pp2052

DISCOVERY ENGINEERING PRODUCT GUIDE

Ionisation Smoke DetectorOptical Smoke DetectorTemperature DetectorMultisensor DetectorManual Call Point

Discovery® is a range of high-specification,analogue addressable fire detectors developed and manufactured by Apollo Fire Detectors Limited.

Designed to meet specifications for detectorsincorporated in sophisticated systems, Discoveryprovides engineers with an additional dimensionin fire protection capability.

In view of some of the advanced features of Discovery, we recommend that engineers familiarise themselves thoroughly with the rangeby reading this product guide carefully.

In addition to the familiar smoke (ionisation andoptical) and heat detectors, the Discovery rangefeatures a multisensor detector. This incorporatesan optical smoke sensor and a heat sensor whichcan operate independently or together, withthe analogue value being derived by means ofsophisticated algorithms. The multisensor detectormatches the strengths of both ionisation andoptical detectors, and can, in most installationsbe used instead of an ionisation detector.

Information in this guide is given in good faith, butApollo Fire Detectors cannot be held responsiblefor any omissions or errors. The company reservesthe right to change specifications of products atany time and without prior notice.

Key features

• Rejection of transientsignals

• Flashing LED option

• Five response modesfor ease of optimisationto changing environments

• Drift compensationto ensure constantsensitivity

• Four bytes of non-volatilememory for user data

• Alarm flag for fast alarmreporting

• Conventional alarm facilityduring CIE processor fault

• 360° visibility in alarm

• Compatible with XP95 systems

The Discovery range

• Ionisation smokedetector

• Optical smoke detector

• Heat detector

• Multisensor detector

• CO detector

• Manual call point

DISCOVERY TABLE OF CONTENTS

Communications 2

Discovery Features – Smoke and Heat Detectors

Response setting 3User bytes and other stored data 3Conventional alarm facility 4Flashing LED 4Remote test feature 4Rejection of transient signals 4

Discovery Features – Smoke Detectors

Drift compensation 5

Ionisation Smoke Detector

Operating principles 6Technical data 7

Optical Smoke Detector


Heat Detector


Multisensor Detector


Carbon Monoxide Detector


Mounting Bases

Technical description 17

Manual Call Point

Operating principles 18Non-standard call points 18Technical data 19

Mechanical construction 20Interchangeability 20Isolators 20Interfaces 20Sounders 20Maintenance of detectors 20Control panel compatibility 20Application of Discovery Detectors 21Approvals 22Patents 22

COMMUNICATIONS

Discovery uses a digital communications protocol which has beendeveloped from the XP95 protocol but which differs in that it allowscommunication in three different modes: Normal, Read and Write.The reason for developing the protocol is that the Discovery rangerequires a more extensive exchange of information than previousanalogue addressable ranges. In addition, Discovery can store datain non-volatile memory.

The Normal mode is identical to the XP95 protocol with theexception that the five additional analogue value bits in the XP95protocol extension have been re-defined for use as a mode selectionindicator (four bits) and a drift warning flag. This enables the controland indicating equipment (CIE) to distinguish between Discoveryand XP95 devices.

The Read mode is used to check information stored in the non-volatile memory of each detector. It is accessed by using a simpleextension to the Normal mode communication method from thecontrol and indicating equipment (CIE) to the detector.

In Write mode the CIE is able to write information to the detector byextending the communication method in the same way as in Readmode.

The detector does not return its analogue value during Read or Writemodes, but, in the event of the detector calculating an alarm valueduring this time, it can use the alarm flag and alarm addressmechanism to alert the CIE to its status.

Discovery detectors are compatible with XP95. It should be noted,however, that Discovery features will not be available whenDiscovery is used with XP95 control panels. Panels with driftcompensation algorithms should disable the algorithms whencommunicating with Discovery.

For a full description of the Discovery protocol, refer to Apollo publication PP2027, Discovery Protocol PIN Sheet.

DISCOVERY FEATURES –SMOKE AND HEAT DETECTORS

Response settingEach detector in the Discovery range canoperate in one of five response modes, any ofwhich can be selected from the control panel.Each mode corresponds to a unique responsebehaviour, which can be broadly related tosensitivity to fire. Whatever the type ofdetector, Mode 1 will give a higher sensitivityto fire than Mode 5. The selection of the mostsuitable mode depends on the application.Guidance on detector and mode selection isgiven on pages 21-23.

For ionisation and optical smoke detectors,the modes relate to different combinations ofsmoke response threshold and response time.For the heat detector, the mode relates to thefixed temperature setting and the sensitivity torate-of-rise of temperature. For themultisensor, the mode relates to the levels ofsmoke and heat sensitivity and to the way inwhich the responses of the two sensors arecombined.

The response characteristics of the detectorshave been carefully set so that detectors willcomply with the requirements of the relevantpart of EN54 in all response modes. Themathematical algorithms embedded in thedetectors are used to carry out changes incharacteristics between modes. Since theresponse characteristics are defined withinthe detectors, Apollo takes responsibility forcompliance with standards in different responsemodes.

The internal signal processing of the detectorsis designed so that the analogue valuereported is always close to 25 for a normalcondition. The alarm threshold is 55,

irrespective of the response mode selected.Similarly, the alarm flag in the protocol isalways set when the analogue value exceeds55, irrespective of mode. This simplifies theswitching between response modes since thealarm threshold in the control panel canremain fixed at 55 and the alarm flag is validin all modes.

The response mode, which is selectedthrough the protocol, is stored in non-volatilememory and will therefore be retained whenthe detector is powered down. All Discoverydetectors are factory set to mode 3 beforeshipping.

Response modes are defined more fully in theindividual detector descriptions.

User bytes and other stored dataAll Discovery devices contain non-volatilememory, in the form of Electrically ErasableProgrammable Read Only Memory(EEPROM), which is included primarily tostore data needed for the correct operation ofthe device. However, four bytes of thisEEPROM are available to the user and can beaccessed by the control panel through theprotocol. This block of non-volatile memorycan be used, for example, to store theinstallation date, the site code or date of lastservice. The only restriction on use is that themaximum number of write cycles should notexceed 20,000 over the life of the device.

The way in which this memory can beaccessed is described in the DiscoveryProtocol PIN Sheet PP2027.

Conventional alarm facilityDiscovery devices should be polled at regularintervals to maintain communication with thecontrol panel and therefore enable correctmonitoring of the protected premises.However, if the polling mechanism fails, forexample because of a processor failure in thepanel, the internal operation of the Discoverydevice will be unaffected as long as a DCsupply is maintained. After 108± 4 secondswithout protocol, the device willautomatically switch to its conventional alarmmode. In this mode it will operate as if it werea conventional detector (or manual call point)and will impose an alarm signal on the loop ifan alarm condition is detected by the internalprocessing.

The alarm signal takes the form of periodiccurrent pulses, which can be detected bysimple hardware in the control panel. A fulldescription of the signal can be found in theDiscovery Protocol PIN Sheet PP2027.

Flashing LEDAll Discovery detectors have two integral LEDindicators, which can be illuminated at anytime by the control panel to indicate devicesin alarm. When activated, the LEDs will drawan extra 3mA from the loop. In addition tothis mode of operation it is possible to enablea flashing LED mode by writing to one of thememory locations. In this mode the LEDs willflash each time the device is polled. Thedevice does not draw extra current in thismode since the LED current is part of thenormal current pulse reply from the device.

This facility is available on all Discoverydetectors and the manual call point.Discovery detectors and call points arefactory set to non-flashing mode.

Remote test featureThis feature, available on all Discoverydetectors and the call point, is enabled fromthe CIE by changing the state of a forwardcommand bit. On receipt of the commandthe detector is forced by electrical means into

an alarm condition. After a delay ofapproximately 10 seconds due to signalprocessing, an analogue value of between 54and 120 – nominally 85 – is returned,provided that the detector is functioningcorrectly. This value is sustained until theforward command bit is changed back to itsoriginal state, after which a period of 40seconds is required for the detector to returnto its normal analogue value.

The manual call point is different in that thereceipt of the command bit will cause the callpoint to generate the interrupt sequence,followed by a sustained value of 64. The callpoint resets when the forward command bit ischanged back to its original state. For furtherdetails of this function, see Discovery ProtocolPIN Sheet, PP2027.

Rejection of transient signalsAll Discovery detector algorithms aredesigned to give low sensitivity to very rapidchanges in the sensor output, since these areunlikely to be caused by real fire conditions.This is achieved by digital low-pass filteringof the sensor values which optimises therejection of false alarm sources whilemaintaining the response to fire.

The filter parameters depend on the modeselected and for some modes the filtering isminimal. The filtering has no significant effecton the response to fires but does affect theway in which detectors respond to transientsand to step changes of smoke or heat. This isseen in the “minimum time to alarm” given inindividual detector specifications. These timesrepresent the time taken by the detector toreach the alarm condition when respondingto a large step change in input.

Servicing NoteThe “minimum time to alarm” referred toabove is important when detectors aretested in situ, for example using aerosoltest gas. A delay in response may beapparent.

page 4

DISCOVERY FEATURES –SMOKE DETECTORS

Drift compensationAll Discovery smoke detectors includecompensation for sensor drift as part of theinternal signal-processing algorithm. Thealgorithm will compensate for changes insensor output caused, for example, by dust inthe chamber, and will therefore hold thesensitivity at a constant level even withsevere chamber contamination. Thisincreased stability is achieved withoutsignificantly affecting the detector’ssensitivity to fire.

The compensation level is stored in thedetector’s memory as a single value between0 and 31. The normal level, that is, with nocompensation applied, is 16. Values aboveor below this indicate drift towards alarm oraway from alarm respectively.

For compensation values in the range 4 to 30the detector is working within its allowablerange. A value which is less than 4 or greaterthan 30 results in a warning flag. A value ofzero results in a fault signal.

The maximum compensation that can beapplied is 31. If further drift occurs, theanalogue values will simply track the driftand the detector will become more sensitive.

Compensation values are stored in non-volatile memory and will be retained even ifdetectors are disconnected. It is possible touse the control panel to ascertain the level ofcompensation applied at any time.

For the Discovery smoke detectors, thecompensation algorithms are designed suchthat the detectors meet the requirements ofthe European draft standard EN54–7:2000 inall response modes.

It is possible, through the protocol, to carryout a normalisation procedure which rapidly“updates” the drift compensation. Thisfacility may be useful during commissioningwhen detectors can be quickly acclimatisedto the prevailing ambient conditions, or aftera compensated detector has been cleaned.

page 5

Fig.1 Drift Compensation Graph

reference and smokechambers, the sensingelectrode converts variationsin chamber current intovoltage changes.

When smoke particles enterthe ionisation chamber, ionsbecome attached to themwith the result that thecurrent flowing through thechamber decreases. This effect is greater in thesmoke chamber than in thereference chamber, and theimbalance causes thesensing electrode to becomemore positive.

The analogue voltage at the

sensor electrode isconverted to a digital formatwhich is processed toprovide an analogue valuefor transmission to thecontrol panel when thedevice is polled.

Ionisation smoke detectorsare supplied in individualpacking with a red lidserving as a dust coverwhich can be left in placeafter fitting to preventingress of foreign materialuntil commissioning of thesystem takes place. At thispoint the covers must beremoved.

DISCOVERY IONISATION SMOKE DETECTOR

Discovery Ionisation Smoke Detector Part Number 58000-500

OPERATINGPRINCIPLES

The Discovery ionisationsmoke detector has amoulded whitepolycarbonate case withwind-resistant smoke inlets.Inside the case is a printedcircuit board which has theionisation chamber mountedon one side and the signalprocessing andcommunications electronicson the other.

The ionisation chamberconsists of a referencechamber contained inside asmoke chamber (Figure 2).

Fig.2 Sectional view - Discovery Ionisation Smoke Detector

Mode Alarm Minimum timethreshold to alarm y value (sec)

1 0.45 52 0.45 303 0.70 54 0.70 305 1.0 5

Compensation rate complies with EN54–7:2000

Table 1 Ionisation detector operating modes

Address Buttons10V on Foil Holder

Radioactive FoilCase Moulding

Lid Moulding

LED

Smoke Chamber0VInner Cover Inner Chamber

PCB

LED

The outer smoke chamberhas inlet apertures fittedwith insect resistant mesh. The radioactive sourceholder and the smokechamber form positive andnegative electrodesrespectively. An Americium241 radioactive sourcemounted within thereference chamberirradiates the air in bothchambers, producingpositive and negative ions.A voltage across theelectrodes produces anelectric field.Ions are attracted to theelectrode of the oppositesign to their own charge;many recombine but asmall electric current flowsbetween the electrodes. Atthe junction between

Terminal functions:L1 & L2 supply in and out

connections+R remote indicator

positive connection (internal 2.2kΩresistance to positive)

–R remote indicator negative connection(internal 2.2kΩresistance to negative)

Operating voltage:17–28V DC

Communication protocol:Apollo Discovery 5–9V peak to peak

Quiescent current:500µA average 750µA peak

Power-up surge current:1mA

Maximum power-up time:10s

Alarm current, LEDilluminated:3.5mA

Remote outputcharacteristics:Connects to positive linethrough 4.5kΩ (5mAmaximum)

Clean-air analogue value:23 +4/–0

Alarm level analogue value:55

Alarm indicator:2 red Light Emitting Diodes(LEDs). Optional remote LED

Electro-magneticcompatibility:

markedA copy of the relevantdeclaration is available onrequest

Temperature range:Max. continuousoperating +60°CMin. continuousoperating 0° CMin. operating –20°C(no condensation/icing)Storage –30°C to +80°C

Humidity:0 to 95% relative humidity(no condensation)

Effect of temperature:Less than 10% change insensitivity over rated range

SAFETY NOTE

In the United Kingdom,ionisation smoke detectorsare subject to therequirements of theRadioactive Substances Act1960 and to the IonisingRadiations Regulations1985 made under theprovisions of the Health andSafety at Work Act 1974.

The detectors,independently tested by theNational RadiologicalProtection Board (NRPB),conform to all the

Effect of atmosphericpressure:Less than 15% change insensitivity up to 2000m

Effect of wind:Less than 20% change insensitivity at speeds up to10m/s.

Note: slow changes inambient conditions willautomatically be compensatedand will not affect sensitivity

Vibration, Impact andShock: To EN54–7:2000

IP rating:43

Dimensions:100mm diameter; 42mm height50mm (height in base)

Weight:Detector 105gDetector in base 160g

Materials:Housing: Whitepolycarbonate V–0 rated toUL94Terminals: Nickel platedstainless steel

requirements specified inthe ‘Recommendations forionisation smoke detectorsin implementation ofradiation standards’published by the NuclearEnergy Agency of theOrganisation for EconomicCo-operation andDevelopment (OECD) 1977.

There is no limit to thenumber of ionisation smokedetectors which may beinstalled in any fireprotection system.

Storage regulations dependon local standards andlegislation, but, in the UK,up to 500 detectors may bestored in any premises,

Guidance on storage andhandling can be given byApollo Fire Detectors andfull details can be requestedfrom:

Radioactive SubstancesRegulation FunctionEnvironment AgencyRio House, Waterside DriveAztec West, AlmondsburyBristol BS32 4UD.

Outside the UK, pleasecontact the relevantnational agency.

TECHNICAL DATA

Discovery Ionisation SmokeDetector Part No 58000-500

Specifications are typical at24V, 23°C and 50% relativehumidity unless otherwisestated.

Detection principle:Ionisation chamber

Chamber configuration:Twin compensatingchambers using one singlesided ionising radiationsource

Radioactive isotope:Americium 241

Activity:33.3 kBq, 0.9µCi

Type code:Bits 2 1 0 4 3 7 6 5

0 1 1 0 0 0 0 0

Supply wiring:Two-wire supply, polarityinsensitive

although there arestipulations on storagefacilities if more than 100ionisation detectors arestored in one building.

At the end of theirrecommended working lifeof ten years, ionisationsmoke detectors should bereturned to Apollo for safedisposal or disposed of in anotherwise locally approvedand environmentally safemanner. Please see"A guide to the care,maintenance and servicingof Apollo products",PP2055.

The IR LED emits a burst of

collimated light everysecond. In clear air thephoto-diode receives nolight directly from the IRLED, because of the angulararrangement and thechamber baffles. Whensmoke enters the chamber itscatters light from the

emitter IR LED onto thephoto-diode in an amountrelated to the smokecharacteristics and density.The photo-diode signal isprocessed to provide ananalogue value fortransmission when thedetector is interrogated.

DISCOVERY OPTICAL SMOKE DETECTOR

Discovery Optical Smoke Detector Part Number 58000-600

OPERATINGPRINCIPLES

The Discovery opticaldetector uses the same outercase as the ionisation smokedetector and is distinguishedby the indicator LEDs whichare clear when the detectoris in quiescent state and redin alarm. Within the case isa printed circuit boardwhich, on one side, has thelight-proof chamber with

Fig.3 Top section - Discovery Optical Smoke Detector

Mode Alarm threshold Minimum%/m time to alarm

(sec)

1 1.4 52 1.4 303 2.1 54 2.1 305 2.8 5

Compensation rate complies with EN54–7:2000

Table 2 Optical detector operating modes

Optical Chamber Address Buttons

PCB Cover Photo-Diode

Case Moulding Infra-Red LED

integral gauze surroundingthe optical measuringsystem and, on the other,the signal processing andcommunications electronics.

An infra-red light emittingdiode within its collimatoris arranged at an obtuseangle to the photo-diode.The photo-diode has anintegral daylight-blockingfilter (Fig.3).



positive connection(internal 2.2kΩresistance to positive)

–R remote indicator negative connection(internal 2.2kΩresistance to negative)


Communication protocol:Apollo Discovery 5–9V peak to peak





Remote outputcharacteristics:Connects to positive linethrough 4.5Ω (5mAmaximum)



Alarm indicator:2 colourless Light EmittingDiodes (LEDs); illuminatingred in alarm. Optionalremote LED



Temperature range:Max. continuousoperating +60°CMin. continuousoperating 0°CMin. operating –20°C(no condensation/icing)Storage –30°C to +80°C


Effect of temperature:Less than 15% change insensitivity over rated range.Note: slow changes inambient conditions willautomatically be compensatedand will not affect sensitivity

Effect of atmosphericpressure:None

Effect of wind:None

Vibration, Impact andShock: To EN54–5:2000

IP rating:43



Materials:Housing: Whitepolycarbonate V–0 rated to UL94Terminals: Nickel platedstainless steel

TECHNICAL DATA

Discovery Optical SmokeDetector Part No: 58000-600

Specifications are typical at 24V, 23°C and 50%relative humidity unlessotherwise stated.

Detection principle:Photo-electric detection oflight scattered in a forwarddirection by smoke particles

Chamber configuration:Horizontal optical benchhousing infra-red emitter andsensor, arranged radially todetect forward scattered light

Sensor:Silicon PIN photo-diode

Emitter:GaAlAs infra-red lightemitting diode

Sampling frequency:1 per second


1 0 1 0 0 0 0 0


approximately linearcharacteristic from 10°C to80°C. This linearised signal isfurther processed, dependingon the response modeselected, and converted toan analogue output.

For the European standardversion of the detector, thefive modes correspond to five“classes” as defined in thedraft standard EN54–5:2000.The classes in this draftstandard correspond withdifferent responsebehaviour, each of which isdesigned to be suitable for arange of applicationtemperatures. All modesincorporate “fixedtemperature” response,which is defined in the draftstandard by the “staticresponse temperature”. Theapplication temperaturesand static responsetemperatures for all responsemodes are given in Table 3.

In addition to the basicclassification, a detector

may be given an “R” or “S”suffix. The “R” suffixindicates that the detectorhas been shown to have arate-of-rise characteristic.Such a detector will stillgive a rapid response evenwhen starting from anambient temperature wellbelow its typical applicationtemperature. This type ofdetector is therefore suitablefor areas such as unheatedwarehouses in which theambient temperature maybe very low for longperiods.

The “S” suffix on the otherhand indicates that thedetector will not respondbelow its minimum staticresponse temperature evenwhen exposed to high ratesof rise of air temperature.This type is thereforesuitable for areas such askitchens and boiler roomswhere large, rapidtemperature changes areconsidered normal.

DISCOVERY HEAT DETECTOR

Discovery Heat Detector Part Number 58000-400

OPERATINGPRINCIPLES

Discovery heat detectorshave a common profile withionisation and optical smokedetectors but have a low airflow resistance case made ofself-extinguishing whitepolycarbonate.

The Discovery heat detectoruses a single thermistor tosense the air temperature atthe detector position. Thethermistor is connected in aresistor network, whichproduces a voltage outputdependent on temperature.The design of the resistornetwork, together with theprocessing algorithm in themicrocontroller, gives an

Fig.4 Discovery Heat Detector

Address Buttons Thermistor Bead

PCB

Case Moulding

Heat Shrink Sleeving

Lid Moulding

LEDLED


Communication protocol:Apollo Discovery 5–9V peakto peak







Alarm indicator:2 red Light Emitting Diodes(LEDs).Optional remote LED



Temperature range:Max. continuous operating see Table 3Min. continuous operating 0°CMin. operating –20°C(no condensation/icing)Storage –30°C to +80°C


Vibration, Impact andShock:To EN54–5:2000

IP rating:53

Dimensions:100mm diameter; 42mmheight


Materials:Housing: Whitepolycarbonate V–0 rated to UL94Terminals: Nickel platedstainless steel

TECHNICAL DATA

Discovery Heat DetectorPart No: 58000-400

Specifications are typical at24V, 23°C and 50% relativehumidity unless otherwisestated.

Detection principle:Temperature sensitive resistance.

Type code:2 1 0 4 3 7 6 51 1 0 0 0 0 0 0





–R remote indicator negative connection (internal 2.2kΩresistance to negative)

Mode Class Application Static Response (EN54–5:2000) Temperature °C Temperature °C

Typ Max Min Typ Max

1 A1R 25 50 54 57 652 A2 25 50 54 61 703 A2S 25 50 54 61 704 CR 55 80 84 90 1005 CS 55 80 84 90 100

For air temperatures in the range 15°C to 55°C, the analogue value for a detector inmode 1 will correspond approximately to the air temperature.

Table 3 Heat Detector response modes

without the presence of smoke,if sustained for 20 seconds.

The processing algorithms inmodes 1 to 4 incorporatedrift compensation.

The characteristics of thefive response modes aresummarised below.

Mode 1 has very high smokesensitivity combined withhigh temperature sensitivity.This gives a high overallsensitivity to both smoulderingand flaming fires.

Mode 2 has a smokesensitivity similar to that of anormal optical smokedetector but has no responseto temperature. This mode istherefore equivalent to astandard optical detector. Itis suitable for applications inwhich wide temperaturechanges occur under normalconditions.

Mode 3 has moderate smokesensitivity combined with amoderate sensitivity to heat.This combination isconsidered the optimum formost general applicationssince it offers good responseto both smouldering andflaming fires.

Mode 4 has lower thannormal smoke sensitivitycombined with high heatsensitivity. This makes itsuitable for applications in

DISCOVERY MULTISENSOR DETECTOR

Discovery Multisensor Detector Part Number 58000-700

OPERATINGPRINCIPLES

The Discovery multisensordetector contains an opticalsmoke sensor and athermistor temperaturesensor whose outputs arecombined to give the finalanalogue value. The way inwhich the signals from thetwo sensors are combineddepends on the responsemode selected. The fivemodes provide responsebehaviour which incorporatespure heat detection, puresmoke detection and acombination of both. Themultisensor is thereforeuseful over the widest rangeof applications.

The multisensor constructionis similar to that of theoptical detector but uses adifferent lid and opticalmouldings to accommodate Fig.5 Sectional view - Discovery Multisensor Detector

PCB Twin Alarm LEDs RFI Shield

Externalmoulding

Chamber cutaway to revealoptical bench

ThermistorOptical chamber

the thermistor temperaturesensor. The sectional view(Fig 5) shows thearrangement of the opticalchamber and the thermistor.

The signals from the opticalsmoke sensing element andthe temperature sensor areindependent, and representthe smoke level and the airtemperature respectively inthe vicinity of the detector.The detector’s micro-controller processes the twosignals according to themode selected. When thedetector is operating as amultisensor (i.e. modes 1, 3and 4) the temperaturesignal processing extractsonly rate-of-rise informationfor combination with theoptical signal. In thesemodes the detector will notrespond to a slowtemperature increase – evenif the temperature reaches ahigh level. A large suddenchange in temperature can,however, cause an alarm

which a certain amount offumes or smoke isconsidered normal.

Mode 5 has no smokesensitivity at all, but gives apure heat detector responsemeeting the response timerequirements for a Class A1detector in the draft Europeanstandard EN54–5:2000. Inthis mode the detector willrespond to slowly changingtemperatures and has a“fixed temperature” alarmthreshold at 58°C. Theanalogue value in this modewill give the approximateair temperature over therange 15°C to 55°C.

In mode 5, the smoke sensoris still active though it doesnot contribute to the analoguesignal. As a consequence, ifthe detector is used in adirty or smoky environmentthe optical sensor drift flagmay be activated in theheat-only mode.

Note: in situ testing of themultisensor detector shouldbe carried out as for smokedetectors in response modes1-4 and for heat detectors inresponse modes 5.

Design Note: if themultisensor is to be used inmode 5, heat detectorspacing/coverage should beapplied.


Communication protocol:Apollo Discovery 5–9V peakto peak








Alarm indicator:2 colourless Light EmittingDiodes (LEDs); illuminatedred in alarmOptional remote LED


marked

A copy of the relevantdeclaration is available onrequest

Temperature range:Max. continuous operating +60°CMin. continuous operating 0°CMin. operating –20°C(no condensation/icing)Storage –30°C to +80°C


Effect of temperature onoptical sensor:Less than 15% change insensitivity over rated range.Slow changes in ambientconditions will automaticallybe compensated and will notaffect sensitivity

Effect of atmosphericpressure on optical sensor:None

Effect of wind on opticalsensor:None

Vibration, Impact and Shock: To EN54–7:2000

IP rating:43



Materials:Housing: Whitepolycarbonate V–0 rated toUL94Terminals: Nickel platedstainless steel

Smoke element only:

Chamber configuration:Horizontal optical benchhousing infra-red emitter and sensor, arranged radially to detect forwardscattered light

Sensor:Silicon PIN photo-diode

Emitter:GaAlAs infra-red lightemitting diode


TECHNICAL DATA

Discovery MultisensorDetector, Part No 58000-700

Specifications are typicaland apply at temperature23°C and relative humidity50% unless otherwisestated.

Detector principle:Smoke: Photoelectricdetection of light scattered by smoke particles

Heat: Temperature-sensitiveresistance


1 0 1 1 1 0 0 0





–R remote indicator negative connection (internal 2.2kΩresistance to negative)

Mode Smoke Sensitivity Temperature Sensitivity Response Type Minimum Time to(grey smoke) (relative) Alarm (seconds)

% per m % per ft

1 1.1 0.35 High Multisensor 202 2.1 0.7 No response to heat Optical 303 2.8 0.9 Low Multisensor 204 4.2 1.4 High Multisensor 205 No response to smoke See text Heat A1 30

Table 4 Multisensor Detector operating modes

DISCOVERY CARBON MONOXIDE DETECTOR

Discovery Carbon Monoxide Detector Part Number 58000-300

OPERATINGPRINCIPLES

Discovery CO fire detectorscontain a long-life electro-chemical carbon monoxidesensor which is tolerant oflow levels of commonvapours and householdproducts. The sensingtechnology is fast, accurateand needs only very lowpower. These factors makethe CO sensor suitable forfire detection applications.

The detection capabilitiesare enhanced by a rate-sensitive response. Fast risesin the carbon monoxidelevel are often associatedwith hot fires and thedetector will respond earlierunder these conditions. Theanalogue reply from thedetector is rate limited toremove nuisance alarmsresulting from short-term

high levels caused bysources such as pipesmokers or gas flameignition.

APPLICATION

CO detectors do not detectsmoke particles or heat andare not universalreplacements for smokedetectors.Apollo does not endorse theuse of CO detectors as themain method of firedetection if:

the protected area is anescape route

there is a requirement todetect overheating ofelectrical equipment orcables

the protected area isexposed to sources of COsuch as vehicle exhausts,or to hydrogen or to high

levels of alcohol vapouras emitted by somecleaning agents

there is a requirement todetect fires involvingflammable liquids

CO fire detectors areparticularly suitable forsupplementing smokedetection when there is:

a deep seatedsmouldering fire risk

a risk of fire starting in anenclosed space

a likelihood ofstratification taking place

Carbon monoxide detectorsmay be used as the primaryfire detector in areas wherethe following conditionsexist:

the main risk issmouldering fires

optical smoke detectorsare deemed unsuitable(see ‘FALSE ALARMS’below)

the fire compartment isnot greater than 50m2

Typical applications includehotel bedrooms, halls ofresidence, shelteredaccommodation andhospital wards.

DETECTOR SITING

CO fire detectors shouldbe sited using therecommendations for smokedetectors from BS5839: Part1 (or other applicable code).

In the development of a fire,smoke and CO in thesmoke plume is spread byconvection to a fire detector.As CO is a gas, it furtherspreads—like smells—bydiffusion. For this reasonCO may reach a detectorfaster than smoke would.

This potential advantagecan be exploited whendesigning a fire protectionsystem and CO detectorsmay be used forsupplementary detection.Equally, the opposite effectmight occur, with COmoving away from adetector.

The behaviour of CO istherefore unpredictable anddiffusion should not berelied on when designing afire protection system.

FALSE ALARMS

Carbon monoxide detectorsare less susceptible thansmoke detectors to falsealarms from sources such astoast, steam, cooking,plumbing work and hairspray. They may thereforebe used in someapplications in whichsmoke detectors would besusceptible to unwantedalarms.

Conversely, they may bemore susceptible thansmoke detectors to falsealarms from fumescontaining CO, such asvehicle exhausts, open firesand gas appliances.

LIMITATIONS

Carbon monoxide detectorsalso have importantlimitations. They are set toa higher sensitivity than themaximum allowed by thedomestic CO alarmstandard and will respondto CO from faulty gasappliances or vehicleexhausts. These detectorsshould not be used in placeof carbon monoxide alarmscomplying with BS7860 orUL2034.

OPERATINGMODES

The Discovery CO detectorhas five operating modes,each having a setcombination of sensitivityand response delay, whichthe user can select for anygiven application. See tableon page 16.

DRIFTCOMPENSATION

In view of the inherentstability of CO cells, there isno need for Discovery COdetectors to compensate fordrift. Discovery COdetectors are set to report adrift value of 16.

CELL TEST

The Discovery carbonmonoxide fire detector hasa remote test feature, whichis used to verify that theelectro-chemical cell is fittedand that it is active. A testmust be carried out at leastonce a year but preferablymore frequently to ensurethat the cell has not driedout. (Note that the cell willnot be affected by the test,even if the remote test iscarried out once a day.)

If the test indicates a sensorfailure, ie, the detector returnsa pre-set analogue value of 25,the detector should be sent toApollo’s Service Departmentfor cell replacement anddetector recalibration.

PRECAUTIONSWHENINVESTIGATINGALARMS

It is important to rememberthat CO is a colourless,odourless gas, which is notdirectly detectable byhuman senses. If a CO firedetector is in an alarmcondition, it is possible thata dangerous level of COexists around the detector.Extreme care must be takenwhen investigating alarmsfrom CO fire detectors evenif no combustion productscan be seen or smelled.

Because of this danger, it isimperative that CO firedetectors are correctlyidentified at the controlpanel so that personnelinvestigating alarms may takethe relevant precautions.

MAINTENANCEAND SERVICE

The electrochemical cellused in the Discovery COfire detector has a morelimited life than wouldnormally be expected froma smoke detector. In atypical environment, the lifeof the cell is seven years.

High temperature or lowrelative humidity can,however, reduce the lifesignificantly. The limitsgiven in the section‘technical data’ overleafshould be carefullyobserved.

It is essential that systemsusing CO fire detectors becorrectly maintained andthat the maintenanceschedule include functionaltesting of the CO firedetectors.

CO fire detectors will notrespond to the aerosoltesters commonly used forthe in-situ testing of smokedetectors. Apollorecommends that CO firedetectors be tested using a“hand warmer”, burningcompressed charcoal fuelrods. These hand warmersare available in campingand outdoor shops. Thecharcoal rod should beignited at one endaccording to theinstructions. To achieve areliable test, the completehand warmer should beplaced inside a hood whichfits over the detector,allowing CO to build uparound the detector. TheApollo (No Climb) detectortester can be used for thispurpose.

If there is any doubt overthe sensitivity of a

Discovery CO fire detectorit should be returned toApollo for servicing andcalibration.

HEALTH ANDSAFETYGUIDELINES

This product contains asealed electro-chemical celland in normal usagerepresents no chemicalhazard in the sense ofCOSHH and the Health andSafety at Work Act 1974.Chemical hazard can,however, arise if thefollowing notes on storage,handling and disposal arenot observed.

For maximum life, theproduct should be storedbefore installation in cleandry conditions between 0°Cand 20°C. It should not beexposed to temperaturesoutside the range –40°C to+60°C or to organicvapours.

The electrochemical cellcontained in this product isfitted into sockets on theprinted circuit board; toavoid damage to the cell donot remove it.

The electrochemical cellcontains sulphuric acid in arelatively concentratedstate. In the event ofleakage (which may becaused by mechanicaldamage or use outside theoperating specification forthe cell) the cell should beremoved from the detectorusing protective gloves.Avoid contact with anyliquid. If skin or eyecontact with the electrolyteoccurs, wash immediatelywith plenty of water and


Communication protocol:Apollo Discovery 5–Vpeak to peak

Quiescent current:500µA average, 750µApeak






Clean air analogue value:25±2


Alarm indicator:2 red Light Emitting Diodes(LEDs);Optional remote LED


marked

Storage Temperature:Continuous: +10˚C to +30˚CTransient: –40˚C to +55˚C

Storage Pressure:If air freighted this productshould be placed in apressurised hold

Operating Pressure:Atmospheric ±10%

Operating Temperature:Continuous: 0˚C to +50˚CTransient: –20˚C to +50˚C(no condensation/icing)

Operating Humidity:Continuous: 15% to 90% RHTransient: 0% to 99% RH

Cell Life:maximum 7 Years(assumes regular checksare satisfactory)

Effect of temperature ondetector:Less than 15% change insensitivity over rated range

Effect of wind:None

Vibration, Impact andShock:To EN54–7:2000

IP rating:43

Dimensions:100mm diameter42mm height50mm (height in base)


Materials:Housing: White

polycarbonate, V–0 rated to UL94

Terminals: Nickel plated stainless steel

TECHNICAL DATA

Discovery CarbonMonoxide Fire Detector

Specifications are typicaland apply at 24V, 23˚Cand 50% relative humidityunless otherwise stated.

Detector Part no:58000-300

Base Part no:45681-210

Detector principle:Ambient carbon monoxidelevel


0 1 1 0 1 0 0 1

Supply wiring:Two-wire supply, polaritysensitive

Terminal functions:L2 positive supply in

and out connectionsL1 negative supply in

and out connections +R remote indicator

positive connection(internal 2.2kΩresistance to positive)

–R remote indicatornegative connection(internal 2.2kΩresistance tonegative)

obtain medical advice. Alltraces of electrolyte shouldbe washed away withcopious amounts of clean

Mode Alarm Threshold Minimum time to Typical application(ppm) alarm (seconds)

1 30 60 Sleeping with no ambient CO

2 45 30 General use fast response such as supplementary protection in atria

3 45 60 General use and sleeping risk with some low-level CO(such as from light smoking or an unventilated gas fire)

4 60 30 General smoking area and supplementary detection of deep seated fires such as laundry rooms

5 75 30 Supplementary use in kitchen or boiler room

Table 6 Relative performance of detectors in test fires

water. The cell should bedisposed of according tolocal waste managementrequirements and

environmental legislation.It should not be burnt sinceit may release toxic fumes.

DISCOVERY MOUNTING BASES

An earth connection is notrequired for either safety orcorrect operation ofdetectors. The ground (earth)terminal is isolated and isprovided for tidy terminationof grounded conductors orcable screens and tomaintain earth continuitywhere necessary.

All terminals are markedaccording to their function.

Bases have a wide interiordiameter for ease of accessto cables and terminals andthere are two slots for fixingscrews. The slots enable twofixing screws to be locatedat a spacing of 51 to 69mm.

Detectors fit into bases oneway only, without snagging,and require clockwiserotation without push forceto be plugged in.

Universal patented addresscards, known as XPERTcards, are supplied with allbases. Consult the codingguide in the installationinstructions to determinewhich pips are to beremoved from the card togive the correct address. Laythe card on a flat surface, pipsdown, insert a screwdriverinto the slot on the reverseof the pip to be removedand give a firm twist.

When the card is codedinsert it into the slot in theside of the appropriate base,making sure that the cardlocks itself into place. As adetector is inserted into thebase, the remaining pipsoperate the address buttonson the detector and thedetector electronics readsthe address.

Discovery/XP95 Mounting Base Part Number 45681-210 with XPERT card

TECHNICAL DESCRIPTION

All detectors in theDiscovery range fit intoXP95 mounting bases. Full details of bases andmounting accessories aregiven in PP1089 and PINsheets PP2040 and 2043.

The bases are of 100mm diameter and have fiveterminals:

L1 line in and line out double terminal

L2 line in and line out double terminal

–R remote LED negative supply double terminal

+R remote LED positive supply double terminal

E earth single terminal

point has only one responsemode. This is factory presetto 16.

A single alarm LED isprovided on the call point.This LED is controlled,independently of the callpoint, by the CIE and maybe set to flash each time thecall point is polled.

Call points can be remotelytested from the control andindicating equipment bytransmission of a single bitin the communicationsprotocol. Call pointsrespond by providing ananalogue value of 64 whichcorresponds to the alarmvalue. The CIE shouldrecognise this response as atest signal and should notraise a general alarm.

DISCOVERY MANUAL CALL POINT

Discovery Manual Call Point (MCP) For Part Numbers see Table 5

The Discovery Manual Call Point is available in two versions:

Part no. 58000-910 For surface mounting, incorporating the call pointassembly and a back-box.

Part no. 58000-920 For flush mounting, incorporating the call point assemblyand a terminal tray.

For flush mounting an outlet (pattress) box with aminimum depth of 25mm is also needed.

OPERATINGPRINCIPLES

The Discovery call point isbased on the KAC WorldSeries.

The address of each callpoint is set at thecommissioning stage bymeans of a seven-segmentDIL switch.

If an MCP is activated itinterrupts the normalprotocol to give a fastresponse. For full details ofthe patented interruptfeature, see publicationPP2027.

The Discovery call point has4 bytes of non-volatilememory available for theuser in the same way asDiscovery detectors. Thecall point has theconventional alarm facility.The Discovery manual call Table 5 Manual Call Point Part Numbers

NON-STANDARDMANUAL CALLPOINTS

Manual call points approvedfor use in countries applyingDIN standards are available,as are XP95 manual callpoints for outdoor use or forspecial purposes, such asinitiating an ‘Evacuate’alarm. It should beremembered, however, thatXP95 manual call pointshave no user bytes availableand do not have theDiscovery conventionalalarm facility.

Alarm indicator:Red Light Emitting Diode(LED)


1 1 1 1 1 0 0 0


Loop connections L1/L2:Flying leads with spadeterminals


Communication protocol:Apollo Discovery 5–9Vpeak to peak





Normal analogue value:16

Alarm state value:64



Temperature range:Max. continuous operating +60°CMin. continuous operating 0°CMin. operating –20°C(no condensation/icing)Storage –30°C to +80°C


Vibration, Impact andShock: To BS5839: Part 2

IP rating:53

Dimensions:87mm x 87mm x 52mm(surface mount version)

Materials:Housing: Red self-colouredPC/ABS

TECHNICAL DATA

Manual Call Point

Specifications are typicaland apply at temperature23°C and relative humidity50% unless otherwisestated.

Call point type:Break glass

Part No 58000-910surface mount assembly Weight 190gPart No 58000-920flush mount assemblyWeight 180g

Part No 26729-107back-boxPart No 26729-110terminal tray

Call point principle:Operation of a switch

CONTROL PANELCOMPATIBILITY

Discovery detectors aredesigned to be operated withpurpose-designed controland indicating equipmentthat makes full use of theirfeatures. Discovery can,however, be connected toany control panel which canoperate existing ranges ofApollo analogue addressabledetectors with the previouslynoted rule, that the controland indicating equipmentmust not have a driftalgorithm operating onDiscovery devices. Contactthe panel manufacturer forguidance. For a list ofcompatible panelmanufacturers, see Apollopublication PP1010.

INTERFACES

All XP95 interfaces are fullycompatible with Discoverydetectors and call points.Please see the InterfacesBrochure, PP2025, forfurther information.

SOUNDERS

Loop sounders developedfor use with XP95 systemsmay be used in exactly thesame way with Discovery.See publication PP2031.

MAINTENANCEOF DETECTORS

Apollo Fire Detectors haspublished a guide to thecare, maintenance andservicing of Apolloproducts, PP2055, whichis available on request.This guide outlines themaintenance routinesrecommended for optimumdetector performance andthe services available fromApollo’s factory-basedService Department.

ISOLATORS

All XP95 isolators and isolating bases are patented and aresuitable for use with Discovery detectors and manual call points.

These are:

Product Part no LiteratureIsolating base 20D 45681–321 PIN sheet PP2039Isolator 55000–700 Product guide PP1039Base for isolator 45681–211 Product guide PP1039

MECHANICALCONSTRUCTION

All detectors in theDiscovery range have thesame external dimensions,except the multisensordetector, which is deeper.The housing of theionisation and opticalsmoke detectors is identical.

The material used to mouldthe housings is a UL 94 V–0grade of polycarbonate in apure white finish.

Two light-emitting diodes(LEDs) are mounted on theprinted circuit board withinthe housing. They protrudethrough the lid to be easilyvisible and provide externalalarm indication.

The LEDs of the ionisationsmoke detector and the heatdetector are red, and theoptical and multisensordetectors have colourlessLEDs which emit red light inthe alarm state.

All detectors in theDiscovery range have fournickel-plated stainless steelwipers at the back of thehousing which makecontact with the doubleterminals when the detectoris fitted to a base.

INTER-CHANGEABILITY

Any Discovery detector maybe replaced by any othertype in the range. Forexample, if a smokedetector proved unsuitablein a particular application, itcould be simply replacedwith a heat detector set tothe appropriate grade orrange, provided that themaximum floor areacoverage does not exceedthat specified by BS5839:Part1 or other local code.

Discovery detectors canalso be used to replaceXP95 detectors and again, itis possible to change types,e.g. smoke for heat or viceversa when mixing types.Factory-new Discoverydetectors are set to midrange, equivalent to XP95,and the flashing LED featureis disabled.

Note: the control andindicating equipment mustnot have a drift compensationalgorithm activated wheninterrogating Discoverydetectors.Some XP95 panels may notrecognise the multisensor orCO detector type codes.Contact the panelmanufacturer for advice.

APPLICATION OF DISCOVERY DETECTORS

The process of designing a fire detectionsystem using Discovery detectors is the sameas that used for any other detector range,except that Discovery offers more choices tothe system designer. The principles set out inrelevant codes of practice such as BS5839:Part 1 should be followed in any systemdesign. The notes below are intended tosupplement the codes of practice and to givesome specific guidance on the choicesavailable with the Discovery range.

Choice of Detector TypeThe choice of detector fromthe Discovery range followsthe well-establishedprinciples of system design.That is, the optimumdetector type will depend onthe type of fire risk and fireload, and the type ofenvironment in which thedetector is sited.

For general use, smokedetectors are recommendedsince these give the highestlevel of protection. Smokedetectors from the Discoveryrange may be ionisation,optical or multisensor types.It is generally accepted thationisation types have a highsensitivity to flaming fireswhereas optical detectorshave high sensitivity tosmouldering fires. As a resultof this, ionisation types arewidely used for propertyprotection, and optical typesfor life protection. Thesegeneral principles still applyto the Discovery detectors,although the availability of amultisensor in the Discoveryrange offers more choice tothe system designer.

The multisensor is basicallyan optical smoke detectorand will therefore respondwell to the smoke fromsmouldering fires. Inresponse modes 1, 3 and 4,however, (ie, in themultisensor modes) thedetector also senses airtemperature. Thistemperature sensitivityallows the multisensor togive a response to fastburning (flaming) fires whichis similar to that of anionisation detector. Themultisensor can therefore beused as an alternative to anionisation detector while stillretaining the benefits of anoptical smoke detector.

Where the environment issmoky or dirty under normalconditions, a heat detectormay be more appropriate. Itmust be recognised,however, that any heatdetector will respond onlywhen the fire is wellestablished and generating ahigh heat output. TheDiscovery heat detector canbe used in a wide range of

DISCOVERY

Ionisation Optical Multisensor Heat CO

Overheating/thermal decomposition Poor Very good Very good Very poor Very poor

Smouldering/glowing combustion Moderate/Good Good Good Very poor Excellent

Flaming combustion Very good Good Good Poor Poor

Flaming with high heat output Very good Good Very good Moderate/good Moderate

Flaming – clean burning Poor Very poor Moderate/good Moderate/good Very poor

Table 6 Relative performance of detectors in test fires

APPROVALSDiscovery detectors comply with EN54-5:2000 andEN54-7:2000. Detectors also comply with EMCDirective 89/336/EEC and are CE marked.

Discovery detectors have been approved by severalapproval and regulatory bodies woldwide, includingLPCB in the UK, VdS in Germany, DBI in Denmarkand SSL in Australia.

PATENTS HELDProtocol interrupt systemAddressable isolatorsAddressable XPERT card

It follows, then, thatDiscovery detectors set tomode 1 will be mostsuitable for environments inwhich sources of unwantedalarms are rare. Suchenvironments includecleanrooms and computersuites. At the other extreme,response mode 5 will besuited to more dusty orsmoky environments suchas loading areas wherediesel forklift trucks areoperating. Response mode3 is a general-purposesetting for which theresponse is similar to that ofthe corresponding XP95detector.

It will be seen, then, that it isoften more useful to think ofparticular response modesbeing suited to differentenvironments rather thansimply having differentsensitivity to fire. Table 7shows response modes forDiscovery detectors that are

considered suitable fordifferent environment types.Any of those identified assuitable should giveacceptable performance.The recommendeddetector/mode combinationswill give the best availableperformance fromDiscovery.

Time-related systemsDiscovery detectors areparticularly useful forinstallations in which it isdesirable to set differentdetector responsecharacteristics at differenttimes of the day because ofchanges in the environment.For example, if an industrialprocess generates smoke orfumes during working hoursand the area is clean atother times the optimumresponse mode will bedifferent at different times ofthe day. Outside workinghours the sensitivity can beswitched to a higher level to

conditions by selecting thecorrect mode (see Table 7).

The relative performance ofthe four detector types fordifferent fire types is given in Table 6.

Choice of Response ModeA major objective indesigning a detection systemis to achieve the bestdetection performance whilekeeping the number ofunwanted alarms at a lowlevel. Unwanted alarms arenormally caused byenvironmental influences.For any given environment,unwanted alarms will, as arule, be more frequent fordetectors of highersensitivity.

It has already been pointedout that the response modesfor Discovery detectorscorrespond to differentsensitivity to fire, withresponse mode 1 beingmore sensitive than mode 5.

maintain maximumprotection.

The Discovery multisensoris especially suitable fortime-related systems.Because its response can beswitched from a pure heatresponse to a sensitivemultisensor smokeresponse, it can beoptimised for very clean ordirty (smoky) environments.However, if mode switchingbetween heat and smoke (ormultisensor) modes is used,it is important to rememberthat the area coverage in theheat-only mode is half thatof the smoke or multisensormodes.

The detector spacing musttherefore be based on theheat detector spacing of therelevant standard.

Table 7 Discovery Response Mode Selection Grid

1

S

Mode

MULTI

OPTICAL

ION

CO

HEAT

Recommended

Suitable

Suitable as supplement

KEY

2 3 4 5

CleanroomEDP suite

1 2 3 4 5

Hotel room;Studio apartment;

small flat(<50m2)

1 2 3 4 5

S

Office;Long Corridor;Hospital wards;Light industrial

factory

1 2 3 4

S S

5

Warehouse;Bar

1 2 3 4 5

Loading bay;Car park

(enclosed &ventilated)

1 2 3 4 5

Kitchen;Laundry

1 2 3 4 5

Boiler room

APOLLO FIRE DETECTORS LIMITED

Apollo Fire Detectors Limited is part of the Halma plc group ofcompanies and one of the world's leading manufacturers ofconventional and analogue addressables smoke and heat detectorsfor commercial and industrial applications. Our products are soldin over 75 countries and we have won 3 Queen's Awards forExport Achievement.

Our detectors hold product approvals worldwide and the companyis quality certificated to ISO 9001 by the LPCB.

The company's premises are located in Havant on the south coastof England.

page 24

Quality Systems Certificate No 010Assessed to ISO 9001

Information in this guide isgiven in good faith, butApollo Fire DetectorsLimited cannot be heldresponsible for anyomissions or errors. Thecompany reserves the rightto change specifications ofproducts at any time andwithout prior notice.

PP2052/2001/Issue 3

36 Brookside Road, Havant, Hampshire PO9 1JR, England. Tel: +44 (0)23 9249 2412. Fax: +44 (0)23 9249 2754. Email: [email protected] Website: www.apollo-fire.co.uk

Apollo GmbH, Gneisenaustr IIA, 33330 Gütersloh, Germany. Tel: +49 5241 33060. Fax: +49 5241 330629Air Products and Controls Inc., 1749 E Highwood, Pontiac, MI 48340, USA. Tel: +1 248 332 3900. Fax: +1 248 332 8807

Quality Systems Certificate No 010Assessed to ISO 9001

pp2052

Documents

printed circuit

peak quiescent

42mm height

base 105g

manual call

call point

1ma maximum

forward command