Description
Break glass units-Access Control What Is a Break Glass Unit?
A Break Glass Unit is a small device used in access control systems. This unlocks the door, allowing people to exit.
You will find it in offices, hospitals, schools, malls, and other buildings. Break glass units-Access Control is an important part of any safety and security system.
Break glass units-Access Control Why You Need One
In an emergency, every second matters. People must be able to exit quickly. A Break Glass Unit makes this possible. It allows doors to open when the main system fails or during a power outage.
Also, it works without power. This means it will function even if the main system goes down.
Break glass units-Access Control Key Features
Here are the main features:
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Easy to use in an emergency
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Unlocks doors by cutting power
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Works with access control systems
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Tamper-resistant design
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Can be reset or replaced after use
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Clear labeling for quick use
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Some models include LED indicators
Most units come in a bright green or red color. This helps people spot them fast during a crisis.
How It Works
The unit is wired into the access control system. Normally, it does nothing. But if the glass is broken, it interrupts the power to the door lock. This releases the door.
The idea is simple but effective. Anyone can use it—just break the glass and go.
Break glass units-Access Control Installation
Installing the unit is quick and easy. It is usually mounted on the wall next to the door. Most models come with all needed screws and parts.
Also, it fits standard back boxes, so you won’t need custom fittings. Just follow the included wiring diagram.
Resettable or Non-Resettable?
There are two main types of Break Glass Units:
Non-Resettable Units
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Use real glass
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Must replace the glass after use
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Traditional and low-cost
Resettable Units
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Use a plastic plate instead of glass
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Can be reset with a tool or key
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No need to replace parts
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Better for training and testing
Both types work the same way. The difference is what happens after use.
When to Use It
Break Glass Units are used in many places:
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Offices – near secure doors
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Hospitals – in patient areas and emergency exits
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Stores – at exits and staff-only areas
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Schools – in hallways and classrooms
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Factories – along evacuation paths
In short, any place with access control needs one. It’s about keeping people safe.
What Happens After Use?
After someone breaks the glass, the door opens. Then, you need to reset or replace the unit.
For non-resettable models, replace the broken glass. For resettable models, use the reset key or tool to return it to normal.
Many resettable units also have a small display. This shows that the unit has been triggered and needs attention.
Works With Other Systems
Break Glass Units can work with:
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Firstly, Electric locks
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Secondly, Magnetic locks
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Thirdly, Fire alarms
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Lastly, Backup power systems
This makes them useful in combined safety systems. For example, a fire alarm can cut power to locks and allow doors to open. The Break Glass Unit adds a manual override in case of failure.
Benefits at a Glance
Let’s recap what makes this unit important:
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Firstly, Allows quick exit in emergencies
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Secondly, Easy to see and use
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Thirdly, Simple to install
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Fourthly, Works without power
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Also, Helps meet safety codes
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Fifthly, Works with many systems
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Lastly, Low-cost safety tool
Final Thoughts
To sum up, a break glass unit is a small device with a big role. It keeps people safe when systems fail. It provides a simple, manual way to unlock doors in an emergency.
Whether you choose a resettable or non-resettable model, adding this unit is a smart move. It also helps protect lives, meet building rules, and prepare for the unexpected.
Make sure it’s part of your access control or fire safety system. It’s a small investment for peace of mind.


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