Secondary Entrapment Protection Sensors
Rev: A
S-5
Secondary Entrapment Protection Sensors
Kinetic is equipped with a primary, Type A, inherent entrapment sensor (IES). UL 325 Safety Standard
compliance requires installation of secondary entrapment protection sensors, the number of which, depends
on the entrapment hazards that exist at each particular installation.
To comply with UL 325, the following external sensors may be used:
• Contact Sensors, such as edge sensors.
• Non-contact sensors, such as photoelectric eyes.
The site designer or installer can choose either photoelectric eyes or edge sensors or use these devices in
combination. Whatever devices are used, protection in both the opening and closing directions of gate travel
must be provided.
The UL 325 Safety Standard for automatic sliding gates specifically requires that edge sensors or photoelectric
eyes or a combination of both devices be installed to protect against pedestrian entrapment in BOTH
directions of the gate travel and where an entrapment hazard exists.
Photoelectric Eyes:
One or more photoelectric eyes shall be located where the risk of entrapment or
obstruction exists, such as the perimeter reachable by a moving gate.
A photoelectric eye or contact sensor is also required to protect against possible entrapment if
the gate opens to a position less than 16 inches from any object, such as a post or wall.
Edge Sensors:
One or more edge sensors shall be located on the leading and trailing edges of a slide gate
where the risk of entrapment or obstruction exists. One or more contact sensors (edge sensors) shall be
located at the leading edge, trailing edge, and post-mounted, both inside and outside of a sliding gate.
Sensor Security:
A hard-wired sensor shall be located and its wiring arranged so that communication
between the sensor and gate is not subjected to mechanical damage.
Sensor Function & Communication:
A sensor that transmits its signal to the gate operator
must be located so its signal is not impeded by building structures or other obstructions. All sensors must be
installed so that they function as intended for the end-use conditions.
UL 325 Listing:
The edge sensors and photo electric eyes must be tested and labeled as “Recognized
Components” under UL 325 in order to be deemed acceptable for use in a gate operator. Study the
Important
Safety Instructions
and consider your specific installation to determine where the greatest entrapment risks exist.
Locate edge sensors and/or photoelectric sensors accordingly. Be certain that a sufficient number of sensors
are used so that pedestrians are protected from entrapment in both directions of the gate travel and all hazard
areas are fully protected. Refer to the UL website at www.ul.com for the most up-to-date list of gate operator
safety standards (UL 325). Refer to www.astm.org for a complete list of ASTM F2200 Gate and Fence
Standards.
