Entrapment protection devices ensure that a motorized door or grille will not close on an object. If an object enters path of closure, the entrapment protection device will stop the door or grille from closing and return it to the fully open position.
Constant Pressure to Close
Per UL 325-2010, doors without a monitored and properly functioning primary entrapment protection device will only function by constant pressure to close operation. This means that a person must physically push the close button the entire time until the door is closed.
Primary Entrapment Devices
If you want to close your door with a single push of a button, you must install one of the following entrapment devices:
- ELR Electric Sensing Edge – Requires a physical connection between the bottom bar sensing edge device and the motor operator
- Wireless Sensing/Weather Edge Seal – Requires continuous monitoring
- Photo Eyes – NEMA 4x or 1 photo eye sensors
Any contact with the edge or interruption of the sensor beams during the close cycle causes the door to immediately stop downward travel and reverse direction to the fully open position.
Optional Secondary Entrapment Protection Devices
These may be used in conjunction with a set of primary entrapment photo eyes or with constant pressure to close operation.
- Electric Sensing Edge with Wireless Edge Kit – Eliminates the need for a physical traveling electric cord connection between the bottom bar sensing edge device and the motor operator
- Sensing/Smoke Seal Edge – Is not continuously monitored, but provides automatic reversing control through an automatic sensing switch within a neoprene or rubber astragal extending the full width of the door’s bottom bar