1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your FD-ABO-90 Infrared Motion Sensor. Please read this manual thoroughly before installation and use to ensure proper function and safety.
Video: Product unboxing and internal component overview.

Image: FD Infrared Sensor in retail packaging.
2. Specifications
| Model | FD-ABO-90 |
| Technology | Infrared |
| Receiver Range | ≤15m (Range can be reduced by 30% in adverse weather conditions) |
| Infrared Frequency | 1.92 KHz |
| Power Supply | 12V to 24V DC/AC |
| Wave Length | 940nm |
| Input Current | RX 15mA, TX 30mA |
| Operating Temperature | -20°C to 70°C |
| Relay Output | 1A max 36V |
| Dimensions | 100mm x 40mm x 35mm |
| Certification | CE |
| Item Type | Motion Sensor |
| Applicable Use | Garage Door Infrared Sensor, Sliding Gate IR Barrier |
| Smart Home Platform | None |
3. Setup and Installation
Proper installation is crucial for the optimal performance of your infrared sensor. Follow these steps carefully.
3.1. General Installation Notes
- The ideal installation height is approximately 20 cm from the ground.
- The minimum installation distance between the emitter and receiver should be no less than 2 meters.
- Ensure the emitter and receiver are installed perpendicular to the protected area and are at the same horizontal level.
- Install the receiver unit first, then the emitter unit.
- Adjust the alignment until the "OFF" light on the receiver is extinguished, indicating proper beam alignment.
3.2. Wiring the Sensor
Refer to the diagram below for correct wiring connections. Ensure power is disconnected before wiring.

Image: Wiring diagram and mounting instructions for FD Infrared Sensor.
Receiver (R) Connections:
- Power Input (12-24V): Connect your 12V or 24V DC/AC power supply.
- COM: Common terminal for relay output.
- OUT (Relay):
- NC: Normally Closed contact.
- NO: Normally Open contact.
- Choose NC or NO based on your application's requirements.
Emitter (T) Connections:
- Power Supply (12-24V AC/DC): Connect your 12V or 24V AC/DC power supply.

Image: Internal view of FD Infrared Sensor showing circuit boards and terminals.
3.3. Mounting the Sensor
Follow these steps for physical installation (refer to the "Wiring diagram and mounting instructions" image above for visual guidance):
- Unpack: Open the package and take out all accessories.
- Positioning: Stick the provided holder location map (if available) or mark the desired mounting spots.
- Drill Holes: Drill holes at the marked spots and insert expansion pipes/plugs.
- Connect Wires: Before final mounting, connect the necessary wires to both the emitter and receiver units as per the wiring diagram.
- Secure Base: Fix the sensor bases using screws (typically screws 1, 2, 3).
- Adjust Angle: Adjust the appropriate angle of the PCBA (Printed Circuit Board Assembly) if needed (up to ±90°) and then fix it with screws (typically screws 4, 5).
- Final Assembly: Once wiring and alignment are complete, secure the covers onto both the transmitter and receiver units.
4. Operating Instructions
The FD-ABO-90 Infrared Motion Sensor operates by creating an invisible infrared beam between the emitter and receiver units. When this beam is interrupted by an object or person, the receiver's relay output changes its state (from NC to NO or vice-versa, depending on configuration).
- Normal Operation: When the beam is clear, the relay output will be in its default state (e.g., NC is closed, NO is open).
- Beam Interruption: When an object breaks the infrared beam, the relay output will switch to its alternate state (e.g., NC opens, NO closes). This change in state can be used to trigger alarms, open/close gates, or activate other connected devices.
- Alignment Indicator: The receiver unit typically has an indicator light. When the beam is properly aligned and clear, this light will be off. If the light is on, it indicates a misalignment or an obstruction in the beam path.
5. Maintenance
To ensure the longevity and reliable operation of your infrared sensor, perform the following maintenance tasks:
- Clean Lenses: Periodically clean the lenses of both the emitter and receiver units with a soft, dry cloth to remove dust, dirt, or debris that may obstruct the infrared beam.
- Check Connections: Annually inspect all wiring connections to ensure they are secure and free from corrosion.
- Verify Alignment: Occasionally check the alignment of the emitter and receiver. If the indicator light on the receiver is on when the path is clear, realign the units.
- Environmental Factors: Be aware that heavy rain, dense fog, or snow can temporarily reduce the sensor's effective range.
6. Troubleshooting
If you encounter issues with your FD-ABO-90 sensor, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Sensor not reacting / No detection when object passes. |
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| Sensor is overly sensitive or triggers without clear obstruction (false alarms). |
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| No power to sensor. |
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7. User Tips
- Power Supply: Always ensure you are using the correct power supply (12V or 24V AC/DC) as specified in the manual for optimal performance and to prevent damage.
- Alignment Patience: Take your time during the alignment process. A precise alignment ensures reliable operation and minimizes false triggers.
8. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your original seller or distributor. Keep your proof of purchase for warranty claims.
A detailed user manual in PDF format may also be available for download from the seller's website or directly via this link: FD-ABO-90 User Manual (PDF).