Schlage 621BK Da Delayed Action Button Switch Single Gang

Product Description

The SCHLAGE 621BK DA is a single-gang delayed action button switch designed for low-voltage access control and door release applications. The button features a 0 to 60 second adjustable delay, allowing the door latch or electric strike to remain released for a set interval after activation. The black button finish measures 1.25 inches and mounts in a standard single-gang electrical box. This device is typically installed by licensed electricians or access control technicians as part of a building entry or egress system.

This button switch is suited for commercial and light industrial access control installations where a timed door release is required. Common applications include ADA-compliant automatic door openers, electric strike systems, and magnetic lock egress points. The delayed action function supports code-compliant egress timing requirements in controlled-access corridors, vestibules, and secure entry points.

Key Features

• Adjustable delay range of 0 to 60 seconds for flexible egress timing
• Black button finish for a clean, professional appearance in commercial installations
• Single-gang form factor fits standard electrical boxes
• 1.25 inch button size provides a clear, accessible actuation surface
• Designed for low-voltage access control circuits

Compatibility

Designed as an OEM-style replacement or new-installation component for single-gang access control button applications in commercial door control systems.

Installation Notes

Installation should be performed by a licensed electrician or qualified access control technician. De-energize the access control circuit and confirm zero voltage at the wiring terminals before wiring or servicing. Mount in a standard single-gang electrical box per local electrical codes and NEC guidelines. Verify delay timing settings match the egress compliance requirements for the specific installation before commissioning.