Abstract: are typically installed outdoor LED display area is larger, and mostly installed in personnel intensive place, its steel structure design should consider basic, wind load, waterproof, dustproof, moisture, temperature, lightning protection, the surrounding population density, and many other factors.Inside the steel structure at the same time also need to place the power distribution cabinet, air conditioning, axial flow fan, lighting and other auxiliary equipment, also have., maintenance facilities such as gym.So in implementation, the whole steel structure should be through the government department in charge of outdoor screen after the design drawing to ensure the safety in the whole steel structure and reliable.
The steel structure
Are typically installed outdoor LED display area is larger, and mostly installed in personnel intensive place, its steel structure design should consider basic, wind load, waterproof, dustproof, moisture, temperature, lightning protection, the surrounding population density, and many other factors.Inside the steel structure at the same time also need to place the power distribution cabinet, air conditioning, axial flow fan, lighting and other auxiliary equipment, also have., maintenance facilities such as gym.So in implementation, the whole steel structure should be through the government department in charge of outdoor screen after the design drawing to ensure the safety in the whole steel structure and reliable.
Outdoor LED display is installed outdoors, and often, the wind dust cover, poor working conditions, electronic equipment is wet or seriously be affected with damp be affected with damp will cause a short circuit or even fire, fault and even fire, loss;So the screen and the screen body and the junction must be strictly waterproof leakage protection;Screen should have good drainage measures, in the event of water discharge smoothly;Pay attention to waterproof, moistureproof.
Outdoor LED display should install ventilation cooling equipment, makes the screen body internal temperature in - 10 ℃ to 40 ℃.Behind the screen installed above the axial flow fan exhaust heat;Outdoor LED display itself will generate a certain amount of heat at work, if the environment temperature and heat dissipation, integrated circuit may not work properly, and even destroyed, so that the LED display system cannot work normally.
Lightning protection grounding

Electronic integration in outdoor LED display is high, the sensitivity against interference is becoming more and more demanding.Lightning can harm display system by various means, in general, it may be directly hit the screen body and then into the ground by the grounding device.In the lightning current through the machine, electricity, heat damage.Solution is equipotential connection, is not grounded or not good grounding of metal shell, the metal sheath of the cable, the metal frame inside the screen connected with reliable grounding device welding, prevent on these items as a result of induced high voltage or lightning on grounding device into high voltage relay cause overvoltage of equipment internal insulation, cable core.Outdoor LED display also will be affected by the heavy current of lightning caused strong magnetic attacks, to make the large current timely discharge caused by lightning, reduce appeared on the equipment of overvoltage, limit the lightning invasion wave.Usually should be installed on the screen and building lightning protection devices.
Outdoor LED display ground should consider its grounding form respectively according to the specific situation;When the screen is independent setting, should set up a separate grounding systems, grounding resistance should not be greater than 4 ohm;When the screen is attached on the wall outside the building, and display the main body and the shell and building good grounding, and building public comprehensive grounding, grounding resistance should not be greater than 1 ohm.
Power supply system
LED outdoor display generally USES AC220V current power supply, power grid voltage fluctuation is less than 10%, and provide a good grounding system.For electricity power for more than 10 kw display, should be equipped with special distribution cabinets.Can choose according to need has the function of remote control with PLC control of power distribution cabinets, distribution cabinets more intelligent with PLC control functions, can be used in LCD controller within the remote operation of outdoor LED display screen and the switch of air conditioning, fan and other equipment, as well as within the panel on environmental temperature real-time monitoring, environment outside the screen brightness, and the corresponding alarm information.In the LED outdoor screen, generally poor environmental conditions, it is recommended to use with PLC control power distribution cabinet;In indoor screen project, environment is good, and the space is limited, can not add PLC control.

In order to prevent leakage fire, at the main switch power supply into line shall also furnish fire leakage switch.In power distribution cabinet LCD controller monitoring interface to display the real-time temperature display.Automatic condition, when the screen body temperature over 65 degrees, monitor screen will prompt temperature is exorbitant, LCD controller sends out alarm at the same time, the system will automatically power cuts, in case of fire.According to the actual situation in the smoke detectors installed in the display. When the screen is the fire occurs, the monitoring interface will also have the corresponding prompt information, as well as linkage power distribution system will be automatically.