750WP & 751 Series

Your comprehensive guideto installing Clipsal Infrascans

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Products of Gerard Industries Pty LtdABN 27 007 873 529

Head Office12 Park Terrace, BowdenSouth Australia 5007Telephone (08) 8269 0511Facsimile (08) 8340 1724Internet clipsal.comE-Mail plugin@clipsal.com.au

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O/N 850-462 OCT 01/02

©Copyright Gerard Industries Pty LtdPrinted by Custom Press Pty Ltd (08) 8346 7999

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Contents

2 Introduction

3 Product selection

4 Optical system

5 Sensor features

6 Detection circuitry

7 Light level threshold

8 Load control

10 Detector mounting

11 Step by step instructions to

installing a Clipsal Infrascan

14 Typical installations

19 Multiple Infrascans

20 Possible problems

24 Load recommendations

28 Technical data

Your CompleteInstallation Guide

2

Clipsal Infrascans are motion sensors that provide automatic light swit-

ching for convenience and security.

Another important benefit of Infrascans is the significant energy savings

they offer by automatically switching the load off when no one is occupying

the detection area.

Clipsal Infrascans use passive infrared (PIR) detectors to pick up body

movement to turn on lighting for a preset period. They do this by sensing

the infrared (IR) energy that is naturally radiated by any object.

Clipsal Infrascans detect the band of IR light that is produced by objects

that are about skin temperature (approx. 30oC) passing through the

detection zones.

Infrascans can be adjusted to turn a load on at preset light levels, from

complete darkness to full sunlight. Therefore lights are only turned on

when needed.

The name “Infrascan” was coined

by Clipsal and is now synonymous

with infrared motion detectors.

Clipsal Infrascans are totally

Australian designed and manufa-

ctured under the strict guidelines of

a Quality System, accredited to

AS3902.

The quality and reliability of the

Clipsal product have made the

Infrascan, number one in Australia.

This guide concisely explains the

technology behind Infrascans and

the best position to install these

devices to achieve optimum detection

and reliability.

It also answers the questions most

commonly asked by the Electrical

Contractor.

QualityEndorsedCompany

Qual

ity S

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Introduction

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750WP Series Outdoor Infrascans

Product Selection

751 Series Indoor Infrascans

The 750WP Series Infrascans are

weatherprotected devices that carry

an IP66 International Protection

Rating.

Their environmental ruggedness,

superior detection capability and

adjustable light sensitivity and delay

periods make them ideal for outdoor

use.

The 751 Series Infrascans provide

an efficient and attractive means of

controlling indoor lighting.

They provide optimum detection

performance when mounted at the

normal ceiling height of 2.4 metres.

Cat. No. Description

750WP 5A, two wire connection

750WPR 10A, three wire connection

5750WP C-Bus connection

Cat. No. Description

751 2A, two wire connection

751R 10A, three wire connection

5751 C-Bus connection

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Optical System

750WP Series

Clipsal 750WP Series Infrascans

feature a multi-segmented Fresnel

lens with 48 detection zones.

The lens provides optical gain for

achieving excellent long range

performance.

Sensor Features

Clipsal Infrascans incorporate the

following features as standard.

An electrostatic and electro-

magnetic shield around the

sensor elements that reduces

false tripping from radio

frequency interference (RFI).

High performance pyroelectric

ceramic sensors with excellent

signal to noise ratio (751 Series

only).

An optical bandpass filter that

minimises unwanted light and

heat sources triggering the

circuitry.

Dual element detectors that

minimise false tripping due to

rapid environmental tempera-

ture changes.

1

2

3

4

Detection zones are located on four

levels. These provide superior close

range detection coverage and a relati-

vely high level of sensitivity to move-

ment directly towards or away from

the Infrascan.

2.4m

5°TILT

OPTIMUM "APPROACH PATH"

OPTIMUM "APPROACH PATH"

1.2m 4m 8m 18m

110°@ 15m

Multi-Segmented Fresnel Lens

751 Series

Clipsal 751 Series Infrascans feature

a lensless design with 12 overlapping

zones forming a continuous detection

field.

This means that uniform sensitivity

is achieved across the whole of the

detection field, with no dead zones

(areas that the Infrascan is insensitive

to movement). This feature allows

wall or ceiling mounting of the 751

series.

Lensless Design

Detection Profile 751 Series

2.4mSCANNED AREA VERTICAL PLANE

90 VIEWING ANGLEO

90O

FLOOR

8.5mAPPROX.

SCANNED AREA - HORIZONTAL PLANE

DETECTIONAREA 6 x 6 METRE

Detection Profile 750WP Series

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750WP SeriesExploded view

Dual Element Detector

Fresnel Lens

Front Cover Main Body Mounting Base GasketKnuckleAssembly

Flexible Cable20mm ScrewEntry Plugs (3)

750WPR

751 SeriesExploded view

Cover Assemby Sensor Electronics Mounting Flange

Base

751R

6

Features

Detection Circuitry

The printed circuit board (PCB) of

Clipsal Infrascans features extensive

electrostatic shielding around the

extremely sensitive low level detector

signals.

In addition, the interconnections

between components have been

kept to an absolute minimum to

minimise the amount of RFI pick-up.

Extensive use of surface mount

components also helps to reduce

RFI pick-up.

The detector circuitry will only

respond to relatively long duration

signals, thus ignoring short term

(even large amplitude) influences,

such as large transients on the

mains supply that could be picked

up by the detector circuitry.

These features make the unit very

reliable in operation and minimise

false triggering.

The 750WP Series also features a

sensitivity adjustment that effectively

enables the radius of the field of

detection to be reduced from the

maximum range of 18 metres down

to only several metres, depending

on conditions.

This adjustment can be used to

limit the detection range of the

Infrascan or reduce the sensitivity

to nuisance tripping caused by small

pets, tree branches moving in the

wind, etc. Detection Pattern 750WP Devices

Detection Pattern 751 Devices

8.5m

2.4m

18m

18m

Sensitivity Adjustment750WP Devices

5o

2.4m

5o

90o

6m

8.5m

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100%

100%

θθθθθ

NON-LINEAR LINEAR ADJUSTMENT

Timer Period

The Infrascan timer is variable from

several seconds to several hours

(C-Bus Infrascans only).

The timer is restarted with subse-

quent movement. i.e. The load will

remain on for as long as there is

movement in the detection field.

The load is turned off when move-

ment has stopped and the time delay

has expired.

The timer adjustment is slightly non-

linear, for ease of adjustment of low

to intermediate timeout periods (not

applicable to C-Bus Infrascans).

Timer Adjustment 751 Series

Timer Adjustment 750WP Series

TIMEOUTPERIOD

0%

Light Level Threshold

The light level circuit in Clipsal

Infrascans provides an adjustable

light level threshold, below which

the load will be activated by body

movement. This feature prevents

lights turning on during daylight

hours.

The range of adjustment is from

below 1 Lux (extremely dark) to full

sunlight. The light level adjustment

is proportional to the perceived light

level. The light level circuit is deacti-

vated when the load is turned on so

that the Infrascan will continue to

detect body movement even if the

light level is above the light level

threshold.

The fully anticlockwise position of

the adjustment provides operation

Light Level Adjustment 750WP Series Light Level Adjustment 751 Series

at any ambient light level. A normal

‘evening operation only’ setting, of

the adjustment, is about mid position.

ANGLE OF ROTATION OFTIMER ADJUSTMENT

8

Load Control

There are three methods of load

control available in the Clipsal

Infrascan range.

Load control is provided by our

patented circuit that utilises a triac

device. No neutral connection is

required as the electronics are

powered by a small leakage current

that passes through the load in the

'off' state or by the small voltage drop

across the control circuit in the 'on'

state.

This circuit also features silent

switching operation, very low RFI

transmissions and operation with

almost any load type (gas discharge

lamps must have power factor corre-

ction capacitors fitted).

The circuitry is rated to withstand

most fault current conditions such

as lamps blowing, etc., when prote-

cted by a 10A HRC type fuse or

10A circuit breaker.

The load current capabilities are 2A

for the 751 and 5A for the 750WP.

Operation of two wire devices in

parallel controlling a common load

is not directly possible.

1 2Two Wire Control Three Wire ControlLoad control is provided by a special

dual contact relay designed for extre-

mely long life with lighting loads, even

10A of power factor corrected fluo-

rescent lamps.

One of the contacts is a tungsten

pre-run contact (contacts before

the main silver alloy contact). This

extremely hard wearing contact

carries the high inrush currents of

incandescent lamps and power factor

corrected loads by a capacitor and

resists wear and welding.

They also carry the arc when opening

with an inductive load and are highly

resistant to burning.

Several relay Infrascans can be

simply connected to a common load

for covering larger areas or for increa-

sed sensitivity over a common area.

ELECTRONICS

TRIAC

LOAD

N

(10A PROTECTED)A

IR ENERGY

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Load control is via the normal C-Bus

communication for use with any of

the output or load control devices

such as the Four Channel Relay unit.

C-Bus Infrascans (5751, 5750WP)

are intended for use exclusively

with the C-Bus system. They comp-

rise a micro-processor, embedded

software and static memory to hold

operating variables and parameters

and are programmed by the C-Bus

Installation Software.

These units are mechanically and

optically equivalent to the units in

their series. The optical performance

of the units is also the same. The

load switching is via C-Bus output

units. C-Bus Infrascans do not need

connection to the mains supply.

The delay period and sensitivity are

programmed from the software, while

the light level threshold is set from

the unit, as with other Infrascans.

The installation of these units follow

similar procedures and guidelines as

standard mains operated Infrascans.

3 C-Bus Control

RELAY

ELECTRONICS LOADIR ENERGY

(10A PROTECTED)A

N

Multiple Infrascans (three wire type)

controlling a common load.

NE

UTR

AL

NE

UTR

AL

LOA

DLI

NE

LIN

ELO

AD

LOAD

A

N

5751

5104R

C-BUS

A

N

10

120OVIEW

LIGHT LEVELADJUSTMENT

"TIME ON"ADJUSTMENT

120 HEAD ROTATIONo

Detector Mounting

751 Series

This series is suitable for ceiling or

wall mounting. Because of the form

of the detection field, only a simple

rotation about the vertical axis is

required to aim the Infrascan in the

desired direction.

A mounting base, (Cat No. 751MB)

can be used when mounting 751

Series Infrascans onto solid surfaces

- using mini trunking to rearticulate

wiring.

751MB Mounting Base

When 751 Series Infrascans need to be mounted

on concrete structures such as ceilings or pillars,

the 751MB mounting base may be used.

The 751MB accommodates mini trunking up to

16 x 10mm, providing neat, convenient mounting.

Step 1

Fix mounting flange to ceilingor wall.

Step 2

Pull fixed wiring throughmounting flange and attachto mounting flange.

Step 3

Attach sensor head with asingle screw and fit number9 cap.

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750WP Series

These Infrascans are suitable for

ceiling or wall mount applications.

They also have limited use on

surfaces that are neither vertical

nor horizontal depending on the

slope angle of the surface and the

direction of the slope with respect

to the desired detection area.

The adjustment on the 750WP

Series is made by the dual ball

joints on the arm between the

sensor head and the mounting

base.

Step 1Site Selection

Many of the problems associated

with any PIR detector are due to

poor site selection. Because the IR

light is invisible and the nature of

the light being emitted, reflected

and absorbed by surfaces is gene-

rally unknown, it is easy to see why

problems occur.

With some understanding of how

PIR sensors operate, the appropriate

positioning of Infrascans can be

easily chosen.

Any PIR detection device must be

positioned so that the normal direc-

tion of movement of people generally

‘cuts across’ the detection zones.

This produces the most rapid

changes in the IR signal to which

the sensor is most sensitive to.

Movement directly towards or away

from the sensor produces the least

rapid changes in IR signal to which

the sensor is particularly insensitive

to (see note 1).

The detection zones of any PIR

detector appear as a number of

narrow sectors which share a com-

mon apex at the sensor.

Most easily detecteddirection of movement

Most difficult to detectmovement in this direction

Note 1 PIR detection devices aredesigned not to respond to slowchanging IR signal. This providesimmunity to false triggering due tothe temperature changes in thedetection area (e.g. surfaces beingwarmed by the sun coming outfrom behind a cloud, or cooled byrain or wind, etc.).

Step by Step Instructions toInstalling a Clipsal Infrascan

Position such that entry into the dete-ction area and general movement areacross the detection area, not directlytowards or away from the Infrascan.

The mounting plate supplied with

750WP products suits standard

84mm mounting centre accessories

20mm diameter screw entries and

282/20 glands enable PAR 38

floodlamps to be fitted to these

Infrascans.

12

Step 2General Assembly

Pass the flexible lead of the Infra-

scan through the cable gland and

assemble onto the mounting base.

Allow enough length of cable between

the mounting base and the detector

head for adjustment, then tighten

the gland. Fit the two threaded plugs

into the remaining apertures in the

mounting base. Fit the gasket to the

mounting base.

Gasket

Fit mounting base to surface to ensure adequate waterproofing

Waterproofing of the cableconnections is mandatory andis the responsibility of theinstaller. The entire electronicsenclosure is fully sealed at thetime of manufacture. A smallamount of silastic may also beused for weatherproofing.

Step 4Fitting the Infrascsan

Fit the Infrascan mounting base to

the chosen site with suitable

fasteners.

For the 750WP Series Infrascans,

fit the caps into the screw recesses,

ensuring that there is adequate

weather protection of the termina-

tions inside the mounting base.

Next, tighten both ball joint clamps

sufficiently to hold the detector

head in the appropriate position.

Step 3Wiring

Pass the wiring through a hole in

the wall or eave, (where the moun-

ting base is fitted) and terminate to

the end of the flexible lead of the

750WP Series Infrascan.

Step by Step Instructions toInstalling a Clipsal Infrascan

Pass lead through glandand fit to mounting base

Allow enough length

Fit 20mm diameterplugs to spare entries

General Assembly 751 Series

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Step 5Set-up for Walk Test

Walk around the desired detection

area to determine if the detector

head is positioned correctly.

Stop all movement within the

detection area once the Infrascan

has been triggered and wait for the

load to turn off before resuming the

walk test again.

The detector head of the 750WP

Series Infrascans should only be

tilted down between 0 and 5 degrees

for optimum detection range.

The detection range can be reduced

if desired by tilting the detector head

downward and/or by turning the

sensitivity adjustment anti-clockwise.

LIGHT LEVEL SENSITIVITYTIMER

Step 6Set Adjustments

Check that the Infrascan operates

correctly by simulating darkness by

covering the lens with a hand. Take

care that the light adjustment is not

set to a darker level than what can

be achieved.

Check that the timeout period is

adequate by timing the interval

between the last movement in the

detection area to when the load

turns off. If required, make further

adjustments to suit and retest.

Once job is completed leave the installation instructions and warrantyconditions, with the adjustment tool, at the installation site.

LIGHT LEVEL SENSITIVITYTIMER

~

(~2 MIN)

Adjust the time delay from 5 seconds to 8 minutes (2 minutes illustrated), light sensitivityto enable Infrascan to operate at desired light conditions ( sunset illustrated ) and detection

range from several metres to maximum range (maximum range illustrated).

During the walk test set the time delay to the minimum period, light sensitivityfully opened and sensitivity at maximum detection as illustrated.

(LIGHT AND DARK)(DARK ONLY)

(LIGHT AND DARK)(DARK ONLY)

14

TypicalInstallations

751 Series

A typical installation for a single

indoor Infrascan is in a square or

rectangular room up to 6m by 6m.

The Infrascan should be fitted near

the wall that contains the main

entrance doorway, at the corner

away from the doorway.

VIEW

For square and near square rooms,

the Infrascan can simply be angled

at 45o from each of the walls at the

corner of the room. If there are two

entrance doorways on adjacent

walls, the Infrascan can be fitted at

the corner of those two walls.

If the entrance doorways are on

opposite sides of the room, install

the Infrascan opposite the wall

containing the doorway that can

tolerate detection past the doorway.

The Infrascan must be fitted rigidly

and tightly against a fixed mounting

surface. This is to prevent false trig-

gering from draughts and movement

of the Infrascan due to changes in air

pressure.

VIEW

VIEW

Light Traffic Area

Heavy Traffic Area

Position Infrascan on same wallas entrance doorway.

Fit Infrascan in corner betweenadjacent entrance doorways

Position Infrascan to minimisedetection from heavy traffic incorridor

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ab

c

750WP SeriesFixing Location

A typical installation for a single

750WP Series Infrascan is outdoors,

covering a verandah, porch, pathway,

patio, driveway, etc. up to about

15m by 15m. If possible, choose a

position that is partially protected

from the sun and rain.

Even though the Infrascan is desig-

ned for long life with outdoor use,

the finish on the plastic components

will last even longer if protected

from the sun’s UV rays.

Providing partial cover from the rain

will ensure maximum sensitivity by

minimising the amount of rain droplets

that adhere to the detector window

(water will block out IR light).

If full coverage is required over the

rectangular or square area, the

Infrascan must be installed near

the corner of that area. The Infra-

scan position must be such that

most movement is across the front

of the Infrascan (tangential direction),

with minimal movement towards or

away from the Infrascan.

The detector head of the Infrascan

must be tilted down only slightly (5o

from vertical) for optimum range.

The detector head can be tilted

down further as a method of reducing

the detection range eg. to avoid

detection of distant pedestrians or

moving vehicles. The aspect of the

detector head (when viewed from

directly in front) must be kept vertical.

Position Infrascan at A or B but do not position at C

ac b

5O

Usual direction of movementthrough detection field

Tilt Infrascanfrom 0o to 5o

degrees foroptimum range.

16

Common Problems

One of the most common problems

is lack of sensitivity due to poor

positioning of the Infrascan.

The most common examples are

positioning an Infrascan outside,

above a main entrance door and

indoors at the end of a corridor.

The outdoor Infrascan solution is

relatively easy. The Infrascan would

be more appropriately positioned

on either side of the usual direction

of movement, as suggested by

positions A or B (as per previous

page)

The solution to adequate detection

for the indoor Infrascan is made

with consideration to the direction

of movement and entry points into

the corridor.

The Infrascan will always perform

better if it is positioned to one side

of the corridor as movement along

the length of the corridor will cross

the detection zones. If positioned

next to an end door, site the Infra-

scan on the door hinge side of the

corridor.

Consideration must be made (as

usual) that the Infrascan can not

view into adjacent rooms as move-

ment could be detected.

If the corridor is longer than 6 metres,

an additional Infrascan may be re-

quired at the other end or possibly

midway depending on the situation.

Obstructions

Choose a site that has no visual

obstructions between the Infrascan

and the desired detection area.

This includes gutters, facia boards,

down pipes, light fittings, trusses,

arches, doorways, cupboards,

plants, creepers, overhead cables,

glass windows, etc.

Mounting Height

Clipsal Infrascans have been desi-

gned for mounting onto a horizontal

or vertical surface at a height of

2.4m above the ground. If the ground

level is sloping, the 750WP Series

can be tilted to suit the slope of the

ground.

Mounting the Infrascan lower than

the recommended height will result

in reduced detection performance

with a noticeable reduction in the

sensitivity to movement directly

towards, or away from, the Infrascan.

Mounting the Infrascan higher than

the recommended height may result

in some improvements to aspects

of the detection capabilities, such

as increased range and sensitivity

to movement directly towards, or

away from, the Infrascan.

However, a reduction in sensitivity

in the detection area within several

metres of the Infrascan can result.

If mounting a 751 Series Infrascan

to a cathedral style (sloped) ceiling,

a spacer block may have to be

fabricated to achieve a horizontal

mounting surface. However, depen-

ding on the application, the range

detection performance of the 751

Series can actually be improved by

tilting it up to about 15o as shown

below (this will slightly compromise

close range performance).

Note that the bars in the detector

window, when viewed from directly

in front, must be vertical in all

installations.

Reduced closerange detection

Spacer block

751 Series installationon sloped ceiling

TypicalInstallations

Avoid mounting the detector nearobstructions such as downpipes

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Reflectionand Transmission

IR light will reflect off all smooth

surfaces such as metal, paint,

varnish, glass, plastic, ceramic,

water and enamel finishes,

especially at acute angles.

These reflections may cause a

problem where the movement in

another room could cause the Infra-

scan to trigger. Even if there is no

direct line between the body move-

ment and the Infrascan, sufficient

IR energy can be reflected.

Note: There are very few materials

that IR light can actually pass

through. Even these materials have

to be quite thin to allow most of the

light through.

Power Up Sequence

When powering up an Infrascan for

the first time, it is normal for the

circuit to trigger the timer as the

detector circuitry stabilises.

Depending on the sensitivity setting

(750WP Series only) the settling

time may be several seconds to

around one minute (depending on

the model of Infrascan) plus the set

timeout period.

After this settling period, the Infrascan

is ready for operation. The load

usually comes on during this settling

period.

Glass and clear plastic, such as

PVC or polycarbonate, appear

totally opaque at these frequencies

and therefore do not allow this light

through at all.

It is also important to remember that

any netting or mesh will appear

partially transparent.

Consideration must be made to posi-

tioning an Infrascan when windows

and doors with mesh or wire screens

are used. These will be transparent

and could lead to false triggering of

the Infrascan, from the movement

on the other side of the mesh.

Power offTurn

power on

Settling period Normal operation

Light goes offfollowing settling

period

Approx. 1 minutueplus time delay

set on unit

Movement can be detectedthrough a wire mesh door.

Mirrors reflect IR light.

18

ElectricalWhen fitting a Clipsal Infrascan or

any other electronic accessory,

some precautions must be made

with the physical layout of the wiring

of the installation.

Because of the nature of the control

circuit, the current consumed by

the electronic circuitry is not a pure

sinusoidal current but consists of a

small amount of discontinuity (or

distortion).

This produces some very low level

harmonic (higher frequency) currents

that can extend up to about the AM

broadcast band. These harmonic cur-

rents do not produce any problems at

all with conventional wiring and when

all the connections are available.

However, problems may arise with

interference on weak AM band

radio station reception if a loop ante-

nna is formed by the mains wiring.

This can occur, for example, if there

is no neutral available at the point

of installation (ie. at, or near a switch)

when fitting a three wire product,

and a conductor run is made from

another location for the neutral.

If this wire is not run next to the

other current carrying conductors,

the loop that the current flows around

consists of a much larger area when

compared to using existing cable

with all the necessary conductors.

This forms a loop antenna which

improves the coupling of the un-

wanted harmonic components to

the radio receiver.

TypicalInstallations

HOUSE

FUSEBOX

A N

SMALL LOOP AREAINCOMINGMAINS

A N

N

L

A

N

A

HOUSE

FUSEBOX

A N

LARGE LOOP AREAINCOMINGMAINS

A N

N

L

A

N

A

TO OTHERDEVICES

Optimum Cable Layout Infrascan (R Version)

Non-Optimum Cable Layout Infrascan (R Version)

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MultipleInfrascans

Implementation

The easiest way to connect more

than one Infrascan to a common

load is by using the 3 wire, relay

version (751R indoor/750WPR out-

door) and simply connecting all the

load terminals together to the load

circuit.

The C-Bus Infrascans can naturally

be configured to control a common

load circuit or almost any combina-

tion of circuits for each Infrascan if

desired.

It is possible for a two-wire Infrascan

to be connected to a common load

with other Infrascans but only with

the use of a contactor for each of

the two wire circuit Infrascans used.

When the 2 wire Infrascan switches

the solenoid of the contactor is ener-

gised closing the contact and enabling

power to the lighting circuit.

The use of more than one Infrascan

on the one lighting load circuit can

be for any of the following reasons

For covering a much larger area

than a single Infrascan can cover.

For covering adjacent areas

that are divided (eg. separated

by a corner of a building, trees,

trellis or different levels).

For increased detection capability

of the one area (eg. where excel-

lent sensitivity is required to all

directions of movement).LAMP

N

A

TWO WIREINFRASCAN

CONTACTOR

In this case it is preferable to create

additional load circuits (particularly

for applications in point 2 ). This will

result in easier setup and fault finding

of the installation and minimises any

nuisance with false triggering.

Recommendation

The recommendation is to use one

Infrascan wherever possible.

However, where more than one

Infrascan must control a common

load circuit, the recommendation is

to keep the number of Infrascans to

an absolute minimum, particularly if

the light level adjustment feature is

used (see possible problems overleaf).

Using 2 wire devices and contactors to control a common load

REPEAT FORADDITIONALTWO-WIREINFRASCANS

10A FUSE or MCB

1

2

3

20

Possible Problems

Multiple Infrascans

Because of the possibility of any of

the Infrascans being triggered by

movement, it is difficult to set up a

multiple Infrascan installation.

This is because of the uncertainty

of which of the Infrascans is

actually controlling the load.

It is suggested that each Infrascan

is set up and/or tested individually.

All other Infrascans connected to

the common load circuit should be

disabled by either completely

blocking the detector window (and

allowed to time out) or by being

temporarily disconnected from the

supply or the load circuit. This will

result in far less confusion than any

other method.

The sensitivity of the PIR detector

depends on the following:

The change in the amount of IR

light received determined by

The difference in temperature

between the background and

the moving body.

The surface area of the moving

body facing the detector.

The distance between the moving

body and the detector.

The ability of the background

and moving body surfaces to

emit IR light (emissivity). Skin,

clothes, water, concrete, soil,

sand, paint and wood have

particularly high values of emis-

sivity, while polished metals

have particularly low values of

emissivity.

The rate at which the amount of IR

light received changes is basically

determined by the speed that the

moving body can move into or out

of the detection zone.

PIR detectors will show the highest

sensitivity to larger objects that are

much warmer or cooler than the

background, have higher or lower

emissivity, and are relatively fast

moving. Conversely, there will always

be poor sensitivity to smaller objects

that are about the same temperature

as the background, having about the

same value of emissivity and are

relatively slow moving.

Because of these parameters, poor

sensitivity, for example, may be noti-

ced after a downpour of rain where

all surfaces have been brought to

the same temperature and have the

same value of emissivity (that of

water), or on a particularly hot day

when the temperature of the back-

ground is very close to the tem-

perature of the moving body.

However, high sensitivity, for example,

may be noticed with large distant

moving bodies such as livestock

and vehicles because of the large

surface area and/or speed of move-

ment.

The sensitivity of the 751 Series

cannot be adjusted except by chan-

ging the distance between the

Infrascan and the moving body (eg.

positioning the Infrascan closer to

the movement will result in higher

sensitivity to that movement).

The 750WP Series Infrascans have

a sensitivity adjustment enabling a

reduction in range and reduction in

sensitivity to movement close to the

detector so as to reduce nuisance

triggering such as plants moving in

the wind or pets, crossing the

detection zones.

When multiple Infrascans control thesame load, test each one individuallyby disconnecting or blocking out allothers.

Reduction In Sensitivity

Insta

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Gu

ide

21

As the lamp load is turned on by

the second Infrascan, the resulting

increase in the ambient light levels

can then cause the first Infrascan

to be disabled.

The remedy is difficult as the Infra-

scan must be positioned so that it

receives none or little of the light

from the lamp load that it controls.

This is in direct conflict with the

purpose of the Infrascan (ie. auto-

matic illumination of the detection

area).

To help overcome this problem, set

the light level threshold on all

Infrascans to quite a high light level

(above which the lamp load could

achieve at night).

This problem will then only occur

near that threshold (as the lighting

load will have little influence over

high natural light levels) and will

then only occur for a relatively short

period of the day. Additionally, the

Infrascans should be positioned so

that direct light from the lamp load

does not fall on the sensor window.

A complete solution to the problem

is to set all Infrascans to operate

at all light levels and then use a

separate sunset switch to control

a contactor. This contactor can be

used to isolate the lamp load from

the Infrascans when the natural

light levels are sufficient.

The sunset switch can then be

positioned well away from the areas

that are illuminated by the lamp load,

monitoring the natural light levels

only.

N

A

Infrascans(R Versions)

Light Level Threshold

Peculiar behaviour can be observed

with a common lighting load conne-

cted to several Infrascans.

Illumination from the lamp load can

disable the Infrascans that are not

triggered because of the artificial

increase in the ambient light levels

(above the preset light level of each

Infrascan).

For example, if a person moves out

of the detection area of one Infrascan

to the detection area of a second

Infrascan where both areas are

illuminated by the one common

lighting load, the second Infrascan

may be disabled because of the

increase in the ambient light level.

This will allow the timer of the first

Infrascan to timeout, therefore

turning the lamps off, even if there

is movement in front of the second

Infrascan. Because the lamp load

had been turned off, this then lowers

the ambient light level below the

threshold set by the second unit,

thus now enabling it to respond to

any possible movement.

If there is movement in the second

area at the time the first Infrascan

times out, the lamp load will only

stay off for less than one second as

the second Infrascan is enabled to

detect the movement. It is important

to note that the lamp load will remain

off if there is no movement at that

moment, even if there was move-

ment in the second detection area

just moments prior to the lamp load

turning off.

Light Level Threshold With Multiple Infrascans

Load

Contactor

SunsetSwitch

22

False Triggering

The following problems may cause false triggering of an Infrascan

Possible Problems

Like all other PIR devices, in addi-

tion to detecting humans, Infrascans

can detect other moving heat sources

(or moving objects that cause other

heat sources to be obscured).

The following examples are the most

common sources of false triggering:

Wind

Air-conditioning vents

Heater flues

Washing on a clothes line

Moving tree branches

Unwanted pedestrian or

vehicular traffic

Pets/Livestock

Very small animals (at very

short distances)

Running water

1 2

Movement of the detector head which

can be caused by:

An incorrectly fitted mounting

base

Extreme windy conditions

Insufficiently tightened ball joints

Insufficient rigidity in the surface

on which the Infrascan is mounted

Large amplitude vibrations

Swaying tree branches touching

the detector or moving the

surface that the Infrascan is

mounted to.

Reflections off water or any

smooth surface

Extreme close proximity to the

lighting load.

Fault Finding Checklist

Check for an ‘override on’ switchin the ‘on’ position.

Check that the timer adjustmenthas not been set for a longerperiod than expected.

Check that there are no plants orbranches moving in the wind oranimals within the detection area.

Check that the Infrascan ismounted firmly.

Check that the installation iscorrectly wired.

Check for an ‘override off’switch in the ‘off’ position.

Check that the light leveladjustment is not set darkerthan what can be achieved.

Check that the lamp has notblown.

Check that the circuit breakeror RCD has not tripped.

Load stays on or comes on for no apparent reason: Load stays off:

It’s important to remember that some of

these IR sources can be detected at quite

a large distance from the Infrascan depen-

ding on the amount of IR light radiated.

Insta

llati

on

Gu

ide

23

the capacitor and the Infrascan

terminals to a minimum.

Y class capacitors should only be

used in this application:

3

The least likely cause is extreme

electrical interference (RFI) that

can be conducted down the mains

supply cable. This can be caused

by fluorescent lamps or motors

starting, faulty insulation or RF

transmitters.

Clipsal Infrascans have been desi-

gned to suppress most RFI induced

signals and incorporate a special

circuit that rejects unwanted signals.

In the rare event that the false trig-

gers are due to RFI, suppression

capacitors can be connected to

improve this problem.

This is done by connecting one Y

class 250V a.c. min. rated capacitor

(from 100pF to 10nF) directly across

the active and neutral connections

at each Infrascan, keeping the

length of the conductor between

ACTIVE

LOAD

Check that there is poweravailable at the Infrascan.

Check that the sensitivityadjustment is not set too low.

Check that the installation iscorrectly wired (broken conne-ction or wire).

Check that the detector windowis not obscured.

Check that the lamp load is nottoo close to the detection window.

Check that the power factorcorrection capacitors are fittedto gas discharge lamps (eg.fluorescent lamps).

Check that there are no plantsor branches moving in the windor animals within the detectionarea.

Check that the installation iscorrectly wired and that theinsulation hasn’t broken down.

Check that the load has notbeen connected directly to atwo wire circuit in a multipleInfrascan installation.

Load turns on, off, on and off, etc:

NEUTRAL(Three Wire)LOOP(Two Wire)

The Infrascan must be mounted to a rigid

surface with all the mechanical adjustments

tightened to minimise movement.

LOAD

A

N

Y-CLASSCAPACITOR INFRASCAN

24

LoadRecommendations

Two Wire CircuitLoads

The two wire circuit will control a

large variety of loads including highly

inductive or capacitive loads up to

the maximum current rating of the

product. The electronic switching

device used (triac), is an extremely

rugged type that can withstand the

high inrush currents of capacitive

loads.

For some loads, special considera-

tions must be made for the correct

operation of the two wire circuit.

The two wire circuit operates with

the small leakage current that is

passed through the load in the off

state. In the on state, it operates

from the low level voltage that is

dropped across the switching devices.

For these reasons, very small loads

may have a significant voltage drop

across them, in the off state, because

of the leakage current. This may

cause a lamp load to partially illu-

minate (particularly if a gas discharge

type, eg. neon or mercury vapour)

or the armature of a small relay

load to vibrate.

The minimum load current has

been set at about ten times the

maximum two wire circuit leakage

current to minimise these effects.

Fluorescent lamps will require

power factor correction capacitors

to be fitted to provide a current

path for the two wire circuit in the

off state. Some difficulty may be

experienced with correct operation

of a two wire circuit when using

small PL type lamp loads,

particularly the very low power and

electronic variety.

These types of lamps do not normally

have a provision for power factor

correction capacitors, so a capa-

citor may have to be fitted to the

lamp fitting, or alternatively, a resis-

tive load (eg. tungsten lamp) can

be connected in parallel with the PL

lamp(s).

750WP / 751

A

N

MULTIPLE 750WPR/751R INFRASCAN POSSIBLE ON ONE LOAD CIRCUIT

Brown10A Fuse or MCB

750WPR / 751R

A

N

Brown

White

10A Fuse or MCB

ONE 750WP/751 INFRASCAN PER LOAD CIRCUIT

White

Blue

Three Wire Circuit

The relay fitted to the Clipsal

Infrascans and C-Bus relay units

can be used with any type of load

up to the maximum continuous

current rating of the product.

It is especially suited for long life

use with loads that have high inrush

currents (power factor correction

capacitors fitted or tungsten fila-

ments). It is also suitable for use

with highly inductive loads where

there is a large amount of back

EMF produced when turning off.

Insta

llati

on

Gu

ide

25

Using a Contactor

Should a large load circuit (greater

than the rating of the Infrascan) be

required, a suitably rated contactor

may be used to switch the load

current while the Infrascan controls

the contactor solenoid current.

Remote Trigger of a Timer

•30MBP• A

N•

• • A

N

30MBP

Note: This feature canbe used with a pressbutton switch (30MBP)at a remote location toinitiate the timer.

THREE WIRE INFRASCAN

TWO WIRE INFRASCAN

Using a Contactor

•

• A

N

INFRASCAN

CONTACTOR

LOAD GREATER THANINFRASCAN RATING

LOAD UP TOINFRASCANRATING

(NOTE: MAXIMUM 1 INFRASCAN PER CONTACTOR)

TWO WIRE INFRASCAN

• A

N

INFRASCAN

CONTACTOR

LOAD GREATER THANINFRASCAN RATING

LOAD UP TOINFRASCANRATING

THREE WIRE INFRASCAN

•

•

••

•

Remote Trigger

A normally closed push button

switch may be used to remotely

initiate the Infrascan timer.

•

•

(NOTE: MAXIMUM 1 INFRASCAN PER CONTACTOR)

26

LoadRecommendations

Override Facilities

Some installations may require an

override on and/or an override off

facility. These facilities allow the user

to select an appropriate mode of

operation to enable the load to be

turned on or off.

It is essential that any override

switch or switches are appropriately

labelled, as it is otherwise difficult to

determine the setting of the switches

(eg. for an override switch, the load

can be in the same state in both

positions). Also, because of the un-

certainty of the state of the override

switch, two way (or multiway) over-

ride switching is not recommended.

Note: The use of an override on or

override off switch with a two wire

Infrascan (or, incorrectly, on the

active line of a relay Infrascan) will

result in the normal power up

sequence whenever operation is

returned to the automatic mode (ie.

the load will turn on for the settling

time plus the set timeout period).

Two Wire Infrascans

N

A10A Fuse or MCB

Active

Load

Auto Only

N

A10A Fuse or MCB

Active

Load

On Auto

30MAM

N

A10A Fuse or MCB

Load

Off

Auto

Active

Override Off

Override On

N

A10A Fuse or MCB

Active

Load

Override On and Off Off

AutoOn Auto

2 x 30M or 30MAM

N

Active

Load

Override On and Off (with 39MAOM)

39MAOM

A

10A Fuse or MCB

OffAuto

On

Insta

llati

on

Gu

ide

27

Three Wire Infrascans

N

Active

Neutral

Auto Only

Override Off

Override On

Override On and Off

Override On and Off (with 39MAOM)

A

10A Fuse or MCB

Load

N

Active

Neutral

A

10A Fuse or MCB

LoadAutoOn

30MAM

N

Active

Neutral

A

10A Fuse or MCB

LoadAuto

Off

N

Active

Neutral

A

10A Fuse or MCB

LoadAuto

OffAutoOn

2 x 30M or 30MAM

NNeutral

A

10A Fuse or MCB

Load

Active

On

AutoOff

Switch mechanisms, that are suitably

labelled, are available from Clipsal

and include the following:

Cat.No. Description

30MAM Manual / Auto, 10A,

curved rocker

39MAOM Manual / Off / Auto,10A,

3 position toggle

Further complementing these mech-

anisms is the 30M - a 10A curved

rocker blank switch mechanism that

can be ordered with On Auto or Off

Auto printed on the dolly.

28

Technical Data

751 Series (non C-Bus)

Catalogue Numbers 750WP, 750WPR

Input Voltage 200 - 265V a.c., 50Hz

Maximum Load Current 750WP 5A750WPR 10A

Minimum Load 20mA (750WP only)

Detection Method Passive infrared detection of thermal radiation

Compatible Lighting Incandescent or fluorescent

Time Delay 5 secs to 8 mins, (nominal), infinitely variable within this range

Ambient Light Level Adjustment From full daylight to below 1 Lux (darken room)

Detection Area 18m x 110o

Number of Detection Zones 18 long range

16 intermediate range

10 short range

4 ultra short range

Installation Height 2.4m optimum mounting height.Sensor head vertical.

Leakage Current in the OFF state 2.0mA (max) @ 25oC (750WP only) Note 1

Operating Temperature Range 0oC to 50oC

Standard Colour GY - Grey

750WP Series (non C-Bus)

Note 1.

The two wire devices derive their

power through the load, therefore

the load is never completely

unenergised when off, as with

switch contacts.

Note 2.

These are typical specifications.

there may be noticeable differences

in the range due to differing conditions

such as background temperature,

speed of movement, types of

clothing worn etc.

Catalogue Numbers 751, 751R

Input Voltage 192 - 264V a.c., 50Hz

Maximum Load Current 751 2A751R 10A

Minimum Load 20mA (751 only)

Detection Method Passive infrared detection of thermal radiation

Compatible Lighting Incandescent or fluorescent

Time Delay 5 secs to 20 mins (nominal), infinitely variable within this range

Ambient Light Level Adjustment From full daylight to below 1 Lux (darken room)

Detection Area 6 x 6 metres, 90 degrees from sensor head. Sensor head rotatable 120 degrees when installed.

Installation Height 2.4m optimum mounting height. Unit may be wall mounted. Other installation heights mayresult in decreased scanning areas.

Leakage Current in the OFF state 2.0mA (max) @ 25oC (751 only) Note 1

Operating Temperature Range 0oC to 40oC

Overall Dimensions 100mm diameter by 57mm high

Mounting Centres 60.3, 84 and 50mm

Standard Colour WE - White Electric

Terminals 751 Line, load, 2 x loop accepts 3 x 2.5mm2 cable

751R Line, load, neutral, loop Accepts 3 x 2.5mm2 cable

750WP & 751 Series

Your comprehensive guideto installing Clipsal Infrascans

Inst

alla

tion

Gu

ide

Products of Gerard Industries Pty LtdABN 27 007 873 529

Head Office12 Park Terrace, BowdenSouth Australia 5007Telephone (08) 8269 0511Facsimile (08) 8340 1724Internet clipsal.comE-Mail plugin@clipsal.com.au

Offices in all StatesNSW Sydney (02) 9794 9200

Albury (02) 6041 2377

VIC Melbourne (03) 9207 3200Country Areas 1800 653 893

QLD Brisbane (07) 3244 7444Townsville (07) 4729 3333

SA Adelaide (08) 8269 0555

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TAS Hobart (03) 6272 3177Launceston (03) 6343 5900

NT Darwin (08) 8947 0278

Area RepresentativesNSW Albury (02) 6041 2377

Central Coast 0418 430 361Coffs Harbour 0418 653 183Dubbo 0418 822 564Newcastle 0407 298 792

0418 434 1690418 686 040

South West Sydney 0419 868 353Tamworth 0417 714 339Wagga Wagga 0418 578 903Wollongong 0418 423 581

ACT Canberra 0419 238 824Canberra/Goulburn 0418 164 070Canberra/Yass 0419 847 732

VIC Bendigo 0418 570 213Geelong 0418 527 233Gippsland 0418 512 680Western Victoria 0419 380 444

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WA Bunbury 0418 931 684Kalgoorlie & 0417 928 981Eastern Gold FieldsKarratha 0418 937 249

SA Riverland/Mildura/ 0418 596 145Broken Hill

Gerard Industries Pty Ltd reserves the right to changespecifications, modify designs and discontinue itemswithout incurring obligation and whilst every effort ismade to ensure that descriptions, specifications andother information in this catalogue are correct, nowarranty is given in respect thereof and the companyshall not be liable for any error therein.

O/N 850-462 OCT 01/02

©Copyright Gerard Industries Pty LtdPrinted by Custom Press Pty Ltd (08) 8346 7999

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