6N137#320

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Optoisolators, also known as photocouplers, are an electronic isolation device that uses light as a medium to transfer signals between two sides. 6N137#320 is a type of optoisolator which is designed to interface to TTL, CMOS, PMOS, and NMOS logic families; it is an optoisolator with logic output. This article will discuss in detail the application fields and working principles of 6N137#320 to illustrate how it functions.

Application fields

Due to its logic output, 6N137#320 is successfully used in a wide range of industrial applications. It is commonly used to isolate sensitive hardware, such as computer components, from high-power applications. For example, industrial robots, remote control systems, high voltage circuits, and servo mechanisms may all use 6N137#320 to isolate the logic circuits from potentially dangerous power levels. 6N137#320 is also used to create safe systems which reduce the chance of incorrect operation due to other environmental electrical noise sources. In addition, when used together with detectors such as photocells, encoders, and Hall effect sensors, 6N137#320 is often used to provide logic outputs for feedback of an industrial process.

Working Principle

6N137#320 is based on a universal 4N25 Coupler design which consists of an infrared LED (light emitting diode) on one side and a photodiode detector on the other side. As shown in Figure 1, the logic input is connected to an LED and the output is connected to the detector.

Figure 1. 6N137#320 Logic Output

When a signal of sufficient low-level current is applied to the LED, it will emit light. The light is detected by the photodiode detector on the other side, which will then convert it to an electrical signal. The output signal will then be amplified and further converted into a logic output. This process allows for the logic signal to be passed through the circuit without the need to break other electrical isolation barriers.

In order to ensure full isolation between the input and output, 6N137#320 includes a secondary optical shielding mechanism. This is done by inserting a small light detector between the LED and the emitter. Any light interfering with the output will be detected by the light detector, thus triggering the circuit to shut down. This prevents any external interference from affecting the system.

6N137#320 also has a built-in surge protection mechanism which prevents malicious signals from entering the opt isolation circuit. This helps reduce the possibility of false triggers caused by external currents.

Conclusion

6N137#320 is a universal optoisolator suitable for high voltage and power applications. It provides a reliable way of protecting sensitive electronics from electrical noise from other external sources. Its secondary optical shielding mechanism and surge protection make it an ideal choice for industrial applications. This article has discussed the various application fields and working principle of 6N137#320, illustrating how it can be used to create safe and reliable logic outputs.

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