Autronica BS-320 User's Guide download pdf (Page 32)

Operation Mode

Operator's Handbook, AutroSafe Interactive Fire Alarm System, Release 3, ASAFE-FO/FE Rev. I, 2009-02-27,

Autronica Fire and Security AS

Page 30

3.18.5 Delayed Coincidence Detection Zones

Detection zones configured as Delayed Coincidence Detection Zones

have the following properties:

In Day Mode (Immediate Output Actioning is disabled), outputs that

are configured to be activated by these detection zones will operate

according to their actual configuration, i.e. Silent Alarm, Small Alarm

or Large Alarm as follows:

When a fire alarm signal from the first detector in alarm is received,

the following will occur:

1. The detection zone will enter the Silent Alarm state, and all

FPE outputs configured to be activated on Silent Alarm will be

activated. The (T1) delay period will start.

2. When the T1 delay period expires, the detection zone will

enter the Small Alarm state. All FPE outputs configured to be

activated on Small Alarm will be activated. The (T2) delay

period will start.

3. When the T2 delay period expires, the detection zone will

enter the Large Alarm state. All FPE outputs configured to be

activated on Large Alarm will operate.

Note that, at any time, if an alarm from a second detector within the

same detection zone is received, the detection zone will always enter

the Large Alarm State. This will mean that all (not yet activated) FPE's

configured to be activated on Silent, Small and Large Alarm will be

activated.

Pressing the reset button during a delay period will terminate the

delay period (T1 or T2).

In Night Mode (Immediate Output Actioning is enabled), outputs are

always activated on the first detector in alarm and the system will

always enter the Large Alarm state. As with Day Mode this will mean

that all (not yet activated) FPE's configured to be activated on Silent,

Small and Large Alarm will operate.

In an alarm situation, the actioning of outputs will behave as described

above, provided that;

• the detection zone has been defined as a Delayed Coincidence

detection zone (configurable)

and

• the point(s) in this Delayed Action detection zone has been set to

point delay ON (the default configuration)

Note that when a manual call-point (point delay OFF) is

activated, or when a Heat Detector (point delay OFF) sends an

alarm signal, a Delayed Coincidence detection zone will always

enter the Large Alarm state directly, regardless of Day or Night

Mode.

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