This reports the configured delay, in seconds, before the system's major-alarm output relay actually activates after a major alarm condition is first detected, a debounce timer preventing the relay, which likely drives an external siren, light, or dry-contact notification to a building management system, from chattering on brief transient faults. Too short a delay causes the relay to trip on momentary blips that self-clear, generating false external alarms, while too long a delay means real, persistent major faults take longer to reach whatever external system depends on that relay contact. An admin tuning this for a site prone to brief transient voltage sags might lengthen this delay slightly so the external alarm relay only trips on faults that persist past that debounce window.