OPB960N51

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Optical Sensors - Photointerrupters - Slot Type - Logic Output

The OPB960N51 is an optically activated switch used to detect the presence of an object inside a given space. This device falls under the category of Optical Sensors, Photointerrupters, Slot Type, and Logic Output. It is a multipurpose device that can be used in a wide range of applications including robotics, sensing objects, security systems, and much more.

This device features a logic output that is activated when an obstruction is detected within its sensing area. The Type N51 version of the device is equipped with two sets of receiving light and blocking light bars that are placed at an angle relative to each other. This set-up allows for improved accuracy in detection and greater coverage. The detection range of the device is from 0.98 inch to 2.36 inch. The operating voltage range of the unit is between 4.5VDC to 20VDC.

The OPB960N51 is composed of a light-emitting diode (LED) and a four-pin phototransistor. The LED is responsible for emitting infrared light and the phototransistor receives the light emitted. This set-up allows the device to measure changes in light, or “light interruptions,” that occur when an object passes through the sensing area. The four pins connecting the phototransistor to the power source correspond to the following functions: VCC, GND, OUT and IN. VCC supplies power to the device, OUT is the output signal from the device, and IN is used to control the output.

The primary application of the device is for detection of an object’s presence in a given area. An ideal example is in a robotic device, when the OPB960N51 can be used to detect obstacles along the path of the robot’s movement. In this context, the device would be connected in-line with the robot’s motor power supply, enabling the robot to stop or turn when an obstacle is in its way. The device could also be used in security systems where the presence of an object activates an alarm/response device. Other applications could include complex sensing where more than one light barrier is necessary.

The working principle of the OPB960N51 is simple yet highly effective. When an object interrupt the beam, the device switches off the phototransistor, reducing the voltage across the control pin and triggers an output. When the interruption is cleared, the device switches the output back to its original state. The amount of time it takes for the output to switch states is known as the Response Time, and this will differ depending on the type of unit used.

The OPB960N51 is an incredibly versatile and powerful device, offering multi-functionality in a small package. It is a reliable and cost-effective solution for applications that require detection of an obstructions presence within a very pinpointed sensing area or room.

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