LED indicating circuit of terminal block

Abstract

The utility model relates to wiring base circuit error correction technical field especially relates to a wiring base's LED indicating circuit. It includes live wire end L, zero line end N and ground terminal PE, zero line end first series connection one reverse diode D1 after again with live wire end between the connection has LED indicating circuit, LED indicating circuit including LED red light warning circuit and LED green light indicating circuit, LED red light warning circuit and LED green light indicating circuit are parallel connection connection. The utility model provides clear visual feedback for the installer, so that the installer or customer can clearly know whether the wiring of the wiring base is correct, provides convenience for customer engineering acceptance, increases the good use experience of user, improves the use safety of wiring base.

Description

Technical Field

[0001] This utility model relates to the field of power supply circuit technology, and in particular to an LED indicator circuit for a terminal block. Background Technology

[0002] During the installation of switch products, existing technical solutions all involve wiring status detection and feedback mechanisms, and include protective designs to prevent incorrect connections. However, existing technologies focus more on the physical connection structure than on status indication. They do not consider the detection of the correctness of the wiring after the customer has connected the wires, lack clear status indication functions, and lack grounding detection functions—missing connection warning functions. This often leads to misjudgments by users when wiring errors occur, directly affecting the user's convenience and safety. Utility Model Content

[0003] To address the technical problem of easy misjudgment in the wiring of existing terminal blocks, this utility model provides an LED indicator circuit for a terminal block with LED indicator light visual feedback.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: an LED indicator circuit for a terminal block, including a live wire terminal L, a neutral wire terminal N, and a ground terminal PE. The neutral wire terminal is first connected in series with a reverse diode D1, and then the LED indicator circuit is connected between the neutral wire terminal and the live wire terminal. The LED indicator circuit includes an LED red warning circuit and an LED green indicator circuit, and the LED red warning circuit and the LED green indicator circuit are connected in parallel.

[0005] Further: In the LED indicator circuit of the aforementioned terminal block, the LED red warning circuit includes a Zener diode ZD1 and LED1 connected in series, with LED1 connected in reverse series, and a storage capacitor C1 connected in parallel across the two ends of LED1. The red warning circuit also includes a voltage divider resistor R4 connected in series.

[0006] The LED green light indicator circuit includes a transistor Q1 and an LED2 connected in series. The emitter of transistor Q1 is connected to the live wire, and the collector of transistor Q1 is connected in series with the reverse-biased LED2. A forward-biased diode D2 is connected in parallel across LED2. The base of the transistor is connected in series with a resistor R6 and then to ground (PE). A resistor R7 is also connected between the base of transistor Q1 and the live wire. The green light indicator circuit also includes a voltage divider resistor R5 connected in series.

[0007] Furthermore, in the LED indicator circuit of the aforementioned terminal block, resistors R3, R2, and R1 are connected in series between the LED indicator circuit and the reverse diode D1. Compared with existing technologies, the LED indicator circuit of the above-mentioned terminal block includes a live wire terminal (L), a neutral wire terminal (N), and a ground terminal (PE). A reverse diode (D1) is first connected in series with the neutral wire terminal before the LED indicator circuit is connected between it and the live wire terminal. The LED indicator circuit includes a red LED warning circuit and a green LED indicator circuit, which are connected in parallel. When the terminal block is properly wired, the live wire, neutral wire, and ground wire are connected to the corresponding live wire terminal (L), neutral wire terminal (N), and ground terminal (PE) of the terminal block, and LED2 (green light) illuminates, indicating correct wiring. When the live wire and neutral wire are connected to the corresponding live wire terminal (L) and neutral wire terminal (N) of the terminal block, and the ground terminal (PE) is missing or not connected, LED1 (red light) illuminates, indicating incorrect wiring. When the live wire is connected to the corresponding neutral wire terminal (N) of the terminal block, and the neutral wire is connected to the corresponding live wire terminal (L), i.e., the live and neutral wires are reversed, and the ground wire is correctly connected, LED1 (red light) illuminates, indicating incorrect wiring. This invention provides installers with clear visual feedback, enabling installers or customers to clearly know whether the wiring of the terminal block is correct, facilitating customer project acceptance, increasing user experience, and improving the safety of the terminal block. Attached Figure Description

[0008] Figure 1 This is a circuit diagram illustrating the working principle of the LED indicator circuit in the terminal block of this utility model. Figure 2 An exploded view showing an application example of the LED indicator circuit of the terminal block of this utility model; The components include: 1 LED PCBA assembly, 2 terminal block module assembly, 3 power spring, 4 terminal block fixing screws, and 5 terminal block panel. Detailed Implementation

[0009] To facilitate understanding by those skilled in the art, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0010] Example: Refer to Figure 1 An LED indicator circuit for a terminal block includes a live wire terminal L, a neutral wire terminal N, and a ground terminal PE. The neutral wire terminal is first connected in series with a reverse diode D1, and then the LED indicator circuit is connected between the neutral wire terminal and the live wire terminal. The LED indicator circuit includes an LED red warning circuit and an LED green indicator circuit, which are connected in parallel.

[0011] The LED red warning light circuit includes a Zener diode ZD1 and an LED1 connected in series, with the LED1 connected in reverse series. A storage capacitor C1 is connected in parallel across the two ends of the LED1. The red warning light circuit also includes a voltage divider resistor R4 connected in series.

[0012] The LED green light indicator circuit includes a transistor Q1 and an LED2 connected in series. The emitter of transistor Q1 is connected to the live wire, and the collector of transistor Q1 is connected in series with the reverse-biased LED2. A forward-biased diode D2 is connected in parallel across LED2. The base of the transistor is connected in series with a resistor R6 and then to ground (PE). A resistor R7 is also connected between the base of transistor Q1 and the live wire. The green light indicator circuit also includes a voltage divider resistor R5 connected in series.

[0013] The indicator circuit is connected in series with resistors R3, R2 and R1.

[0014] Application example: such as Figure 2 The LED indicator circuit of the terminal block in the above embodiment is etched onto the front and back sides of the printed circuit board. The required electronic components are soldered onto the printed circuit board using PCB soldering technology to achieve electrical connection between the components and the PCB, forming LED PCBA assembly 1. After the LED PCBA assembly 1 is snapped into the terminal block module assembly 2, the LED PCBA assembly 1 is connected to the terminal block module assembly 2 through the power spring 3, and then fixed to the terminal block panel 5 by the terminal block fixing screw 4.

[0015] When the terminal block is properly wired, the live wire, neutral wire, and grounding wire are connected to the corresponding live wire terminal (L), neutral wire terminal (N), and grounding terminal (PE) of the terminal block. LED2 (green) illuminates, indicating correct wiring. If the live wire and neutral wire are connected to the corresponding live wire terminal (L) and neutral wire terminal (N) of the terminal block, but the grounding terminal (PE) is missing or not connected, LED1 (red) illuminates, indicating incorrect wiring. If the live wire is connected to the corresponding neutral wire terminal (N) of the terminal block, and the neutral wire is connected to the corresponding live wire terminal (L), i.e., the live and neutral wires are reversed, but the grounding wire is correctly connected, LED1 (red) illuminates, indicating incorrect wiring. This invention provides installers with clear visual feedback, allowing installers or customers to clearly understand whether the terminal block wiring is correct, facilitating project acceptance and enhancing the user experience.

[0016] The above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An LED indicator circuit for a terminal block, comprising a live wire terminal L, a neutral wire terminal N, and a ground terminal PE, characterized in that: The neutral wire terminal is first connected in series with a reverse diode D1, and then an LED indicator circuit is connected between it and the live wire terminal. The LED indicator circuit includes an LED red warning circuit and an LED green indicator circuit, which are connected in parallel.

2. The LED indicator circuit of the terminal block according to claim 1, characterized in that: The LED red light warning circuit includes a Zener diode ZD1 and an LED1 connected in series. The LED1 is connected in reverse series, and a storage capacitor C1 is connected in parallel across the two ends of the LED1.

3. The LED indicator circuit of the terminal block according to claim 2, characterized in that: The red light warning circuit also has a voltage divider resistor R4 connected in series.

4. The LED indicator circuit of the terminal block according to claim 3, characterized in that: The LED green light indicator circuit includes a transistor Q1 and an LED2 connected in series. The emitter of transistor Q1 is connected to the live wire, the collector of transistor Q1 is connected in series with the reverse LED2, and a forward diode D2 is connected in parallel across the two ends of LED2.

5. The LED indicator circuit of the terminal block according to claim 4, characterized in that: The base of the transistor is connected in series with resistor R6 and then connected to the ground terminal PE.

6. The LED indicator circuit of the terminal block according to claim 5, characterized in that: A resistor R7 is also connected between the base of transistor Q1 and the live wire.

7. The LED indicator circuit of the terminal block according to claim 6, characterized in that: The green light indicator circuit also has a voltage divider resistor R5 connected in series.

8. The LED indicator circuit of the terminal block according to any one of claims 1-7, characterized in that: The LED indicator circuit is connected in series with resistors R3, R2, and R1.

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