears on and off; when the signal is short-circuited, over-current or over-temperature, F5 is disconnected, the signal cannot flow left or right, and D6 cannot indicate the change condition of the whole signal path.

Claims

1. An intelligent concentrator circuit is characterized by comprising a connector, an overcurrent protection circuit, an anti-reverse connection circuit, an ultra-low voltage detection circuit, M groups of overcurrent protection detection circuits, M groups of port connectors, M groups of interface power supply indicator circuits and N groups of signal indicator lamps, the output end of the connector is sequentially connected in series with an overcurrent protection circuit, an anti-reverse connection circuit and an ultra-low voltage detection circuit, the output end of the ultra-low voltage detection circuit is connected with the input ends of the M groups of overcurrent protection detection circuits in parallel, the output ends of the M groups of overcurrent protection detection circuits are respectively connected with the input ends of the M groups of port connectors, the input ends of the M groups of interface power supply indicator lamp circuits are respectively connected with the output ends of the M groups of overcurrent protection detection circuits, the output end of the connector is in signal connection with the M groups of port connectors, and the input ends of the N groups of signal indicating lamps are connected to a signal line connected with the M groups of port connectors.

2. An intelligent hub circuit according to claim 1, further comprising an integral power indicator circuit, an input of the integral power indicator circuit being connected to an output of the overvoltage/undervoltage detection circuit.

3. The intelligent hub circuit of claim 1, wherein the signal terminal of the connector is communicatively connected to an upper computer, and the power terminal of the connector is connected to an external power source; and the output ends of the M groups of port connectors are respectively connected with the input ends of the N groups of digital quantity sensors in parallel.

4. An intelligent hub circuit according to claim 3, wherein the overcurrent protection circuit is specifically a PNP type power supply detection protection circuit, and the PNP type power supply detection protection circuit comprises a resistor R6, a resistor R9, a resistor R12, a resistor R14, a resistor R16, a light emitting diode D2, a fuse F3, a MOS transistor Q3, a MOS transistor Q5, a second power supply and a third power supply; the resistor R14 is connected in series with the resistor R16, the other end of the resistor R16 is grounded, the other end of the resistor R14 is connected with the gate of the MOS transistor Q5, one end of the fuse F3 is connected between the resistor R14 and the resistor R16, and the other end of the fuse F3 is connected with a second power supply; the resistor R9 is connected in series with the resistor R12, the other end of the resistor R9 is connected with a second power supply, the other end of the resistor R12 is connected with the gate of the MOS transistor Q3, and the drain of the MOS transistor Q5 is connected between the resistor R9 and the resistor R12; the resistor R6 is connected in series with the anode of the light-emitting diode D2, the other end of the resistor R6 is connected with a third power supply, and the cathode of the light-emitting diode D2 is connected with the gate of the MOS transistor Q3; the gates of the MOS transistor Q3 and the MOS transistor Q5 are grounded; the external power supply is connected between the resistor R14 and the resistor R16.

5. The intelligent hub circuit according to claim 3, wherein the overcurrent protection circuit is an NPN power detection protection circuit, and the NPN power detection protection circuit comprises a resistor R18, a resistor R24, a resistor R26, a light emitting diode D5, a fuse F6, a MOS transistor Q7, a second power supply and a third power supply; the resistor R24 is connected in series with the resistor R26, the other end of the resistor R24 is connected with a second power supply, one end of the fuse F6 is connected between the resistor R24 and the resistor R26, the other end of the resistor R26 is connected with the grid electrode of the MOS tube Q7, the resistor R18 is connected in series with the anode of the light-emitting diode D5, the cathode of the light-emitting diode D5 is connected with the drain electrode of the MOS tube Q7, and the other end of the fuse F6 and the source electrode of the MOS tube Q7 are both grounded; the external power supply is connected between the resistor R24 and the resistor R26.

6. An intelligent hub circuit according to claim 2, wherein the overall power indicator lamp circuit, the M groups of interface power indicator lamp circuits and the N groups of signal indicator lamps are all PNP type signal display circuits, and the PNP type signal display circuits include a resistor R10, a light emitting diode D1 and a fuse F1; one end of the fuse F1 is connected with the anode of the light emitting diode D1, the cathode of the light emitting diode D1 is connected with one end of the resistor R10, the other end of the resistor R10 is grounded, and two ends of the fuse F1 are both signal input and output ports.

7. An intelligent hub circuit according to claim 2, wherein the overall power indicator lamp circuit, the M groups of interface power indicator lamp circuits and the N groups of signal indicator lamps are NPN-type signal display circuits, and each NPN-type signal display circuit includes a resistor R20, a light emitting diode D6, a fuse F5 and a second power supply; the positive electrode of the light emitting diode D6 is connected with one end of the resistor R20, one end of the fuse F5 is connected with the negative electrode of the light emitting diode D6, the other end of the resistor R20 is connected with a second power supply, and two ends of the fuse F5 are both signal input and output ports.

8. An intelligent hub circuit according to claim 1, wherein M and N are positive integers.