50739090975600F Optoelectronics

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• Panel Indicators

50739090975600F is an LED panel indicator used for various signal identification, alarm, and status indications, and it is one of the most commonly used indicating instruments in control systems. It is particularly suitable for voltage and current monitoring, high temperature alarming, mains power recording, as well as undervoltage and overvoltage alarms etc.

50739090975600F panel indicator features white light emission, robust bending ability, and low power consumption compared to traditional bulbs. Besides, it has long lifespan and excellent environmental-resistance, and these traits make it ideal for outdoor and plant usage. The panel indicator is also highly configurable with various connection options such as PCBs, DIN rail, terminal blocks, and link cables.

A typical application of 50739090975600F panel indicator would be in industrial control applications, when operators require e.g. a voltage level alarm or overcurrent alarm. To achieve that, the panel indicator’s switchpoints can be set such that it lights up when an alarm limit is reached. The indicator can also be pre-configured to show safe or warning conditions in the form of green, yellow and red lights.

• Working Principle

The working principle of 50739090975600F panel indicator is based on a basic semiconductor principle. When a current is passed through the cable connection, electrons flow through the LED (Light Emitting Diode) and the photons are released. This results in the light emitted by the LED illuminating and providing a visual indication.

Electrical current is necessary to create the light. To get the LED to turn on and off at particular switch points, the operator can use a small voltage applied through the control input terminals, and a power supply. The voltages should be around 4-10VDC, and once the correct voltage is used, the switchpoints can be set using the adjustable terminal. This is normally done using a simple voltage divider configuration to set up different operating thresholds.

Finally, when the measured incoming voltage reaches the specified switch point, the PNP (Positive Negative Positive) transistors will allow current to flow and drive the LED, hence turning it on. This simple process is repeated over and over to provide a reliable indication of the alarm signal.

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