What does an exit alarm actually do

An exit alarm is a locking device built around a single job: let people leave through a secondary door in an emergency without letting them use that door as a casual exit the rest of the time. The Von Duprin Guard-X 2670 does this with a stainless steel deadbolt rated to 1,600 pounds of force resistance, a 100-decibel alarm, and an armed indicator light, all built into one non-handed housing. It's UL Listed for both panic exit hardware and fire exit hardware, complies with NFPA 101 Life Safety Code, and carries a 10-year mechanical warranty with a 1-year electrical warranty. Detex takes a different approach with the ECL and EAX lines. The ECL is a single-point deadlocking exit control lock, often fire-rated, built for openings where forced entry resistance matters as much as alarm function. The EAX is a smaller, battery-powered surface or flush-mount alarm meant for doors where you mainly need to know someone tried to use an exit they shouldn't have.

Guard-X 2670 replacement parts you'll order most

Six components account for nearly every Guard-X repair call. The 9-volt alarm battery is the most frequent replacement, and we'd recommend swapping it proactively every six months on high-traffic secondary exits, because a dead battery means the device still locks and unlocks mechanically but produces zero alarm sound on an unauthorized push, which is the worst possible failure mode for a deterrent lock. The Schlage SC-1 cylinder ships standard with the 2670 and is re-keyable through any Schlage-authorized locksmith, or factory-keyed to your building's master system. Beyond those two, the lockside cover kit, hingeside cover, retainer nut, and disarming label round out the parts you're most likely searching for after a few years of field use.

Choosing between Guard-X, ECL, and EAX

If the opening needs a hardened deadbolt and a loud local alarm on one secondary door, the Guard-X 2670 is the standard choice and the one you'll see most often in retail and light commercial settings. If the door is fire-rated and you need single-point deadlocking with delayed egress capability, look at the Detex ECL line instead. If you just need a compact, battery-powered alarm bolted to an existing door or wall, without replacing the lock itself, the EAX series fits that role and installs faster since it doesn't require swapping the existing lockset.

Wiring and power options

Both the Guard-X and the EAX run standard on a 9V battery, with the EAX also available in an externally powered 24VAC/DC configuration for installations where you don't want to manage battery swaps on a high-traffic door. The Guard-X has no hardwired option. If you're pairing an exit alarm with a building's central monitoring or fire panel, that integration runs through the dry contact output on the EAX, not through the Guard-X, which is designed as a standalone local alarm.

Browse full diagrams and part numbers for Von Duprin hardware and Detex hardware, or jump to our complete exit alarm parts and diagrams guide for full component breakdowns by model.

Why order exit alarm parts from Security Parts

Security Parts has supplied commercial door hardware replacement parts since 2001, and exit alarms are one of the categories we field the most calls on, mainly because Guard-X and Detex components aren't something a facility manager can usually walk into a hardware store and find. We stock OEM and aftermarket exit alarm parts for both current and older production models, ship most in-stock items same day, and offer free shipping on orders of $300 and up. If you're not sure which battery, cylinder, or cover kit matches your installed unit, our team can confirm the exact part from a model number or a few photos before you order.

Is the Von Duprin Guard-X fire rated?

No. The deadbolt isn't spring loaded, so there's no positive latching, which disqualifies it from fire door labeling.

Does the Guard-X 2670 come with a cylinder?

Yes, it ships with a Schlage SC-1 5-pin cylinder included, and it can be ordered factory-keyed to match an existing system.

How often should I replace the 9V battery?

Every six months on high-use secondary exits. A dead battery means silent failure, no alarm sound on an unauthorized push.

What's the difference between an exit alarm and an exit control lock?

An exit alarm like the Guard-X sounds locally on unauthorized use. An exit control lock like the Detex ECL adds single-point deadlocking and is often used where fire rating and delayed egress matter.

Can I get a double-door version of the Guard-X?

Yes, the 2609 is the double door variant and coordinates alarm function between two active leaves on a paired opening.

Do you carry exit alarm parts for older or discontinued models?

Often, yes. Send us the stamped model number from the unit and we'll confirm availability, even on models no longer in current production.

How fast can I get exit alarm parts shipped?

Most in-stock exit alarm parts ship same day, with free shipping on orders of $300 and up.