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DD 243 gives recommendations for the design, installation and configuration of intruder alarm systems that incorporate alarm confirmation technology for the purpose of signalling notification of an alarm activation to an alarm receiving centre (ARC) and requiring Police Response.
DD 243 includes recommendations intended to minimise the likelihood of false alarms.
DD 243 is intended to be read in conjunction with the Standard EN 50131 (as implemented by PD6662).
DD243 was originally introduced to reduce false alarms during setting/ unsetting and to improve the operation of alarm confirmation. It applies to all new systems incorporating confirmed alarm technology and to existing Police Response systems being upgraded to confirmed alarm technology to re-gain response.
Personal attack (hold-up) alarms whether they are stand-alone or part of an intruder alarm system are not affected by this Draft for Development.
DD243 allows five un-setting methods:
a) System un-set by unlocking the initial entry door.
b) Unlocking entry door disables all confirmation then system un-set internally.
c) Opening entry door disables confirmation (not acceptable to most insurers).
d) System is unset using a proximity fob.
e) Un-setting carried out in conjunction with the Alarm Receiving Centre.
DD243 allows five methods to complete the setting of your system:
a) Key operated shunt lock on final exit door.
b) Push button outside the premises.
c) Door contact on the final exit door.
d) Proximity fob.
e) In conjunction with the Alarm Receiving Centre.
For both un-setting and setting Alertsystems recommend option (d) – using a proximity fob with a system keypad incorporating a proximity reader located just inside the entry/exit door. This provides a simple operation for keyholders and eliminates many alarms caused by entering incorrect user codes.
(Please refer to BSI Website)