Schlage Electronics 623RD-EX-DA, 1-5/8" Mushroom Button, Single Gang, Red, "PUSH TO EXIT", Delayed action

The Schlage 623RD-EX-DA is a 1-5/8-inch red mushroom push-to-exit button with delayed action, mounted on a single gang faceplate. If you've been searching for the "623RD" model, this is it - the RD suffix identifies the red button color, EX means the button face is printed with "PUSH TO EXIT" in white, and DA means the delayed action version with an adjustable 0 to 60 second time delay built in. It's part of Schlage's 620 series heavy-duty pushbuttons, originally developed under the Locknetics brand before Schlage acquired that product line. Many access control contractors still reference these as Locknetics pushbuttons and find them searching 623RD.

What Delayed Action Means and When to Use It

The standard push-to-exit button activates its relay the moment you press it. The delayed action version doesn't. With the DA, pressing the button starts a timer. The relay doesn't activate until that timer counts down - adjustable anywhere from 0 to 60 seconds depending on how the unit is wired and configured. The door stays locked during the delay.

This matters in specific security scenarios. Schools and government buildings use delayed action buttons in vestibule or mantrap configurations where security staff need time to observe who is pressing the button before the door releases. Courthouses, detention facilities, and pharmaceutical distribution centers use delayed exit to enforce a brief hold that deters unauthorized tailgating. The 60-second maximum delay is enough time to alert a security station while not trapping someone indefinitely if a legitimate exit request was made.

If your application doesn't need a delay - if occupants just need a simple push to request exit - the standard 623RD-EX without the DA suffix is the right choice. The delay is not adjustable at the button itself in most installations; it's set during wiring and configuration.

Decoding the 620 Series Model Numbers

The Schlage 620 series uses a consistent naming structure that tells you what you're getting once you know the codes. The first number identifies the button size: 621 is the 1-1/4-inch button, 623 is the 1-5/8-inch button, both in a mushroom shape. Larger format options are also available. The suffix codes stack on:

RD means red button. GID means glow-in-the-dark. No color suffix means aluminum button. EX means the button face carries PUSH TO EXIT labeling. DA means delayed action. DP means double pole double throw relay output. NS means narrow stile plate. HDP means heavy-duty plate.

The 623RD-EX-DA is specifically the 1-5/8-inch red mushroom button, with "PUSH TO EXIT" label, on a standard single gang plate, with the delayed action relay.

Screw Terminals and Optional Illumination

Schlage made the 620 series installer-friendly with screw terminal connections rather than pigtail wires - easier to connect, easier to service. The optional L2/ILL illuminated PC board is available separately and adds green and red LED indicators to the button cone, giving visual status feedback at the button location. This is useful on high-visibility doors where occupants need to know whether the system accepted their exit request.

Specifications

Model: Schlage Electronics 623RD-EX-DA

Also Known As: Locknetics 623RD-EX-DA

Series: Schlage 620/623 Heavy Duty Pushbutton Series

Button Diameter: 1-5/8" mushroom

Plate Style: Single gang standard

Button Color: Red

Label: PUSH TO EXIT (white text)

Action Type: Delayed action, 0 to 60 seconds adjustable

Connections: Screw terminal

Optional Add-on: L2/ILL illuminated PC board (green/red LEDs, sold separately)

Applications: Access controlled doors, electric strikes, magnetic locks, vestibules, government facilities, schools, pharmaceutical storage, request-to-exit systems

American Locksets has stocked Schlage and Locknetics pushbuttons since 2001.