How to connect a rectangular fiber optic sensor

To connect a rectangular fiber optic sensor, you need to properly mount the sensor, align the fiber, and wire the power and signal lines according to the manufacturer's specifications.Physical Installation

1. Mount the Sensor: Rectangular fiber optic sensors can often be mounted directly on a DIN rail or using a separate bracket for stand-alone applications . Ensure the sensor is securely fixed to prevent movement that could affect detection accuracy.
2. Prepare the Fiber: If using a free-cut fiber type, trim any excess fiber using a proper fiber cutter to ensure a clean end face, which is critical for accurate light transmission . Always insert the fiber from the side marked with writing to maintain correct orientation.
3. Align the Optical Axis: Proper alignment of the transmitter and receiver is essential. The fiber should be positioned so that the light path is unobstructed and the sensor can detect the target object reliably .

Electrical Connection

1. Power Supply: Connect the brown wire to a 24V DC power supply and the blue wire to 0V (ground), . Ensure the power source matches the sensor's voltage requirements.
2. Signal Output: Connect the black wire to the relay or input device that will receive the sensor's output signal . Configure the sensor for DARK-ON or LIGHT-ON operation depending on your application.
3. LED Indicators: Use the sensor's LED indicators to verify proper operation. The red LED typically indicates light detection, while the green LED shows stability of the sensing signal .

Calibration and Setup

1. Set Detection Range: Place the target object at the farthest detection point and press the SET key. Move the object to the closest point and press SET again to allow the sensor to calculate the trigger light intensity .
2. Adjust Sensitivity: Use the △ and ▽ buttons to fine-tune the detection threshold. For precise detection in short distances, use FINE mode; for longer distances or harsh environments, use TURBO or SUPER modes .
3. Protect the Fiber: Apply strain relief and protective coatings if the fiber is exposed to harsh environments. Adhesives like M-Bond 200 or AE-10, or RTV silicone, can protect the fiber and maintain accurate measurements .

Optional Installation Methods

• Adhesive Mounting: For permanent installations, bond the fiber to the surface using suitable adhesives after cleaning and conditioning the substrate .
• Tape Mounting: For temporary setups, double-sided tape can hold the fiber in place, though it is less reliable under temperature or humidity changes .
• Embedment: In concrete or structural applications, fibers can be embedded in grooves or cast into the material for long-term monitoring . Following these steps ensures that your rectangular fiber optic sensor is properly connected, aligned, and calibrated for accurate and reliable operation in industrial or automation systems.