REX is an abbreviation used in access control for devices and circuits involved in providing request to exit functionality. REX devices customarily are pushbuttons, exit bars or motion sensors. REX functions can also be implemented using upgrade kits designed for these applications, or by...
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Exit bars are electronic, mechanical, or a combination of two technologies. Electronic bars use sensors to detect pressure or someone touching them to release the locking device and signal the access control system. Mechanical bars use switches and the pressure of the person attempting to egress to actuate the bar.
Dual technology exit bars use two technologies to increase their reliability. Illuminated and luminescent models are available.
The single biggest advantage of the exit bar is that it is a universally recognizable means of unlocking a door, and a person approaching a door on foot, will intuitively push on the bar, even if he or she does not know what the word EXIT means.
The single biggest drawback to the exit bar is that it is necessary to get the required wiring from the exit device to the hinge edge of the door, then from the hinge edge of the door over to the fixed door frame. Because the door moves, whatever method used to transfer the circuits are exposed to stress, movement and possibly vandalism. Electric hinges, pocket transfers, door loops are the most commonly deployed transfer solutions with other specialty products also available to professional designers with special requirements.
REX kits are also available for many exit devices, where signals are required for interfacing with security systems, or supplemental locks are being retrofitted to existing structures to ramp up building security.
Securitron Magnalock Corp. has developed more than 25 packaged electronic access control systems for controlling from one to three doors. These packaged electronic systems include the lock(s...
Security Door Controls, Model #1511S Exit Check Delayed Egress Emlock combines features of several different models and adds code compliance at a new lower price point.
Electromagnetic locks are sometimes regarded as an “idiot-proof locking solution” for unskilled installers or for use on problem doors.