Manual VID-W20L030_1 2008.doc / page 3 (10)
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1 Introduction
The VID-W20L030 is a highly sensitive Passive Infrared Detector designed for detection outdoors with a wide
angle, volumetric differential field of view. It incorporates microprocessor-controlled signal processing including
signal shape analysis, adaptive threshold level by feedback of environmental effects, temperature compensation
and rejection of disturbance signals.
Sensitivity adjustments are done with DIP-Switches for each individual unit in function of the required detection
range in order to adapt to the specific needs of an installation.
2 Features
Multi Zone Volumetric with Creep Zones
4 Meter (13 Feet) Mounting Height
Advanced Tamper Detection
Low Power Consumption – Ideal for Wireless and Solar Applications
Wide Power Supply Range
Integrated Bracket for Wall Mounting
3 Mounting and Installation
The mounting structure should be sold enough to resist significant movement in windy conditions. Movement of the
VID-W20L030 caused by vibrations or other movements will result in changing fields of view covered by the VID-
W20L030 and could cause erratic signals. These unwanted signals may lead to an increase in the alarm threshold
level which reduces the detection probability or in certain cases can lead to unwanted alarms.
The stainless steel bracket is ideally suited for wall mounting. For pole mounting the VID-PA is available (the pole
mount bracket comes with two strap bands for poles with diameters of 4 – 16cm). For further information please
refer to 16.2.
It is very important that the cover of the detector is tightened securely. Tighten the two screws to the point where
it cannot be tightened further with reasonable force. There should be less than 1mm gap between the cover and
the bottom part of the housing.
The detectors are fitted with two M16 cable entry points. The nut on the cable entry assembly should be tightened
to clamp the cable in place. If the cable diameter is too small to be held properly, insulation tape should be wound
around the cable to increase the outside diameter to a suitable size.
4 Connecting the VID-W20L030
For the definition of the electronic board and terminal block see appendix 19.1.
5 Alarm
Signalling
There are two types of alarm outputs on the VID-W20L030:
•
one SPST potential-free relay contact
•
one open collector transistor output
Cover Switch
A tamper detection switch is fitted for the cover, this contact opens when the cover is opened.
6 Field of View
The VID-W20L030 has a volumetric field of view with differential detection areas. For the nominal range and width
at that range see table below.
7 Alignment
The detection range of a PIR detector is not limited but it is a function of the target size, speed and temperature
contrast against its background. The VID-W20L030 should be aligned so that a natural or artificial background at
the end of the range terminates the field of view.
Vertical alignment is optimal when the upper edge of the field of view is at 1.5 to 2.5m (5 to 8 ft) above ground at
the end of the required detection range. Use the grove on the top of the detector for correct alignment. This line of
sight corresponds to the upper edge of the detection pattern. To limit the detection range, a terminating screen can
be used to prevent detection of targets beyond the required range.
Definition VID-W20L030
Nominal Range
30m (100 feet)
Width at Nom. Range
20m (65 feet)