Installing Entrapment Protection Devices for the UniFi Access Gate Hub

The Gate Hub (UA-Hub-Gate) supports integration with third-party entrapment protection devices (reversing safety sensors) to enhance gate safety. These sensors detect objects or people in the gate's path, automatically stopping or reversing its motion to prevent injuries and property damage. This article guides you through installing entrapment protection devices to ensure compliance with regulations and ensure safety when operating motorized gates. If you're looking to understand the Gate Hub, click here. To wire the Gate Hub to a gate and pedestrian side door, click here.  

UL 325 Standard for Safety

The UL 325 standard establishes safety requirements for entrapment protection devices used in automated door and gate systems. UL 325 categorizes entrapment protection devices based on gate classification and movement, ensuring compliance with safety standards:

• Inherent Entrapment Protection System: Automatically stops and reverses the gate within 2 seconds upon detecting an obstruction.
• Non-Contact Photoelectric Sensor: Uses infrared beams to detect objects and either stops or reverses the gate within 2 seconds.
• Contact Sensor (Edge Device): Stops and reverses the gate within 2 seconds when physical contact is detected.
• Adjustable Clutch or Pressure Relief Device: Limits the gate's stopping force to 40 lbf, ensuring it halts safely without excessive force.
• Continuous Pressure Actuating Device: Requires constant pressure to open or close the gate; movement stops when pressure is released.
• Audio Alarm: Provides an audible warning to alert users of potential hazards.

If a motorized gate lacks a primary entrapment protection device, someone must physically hold the close button until the door closes entirely.

Learn more about UL 325 External Entrapment Protection Devices and UL 325 Gate Operators.

Entrapment Protection Device Requirements for License Plate Unlock

To ensure the License Plate Unlock feature functions properly in the UniFi Access system, the UL 325 terminals on the third-party gate operator control board must be correctly connected to entrapment protection devices. Without proper installation, License Plate Unlock will not work, and gates will not open—even if a vehicle's license plate is detected and authorized for access.

Below are examples of entrapment protection device installations for different gate-closing actions.