What is a Request to Exit (REX) Device?
In modern access control and security systems, managing how people enter and exit a secured area is just as important as controlling who gets in. While much attention is given to card readers, biometric scanners, and keypads at entry points, exit solutions play a critical role in safety, compliance, and convenience. One of the most widely used exit solutions is the Request to Exit device, commonly known as a REX device. It ensures that doors can be opened safely from the inside without compromising the overall security of the building.
Meaning
A Request to Exit (REX) device is a component of an access control system that allows authorized occupants to exit a secured area without triggering alarms or violating access rules. Unlike entry devices that verify credentials, a REX device signals the access control system to unlock the door temporarily when someone wants to leave.
REX devices are typically installed on the secure side of a door and are designed to provide a safe and convenient exit path. They are especially common in offices, commercial buildings, hospitals, data centers, and industrial facilities where doors remain locked from the outside but must allow free egress from the inside.
How REX Device Works
A REX device works by sending a signal to the access control panel when it detects an exit request. Once activated, the system unlocks the door for a predefined period, allowing the person to exit without using credentials.
The activation method depends on the type of REX device. Some require physical interaction, such as pressing a button, while others rely on motion detection. When triggered, the REX device communicates with the door controller, which then disables the locking mechanism and, if configured, suppresses door-forced or door-held-open alarms.
After the exit delay expires, the door automatically relocks, restoring the original security state. This process ensures smooth exit flow while maintaining full control over entry points.
Key Features
REX devices include a range of features designed to balance security, safety, and ease of use.
- Integration with access control systems to manage door locks and alarms.
- Configurable unlock timers to control how long a door remains open.
- Compatibility with electric strikes, magnetic locks, and other locking hardware.
- Fail-safe operation to ensure doors unlock during power failures when required.
- Visual or audible indicators to confirm activation.
- Support for emergency egress requirements and building safety codes.
Benefits
Using a Request to Exit device provides several practical and regulatory advantages for organizations.
One of the main benefits is improved safety. REX devices allow occupants to leave a secured area quickly in normal situations and emergencies, reducing the risk of entrapment. This is particularly important in environments with strict fire and life safety regulations.
Another key benefit is better security management. By routing exit requests through the access control system, REX devices prevent false alarms and unauthorized door openings. They ensure that exits are logged and monitored just like entries, offering better visibility into building activity.
REX devices also enhance convenience. Employees and visitors can exit freely without badges or codes, reducing friction and improving overall user experience while keeping entry points protected.
Types of REX Devices
There are several types of Request to Exit devices, each suited to different environments and security needs.
Push Button REX
Push button REX devices require users to press a clearly marked button to unlock the door. They are simple, reliable, and commonly used in offices and commercial buildings. These devices are easy to understand and offer controlled exit activation.
Motion Sensor REX
Motion-based REX devices use infrared or microwave sensors to detect movement near the door. When motion is detected, the door unlocks automatically. This type is popular in high-traffic areas where hands-free operation is preferred.
Touchless REX
Touchless REX devices are designed to activate without physical contact, often using proximity or wave sensors. They are ideal for healthcare environments and locations where hygiene is a priority.
Combined REX and Emergency Devices
Some REX units are integrated with emergency release functions. These devices combine standard exit requests with emergency overrides, allowing doors to unlock immediately during critical situations.
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