ERNITEC PIR-045 Manual

Introduction
The PIR-045 is a highly sensitive Passive Infrared Detector designed for detection outdoors with a narrow, curtain-shaped
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.
In addition to the hardware settings, adjustments can be made in a two way communication mode and signals displayed on
a PC screen by using the optional installation software and RS 485 com munication interface module.
Mounting and Installation
The mounting structure should be stiff enough and resist to significant deflections in windy conditions. Movement of the PIR-
045 caused by vibrations or other movements will result in swings of the field of view covered by the PIR-045 and could
cause disturbance signals. These unwanted signals may lead to an increase of the alarm threshold level which reduces the
detection probability or in certain cases can lead to unwanted alarms.
The universal bracket is equally suited for wall mounting (using screws) or pole mounting (using steel bands through the
slots).
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It is very important that the cover of the PIR-045 is securely tightened. It must be tightened with the two screws to the
point where it cannot be closed further with reasonable force. There will then be hardly any gap between the cover and
the bottom part of the housing (considerably less than 1 mm).
The cable entry assembly should not be changed without authorisation by the manufacturer. It is specifically designed to
allow air entry and exit so that the inside of the PIR-045 is always at atmospheric pressure. This prevents moisture being
sucked into the PIR-045 by drop of internal pressure likely to happen when rainfall rapidly cools down a unit warmed up in
the sun.
The nut on the cable entry assembly should be tightened to clamp the cable in place with the nylon grip. If the cable diameter
is too small to be held by the grip, insulation tape should be wound around the cable to increase the outside diameter to a
suitable size.
Connecting the PIR-045
For the definition of the connector board and terminal block see annex 1.
Alarm Signalling
There are three types of alarm signalling from the
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one SPST potential-free relay contact
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an open collector transistor to negative supply rail
•
an RS 485 two way communication link (see annex 2 for details)
The relay contact opens and the transistor switches to low resistance on alarm.
2800-00006
PIR-045
PASSIVE INFRARED DETECTOR
PIR-045
:
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