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Light curtains are an important safety measure featured in some security rolling doors. While the addition of one can enhance safety in any application, the level of safety one provides truly depends on the type of light curtain used.
At CornellCookson, we now have a light curtain that is UL325 approved: SafetyGard UL325. Before jumping right into the product itself, let’s review a few key points about UL325 and safety devices.
What’s in a name? In the case of SafetyGard, including “UL325” in the name was important to us. It lets customers know exactly which set of standards for commercial doors this safety feature meets. So, let’s have a refresher on the UL325 standards.
The UL 325 standard applies to electrical and pneumatic door and gate systems, and door, drapery, gate, louver, window and turnstile operators, together with controls and accessories for use with such operators. It was put in place to prevent entrapment accidents and reduce their risk. The gate operators this standard encompasses are separated into four categories by UL, covering a range of residential, commercial, industrial and guarded industrial applications.
UL 325 also outlines safety improvements for automatically operated gates, including:
Non-contact safety devices do just what the name implies – they don’t need to have contact with any external item to carry out their mechanisms. These devices typically “sense” if a person or item is in the downward path of travel as a commercial door cycles to the closed position with beams of light. If the light beam is broken, the door stops and may even reverse to return to a completely open position, depending on the settings.
In busy facilities, a light curtain may be more ideal than a set of photo eyes because of its extended functionality. Light curtains are larger and generally cover a larger area than photo eyes, making them ideal in hectic, energetic environments.
Now that we have a stronger understanding of UL325 and non-contact safety devices, let’s dive in.
SafetyGard UL325 is the newest addition to our product option portfolio. A non-contact primary entrapment protection device, SafetyGard UL325 provides 3 or 6 feet of protection depending on your door size. This also means it can provide more protection than photo eyes, which can be limited based on different opening heights. It can be used on service doors, insulated doors, counter doors, and grilles, and can even be retrofit to an existing closure.
Working from its transmitter and receiver, the light curtain senses if the beam is interrupted, immediately stops the door’s downward travel, and reverses direction to the fully opened position— minimizing contact to an obstruction in the opening and damage to equipment, goods, and even the door itself.
Featuring a sleek profile, SafetyGard UL325 provides an almost seamless look that eliminates the visibility of the sensing edge in the opening and comes with an extruded mounting channel that easily attaches to the guide design, a win for designers and facility managers alike. It also has dynamic sequential blanking to eliminate the light curtain being triggered by door deflection due to wind.
When you want to look after the safety of people and equipment and prevent accidental door closures, the SafetyGard UL325 Light Curtain with Dynamic Sequential Blanking is a smart choice.