Sequentially confirmed activation

This requires two independent detectors to activate within 30 to 60minutes. The 30 to 60 minutes will be programmed at the control unit.

For installation of movement detectors providing sequential confirmation the following applies:

• Different technologies (may overlap)
• Same technologies (may not overlap) except Dual Technology Detectors
• Other detectors must not be triggered by the same “event”, for example 2 door contacts installed on same door.

Examples of permitted overlapping configurations:

• Passive and dual technology detectors
• 2 dual technology detectors

Examples of sequential configuration:

• 1 movement detector (as above) and
• vibration detector
• breaking glass detector
• foil-on-glass detector
• door contacts

An alarm condition from the first detector should generate an unconfirmed activation. If there is a subsequent alarm within the confirmation time then an unambiguous sequentially confirmed activation should be signalled.  If a separate detector does not activate within the confirmation time the system should reinstate automatically.

Following the activation of the first detector, if a second (confirmed) detector does not activate within the confirmation period the following applies:

• Reinstatement of the first detector if possible.
• If not isolate and signal isolation to the ARC.
• If it is a perimeter detector the ARC must initiate key holder action (This needs to be agreed with the ARC).
• If the entry door is isolated alternative means to initiate entry must be provided. An example of this could be a PIR.