QL484IT

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Detailed information about QL484IT Discrete LED indicators covers applications and the working principle. Discrete LED indicators are used for ‘ON’, ‘OFF’ or status indicating.

Applications

QL484-IT Discrete LED Indicators are ideal for a wide range of applications, including:

• Instrument panels to indicate system status.
• Indicator LEDS alarms to indicate system faults.
• Route boards for train timetables.
• Clocks for stadiums, airports, railway stations and bus terminals.
• Displays in escalators.
• Machinery or equipment status indication.
• Manufacturing, test and measurement control.
• System control indicators.
• Industrial and consumer electronics.

Working principle

QL484-IT Discrete LED indicators are powered by constant current LED drivers. These LED drivers convert the power supply to smooth current and keep the LED brightness uniform in all operating conditions. This ensures constant visibility throughout their service life. The indication voltage of the LED drivers is an important parameter since the LED drivers can be damaged if the indication voltage is too high.

QL484-IT Discrete LED indicators can be categorized into two types based on their operation voltage: the low voltage type and the high voltage type. The low voltage type is usually powered by 5-15V DC, and the high voltage type is usually powered by 17-60V DC. In both types, the current through the LEDs is fixed at 20mA, making them both suitable for a wide range of applications.

The power supply to the discrete LEDs is provided through integrated precision components. This ensures that the voltage and current of the LEDs remain constant even when the lines of the power supply fluctuate. The constant level of current through the LEDs boosts the longevity of the device and allows them to work effectively even in extreme temperatures.

QL484-IT Discrete LED indicators are also built with a high level of robustness and protection, making them highly reliable. The LED indicators feature an IP67 protection grade and have been tested for shock resistance up to 10G. They also feature over voltage protection, over temperature protection, and short circuit protection, enhancing their stability in the most extreme conditions.

QL484-IT Discrete LED indicators are designed for high visibility, reliability, cost-effectiveness, and safety. Their compact design allows for easy installation and maintenance, making them a perfect choice for both industrial and consumer applications.

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