|DC||Door Contact (Grade 3)|
|AM PIR||Passive Infra Red Movement Detector, with Anti-mask Capability (Grade 3)|
|AM DT||Dual Technology Movement Detector, with Anti-mask Capability (Grade 3)|
|BG||Break Glass Detector|
For a Grade 3 System, Grade 3 type Anti-mask detectors are a requirement.
DD243 still applies regarding overlapping coverage, so PIR coverage must not overlap.
It is acceptable for DT coverage to overlap with PIR or other DT’s.
A 45 second maximum entry timer is permitted, with a further fixed 30 second warning period, before an entry (unconfirmed) Alarm is notified to the ARC.
Grade 3 Systems would normally provide an ATS (preferably Dual path) with at least 1 self powered audible WD (SAB/SCB), or 2 remotely powered WD’s.
Grade 3 systems require 24 hours standby when using a ‘Type A’ PS.
This can be reduced to 12 hours, providing ‘mains failure’ is individually notified to the ARC.
|ACE||Ancillary Control Equipment||(eg Exit Terminator Switch)|
|PACE||Portable Ancillary Control Equipment||(eg Remote Keyfob)|
|CIE||Control and Indicating Equipment||(eg Alarm Panel)|
|WD||Warning Device||(eg Bell Box, Sounders, Strobes)|
|ATS||Alarm Transmission System||(Signalling System)|
|ARC||Alarm Receiving Centre||(Monitoring Station)|
|PS||Power Supply||(Power Supply for I & HAS)|