OPB890N55

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Optical Sensors - Photointerrupters - Slot Type - Transistor Output

The OPB890N55 photointerrupter is a slot type optical sensor, with a transistor output. It is designed to detect passing objects or signals from various sources, such as rotary encoders, animals, or humans. It is popular in mechanical and electronic applications for sensing movement, and is often found in robotic systems.

Features

• Small and compact design
• Easy connections
• High power supply voltage
• Supports up to 50 kHz
• Fast switching between 0.5µs-3ms
• High intensity

Applications

The OPB890N55 photointerrupter is well-suited for industrial automation, mechanical engineering, and high-speed measurement systems. It can be used in many applications, including safety devices, door interlock systems, tape reading systems, counter displays, power systems, and robotic parts counting and sorting.

Working Principle

The OPB890N55 photointerrupter operates with an interruptive principle; the infrared light emitting diode (LED) is used to send out a light beam, which is then received by a photodiode. When the light beam is broken or interrupted, the open collector output of the photointerrupter turns on, signaling a short circuit. When the beam is restored, the output turns off. This basically means that any kind of interruption (e.g. movement) is detected, and the signal can be used to trigger different actions.

How it Works

The OPB890N55 photointerrupter consists of an emitter side and a receiver side, which are connected together to form a metal plate. The metal plate has a gap in the middle, called the “slot”. This slot is used to detect objects passing through it. The emitter side is composed of an infrared LED, while the receiver side has a photosensor.

So when an object passes in front of the slot, it causes the light beam to be interrupted momentarily. This interruption is detected by the photosensor, which triggers the transistor output to turn on. When the object moves out of the slot, the light beam is restored and the transistor output turns off. Thus, the interruption or blockage of the light beam by the object is used to detect its presence.

Conclusion

The OPB890N55 Photointerrupter is a reliable, high-performance slot type optical sensor, with a transistor output. It is ideal for industrial applications, such as safety devices, door interlock systems, and robotic parts counting and sorting. The small size, simple connections, high power supply voltage, and fast switching make it the perfect choice for any profession.

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