Double Interlock Zone Releasing - Honeywell 6820EVS Installation And Optimization Manual

LS10144-001SK-E
will activate and the "Pre-Alarm" output will deactivate. (Also refer to Table 10-4.)
Inputs
1st Addressable Detector
2nd Addressable Detector
Manual Release Station
10.7.2

Double Interlock Zone Releasing

A Double Interlock Zone uses a minimum of two addressable detectors, a designated manual release switch, and
an interlock switch input. An interlock switch is typically a dry-contact pressure switch and will be referred to as
an interlock/pressure switch in this document.
Only addressable detectors can be used. No conventional detectors can be used.
Each Double Interlock Zone input requires at least one Interlock/pressure switch and at least one manual release switch.
Conditions Required for a Pre-Alarm Output Activation
If any single addressable detector is activated, the "Pre-Alarm" output will activate. This alerts the user that the
initial stages required for a release condition are present. (Also refer to Table 10-4.)
Conditions Required for a General Alarm Output Activation
If two addressable detectors, a manual release switch is activated, or an interlock switch is active, the "Pre-
Alarm", and "General Alarm" outputs will activate.
Conditions Required for a Release Output Activation
Any release requires the activation of an interlock switch, and either a manual release switch or 2 activated
addressable detectors. When these conditions are met, the "Release" and "General Alarm" outputs will activate,
Table 10-4: Single Interlock Zone Operation
x
x
Important!
10-18
Output Results
x x
x
x x
System Operation
x
x x
x x