DMX512 data distribution line device

Abstract

The utility model discloses a DMX512 data distribution line device, comprising a housing which is provided with a power supply input port, a signal input port and a plurality of signal output ports; the plurality of signal processing modules are respectively connected with the power supply input port, the signal input port and one signal output port; the signal processing module comprises a communication circuit, a digital isolation circuit, a rear-end digital circuit, a lightning-proof and anti-static circuit and a power supply isolation circuit; the communication circuit, the digital isolation circuit, the rear-end digital circuit and the lightning protection and anti-static circuit are connected in sequence; the power supply isolation circuit is connected to the digital isolation circuit and the rear-end digital circuit; the communication circuit and the primary side of the digital isolation circuit are powered by a common VCC, and the secondary side of the digital isolation circuit and the rear-end digital circuit are powered by an isolation VCC. According to the DMX512 data distribution line device, each port signal of the controller is divided into a plurality of paths of isolation signals, faults among the plurality of paths do not influence each other, and each signal output can prevent lightning and static electricity.

Description

Technical Field

[0001] The utility model specifically relates to a DMX512 data distribution line device. Background Art

[0002] Indoor and outdoor LED landscape lighting projects require the application of LED controllers. LED controllers have multiple ports, and generally one port can carry up to 768 pixels. If one of the pixels fails, it may cause the entire port signal to fail. Utility Model Content

[0003] The utility model provides a DMX512 data distribution line device, which adopts the following technical solutions:

[0004] A DMX512 data distribution line device comprises: a shell, wherein the shell is provided with a power input port for connecting an external switching power supply, a signal input port for connecting an LED controller, and a plurality of signal output ports for outputting isolated signals, wherein each of the signal output ports is connected to a group of LED lamps to be controlled.

[0005] The DMX512 data distribution line device further comprises a plurality of signal processing modules, the signal processing modules are arranged in the housing, and each of the signal processing modules is respectively connected to the power input port, the signal input port and one of the plurality of signal output ports;

[0006] The signal processing module includes a communication circuit, a digital isolation circuit, a back-end digital circuit, a lightning protection and anti-static circuit, and a power supply isolation circuit;

[0007] The communication circuit, the digital isolation circuit, the back-end digital circuit and the lightning protection and anti-static circuit are connected in sequence;

[0008] The power supply isolation circuit is connected to the digital isolation circuit and the back-end digital circuit;

[0009] The communication circuit and the primary side of the digital isolation circuit are powered by a common VCC, the common VCC generates an isolated VCC through the power supply isolation circuit, and the secondary side of the digital isolation circuit and the back-end digital circuit are powered by an isolated VCC.

[0010] Furthermore, the power supply isolation circuit includes a PWM control circuit, a MOS tube Q1, a MOS tube Q2, a transformer T1, a diode D3 and a diode D4;

[0011] The gate of the MOS transistor Q1 and the gate of the MOS transistor Q2 are connected to the PWM control circuit, the source of the MOS transistor Q1 and the source of the MOS transistor Q2 are connected, the drain of the MOS transistor Q1 and the drain of the MOS transistor Q2 are respectively connected to the two ends of the first side of the transformer T1, the anode of the diode D3 and the anode of the diode D4 are respectively connected to the two ends of the second side of the transformer T1, the cathode of the diode D3 and the cathode of the diode D4 are connected, and the common VCC is connected to the first side of the transformer T1 and converted into the isolated VCC of the second side through the transformer T1.

[0012] Furthermore, the power supply isolation circuit also includes an input detection protection circuit, and the input detection protection circuit is connected to the PWM control circuit.

[0013] Furthermore, the power supply isolation circuit also includes an output detection protection circuit, and the output detection protection circuit is connected to the PWM control circuit.

[0014] Furthermore, the output detection protection circuit is connected to the PWM control circuit through a first optical coupling isolation module.

[0015] Furthermore, the power supply isolation circuit further includes a potential setting circuit, and the potential setting circuit is connected to the PWM control circuit.

[0016] Furthermore, the power supply isolation circuit is connected to the PWM control circuit through a second optical coupling isolation module.

[0017] Furthermore, the lightning protection and anti-static circuit comprises: a signal generation digital circuit, a signal transmission drive circuit 1, a signal transmission drive circuit 2, an output detection circuit 1, an output detection circuit 2, a discharge tube D1, a discharge tube D2, a resistor R1, an anti-surge resistor R2, a transient voltage suppressor TVS1, a transient voltage suppressor TVS2, a transient voltage suppressor TVS3, a MOS tube Q11 and a MOS tube Q12;

[0018] The source of the MOS tube Q11 and the source of the MOS tube Q12 are connected to the signal generating digital circuit, the drain of the MOS tube Q11 and the drain of the MOS tube Q12 are connected to the output port through the resistor R1 and the anti-surge resistor R2 respectively, the discharge tube D1 is connected to the side of the resistor R1 close to the output port, the discharge tube D2 is connected to the side of the anti-surge resistor R2 close to the output port, the two ends of the transient voltage suppressor TVS1 are respectively connected to the drain of the MOS tube Q11 and the drain of the MOS tube Q12, one end of the transient voltage suppressor TVS2 is grounded and the other end is connected to the drain of the MOS tube Q11, one end of the transient voltage suppressor TVS3 is grounded and the other end is connected to the drain of the MOS tube Q12, the two ends of the resistor R1 are respectively connected to the output detection circuit 1, and the two ends of the anti-surge resistor R2 are respectively connected to the output detection circuit 2.

[0019] Furthermore, the DMX512 data distribution line device includes eight signal output ports and eight signal processing modules.

[0020] The utility model is also beneficial in that the provided DMX512 data distribution line device divides each port signal of the controller into multiple isolated signals, the faults between the multiple signals do not affect each other, and each signal output can be lightning and static-proof. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a DMX512 data distribution circuit device provided by the utility model;

[0022] Figure 2 A schematic diagram of a signal processing module provided by the utility model;

[0023] Figure 3 The figure is a schematic diagram of the lightning protection and anti-static circuit provided by the utility model. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Examples of embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0026] like Figure 1A DMX512 data distribution line device of the present application is shown, comprising a housing. A power input port, a signal input port and a signal output port are provided on the housing. Among them, the power input port is used to connect an external switching power supply. The signal input port is used to connect an output end of an LED controller. The signal output port is used to output an isolated signal, and each signal output port is connected to a group of LED lights to be controlled. In an embodiment of the present application, the DMX512 data distribution line device comprises eight signal output ports. The DMX512 data distribution line device also comprises a plurality of signal processing modules, specifically eight. The signal processing module is arranged in the housing. Each signal processing module is respectively connected to the power input port, the signal input port and one of the plurality of signal output ports.

[0027] like Figure 2 As shown, the signal processing module includes a communication circuit, a digital isolation circuit, a back-end digital circuit, a lightning protection and anti-static circuit, and a power supply isolation circuit. Among them, the communication circuit, the digital isolation circuit, the back-end digital circuit, and the lightning protection and anti-static circuit are connected in sequence. The power supply isolation circuit is connected to the digital isolation circuit and the back-end digital circuit. The communication circuit and the digital isolation circuit are powered by a common VCC on the primary side, and the common VCC generates an isolated VCC through the power supply isolation circuit. The secondary side of the digital isolation circuit and the back-end digital circuit are powered by an isolated VCC. The unisolated signals S1-S8 need to be processed by the communication circuit for protocol processing and then pass through the digital isolation circuit. The digital isolation circuit isolates the signal and forwards it to the back-end digital circuit. The output signal of the back-end digital circuit is protected by lightning protection and anti-static protection at the output port.

[0028] As a preferred implementation, the power supply isolation circuit includes a PWM control circuit, a MOS tube Q1, a MOS tube Q2, a transformer T1, a diode D3 and a diode D4. Specifically, the gate of the MOS tube Q1 and the gate of the MOS tube Q2 are connected to the PWM control circuit, the source of the MOS tube Q1 and the source of the MOS tube Q2 are connected, the drain of the MOS tube Q1 and the drain of the MOS tube Q2 are respectively connected to the two ends of the first side of the transformer T1, the positive electrode of the diode D3 and the positive electrode of the diode D4 are respectively connected to the two ends of the second side of the transformer T1, the negative electrode of the diode D3 and the negative electrode of the diode D4 are connected, and the common VCC is connected to the first side of the transformer T1 and converted to the isolated VCC on the second side through the transformer T1. The power supply isolation circuit adopts a transformer isolation method, and the power supply topology adopts a program-controlled push-pull topology.

[0029] As a preferred embodiment, the power supply isolation circuit also includes an input detection protection circuit, which is connected to the PWM control circuit. The program monitors the input voltage and signal conditions, and outputs a signal to the PWM control circuit when normal. The power supply isolation circuit also includes an output detection protection circuit and a potential setting circuit, and both the output detection protection circuit and the potential setting circuit are connected to the PWM control circuit. Among them, the output detection protection circuit is connected to the PWM control circuit through a first optocoupler isolation module. The power supply isolation circuit is connected to the PWM control circuit through a second optocoupler isolation module. The output voltage setting, output overcurrent, short circuit and other protection signals are isolated to the primary side through optocouplers. The PWM control circuit controls Q1 and Q2 to turn on and off.

[0030] like Figure 3 As shown, as a preferred embodiment, the lightning protection and anti-static circuit includes: a signal generating digital circuit, a signal transmission driving circuit 1, a signal transmission driving circuit 2, an output detection circuit 1, an output detection circuit 2, a discharge tube D1, a discharge tube D2, a resistor R1, an anti-surge resistor R2, a transient voltage suppressor TVS1, a transient voltage suppressor TVS2, a transient voltage suppressor TVS3, a MOS tube Q11 and a MOS tube Q12. Among them, the source of the MOS tube Q11 and the source of the MOS tube Q12 are connected to the signal generating digital circuit, the drain of the MOS tube Q11 and the drain of the MOS tube Q12 are connected to the output port through the resistor R1 and the anti-surge resistor R2 respectively, the discharge tube D1 is connected to the side of the resistor R1 close to the output port, the discharge tube D2 is connected to the side of the anti-surge resistor R2 close to the output port, the two ends of the transient voltage suppressor TVS1 are respectively connected to the drain of the MOS tube Q11 and the drain of the MOS tube Q12, one end of the transient voltage suppressor TVS2 is grounded and the other end is connected to the drain of the MOS tube Q11, one end of the transient voltage suppressor TVS3 is grounded and the other end is connected to the drain of the MOS tube Q12, the two ends of the resistor R1 are respectively connected to the output detection circuit 1, and the two ends of the anti-surge resistor R2 are respectively connected to the output detection circuit 2.

[0031] Specifically, the lightning protection and anti-static circuit of the output port adopts three-level protection. The first level uses a discharge tube to absorb most of the lightning surge energy. The second level protection uses a transient voltage suppressor TVS to suppress the high-speed surge energy escaping from the first level protection circuit, and at the same time detects the current passing through the second level protection circuit through a current sampling circuit. When the current passing through the second level protection circuit exceeds the protection threshold, the third level protection turns off the MOS tube.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the above embodiments do not limit the utility model in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the utility model.

Claims

1. A DMX512 data distribution line device, characterized in that: It comprises: a housing, wherein the housing is provided with a power input port for connecting an external switching power supply, a signal input port for connecting an LED controller, and a plurality of signal output ports for outputting isolated signals, each of the signal output ports being connected to a group of LED lamps to be controlled; The DMX512 data distribution line device further comprises a plurality of signal processing modules, the signal processing modules are arranged in the housing, and each of the signal processing modules is respectively connected to the power input port, the signal input port and one of the plurality of signal output ports; The signal processing module includes a communication circuit, a digital isolation circuit, a back-end digital circuit, a lightning protection and anti-static circuit, and a power supply isolation circuit; The communication circuit, the digital isolation circuit, the back-end digital circuit and the lightning protection and anti-static circuit are connected in sequence; The power supply isolation circuit is connected to the digital isolation circuit and the back-end digital circuit; The communication circuit and the primary side of the digital isolation circuit are powered by a common VCC, the common VCC generates an isolated VCC through the power supply isolation circuit, and the secondary side of the digital isolation circuit and the back-end digital circuit are powered by an isolated VCC.

2. The DMX512 data distribution line device according to claim 1, characterized in that: The power supply isolation circuit includes a PWM control circuit, a MOS tube Q1, a MOS tube Q2, a transformer T1, a diode D3 and a diode D4; The gate of the MOS transistor Q1 and the gate of the MOS transistor Q2 are connected to the PWM control circuit, the source of the MOS transistor Q1 and the source of the MOS transistor Q2 are connected, the drain of the MOS transistor Q1 and the drain of the MOS transistor Q2 are respectively connected to the two ends of the first side of the transformer T1, the anode of the diode D3 and the anode of the diode D4 are respectively connected to the two ends of the second side of the transformer T1, the cathode of the diode D3 and the cathode of the diode D4 are connected, and the common VCC is connected to the first side of the transformer T1 and converted into the isolated VCC of the second side through the transformer T1.

3. The DMX512 data distribution line device according to claim 2, characterized in that: The power supply isolation circuit further includes an input detection protection circuit, and the input detection protection circuit is connected to the PWM control circuit.

4. The DMX512 data distribution line device according to claim 2, characterized in that: The power supply isolation circuit further includes an output detection protection circuit, and the output detection protection circuit is connected to the PWM control circuit.

5. The DMX512 data distribution line device according to claim 4, characterized in that: The output detection protection circuit is connected to the PWM control circuit through a first optical coupling isolation module.

6. The DMX512 data distribution line device according to claim 2, characterized in that: The power supply isolation circuit further includes a potential setting circuit, and the potential setting circuit is connected to the PWM control circuit.

7. The DMX512 data distribution line device according to claim 6, characterized in that: The power supply isolation circuit is connected to the PWM control circuit through a second optical coupling isolation module.

8. The DMX512 data distribution line device according to claim 1, characterized in that: The lightning protection and anti-static circuit comprises: a signal generation digital circuit, a signal transmission drive circuit 1, a signal transmission drive circuit 2, an output detection circuit 1, an output detection circuit 2, a discharge tube D1, a discharge tube D2, a resistor R1, an anti-surge resistor R2, a transient voltage suppressor TVS1, a transient voltage suppressor TVS2, a transient voltage suppressor TVS3, a MOS tube Q11 and a MOS tube Q12; The source of the MOS tube Q11 and the source of the MOS tube Q12 are connected to the signal generating digital circuit, the drain of the MOS tube Q11 and the drain of the MOS tube Q12 are connected to the output port through the resistor R1 and the anti-surge resistor R2 respectively, the discharge tube D1 is connected to the side of the resistor R1 close to the output port, the discharge tube D2 is connected to the side of the anti-surge resistor R2 close to the output port, the two ends of the transient voltage suppressor TVS1 are respectively connected to the drain of the MOS tube Q11 and the drain of the MOS tube Q12, one end of the transient voltage suppressor TVS2 is grounded and the other end is connected to the drain of the MOS tube Q11, one end of the transient voltage suppressor TVS3 is grounded and the other end is connected to the drain of the MOS tube Q12, the two ends of the resistor R1 are respectively connected to the output detection circuit 1, and the two ends of the anti-surge resistor R2 are respectively connected to the output detection circuit 2.

9. The DMX512 data distribution line device according to claim 1, characterized in that: The DMX512 data distribution line device comprises eight signal output ports and eight signal processing modules.

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