Intelligent doubling and checking device for weak current circuit

Abstract

The utility model discloses a weak current line intelligent doubling troubleshooting device, which comprises a first MBUS master equipment connecting end, a second MBUS master equipment connecting end, an MBUS slave equipment connecting end, a rectifier, a voltage stabilizer and a relay, the first MBUS main equipment connecting end is connected with the control end of the relay through the rectifier and the voltage stabilizer in sequence; the relay controls the connection relation among the MBUS slave device connection end, the first MBUS master device connection end and the second MBUS master device connection end. And when the control end of the relay receives a voltage signal, the common connection end is communicated with the first connection end, otherwise, the common connection end is communicated with the second connection end. The MBUS debugging device is provided with the two MBUS main equipment connecting ends, communication connection between the debugging device and the temperature control panel can be established without clearing and changing lines when the lines have faults and need to be checked, the operation efficiency is improved, and meanwhile, the equipment can be prevented from being damaged by large current and short circuit.

Description

Technical Field

[0001] The utility model relates to a weak current line troubleshooting device. Background Art

[0002] With the development of intelligent building technology, residents' second-network control equipment is becoming increasingly diversified. Existing second-network control equipment includes valve controllers, household regulating valves and temperature control panels, which are connected through the MBUS bus.

[0003] Since the temperature control panel needs to be installed indoors, when the valve controller cannot receive information from the resident's regulating valve and temperature control panel, the staff needs to go to the house for investigation. During the investigation, they need to remove and modify the wires, and then connect the debugging device to the temperature control panel. The operation is cumbersome and the workload is large.

[0004] On the other hand, due to residents' unauthorized wiring changes or rewiring during renovations, voltages greater than 36V are often mistakenly connected to the temperature panel and the MBUS bus is short-circuited, causing damage to the temperature panel or even other devices on the bus. Utility Model Content

[0005] The utility model proposes an intelligent parallel checking device for weak current lines, the purposes of which are: 1. solving the problem of cumbersome operation of checking bus connection at home; 2. preventing improper wiring from damaging devices on the MBUS bus.

[0006] The technical solution of this utility model is as follows:

[0007] A device for intelligent parallel checking of weak current lines, comprising a first MBUS master device connection terminal, a second MBUS master device connection terminal and an MBUS slave device connection terminal, and also comprising a rectifier, a voltage stabilizer and a relay;

[0008] The first MBUS master device connection end is connected to the control end of the relay through a rectifier and a voltage stabilizer in sequence;

[0009] The relay is also provided with a common connection end, a first connection end and a second connection end. The common connection end is connected to the MBUS slave device connection end through a protection circuit, the first connection end is connected to the first MBUS master device connection end, and the second connection end is connected to the second MBUS master device connection end. When the control end of the relay receives a voltage signal, the common connection end is connected to the first connection end, otherwise the common connection end is connected to the second connection end.

[0010] As a further improvement of the intelligent parallel checking device for weak current lines: the two endpoints of the common connection end are correspondingly connected to the two endpoints of the MBUS slave device connection end through two lines; the protection circuit includes fuses respectively arranged on the two lines.

[0011] As a further improvement of the intelligent paralleling troubleshooting device for weak current lines: the two endpoints of the common connection end are correspondingly connected to the two endpoints of the MBUS slave device connection end through two lines; the protection circuit includes a bidirectional transient voltage suppression diode T1 respectively connected between the two lines.

[0012] As a further improvement of the intelligent parallel connection troubleshooting device for weak current lines: the output end of the rectifier is also connected to a unidirectional transient voltage suppression diode TVS1, the cathode of the unidirectional transient voltage suppression diode TVS1 is connected to the positive output end of the rectifier, and the anode is connected to the rectifier.

[0013] As a further improvement of the intelligent paralleling troubleshooting device for weak-current lines: the voltage output end of the voltage stabilizer is connected to the ground end through a light-emitting diode D1 and a resistor R2.

[0014] As a further improvement of the intelligent parallel connection troubleshooting device for weak current lines: two parallel indicator light circuits are provided between the two end points of the second connection end, one indicator light circuit includes a series resistor R3 and a light-emitting diode D4, and the other indicator light circuit includes a series resistor R4 and a light-emitting diode D3, and the directions of the light-emitting diode D3 and the light-emitting diode D4 are opposite.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model has two MBUS master device connection terminals. When installed normally, the bus introduced into the room is connected to the second MBUS master device connection terminal, and the MBUS slave device connection terminal is connected to the temperature control panel. When a line fault occurs and needs to be checked, the staff only needs to connect the debugging device to the first MBUS master device connection terminal, and the relay automatically disconnects the second MBUS master device connection terminal and connects the first MBUS master device connection terminal to the MBUS slave device connection terminal, thereby eliminating the need to remove or change the wires, thereby improving the operating efficiency.

[0017] 2. A protection circuit is provided between the common connection terminal and the MBUS slave device connection terminal to prevent damage to the devices on the bus due to misconnection of large currents, short circuits, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the circuit principle diagram of the utility model;

[0019] Figure 2 This is the installation wiring diagram of the utility model. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments.

[0021] like Figure 1 , a weak current line intelligent paralleling troubleshooting device, including a shell made of flame retardant material, the shell is provided with a first MBUS master device connection terminal, a second MBUS master device connection terminal and an MBUS slave device connection terminal. The circuit part inside the shell includes a rectifier, a voltage stabilizer and a relay.

[0022] The first MBUS master device connection end is connected to the control end of the relay through a rectifier and a voltage stabilizer in sequence.

[0023] In this embodiment, the rectifier is an MB6S rectifier bridge, which can convert a signal without positive or negative polarity distinction at the first MBUS master device connection end into a power supply signal with clear positive and negative polarity.

[0024] Furthermore, a thermistor is connected to the positive output terminal of the rectifier to limit the large current impact caused by abnormal power supply and perform current limiting protection.

[0025] Furthermore, the output end of the rectifier is also connected to a unidirectional transient voltage suppression diode TVS1, the cathode of the unidirectional transient voltage suppression diode TVS1 is connected to the positive output end of the rectifier, and the positive electrode is connected to the rectifier.

[0026] In this embodiment, the voltage stabilizer model is 78M12, which provides a stable voltage for the control end of the relay.

[0027] Furthermore, the voltage output terminal of the voltage regulator is connected to the ground terminal through the light emitting diode D1 and the resistor R2.

[0028] The relay is further provided with a common connection terminal, a first connection terminal and a second connection terminal, the common connection terminal is connected to the MBUS slave device connection terminal through a protection circuit, the first connection terminal is connected to the first MBUS master device connection terminal, and the second connection terminal is connected to the second MBUS master device connection terminal. When the control terminal of the relay receives a voltage signal, the common connection terminal is connected to the first connection terminal, that is, the first MBUS master device connection terminal is connected to the MBUS slave device connection terminal, otherwise the common connection terminal is connected to the second connection terminal, that is, the second MBUS master device connection terminal is connected to the MBUS slave device connection terminal.

[0029] Furthermore, the two endpoints of the common connection end are correspondingly connected to the two endpoints of the MBUS slave device connection end through two lines. The protection circuit includes fuses FUSE and FUSE2 respectively arranged on the two lines. The fuse is used to prevent residents from accessing AC220V. If only the neutral wire is blown, the live wire will still enter the MBUS bus, and even bring the live wire into other residents' homes with normal wiring, causing safety hazards. Selecting a 32mA 250V specification fuse can ensure that whether it is a high-current 220V mains or a short circuit in the MBUS line itself, the fuse can be blown, and the MBUS communication will not be affected under normal wiring conditions. The protection circuit also includes a bidirectional transient voltage suppression diode T1 respectively connected between the two lines. When a large current is connected, the bidirectional transient voltage suppression diode T1 will automatically break down and clamp the voltage at 36V.

[0030] Furthermore, two parallel indicator light circuits are provided between the two end points of the second connection end, one indicator light circuit includes a resistor R3 and a light-emitting diode D4 connected in series, and the other indicator light circuit includes a resistor R4 and a light-emitting diode D3 connected in series, and the directions of the light-emitting diode D3 and the light-emitting diode D4 are opposite.

[0031] like Figure 1 and 2 During normal installation, the bus introduced into the room is connected to the second MBUS master device connection terminal, and the MBUS slave device connection terminal is connected to the temperature control panel.

[0032] When a line fault needs to be checked, the staff only needs to connect the debugging device to the first MBUS master device connection terminal. At this time, the changing voltage signal output by the debugging device becomes a stable voltage signal after passing through the rectifier and the voltage regulator. After receiving the voltage signal, the control end of the relay controls the switch state to change, automatically disconnecting the second MBUS master device connection terminal and connecting the first MBUS master device connection terminal with the MBUS slave device connection terminal. The operator can quickly establish a communication connection between the debugging device and the temperature control panel without removing or changing the wires. At this time, the light-emitting diode D1 lights up.

[0033] After debugging is completed, disconnect the debugging equipment, the rectifier and voltage regulator no longer output voltage signals, the LED D1 goes out, the relay switches back to the initial state, and the second MBUS master device connection end is connected to the MBUS slave device connection end, so that the temperature control panel automatically connects to the MBUS bus at the home. When the temperature control panel communicates, the LEDs D3 and D4 flash according to the signal status to indicate the communication status.

[0034] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. The scope of the present invention is defined by the claims rather than the above description.

Claims

1. A device for intelligent parallel checking of weak current lines, characterized by: It includes a first MBUS master device connection terminal, a second MBUS master device connection terminal and an MBUS slave device connection terminal, and also includes a rectifier, a voltage stabilizer and a relay; The first MBUS master device connection end is connected to the control end of the relay through a rectifier and a voltage stabilizer in sequence; The relay is also provided with a common connection end, a first connection end and a second connection end. The common connection end is connected to the MBUS slave device connection end through a protection circuit, the first connection end is connected to the first MBUS master device connection end, and the second connection end is connected to the second MBUS master device connection end. When the control end of the relay receives a voltage signal, the common connection end is connected to the first connection end, otherwise the common connection end is connected to the second connection end.

2. The intelligent parallel checking device for weak current lines according to claim 1, characterized in that: The two endpoints of the common connection end are correspondingly connected to the two endpoints of the MBUS slave device connection end through two lines; the protection circuit includes fuses respectively arranged on the two lines.

3. The intelligent parallel checking device for weak current lines according to claim 1, characterized in that: The two endpoints of the common connection end are correspondingly connected to the two endpoints of the MBUS slave device connection end through two lines; the protection circuit includes a bidirectional transient voltage suppression diode T1 respectively connected between the two lines.

4. The intelligent parallel checking device for weak current lines according to claim 1, characterized in that: The output end of the rectifier is also connected to a unidirectional transient voltage suppression diode TVS1, the cathode of the unidirectional transient voltage suppression diode TVS1 is connected to the positive output end of the rectifier, and the positive electrode is connected to the rectifier.

5. The intelligent parallel checking device for weak current lines according to any one of claims 1 to 4, characterized in that: The voltage output terminal of the voltage regulator is connected to the ground terminal through the light emitting diode D1 and the resistor R2.

6. The intelligent parallel checking device for weak current lines according to any one of claims 1 to 4, characterized in that: Two parallel indicator light circuits are provided between the two end points of the second connection end. One indicator light circuit includes a resistor R3 and a light emitting diode D4 connected in series, and the other indicator light circuit includes a resistor R4 and a light emitting diode D3 connected in series. The directions of the light emitting diode D3 and the light emitting diode D4 are opposite.

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