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IntelliKnight 5808 Installation Manual 151274-L8

8-17

8.7.2 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.

Conditions Required for a 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 a General Alarm Output Activation

If two addressable detectors, a manual release switch is activated, or an interlock switch is active, the “Pre-

Alert”, 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,

and the “Alert” outputs will deactivate.

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.

Each Double Interlock Zone input requires at least one Interlock/pressure switch

Table 8-4: Double Interlock Zone Operation

Inputs Output Results

1st Addressable Detector

X X X X X

X X X

2nd Addressable Detector

X X X X X

X X X

Manual Release Station

X X X X

Interlock/Pressure Switch

X X X

X X X X X

Normal

Pre-Alert

Pre-Alert and General Alarm

Release and General Alarm