User Manual

System Operation 151274-L8

8-16

8.7.1 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 8-3.)

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 and the “Pre-Alarm” output will deactivate. (Also refer to Table 8-3.)

Reduce detector spacing to 0.7 times the linear spacing in accordance with NFPA 72.

Note: Refer to Table 8-2 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 8-3: Single Interlock Zone Operation

Inputs Output Results

1st Addressable Detector

X X X X

2nd Addressable Detector

X X X X

Manual Release Station

X X X X

Normal

Pre-Alert

Release and General Alarm