Intruder EN Grade Two

DC	Door Contact (Grade 2)
PIR	Passive Infra Red Movement Detector (Grade 2)
DT	Dual Technology Movement Detector (Grade 2)
BG	Break Glass Detector

For a Grade 2 System, Anti-mask detectors are not 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 Entry (unconfirmed) Alarm is notified to the ARC.

Grade 2 Systems would normally provide an ATS with at least 1 self powered audible WD (SAB/SCB), or 2 remotely powered WD’s.

Grade 2 Systems require 12 hours standby when using a ‘Type A’ PS.

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)