There are many options for power distribution of outdoor large LED display screens, each with its own characteristics and applicable scenarios. The following is a detailed introduction to several common power distribution methods:
1. PLC control power supply system
Features and functions:
Intelligent control: PLC (programmable logic controller) control power supply system can realize remote operation and real-time monitoring.
Through the LCD controller, the switch of LED display screen and air conditioner, fan and other equipment in the screen can be remotely operated.
Real-time monitoring and alarm: The system can monitor the ambient temperature, fire situation and ambient brightness outside the screen in real time, and issue alarm information in abnormal situations.
Applicable scenarios: Especially suitable for projects with poor outdoor environment and high requirements for monitoring and management.
Advantages:
* Improve management efficiency and reduce manual intervention.
* Real-time monitoring and alarm functions help to detect and deal with potential problems in time.
2. Hierarchical power distribution cabinet
Features and functions:
Protect the power grid: For outdoor large LED display screens with peak power exceeding 20KW, it is recommended to use a distributed power distribution cabinet with step-by-step power-on function. This type of distribution cabinet can reduce the impact on the power grid when the high-power display screen is started.
Overload and short circuit protection: The power distribution cabinet can provide power-off protection when the circuit is short-circuited, overloaded, or leaking, ensuring the safety of electrical equipment and personnel.
Applicable scenarios:
* All outdoor LED display screen projects that require high-power power supply.
* Scenarios with high requirements for grid stability.
3. Remote communication method
Communication method selection:
Short-distance communication: When the communication distance is within 1.2 kilometers, RS422/RS232 communication modules can be installed.
Long-distance communication: If the communication distance is several kilometers or even dozens of kilometers, optical fiber communication should be used, and the communication modules at both ends of the PLC and the computer should be replaced with optical fiber RS232 converters.
Features and functions:
Strong flexibility: Select the appropriate communication method according to the different communication distances to ensure the stability and reliability of data transmission.
Good scalability: Provide convenience for future system upgrades and expansions.
4. Other power distribution methods
In addition to the above two main power distribution methods, the power distribution method of outdoor large LED display screens can also be customized according to specific needs and scenarios. For example:
Multi-function card distribution cabinet: It has multiple control functions and protection mechanisms and is suitable for complex application scenarios.
Microcomputer time-controlled distribution cabinet: It can automatically control the on/off time of the display screen according to the preset schedule to improve management efficiency.
Distribution cabinets of different materials: such as stainless steel type, cold-rolled steel plate type, etc., to meet the use requirements under different environmental conditions.
Summary
There are various power distribution methods for large outdoor LED displays.
Choosing a suitable power distribution method is crucial to ensure the normal operation of the display screen, improve management efficiency, and protect electrical equipment and personal safety.
When choosing a power distribution method, factors such as the power demand of the display screen, the use environment, the communication distance, and the budget should be comprehensively considered.