Specifications

Operating the Panel

Panel Operation During Various Hazard States

The escalating hazard zone states include Idle, Alert, Alarm and Release. They are defined based on the status of

Hazard Area input zone(s), correlated Abort Switch and Manual Release Switch.

Hazard Idle

• No correlated alarm zone active.

• Release Timer is not started.

• Manual Release Delay Timer is not started.

• Abort Switch is off.

• Manual Release Switch is off.

• Corresponding NAC circuit is off.

• Releasing circuit(s) is off.

Hazard Alert (or equivalently first Alarm in Cross-zoned Application)

• The panel enters the Hazard Alert state when

• a single alarm comes in for a cross-zoned hazard. For non cross-zoned hazard area, a single alarm will put

hazard into Hazard Alarm state directly.

• the Abort Switch becomes active during Hazard Alarm state, so that the hazard area state downgrades from

Hazard Alarm to Hazard Alert.

• Release Timer is not started.

• Manual Release Delay Timer is not started.

• Correlated NAC circuit(s) turns on at alert rate.

Hazard Alarm (pre-discharge, or equivalently second Alarm in Cross-zoned Application)

• The panel enters the Hazard Alarm state when

• it detects the confirming alarm for hazard area (single alarm active for the non cross-zoned system, or 2nd

alarm active in the cross-zoned system), or

• Manual Release Switch is active.

• Release Timer (RT) is started when the panel enters Hazard Alarm state after by detecting the 2nd alarm in

cross-zoned hazard or 1st alarm in non cross-zoned hazard.

• Manual Release Delay Timer is started when the panel enters Hazard Alarm state by detecting the correlated

Manual Release Switch active.

• Releasing circuit(s) will be activated after the Release Timer or Manual Release Timer expires.

• Corresponding NAC(s) turns on at alarm rate.

• During Hazard Alarm State, when the release timer is running and the Abort Switch turns on, the hazard area

state will change from Hazard Alarm to Hazard Alert. Release Timer is held and the corresponding NAC sounds

the Alert rate. If the Abort Switch is released, the hazard state will go back to Hazard Alarm and the Release

Timer resumes running. The value of release timer depends on Abort Delay Type. The corresponding NAC

sounds Alarm rate again.

Hazard Release

• Panel enters Hazard Release when the Release Timer or Manual Release Timer expires. The correlated

releasing circuit is activated.

• NAC code for Hazard Release state is steady.