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The passive infrared motion detector IR261 is
designed for indoor surveillance applications for
intruder alarm systems. Ceiling mounting introduces
the possibility of overlooking obstacles in the
surveillance area.
A pyroelectric dual sensor is placed at the focus of a
multisegment lens, which subdivides the coverage
area into different detection zones. This arrangement
provides 33 pairs of sensitive zones
.
The sensor receives infrared energy from its
environment, which is used by the detector as
reference. As long as this reference is stable, the
alarm relay remains energised. When a person enters
or leaves one of the sensitive zones, the detector
registers a rapid change in the amount of infrared
energy received. The subsequent electrical signal
from the sensor is processed for alarm triggering.
Within the specified environmental conditions, the
detector is sensitive to intruders, thereby covering a
wide range of walking speeds. However, the detection
capacity decreases when there is only a slight
difference between the background temperature and
that of the intruder.
Slow changes in the infrared energy level caused e.g.
by temperature changes of walls etc., are
automatically compensated by the detector and
do
not cause alarm.
Installation instructions
Mount the detector on a stable ceiling surface free
from vibrations.
Several detectors may be installed in one room.
Overlapping zone patterns do not create any false
alarm problems.
Align the detectors in such a way that the main
direction in which an intruder is expected to move is
at a right angle to the sensitive zones.
The detector will not react to movements behind
walls, large pieces of furniture, pillars, big plants or
glass.
Do not point the sensitive zones at objects that
are subject to rapid temperature changes, e.g.
heaters, heated surfaces, air conditioning outlets,
windows.
Mounting height between 2m and 5m.
Avoid heights greater than 5m because of
reduced detection sensitivity.
Mounting
1.
Open the detector
.
- Slide the release lever to the direction of the arrow.
The sensor part can now be detached from the
detector base.
2.
Feed the cable through the opening in the detector
base or through the break-out cable entry on the
side
.
3.
Mount the detector base on a solid surface inside
the room, using the enclosed screws.
4.
Connect the terminals
. The terminal connections
are best suited for solid core cables. When using
multicore cables, one or more of the following
procedures must be carried out:
- The bare wire must be doubled over before it is
inserted into the clamp.
- A crimp must be attached to the cable ends for the
insertion into the clamp.
5.
Pattern setting according to the separate chapter
"Programming".
6.
Put the sensor unit into the detector base (mark the
arrow) and push until the release lever clicks.
7.
Tighten the enclosed locking screw.
Programming
Alarm LED active / inactive
Alarm LED (red)
Switch 1
LED active
LED lights up in case of alarm,
default
LED not active:
The LED becomes active when
connecting the wire terminal 7
(L/C) with - 12V.
The LED can be switched to
active / inactive mode by means
of external switches.
Alarm memory
Alarm memory (yellow)
Switch 2
Active
Auto reset,
memory
:
As an alarm is activated, the
yellow LED flashes for 3
minutes and remains lit for 47
minutes. Afterwards it is
automatically reset and the
memory is cleared.
Not active
Memory OFF,
default
Type of alarm contact
Alarm contact
Switch 3
N/O: relay is normally open and
closes when alarm is activated
N/C: relay is normally closed
and opens when alarm is
activated,
default
Detection sensitivity
Sensitivity
Switches 4 &
5
120%
100%,
default
80%
60%
Alarm pulse counter
Number of pulses after alarm
activation (within 25 sec)
Switches 6 &
7
1 x
Alarm
2 x
Alarm
default
3 x
Alarm
Recommended
for the
prevention of
false alarm
caused by
temperature
fluctuation
4 x
Alarm
Commissioning
Check that switch 1 is in position [ON], see
"Programming".
1.
Switch the power on.
2.
Wait for one minute until the detector is ready for
operation and the red alarm LED stops flashing.
3.
Walk upright through the surveillance area in the
direction of the arrows, at approximately one step
per second.
- Check if an alarm is activated. The detector must
trigger an alarm, even when the furthest end of the
coverage area is crossed.
4.
When the walk test is finished, ensure that the
detector is in the correct operating mode again, i.e.
check the position of the programming switches.
Maintenance
Repeat the walk test regularly and check the IR
window for soiling to ensure that the detector is
functional.
Note:
Each
modification
or
manipulation
to
components of a detector, the detector looses its
intented function and the approval expires.
Troubleshooting
Detector does not respond
- Check supply voltage and polarity.
No alarm indication on the detector
- Check programming switches.
No alarm
- Check alarm relay.
- Check alarm line.
Permanent or temporary alarm
Switch the alarm indication on the detector to [ON],
cover the detector window with a cardboard box and
wait for 2 minutes.
- If the red LED lights up, the detector is defective.
- If the LED does not light up:
- Locate sources of interference in the coverage
area and eliminate them.
- Check the sensitivity settings.
- Reposition the detector.
Insufficient range
- Check the window for soiling.
- See also installation instructions and/or range
adjustments.
Technical data
Supply voltage (nom. 12V) ................. 10.5 to 30.0V
DC
-. max ripple (0...100 Hz) .................................. 2.0Vpp
Current consumption (quiescent, at 12V) .......... 25mA
-. ....................................................... +2mA at L/C use
Alarm output ........................................ electronic relay
-. relay contact (opens at alarm)... 24V(
AC/DC)
/ 250mA
-. alarm holding time .................................... 2 seconds
Alarm / walktest indication .................................... LED
Tamper switch .................... closed with cover in place
-. contact rating ............................. 30V(
AC/DC)
/ 250mA
Evaluation mode................................. "HIGH" / "LOW"
Sensitivity ........................................................ 4 levels
Ambient conditions:
- operating temperature ........................ -15°C...+55°C
- storage temperature ........................... -15°C...+55°C
- humidity (EN60721) .................................. <95% rH
Details for ordering
IR261 Passive infrared detector VBPZ:5667770001
EC Declaration of Conformity
Hereby, Vanderbilt International (IRL) Ltd declares
that this equipment type is in compliance with all
relevant EU Directives for CE marking. From
20/04/2016 it is in compliance with Directive
2014/30/EU (Electromagnetic Compatibility
Directive.
The full text of the EU declaration of conformity is
available at:
http://pcd.vanderbiltindustries.com/doc/SPC
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IR261 Instructions for use