Photocell set BFt Compacta A20-180 transmitter and receiver

BFt Compacta A20-180 transmitter and receiver is a pair of infrared photocells designed for presence detection and safety on automatic gates and doors. The set creates a coded infrared beam between the transmitter and receiver to detect obstacles and prevent gate or door movement when an object or person interrupts the beam. The Compacta A20-180 is intended for integration with residential and commercial automated access systems where reliable obstacle detection and compact mounting are required.

Advantages

The Compacta A20-180 offers compact dimensions and a straightforward transmitter–receiver arrangement that simplifies alignment and installation. Coded infrared transmission reduces false triggers from ambient light and nearby systems, while the beam-based sensing provides fast response for immediate safety interventions. The design supports outdoor and indoor mounting on gates, garage doors, and automatic pedestrian doors, ensuring consistent operation in typical installation environments.

Suitable for

• Safety and presence detection on sliding and swing gates
• Obstacle detection for garage and industrial doors
• Integration with residential and light commercial access control systems
• Perimeter protection where a reliable beam sensor is required

Key specifications

• Type: Infrared transmitter and receiver photocell pair
• Sensing principle: Coded infrared beam interruption
• Installation: Surface mounting on posts, frames, or door surrounds
• Environmental use: Designed for indoor and outdoor access control applications
• Response: Immediate beam interruption detection for safety interlock functions

How to use

Mount the transmitter and receiver facing each other at the same height on suitable supports such as gate posts or door frames, keeping the optical axis unobstructed. Connect each unit to the automation control unit following the system wiring diagram and observe correct polarity and supply voltage requirements of the host control device. Align the optical heads during commissioning so the receiver reliably detects the transmitter beam; verify operation by passing an object through the beam and confirming the control system stops or holds gate/door movement as required by the automation logic.

Usage recommendations

Place the photocells at a height and location that prevents accidental blockage by vegetation or debris, and avoid aiming the units toward strong direct light sources. Periodically clean the optical windows with a soft, dry cloth and check alignment after any mechanical impact or seasonal settling of mounting supports. Test the safety function regularly according to local regulations and the automation system manual to ensure continued reliable operation.