Schlage Electronics 742 Emerge...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$679.00
$455.00
Schlage Electronics 742 Emergency Break Glass Assembly with Sonalert Horn

Schlage Electronics 742 Emergency Break Glass Assembly with Sonalert Horn

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Model: 742

In Stock (leaves warehouse same day if ordered before 3pm ET)

$679.00
$455.00
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Schlage 740 Series emergency break glass releases are designed for use as emergency releases of non-designated egress doors such as in individual and partitioned laboratories, secluded testing areas or other isolated work rooms that are purposely provided with exit doors. In perimeter protection systems that involve the central control of electric locking devices, an on-site emergency release may be required. The "break glassî concept may be preferred over the pull station, because it is less vulnerable to misuse or tamper actuation.

Manufacturer Resources

Product Specs

Product Group:
Electronic Access Controls
Product Subgroup:
Sensors, Switches, Relays and Timers
Product Type:
Releases
Features:
An Effective Alternative to the Conventional Pull Box Types in Reducing False Alarms and Tampering Incidences; Clearly Marked Signage Indicating Purpose Of the Release
Application:
Laboratories and Isolated Areas Where Emergency Release of a Door Not Normally Used for Daily Ingress/Egress; Door Interlocks or Buildings With Perimeter Doors on a Centralized Access Control System
Included Components:
(4) Replacement Lens Disks
Installation Category:
Silk Screened 3 Gang Stainless Switch Plate
Department:
Door Hardware

Schlage Electronics 742 – Frequently Asked Questions

1) What is a Schlage 742 emergency break glass release used for?
The 742 break glass assembly is an on-site emergency release for doors that aren't used for daily ingress or egress: individual and partitioned labs, secluded testing areas, isolated work rooms, door interlocks, and perimeter doors running on a centralized access control system. Someone breaks the lens, the circuit releases the electric lock, and the built-in Sonalert horn sounds at the door. It's not intended as the release on a main egress door people use every day.
2) How big is the wall opening for a Schlage 742 break glass unit, and what does it mount to?
Plan on a 3 gang box. The 742 comes on a silk screened 3 gang stainless steel switch plate, so it mounts to a standard three gang wall box rather than a single or double gang. If the wall is already roughed in for a single gang pull station, that box has to be changed out before this plate will land.
3) After someone breaks the glass on a Schlage 742, what do I need to reset it?
A replacement lens disk, and the 742 ships with four of them in the box. That covers the first four actuations before you need to reorder. Facilities standardizing on break glass releases across a building usually keep spare disks on the shelf so a released door can be put back in service the same day.
4) Can I use a break glass release on a door that people walk through every day?
No. The 740 Series releases are meant for non-designated egress doors, the ones purposely provided as exit doors but not used for daily traffic. On a door in regular use, a release that has to be physically broken and then reset with a new lens is the wrong device; that opening wants a request-to-exit device or a pushbutton release instead.
5) Should I install a break glass release or a pull station for emergency door release?
Break glass is the choice where misuse is the problem. The 740 Series break glass concept is preferred over a pull station because it's less vulnerable to tamper actuation, and it cuts false alarms compared with conventional pull box types. A pull station resets in a second, which is exactly why people yank them; breaking a lens disk takes intent and leaves evidence. Trade-off is consumables, since each actuation uses a lens.
6) Will people know what the break glass box on the door is for, or will they think it's a fire alarm?
The plate is silk screened with clearly marked signage indicating the purpose of the release, so it reads as an emergency door release and not a fire pull. That matters in a lab or a secured corridor where a mistaken pull on the wrong device brings the fire department instead of just unlocking a door.
7) Does the Schlage 742 break glass release make noise when it's activated?
Yes, it carries a Sonalert horn on the assembly itself, so the release annunciates locally at the door the moment it's actuated. In a perimeter protection system where locks are controlled centrally, that local sounder tells anyone nearby which door just went free, on top of whatever signal the access control head end gets. If you want a silent release, this isn't the model.
8) How does a break glass release fit into a card access system on perimeter doors?
It sits at the door as the local override on an electrically locked opening. Where electric locking devices are run from central control, an on-site emergency release may be required so someone at the door can free it without the head end, and the 742 fills that role. Same applies to door interlock setups, where one leaf has to be releasable independently of the interlock logic.
How fast can I get the Schlage Electronics 742 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Schlage Electronics 742 come with a warranty?
Absolutely. The Schlage Electronics 742 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Schlage Electronics 742?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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