FIBRE OPTIC PERIMETER PROTECTION SNAKE ™

PERIMETER
FIBRE OPTIC PERIMETER PROTECTION SNAKE ™
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PERIMETER
PERIMETER
SNAKE
FIBRE OPTIC perimeter protection
SNAKE™ is a perimeter
protection system using fibre
optics for the detection, suitable
for internal and external
applications.
It uses opto-phonic technology
to detect, in external
applications, all typical attempts
to climb, cut or break through a
fence and for internal
applications it can indicate
attempts to break through or
penetrate a wall. The advantages
that fibre optic technology
provides for fence mounted
perimeter detection are, among
many, accurate detection, the
ability to cover long distances
without the need for
intermediate power supplies
and in particular the complete
immunity to high frequency
interference from high voltage
lines or atmospheric
disturbances. It is also well
suited to sites with corrosive or
inflammable atmospheres or
subject to extreme
temperatures.
Typical applications are: sensitive
systems for use on chain link
and welded mesh fences and
also as a sensor to detect penetration on the surface or inside
a wall structure (brick, blocks).
OPERATION
The sensing element is the
optical fibre that carries light
signals. These are subjected to
variations directly correlated to
the physical variations in the
cable caused by intrusion
attempts or by variations in the
area surrounding the optical
fibre. The DSP - Digital Signal
Processor- processes and
analyses the variations in the
signal generated by the
differences between the
transmitted and received light
signals. It uses a sophisticated
software algorithm,
discriminating between natural
phenomena, such as wind, rain,
hail, etc, from attempted cut or
climb intrusions.
Also, by simulating the actual
events that must be detected, it
is possible to add these to the
installation in real working
conditions and optimise the
detection parameters, drastically
reducing the potential for false
alarms. SNAKE™ is able to
manage up to four optical fibre
sensors. Each of these can cover
a maximum distance of 2000
metres.
SNAKE™ provides indications of fault, pre-alarm, alarm and fibre cut via
an RS485 serial line, for all the monitored channels.
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PERIMETER
PERIMETER
Components
SENSITIVE FIBRE OPTIC
This is a special fibre optic cable
that is installed along the entire
length of the protected area.
It has a particular characteristic
that makes it sensitive to
mechanical disturbances
produced during attempts to
overcome the protection
(climbing, breaking through,
cutting, etc). These signals are
converted into an electrical
signal that is continuously
monitored by the SNAKE™
processor. Dependent on the
configuration of the perimeter
and the level of sensitivity
required the layout of the fibre
optic can assume different
configurations but in any case
cannot use more than 2000
metres of fibre per zone.
NON-SENSITIVE FIBRE
OPTIC
This is a 9/125 single mode
fibre and is used to connect the
SNAKE™ processor to the
Sensitive Fibre Optic, and it can
be up to 10 km long (5 km. go
and 5 km. return).
For each zone on the SNAKE™
system there must be at least
20 metres of non-sensitive fibre
(10 metres from the processor
to the start of the sensitive
zone and 10 metres from the
end of the sensitive zone to
return to the processor).
SNAKE™ PROCESSOR
There are many versions of the
SNAKE™ processor:
-Stand Alone for 1 fibre optic
zone with 4 relay contact
outputs
-Stand Alone for 2 fibre optic
zones with 6 relay contact
outputs
-Stand Alone for 4 fibre optic
zones with 10 relay contact
outputs
-Multiplex for 2 fibre optic
zones or 4 fibre optic zones for
connection to the
Multiplex2000 system, where
the signals are carried via a
cable (RS485) to the MIND
unit, which can monitor up to
64 sensors simultaneously,
connected to relay boards for
each remote sensor.
It is designed using DSP
technology, which has enormous
processing power available and
allows the implementation of
Fourier transformation, digital
filtering and many others
processes.
It is able to monitor up to four
separate zones (channels) of
2000 metres each, providing for
each pre-alarm, alarm and fibre
cut signals, available via relay
contacts on the Stand Alone or
via RS485 serial line for the
multiplex version.
Using the serial line (USB for
the Stand Alone, RS485 for the
Multiplex) it is possible to set
the system parameters, monitor
and record the signals directly
on a PC using the dedicated
software. All versions of
SNAKE™ are contained in
appropriate metallic container
for use either in a rack on as a
table version.
SNAKE™ does not need any
power supplies in the field.
SNAKE™ is resistant to
weather conditions.
SNAKE™ is resistant to
electromagnetic interference.
SNAKE™ is particularly
suited for environments
with corrosive or
inflammable atmospheres.
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PERIMETER
SNAKE - System configurations
Available versions
Connectors
OUT
IN
SNAKE
ZONE A (CHANNEL A)
Joint
SENSITIVE FIBER - Max 2000 mt. for channel
SNAKE™ STAND ALONE
The SNAKE™ Stand Alone
sensor is designed for those
installations where there is no
requirement to deploy a
Multiplex system. The system
provides pre-alarm, alarm and
fibre cut indications using relay
contacts. Each relay can be
programmed using
PSW2000SA Management
Software to provide one or
more simultaneous signals.
There are three versions of the
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stand alone system:
-Single zone with four relay
contact outputs
-2 zone with 6 relay contact
outputs
-4 zone with 10 relay contact
outputs
SNAKE™ MULTIPLEX
The SNAKE™ Multiplex sensor
is, in general, the same as
described for the SNAKE™
Stand Alone. The difference is in
the fact that it can be integrated
directly into the Multiplex 2000
system, a system that is able to
interconnect, using a single
data/power cable, up to 64
different sensors to a single
Universal Communications
Processor (MIND).
This unit is able to manage and
output the signals provided by
the sensors using central relay
output boards.
Management of all the sensor
functions is performed using a
special software package
running under Windows
95/98/2000/NT/XP/Vista.
There are two versions of the
multiplex system:
- 2 zones
- 4 zones
Joint
NO-SENSITIVE FIBER - Min. 10 mt - Max 5 Km.
Fence
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TECHNICAL SPECIFICATIONS
Coverage per unit
Parameter Set-Up
PC connection
Local relay outputs
Cabinet
Cabinet dim. (LxHxD)
Weight
Operating temperature
Relative humidity
Power supply
Current max
Stand-Alone
2000 meters (single pass)
1000 meters (doble pass)
Local using PC
USB
4 (1 zone)
6 (2 zone)
10 (4 zone)
Metallic box
220x48x180 mm
1,5 kg.
-30° +70°C
90%
10,5÷16 Vcc (12Volt nom.)
280mA @ 12Vcc
Multiplex
2000 meters (single pass)
1000 meters (doble pass)
Remote using PC
COM115
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Rack mount metallic box
220x48x180 mm
1,5 kg.
-30° +70°C
90%
10,5÷16 Vcc (12Volt nom.)
150mA @ 12Vcc
Retailer of confidence
Copyright by GPS Standard SpA
The rights of translation, reproduction or complete or partial amendment, by any means, are reserved in all countries.
GPS Standard reserves the right to modify the technical characteristics and prices without prior notice.
The information provided in this document is subject to modification and/or errors.
For detailed information refer to GPS Standard.
N. doc: SNAKE/02/10 - March 2010
GPS STANDARD S.P.A.
Fraz. Arnad Le Vieux, 47 • 11020 Arnad (AO) - Italy • Ph. +39 0125 96 86 11 • Fax +39 0125 96 60 43
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