Introduction
The LG2 WP # # wireless Passive Infra Red Detectors (PIR) have been designed to
meet the newest and most demanding requirements of the CCTV market. These detec-
tors provide the versatility of wireless whilst meeting and surpassing the requirements
needed for a BS8418 system.
Two detection ranges are available.
30 metres out x 20 metres across or 60 metres out x 4 metres across.
These detectors have a modern artistic styling which disguises the product’s true function
and enables them to blend in with modern architecturally designed buildings.
These new PIR’s use mirror technology instead of Fresnel lenses. The reason for this is
to maximise the optical gain thus allowing a thick EPDM front filtered window to be used.
Additionally many more segments can be used to give greater area saturation.
The mirrors have
adaptive focal length
which regulates the image size no matter where
it is in the field of view. This enables accurate detection of a target at various speeds and
distances and also makes it easier to filter out small animal movements.
In addition, the
Quad in line
pyro sensor splits the zones and can be gated either as (A +
B) or (A or B)
The PIR also contains a shock sensor to detect physical attack and IR transmission anti-
masking. Light and thermal sensors allow the detector to compensate for the outdoor
environment. The PIR continuously poles in to verify that it is operational. Every time it
transmits it also sends other information such as battery condition as well as pulse count
settings and software revision number. This detector operates from two standard alka-
line C cells and uses a charge pump to provide optimum performance even when the
batteries are nearly depleted.
How the system works.
At the heart of the system there is a Masthead which receives the data transmitted by the
PIR detectors.
Each time a PIR detects movement it transmits data to a masthead which then passes
the data via an RS232 link to a control unit such as the LGRU16 Luminite relay unit.
This control unit has volt free contacts to provide up to 16 individual alarms and tampers.
Additionally it will provide global tamper, low battery and missed call-ins. There is also a
text output for video insertion on some makes of DVR that have POS inputs.
Alternatively, the masthead may be connected directly to some specific DVR’s which
have been adapted to the Genesis protocol. This method greatly reduces wiring and
time. Current makes are:
RS232 interfaces:
Videoswitch, HeiTel (Vista)
IP Interfaces:
DM, IMMIX
&
Panasonic.
Also SMTP email alerts of trouble conditions
such as Low Battery, Missed Call etc.
LG2 WP-3020 & WP-6004 Wireless PIR Detector Installation Handbook
Page 4.
