OPB877P51

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Optical Sensors - Photointerrupters - Slot Type - Transistor Output

OPB877P51 application field and working principle

The OPB877P51 is an optical sensor in the category of photointerrupters, specifically from the slot type transistor output family. This sensor is used to directly detect objects passing through a slot or gap in materials, and is commonly used in automation and robotics. It has many potential applications, such as sensing of indexing pulses for positioning servos and motors, home security systems, sensing material movement, and more.

In terms of design, the OPB877P51 is made up of a light-blocking slot mounted in the center of the optics. When a object passes through the slot, a signal is generated which is transmitted to a controller. The optics are encased in an adjustable, rugged polycarbonate housing, making it safe to use in environments where high shock or vibration is present. The optics of the OPB877P51 are also designed to be optically isolated from other components, ensuring accurate and reliable operation without interference from external objects or signals.

The working principle of the OPB877P51 is simple. When an object enters the slot, it interrupts the optical circuit. This causes the infra-red LED on the PCB to switch off and the NPN transistor on the receiver to switch on. The signal produced by the transistor is then transmitted to the controller, thereby allowing it to detect objects passing through the slot. The outputs of the OPB877P51 can be configured to either NPN or PNP transistor outputs, increased sensitivity, reduced emission, or adjustable trigger levels, allowing the user to customize the performance of their device. Additionally, the OPB877P51 has a dynamic switching frequency of up to 600 kHz, ensuring accurate and reliable operation.

The OPB877P51 is a reliable and easy to use photointerrupter that can be used in a variety of applications. It is small in size and has a low power consumption, making it an ideal choice for applications where space and power efficiency are essential. The flexibility of its outputs and adjustable trigger levels provide the user with a great deal of customizability, and it’s rugged polycarbonate housing ensures reliable operation even in harsh environments. Overall, the OPB877P51 is an ideal choice for those looking for an optical sensor with the performance and flexibility they need.

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