
System Operation
151295 8-13
8.5.1 Single Interlock Zone Releasing
A single interlock zone utilizes a minimum of two addressable detectors, and a designated
manual release switch.
Conditions Required for an Pre-Alert Output Activation
If any single addressable detector is activated, the "Pre-Alert" output will activate. This alerts
the user that the initial stages required for a release condition are present. (Also refer to Table
8-4.)
Conditions required for an General Alarm and Release Output Activation
If two or more addressable detectors, or a manual release switch activate, the "Alarm" and the
"Release" outputs will activate. (Also refer to Table 8-4.)
Note: Refer to Table 8-3 for approved releasing solenoids and ratings.
Important!
Only addressable detectors can be used. No conventional detectors can be used.
Each Single Interlock Zone input requires at least one manual release switch.
Table 8-4: Input Conditions and Output Results
Inputs Output Results
1st Addressable Detector
2nd Addressable Detector
Manual Release Station
Normal
Pre-Alert
Pre-Alert
Release and General Alarm
Release and General Alarm
Release and General Alarm
Release and General Alarm
Release and General Alarm
Important!
Detectors must be installed at 0.7 times the linear spacing as described in NFPA 72.
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