Shenzhen Lianchengfa Technology Co., Ltd.

During the installation and use of LED display, correct wiring is a key step to ensure that the display works properly. Different types and specifications of the LED display in the wiring details may vary, but the overall wiring principle and method is common.LCF editor will introduce the LED display wiring method in this article.

First, the power supply wiring

(A)determine the power supply specifications

First of all, according to the power and voltage requirements of the LED display to select the appropriate power supply. Generally speaking, indoor small LED display may use 5V or 12V DC power supply, while outdoor large display may need higher voltage and power supply. The power of the power supply should meet the requirements of the normal operation of the display, and there should be a certain margin to ensure that there will not be problems due to insufficient power during a long period of operation.

(B) Connecting power input

Connect the mains power (usually 220V AC) to the input of the power adapter. In this step, you need to pay attention to whether the grounding of the power outlet is good to avoid electrical safety problems. During the connection process, make sure that the wires are firmly connected and that the plug fits tightly into the socket. For multiple displays or large display systems that may require multiple power supplies, it is important to reasonably distribute the load of the power supply to avoid overloading a particular power supply.

(C) Power output and display connection

The output (DC voltage end) of the power adapter is connected to the power input connector of the LED display. This is usually achieved through the power cable, and the plug of the cable should match the power interface of the display. Generally there will be a clear power input mark on the display, such as ‘+’ and ‘-’ indicates the positive and negative poles of the DC power supply, be sure to ensure that the polarity is correct when connecting, otherwise it may damage the display.

Second, Signal wiring

(A) choose the signal transmission method

LED display signal transmission method mainly has serial transmission and parallel transmission of two kinds. Serial transmission commonly used interface RS232, RS485, etc., this way of wiring is simple, suitable for long-distance transmission; parallel transmission is fast data transmission speed, but the wiring is relatively complex, commonly used in short distances, high speed requirements. According to the control distance of the display and performance requirements to choose the appropriate signal transmission method.

(B) connect the control card and send card

Control card is the core control component of LED display, it receives the signal from the sender card and controls the display. Send card is usually connected to the computer and other signal sources. Use the corresponding signal cable (such as network cable, DVI cable, etc.) to connect the output port of the sending card with the input port of the control card. If a network interface (e.g. RJ45 interface) is used for signal transmission, make sure that the core of the network cable is connected correctly, and the T568B standard is generally used.

(C) control card and display module connection

The control card needs to be connected to the various modules of the display to control the display of each pixel. This is achieved through the cable or other specialised signal lines. For display modules of different specifications, the interface types and pin definitions of the wires may be different. When making connections, carefully check the interface descriptions of the control card and display module to ensure that each signal cable is connected to the correct pin. For example, for some simple single or two-colour displays, only basic signals such as data lines and clock lines may need to be connected; while for full-colour displays, more signal lines are required to transmit data of different colours.

Third, grounding and lightning protection wiring

(A) Grounding

Good grounding is crucial for the safe and stable operation of LED display. Will display the metal shell, power supply ground through the grounding wire connected to the grounding system of the building. Grounding resistance should meet the requirements of the relevant standards, the general requirements of grounding resistance is less than 4 ohms. Grounding can prevent the accumulation of static electricity, reduce electromagnetic interference, and safeguard the safety of personnel and equipment in the event of electrical failure.

(B) lightning protection

For outdoor LED display, lightning protection measures are essential. Install a lightning protector on the power input line, and the grounding end of the lightning protector should be reliably connected to the grounding system. At the same time, for the signal line, you can also use the signal lightning protector for protection. When wiring, try to avoid parallel laying of signal lines and power lines to reduce the risk of lightning induction. If the display is installed in a high place or open area, you can also consider installing lightning rods and other lightning protection facilities to direct lightning to the earth and protect the display from lightning damage.

Fourth, Precautions

(A) line organisation and marking

After completing the wiring, the line should be organised to avoid cable clutter. You can use the wire channel, cable ties and other tools to fix and organise the cables, so that the wiring is neat and beautiful. At the same time, the different functions of the cable should be marked, such as labelling ‘power +’ ‘power -’ ‘signal input’ ‘signal output ’, etc., for subsequent maintenance and overhaul.

(B) Check before testing

Before powering up the LED display for testing, carefully check whether all the wiring is correct and firm. Check whether the power polarity is correct, whether the signal line is connected in place, whether the grounding is good and so on. Any wiring error may cause the display to not work properly or even damage the equipment.

(C) Professional operation

If you are not familiar with electrical wiring or have no relevant experience, it is recommended that a professional electrical engineer or a trained technician carry out the wiring operation of the LED display. Especially when dealing with high voltage mains and complex signalling systems, professional operation can avoid safety accidents and equipment damage caused by misuse.

LCF reminds you that the wiring of LED display needs to be taken seriously, from power wiring, signal wiring to grounding and lightning protection wiring, each link should be operated in strict accordance with the specifications and requirements to ensure that the display can run stably and safely, presenting users with wonderful visual effects.

The above is the LCF editorial to sort out the wiring of the LED display, I hope to help you, and welcome you to add or correct.LCF is a collection of R & D, intellectual, sales, operation, service in one of the national speciality and speciality new small giant enterprises, national high-tech enterprises. If you need to buy LED electronic display friends can also directly contact the LED display manufacturer LCF, the big country brand, trustworthy!