1
GJD mini Opal
30 metre External PIR
Installation and Set Up Guide
The mini Opal is an attractively styled, 30 metre Passive
Infrared (PIR) detector that works with GJD security
lighting controllers. The mini Opal has additional
advanced PIR features as follows:
Sensor mounted white-light filter (sun glasses) to
prevent false detections on sunny days
Dual tamper switches for case and wall-mount tamper detection
Zone blanking using vertical curtains and horizontal foil for precise area coverage
±90° horizontal and ±45° vertical aim adjustment
Conformally coated electronics for enhanced UV and moisture resilience
Attractive, 21st century styling with a protective cover to disguise sensor direction
Field of View
The mini Opal has 10 Fresnel lenses that focus areas onto the receptor. The 10 lens areas
give 10 fields of view as follows: 5 long-range (lenses 0 to 4) and 5 medium- to shortrange (lenses 5 to 9). Movement between fields produces a stronger response than
movement towards or away from the sensor in the same field.
The 10 lenses monitor the area in front of the sensor as shown in the figure.
10 20 30 met r es0
15
5
10
15
0
5
10
5
0
1
6
72
8
3
9
4
0
5
1
6
2
7
3
8
4
9
Figure 1: Diagram showing the 10 lenses and their views
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Example Configurations
The following shows four example combinations of angle and blanking settings:
Optimum Height
3
0102030
5°
Figure 2: Sensor 3m high, 0 degree tilt, 30m range
6 Metres
6
0
10 20 30
15°
Figure 3: Sensor 6m high, 9 degree tilt, 30m range
Pet Immunity (lower lenses blanked)
1.5
0102
0
30
-5°
Figure 4: Sensor 1.5m high, -2 degree tilt, 30m range
Curtain Coverage (upper lenses blanked)
6
0
5
45°
07.5 7.5
Figure 5: Sensor 6m high, 45 degree tilt, 5m range
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Install
Caution: To avoid damage to your unit or incorrect fitting, take account of the following
cautions:
1) The mini Opal is designed for mounting vertically on a flat surface. Do not mount it
on the underside of a roof edge because the sensor cannot be angled correctly in this
orientation.
2) The range and focus of the mini Opal can be affected by grease on the lens or sensor.
Always hold the lens by the edges and do not touch the sensor. If touched, clean
with an appropriate isopropyl-alcohol based cleaning agent and a soft, lint-free
cloth.
3) Do not install your mini Opal outside during wet conditions such as rain or mist.
Moisture inside the case can cause faults. The moisture will remain in the air-tight
enclosure indefinitely.
Mount
1) Choose a mounting position, it should:
Be 60cm (2ft) from lamps
If possible, allow the wiring to be run through the wall
Be smooth enough to hold the tamper plate in position and provide a good seal
against the expanded foam back plate
Make allowance for obstacles that may cause a varying thermal image. For
example, trees or shrubs in a wind, ripples on ponds (or large puddles), boiler
flues and animals
2) Using a 3mm hex key to loosen the hex screw and remove the cover.
3) To reveal the two cable access, unscrew the top, plastic wing-nut and, remove the
circuit board and lens unit.
4) The cable entry holes are protected by two sealed grommets. Use a screwdriver to
punch out the centre of the grommet(s) you intend using.
5) Hold the unit to the mounting surface and, mark the location of mounting and
cabling holes.
WARNING: To prevent injury or damage to the unit, do not drill through the holes
in the back of the case.
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WARNING: Always make the appropriate checks to ensure that the surface you are
drilling does not contain mains electrical wiring or plumbing. Failure to do so can
result in injury or death by electric shock.
6) Feed the cable(s) through the grommet(s) and fix the unit in your chosen location
using appropriate fixings (not supplied).
Connect
Caution: To prevent damage to your mini Opal or lighting controller, switch off the
power before making connections.
1) Connect the +, A, S and - wires to the screw-terminal block on the back of the sensor
PCB.
AS
+
Figure 6: Rear of PCB with Output Connections
1) Optionally connect the tamper output on the top PCB to your alarm system.
Note: The twin tamper switches provide a single volts-free, normally-closed alarm
output once the mini Opal is mounted to the wall and the cover is fitted.
Figure 7: mini Opal Tamper Board
1) If required, see Connect External Buzzer or Relay (on page 5).
When the power is applied, the red LED flashes for 0.5 seconds before stopping. The
LED is normally off during operation.
5
Connect External Buzzer or Relay
The unit can drive an external relay output or a piezo buzzer. The component
specifications for the diagrams are:
Diodes: 1N4148/1N4002 or similar - observe the band when connecting
External relay: 12V DC, 470 ohm minimum coil resistance
Piezo buzzer: 12V DC, 3mA, 80dB(A) at one metre
Energizing a relay from the A or S connections
When the external relay is connected to the A connection, it will trigger for every
detection and deactivate immediately. By connecting the relay to the S connection, the
external relay stays active from 60s following the last detection.
+
+
S
S
A
A
mini
Opal
-
-
+
-
12V DC
GJD
Lighting
Controller
Figure 8: External relay wiring diagram
Driving a Piezo Buzzer from the A connection
This configuration can be useful as a temporary measure during your walk-test. The
piezo buzzer will sound every time a detection takes place.
+
+
S
S
A
A
mini
Opal
-
-
+
-
12V DC
GJD
Lighting
Controller
~
Figure 9: Piezo buzzer wiring diagram
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Walk Test
The walk test iterates through the following adjustments until the correct area is
covered.
Tip: The field of view of the mini Opal is affected by the cover. Always perform the walk
test with the cover fitted removing the cover each time you need to make adjustments.
1) Adjust the aim of the sensor, loosen the top and side plastic wing-nuts and swivel
the bracket. Tighten the wing-nuts again and replace the cover.
2) Configure the field of view by blanking lens areas as necessary.
You may want to blank parts of the field using the vertical curtains or by cutting the
foil sticker to size. Apply the sticker to the smooth, rear side of the lens.
3) Adjust the range between 9 and 30 metres using the PCB mounted pot.
9
5 lux
30m
24hr
Figure 10: Range and lux potentiometers
Dusk Adjustment
Adjust the lux level for the day-night setting using the lux PCB mounted pot.
The S output is factory set to start operating at dusk. That is, when the light level falls
below 5 lux. If the ambient night-time light levels are higher than 5 lux then the S output
will remain inactive and your lights will not turn on.
If the light level in your installation is above 5 lux at night (lights do not operate),
increase the light level at which the S output starts to operate, by turning the lux pot
clockwise towards 24HR.
To set the S output to detect continuously, day or night, independent of light level,
turn the lux pot all the way to maximum, marked 24HR.
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Specifications
Coverage (max) 90° at 30m, equivalent to 625m2
Reach Adjustable 9m to 30m
Directional adjustment ±90° horizontal (180°), ±45° vertical (90°)
Area adjustment (blanking)
Supplied with, 1 foil label for near/far beam blanking
and 4 vertical opaque curtains for zone blanking
Lens 2 rows of 10 beams
Sensor White light filter prevents false triggering when sunny
Output A (Alarm)
Open-collector transistor switch. 12V, 25mA alarm
current
Output S (Sensor, daylight)
Open-collector transistor switch. 12V, 25mA alarm
current
Output T (Tamper) Volts-free, normally-open switch output
Tamper switches Case open and removal from wall
Power 9 to 15V DC
Current 4mA at 12V
Operating Temperature -20°C to +55°C
Protection
IP55, high-impact ABS housing. Conformal coated
electronics (moisture and UV protection lacquer)
Dimensions 84 x 106 x 72 mm
Mounting Suggested height 3m
Cabling 0 to 200m: standard, 4-core, 7/0.2mm alarm cable
200 to 500m: 8-core, 16/0.2mm (use double cores)
Approvals
The manufacturer declares that the product supplied is compliant with the provisions of
the EMC Directive 89/336/EEC amended 92/31/EEC for Electromagnetic Compatibility,
and the Restriction of Hazardous Substances Directive (RoHS) 2002/95/EC. A
Declaration of Conformity in accordance with the above directives is held on file with
the manufacturer.
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Copyright Notice
GJD Manufacturing Limited
Sales: +44 (0) 1706 363998
Technical: +44 (0) 1706 363990
Fax: +44 (0) 1706 363991
E-Mail: info@gjd.co.uk
Web: http://www.gjd.co.uk
GJD Reserve the right to amend specifications without notice.
Copyright © 2007 GJD Limited.
Mini Opal booklet Issue 1 0707
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