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6. SPDT output with both normally open and normally closed dry contact outputs.
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Photoelectric sensors are one of the most essential components in the industrial electrical category. It is because of their ability to detect the presence, absence, or distance of an object that makes them an indispensable tool in automation systems. These sensors use light to detect the target object and generate a signal that aids in controlling the machine's movements. However, due to the variety of photoelectric sensors on the market, selecting the right one can be a daunting task. In this article, we discuss valuable tips that one should consider when choosing photoelectric sensors in the industrial electrical category.
Types of Photoelectric Sensors
Before we delve into the tips that one should consider when choosing photoelectric sensors, it is essential to understand the various types of sensors available in the market. There are three main types of photoelectric sensors;1) Through-beam Sensor
Through-beam sensors consist of two units; an emitter and a receiver that are installed facing each other. The emitter produces a beam of light that the receiver detects. If an object interrupts the beam, it causes the receiver to turn off the signal that, in turn, activates the automation system.2) Reflective Sensor
The reflective sensors consist of only one unit that acts as both the emitter and receiver. The sensing object reflects the light emitted by the sensor back to the receiver, whose signal is triggered if the object is detected.3) Diffuse Sensor
Diffuse sensors emit a beam of light that is reflected by an object and returns to the emitter. The sensor detects the light and sends a signal that, in turn, activates the automation system. Diffuse sensors are highly versatile and can detect a variety of objects, even those with varying colours and textures.Factors to Consider When Choosing Photoelectric Sensors in the Industrial Electrical Category
1) Sensing distance
One of the critical factors to consider when selecting photoelectric sensors in the industrial electrical category is the sensing distance. Before purchasing a sensor, it is essential to know the distance at which it can detect an object accurately. Sensors with a long-distance sensing range are ideal for large automation systems while shorter sensing ranges are suitable for smaller systems.2) Environmental Conditions
The environmental conditions in which the sensors are placed play a vital role in their performance. Some photoelectric sensors are designed to function in harsh environments and can withstand extreme temperatures, dust, dirt, and humidity. Therefore, consider the ambient temperature, humidity, dust, dirt, and moisture levels in the workspace when selecting photoelectric sensors.3) Type of Object Being Detected
The type of object detected by photoelectric sensors plays a crucial role in the type of sensor to be selected. Objects with shiny, glossy or mirrored surfaces might reflect the light thrown by the emitter. Therefore, reflective sensors are not suitable for such objects. Diffuse sensors, on the other hand, can detect objects with shiny or mirrored surfaces, but their effectiveness reduces when detecting dark or black objects.4) Sensing Time
The time it takes for a photoelectric sensor to detect an object and relay the signal to the automation system is also a critical factor to consider. In many industrial applications, the sensing speed and response time is crucial. Therefore, select sensors that have faster response times and higher sensing speeds.5) Output Type
Another factor to consider when choosing photoelectric sensors is the type of output produced by the sensor. Photoelectric sensors can produce different types of output, such as digital, analog, or voltage signals. Therefore, ensure that you select sensor types whose output is compatible with the automation system.6) Wiring and Connectivity
When selecting photoelectric sensors, it is essential to consider their wiring and connectivity. Some sensors have built-in connectors, which makes installation quick and straightforward. Others, however, require complex wiring and connectors to be adequately integrated into the automation system. Therefore, select sensors whose wiring and connectivity match the automation system's specifications.Conclusion
Overall, selecting the right photoelectric sensors in the industrial electrical category can significantly impact automation systems' performance. When choosing sensors, it is essential to consider the sensing distance, environmental conditions, object being detected, sensing time, output type, and wiring and connectivity. By carefully considering these essential factors, you can significantly improve the accuracy, efficiency, and overall performance of your automation system.Related Topics You Might Like
