OPB493N11

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Optical sensors play a major role in modern automation, providing reliable, non-contact sensing of the physical world. The OPB493N11 photointerrupter is a slot-type photointerrupter with logic output. It is a reliable, cost-effective device which offers high performance and surge protection.

The device is designed for the monitoring of objects such as switches, wheels, gears, and other mechanical parts. It consists of an infrared LED light source and an integrated receiver. The infrared LED emits a beam of light which is detected by the integrated receiver. When an object passes within the narrow slot between the LED and the receiver, the beam is interrupted and the change in the light level is detected by the receiver.

The detector portion of the device includes two main components: an infrared receiver and a Schmitt trigger comparator. The infrared receiver senses the incident infrared light from the LED and provides an analog output voltage. The analog signal is then input to the comparator which compares it to the preset threshold voltage and generates a logic output. The logic output is either logic low or logic high and it is used to drive an external logic device.

The OPB493N11 is designed for use in a variety of applications such as switch, wheel, and gear position monitoring. It is also useful for detecting the passage of objects across a line, for presence/absence detection, for edge detection, and for providing reliable over-travel protection. It is well suited for use in safety critical systems and is RoHS compliant.

The OPB493N11 is highly reliable, with a rugged construction and a wide operating temperature range. It is also immune to electrical interference and is provided with surge protection circuitry for the input and output. The optical sensitivity can be adjusted according to the application requirements by adjusting the bias current of the LED. This makes the device suitable for use in a wide variety of applications.

In summary, the OPB493N11 is an excellent solution for switch, wheel and gear position monitoring, edge detection, and over-travel protection. It is easy to install and configure, and provides reliable sensing in a wide range of conditions. It is also RoHS compliant, making it an ideal choice for safety-critical applications.

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