CNY17-3X017

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Optoisolators - Transistor, Photovoltaic Output - have become a popular solution for electrically isolating a controller from the field signals it is reading or controlling. The CNY17-3X017 optoisolator is designed specifically for use in low power control systems, either just for signal detection or for controlling a solid-state switch or relay. This optoisolator offers electrical insulation between the input and output ensuring output protection.

Overview of CNY17-3X017 Optoisolator

The CNY17-3X017 optoisolator is a three-pin optoisolator, consisting of a Gallium Arsenide Light Emitting Diode (LED), a phototransistor, and a voltage regulating diode or a resistor that is used for current limiting. The LED acts as an optical emitter, which emits light when an electrical current is applied. The phototransistor features a photo sensitive base which is used to detect the light and trigger its electrical connection. The voltage regulating diode or current limiting resistor act as a protective device to ensure that the circuit does not overheat when more power is applied than designed.

Application Field of CNY17-3X017

The CNY17-3X017 optoisolator is primarily used for low power applications due to the lack of a power source. Its low power requirement and compact design allow it to be integrated into the circuit design eliminating the need for complex external components. This makes the CNY17-3X017 optoisolator ideal for applications such as switching between a controller and field signals, low power automation, low current signal isolation or signal protection.

Working Principle of CNY17-3X017

The working principle of the CNY17-3X017 optoisolator is based on the photovoltaic effect. This is when light is shone on a semiconductor material, such as gallium arsenide, where it is converted to electrical energy, creating a voltage (across the material). This voltage is then used to trigger a transistors electrical connection. This current then flows through an external resistor that is used to set the current level, thus creating a current that is proportional to the amount of light the LED emits. This in turn creates a voltage that is delivered from the phototransistor output and can be used to control the field signal.

Conclusion

The CNY17-3X017 optoisolator is an important component of anylow power control system. Its compact size and low power requirements makes it ideal for applications such as low power automation, signal isolation, and solid-state switching. The photovoltaic effect is used to trigger the phototransistor\'s electrical connection and the resistor used to set the current ensures that the circuit does not overheat. The CNY17-3X017 optoisolator is a cost-effective and reliable way to protect the controller from the field signals it is reading or controlling.

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