1. Introduction and Overview
The BFT P111528 Thea A.15 O.PF photocells are safety devices designed for use with automatic gate systems. These photocells create an infrared beam across the gate opening. If this beam is interrupted by an obstruction (such as a vehicle or person) while the gate is closing, the gate control unit will receive a signal to stop or reverse the gate movement, preventing potential accidents or damage. This manual provides essential information for the correct installation, operation, and maintenance of your BFT Thea A.15 O.PF photocells.
2. Safety Information
Please read all safety instructions carefully before installation and operation. Failure to follow these instructions may result in injury or damage to property.
- Qualified Personnel: Installation and wiring must be performed by qualified technical personnel in accordance with local electrical codes and regulations.
- Power Disconnection: Always disconnect power to the gate automation system before performing any installation, maintenance, or troubleshooting.
- Intended Use: These photocells are designed for gate automation safety. Do not use them for purposes other than those specified in this manual.
- Obstruction: Ensure the area around the gate is clear of obstructions during installation and testing.
- Children and Pets: Keep children and pets away from the gate area, especially during operation.
- Regular Checks: Periodically check the functionality of the photocells as described in the Maintenance section.
3. Package Contents
Verify that all components are present and undamaged before proceeding with installation.
- 1x BFT Thea A.15 O.PF Transmitter Photocell
- 1x BFT Thea A.15 O.PF Receiver Photocell
- 2x Mounting Gaskets/Pads
- Mounting Screws and Anchors (may vary by package)
Image: The BFT Thea A.15 O.PF photocells, showing both the transmitter and receiver units along with the two included mounting gaskets/pads.
4. Setup and Installation
Proper installation is critical for the reliable operation of the photocells. Refer to your gate control unit's manual for specific wiring diagrams and connections.
4.1 Mounting Location
- Mount the photocells on rigid, stable surfaces, such as gate posts or dedicated pillars.
- Position the transmitter and receiver directly opposite each other, ensuring a clear line of sight.
- The height of the photocells should be appropriate for detecting typical obstructions (e.g., 50-60 cm from the ground, or as specified by local regulations).
- Avoid direct sunlight shining into the receiver lens, as this can interfere with operation.
4.2 Wiring
The photocells require a power supply and connection to the gate control unit's safety input. Typically, the transmitter unit only requires power, while the receiver unit requires power and signal connections to the control board.
- Route all wiring through appropriate conduits to protect against damage and environmental factors.
- Use the cable glands (e.g., PG11, visible on the bottom of the unit) to ensure a watertight seal where cables enter the photocell housing.
- Connect the power supply (usually 12-24V AC/DC) to both the transmitter and receiver units as per the wiring diagram provided with your gate control unit.
- Connect the signal output from the receiver unit to the designated safety input on your gate control board. This is typically a Normally Closed (NC) contact.
Image: Bottom view of a BFT photocell unit, highlighting the PG11 cable gland for secure cable entry and protection.
4.3 Alignment
Accurate alignment between the transmitter and receiver is crucial for proper operation.
- After mounting and wiring, power on the gate system.
- The receiver unit typically has an indicator LED that illuminates when the beam is correctly aligned.
- Adjust the position of the photocells slightly until the alignment indicator on the receiver is stable.
- Securely tighten all mounting screws once alignment is achieved.
Image: Side view of a BFT photocell, illustrating its compact design suitable for gate post mounting.
5. Operating Instructions
Once installed and aligned, the BFT Thea A.15 O.PF photocells operate automatically as a safety feature of your gate system.
- The transmitter continuously emits an infrared beam towards the receiver.
- When the beam is uninterrupted, the receiver sends a 'clear' signal to the gate control unit, allowing normal gate operation.
- If an object passes between the transmitter and receiver, interrupting the beam, the receiver immediately signals the gate control unit.
- Upon receiving an 'interrupted' signal, the gate control unit will typically stop the gate's movement or reverse its direction (if closing) to prevent impact.
- The gate will remain stopped or open until the obstruction is removed and the beam is clear again.
6. Maintenance
Regular maintenance ensures the continued reliability and safety of your photocells.
- Cleaning: Periodically clean the lenses of both the transmitter and receiver units with a soft, damp cloth to remove dirt, dust, spiderwebs, or debris that could obstruct the beam. Do not use abrasive cleaners.
- Alignment Check: Test the photocells regularly (e.g., monthly) by placing an object (like a box or your hand) in the path of the beam while the gate is closing. The gate should stop or reverse. If it does not, check alignment and wiring.
- Physical Inspection: Inspect the photocell housings and mounting for any signs of damage, loose connections, or deterioration. Repair or replace as necessary.
- Vegetation: Keep vegetation clear from the path of the infrared beam.
7. Troubleshooting
If your photocells are not functioning correctly, refer to the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Gate does not close, or reverses immediately. | Beam obstructed, misaligned photocells, dirty lenses, wiring issue. | Check for obstructions. Clean lenses. Re-align photocells. Verify wiring connections. |
| Photocell indicator LED is off or flickering. | No power, faulty unit, severe misalignment, direct sunlight interference. | Check power supply. Re-align carefully. Shield from direct sunlight if possible. If problem persists, unit may be faulty. |
| Gate closes even with an obstruction in the beam path. | Photocells not functioning, incorrect wiring to control unit, faulty control unit input. | Test photocell functionality (e.g., check LED status). Verify wiring to gate control unit. Consult gate control unit manual. |
8. Specifications
- Manufacturer: BFT
- Model Number: P111528 (Thea A.15 O.PF)
- Dimensions: Approximately 10 x 30 x 30 cm (per unit, packaging dimensions)
- Weight: Approximately 180 g (per unit)
- Color: Black / Dark Grey
- Batteries: Not included, not required
- Power Supply: Typically 12-24V AC/DC (refer to specific product labeling or BFT documentation for exact voltage range)
- Output Type: Relay output (Normally Closed - NC)
- Origin: Made in Italy
9. Warranty and Support
For warranty information, please refer to the terms and conditions provided by your point of purchase or the official BFT website. BFT products are known for their quality and are manufactured in Italy.
For technical support or further assistance, please contact your authorized BFT dealer or installer. They can provide specialized guidance and service for your gate automation system.
