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e1276e

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Siemens Building T

echnologies

Cerberus Division

09.2000

3

Design and principle of operation

3.1

Detector

Special filter

Connector adjustment device

Programming switch

Detector heater terminal

Locking screw

Knurled screw

for vertical adjustment

Knurled screw
for horizontal adjustment

Locking screw

Reed contact (initialization)

Response indicator

Receiver lens

Transmitter lens

#

#

##

##

#

##

#

#

Sighting device

Sighting device (foresight)

(mirror with backsight)

Fig. 3

Detector

3.2

Structure of the infrared beam

The infrared beam emitted by the transmitter to the reflector is not a strictly parallel bundle
of rays. It exhibits a certain degree of scattering which makes it conical in shape. The radi-
ation energy decreases towards the outside, so that the beam can be divided into the
three effective, core and scattered regions. The reflector possesses the characteristic to
retransmit the received light.

Effective region

Core region

Scattered region

DLO

DLR

Fig. 4

Structure of the infrared beam

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Содержание Cerberus DLO1191

Страница 1: ...rus DLO1191 Linear smoke detector Technical description Planning Installation Commissioning Siemens Building Technologies Cerberus Division Manual DS11 Section 3 Cerberus Security for People and A s s e t s ...

Страница 2: ... e p t a n c e o f t h e d o c u m e n t t h e r e c i p i e n t a c k n o w l e d g e s t h e s e r i g h t s a n d u n d e r t a k e s n o t t o p u b l i s h t h e d o c u m e n t n o r t h e s u b j e c t t h e r e o f i n f u l lo ri np a r t n o r t o m a k e t h e m a v a i l a b l e t o a n y t h i r d p a r t y w i t h o u t o u r p r i o r e x p r e s s w r i t t e n a u t h o r i z a t ...

Страница 3: ...Examples of suitable fields of application 18 4 3 2 Examples of unsuitable fields of application 18 4 4 Monitoring areas with flat ceilings 19 4 5 Monitoring areas with sloping ceilings 19 4 5 1 Additional DLO1191 s on the slope of the ceiling 19 4 6 Monitoring areas with joist constructions 21 4 6 1 Layout underneath joist construction 21 4 6 2 Layout within the joist area 21 4 6 3 Detection of s...

Страница 4: ...ettings 32 6 2 Mechanical adjustment 33 6 3 Electronic alignment 34 6 4 Initialization 35 6 5 Addressing in the interactive system 35 7 Faults overhaul 36 7 1 Fault 36 7 1 1 Interruption to beam 36 7 2 Reflection 36 7 3 Checklist for trouble shooting 36 7 4 Functional check overhaul 37 8 Terminology 38 ...

Страница 5: ...of four function states normal information impairment fault Automatic digital compensation of ambient influences High immunity to extraneous light Transmitter and receiver installed in the same housing Easy installation adjustment and commissioning Two wire installation Comprehensive accessories New diagnostic capabilities with fuzzy logic Efficient signal processing algorithms with application sp...

Страница 6: ...0m Reflector foil DLR1193 10 x 10cm 1 pc 30 to 50m Reflector foil DLR1192 20 x 20cm 1 pc 50 to 65m Reflector foil DLR1192 20 x 20cm 4 pcs 20 to 100m Prism made of glass DLR1191 cat s eye 1 pc with built in heating against condensation Short distance filter For shorter distances between 5 and 10 m an additional short distance filter is required 5 to 8m DLF1191 AB 7 to 10 m DLF1191 AA Filter against...

Страница 7: ...eceiver Transmitter Measuring section Reflector Detector Fig 1 Linear smoke detector without smoke If smoke penetrates the measuring section part of the light beams is absorbed by the smoke particles while another part is scattered by the smoke particles i e the light beams merely change direction The remaining light reaches the reflector The remaining light is then reflec ted and once again passe...

Страница 8: ... current at Ub 24V IA mA 40 75 Reset voltage UR V 2 6 Reset current IR µA 5 500 Reset time UR 2V tR s 2 Response indicator Voltage Current Flashing frequency Uie Iie V mA Hz 3 1 6 60 100 permanent pulsed f 0 5Hz Duty Cycle 50 depending on line module Connection factor KMK 25 maximum 1 detector per detection line 2 2 Interactive Mode Value Parameters Symbol Unit min typ max Conditions Operating vol...

Страница 9: ...requency Pulse length nm Hz µs 880 6 25 Attenuation of the beam Elektromagnetic compatibility V m 50 1MHz 1GHz Operating temperature Ta C 25 60 Humidity 30 C 30 C 95 rel 29g m3 Storage temperature Tl C 30 75 Colour pure white RAL9010 Detector heater DLR1191 DLH1191 Supply voltage UH VDC 20 30 Operating current IH mA 33 50 Resistance R Ω 600 Classification Standards BS 5839 Part 5 CE conformity mar...

Страница 10: ...ting device Sighting device foresight mirror with backsight Fig 3 Detector 3 2 Structure of the infrared beam The infrared beam emitted by the transmitter to the reflector is not a strictly parallel bundle of rays It exhibits a certain degree of scattering which makes it conical in shape The radi ation energy decreases towards the outside so that the beam can be divided into the three effective co...

Страница 11: ...ontal direction and each 5 in vertical direction from the centre axis When selecting the optimum mounting location bear in mind that this adjustment range can be fully used Experience has shown that the detector and reflector should be arranged as parallel as possible especially with distances of 50m as this makes adjustment simpler Diameter o ft h e cor e r egion ÈÈ ÈÈ ÈÈ ÈÈ ÈÈ ÈÈ ÈÈ ÈÈ ÈÈ ÈÈ È È...

Страница 12: ...prism has the shape of a pyramid whose lateral faces are formed by isosceles orthogonal triangles Light beams entering through the base are completely re flected twice on the lateral faces and reflected back through the base The prism is installed in a housing that is identical to the one used for the detector base The reflector is equipped with a reflector heater at the factory If dew condensatio...

Страница 13: ... and status signals back to the control unit With the help of the isolation function sections which malfunction are isolated so that in the event of a short circuit the entire bus line does not break down Upon short circuit two electronic switches FET open automatically and isolate the line in the area where the malfunction has occurred until the short circuit has been eliminated The internal resp...

Страница 14: ...anger level 1 possible danger Danger level 2 probable danger Danger level 3 highly probable danger Danger level 1 For early warning where installation locations are critical the number of times the thresh old to danger level 1 is exceeded is counted by the control unit When the counter reaches a preset value an information application warning is displayed This information is reg istered in the eve...

Страница 15: ...nt e g compensation value too high too low voltage at reservoir capacitor is too low Functional state 3 corresponds to Fault e g data fault in the EEPROM beam interruption compensation value is invalid 3 8 General detector functions 3 8 1 Alarm algorithms Compensation value The compensation value NFW is the reference variable for the actual measurement sig nal All thresholds diagnostic functions a...

Страница 16: ...d 3 50 response threshold 3 65 response threshold 3 low high standard NFW Compensation value Smoothing The measuring signal is measured with a 6Hz clock The raw data are processed with so called smoothing filters for subsequent evaluation In this way extreme peak values caused by signal interference are smoothed An alarm is triggered based on the smoothed signals Time Raw data Smoothing Counts ...

Страница 17: ...ed by means of the corresponding danger level These le vels are not evaluated in the collective system If the smoothed signal reaches response threshold 3 the alarms in the alarm counter are added up Upon reaching the given value danger level 3 i e an alarm is activated According to the diagnosis made other alarm parameters are automatically selected Diagnosis Fire or slowly developing fire alarm ...

Страница 18: ...are treated by 4 different filters Each filter assesses a special cha racteristic of the signal Gradient noise asymmetry jump Filter Typical events and results for the 4 filters Time U Raw data Fire Time Gradient indicator G Thermal turbulence Time U Raw data Time R Noise indicator Repeated interruptions Time U Raw data Time A Asymmetry indicator Test filter Time U Raw data Time S Jump indicator ...

Страница 19: ...thed signals are combined with fuzzy logic A diagnosis is prepared automatically and on line Principle of the fuzzy logic Gradient Noise Signal Fuzzification Regulating Defuzzification Jumps Asymmetry Signal Condensation Beam EMI Test filter interruption Modification of alarm criteria Diagnosis misapplication warning ...

Страница 20: ...c interference EMI Thermal turbulence points to powerful air circulation This is mainly caused by air hea ters baking ovens furnaces etc Thermal turbulence and or powerful electromagnetic interference generate noise which is filtered out by the algorithms However if it exceeds a certain strength and dura tion it can still lead to detector impairment Possible remedy Remove detectors from such an en...

Страница 21: ...midity variations wind or snow pressure influence such constructions The monitoring beam must have free view at least 30cm on all sides so that no un wanted reflections develop Frontal incidence of sunlight light from halogen lamps etc on the DLO1191 should be avoided if possible to high temperature For the service staff the detector must be at any time well accessible Cleaning and adjusting works...

Страница 22: ...and high halls Lower capital investment Churches No impairment of the ceiling by installation and point type detectors Long corridors cable and energy ducts with 3m room height Lower capital investment Aircraft hangars with sturdy building construction and flame detectors alone are insufficient Lower capital investment Sawtooth roofs where point type detectors must be lower suspended Lower capital...

Страница 23: ... Detector layout in areas with flat ceilings 4 5 Monitoring areas with sloping ceilings To be defined as sloping a ceiling must have an angle of inclination of at least 11 which corresponds to 20cm m With gable roofs which have a slope of 0 5 always ar range a monitoring beam in the gable area Example Calculation of the slope n 4 5 1 Additional DLO1191 s on the slope of the ceiling The number of D...

Страница 24: ...ances determined by height of room When the sides of the roof are un equal the unit must be displaced from the centre towards the less steep side Fig 14 Positioning underneath unequal sloping ceilings With sloping ceilings the smoke is channelled into the gable i e there is an increased smoke concentration in this area Therefore the monitoring width per DLO1191 can be increased according to sectio...

Страница 25: ...ht of the room If the width of the inter joist area is 50 of the maximum broad of surveillance or if the inter joist area is 200m2 When calculating the width of the monitored area that only the distance up to the joist construction counts as the height of the room h h Height for determining max width of monitored area 100 h 20 min 30cm Fig 15 Detector layout underneath joist construction 4 6 2 Lay...

Страница 26: ... of smouldering fires in high rooms on different levels Examples Room height highest level lowest level intermediate level 6m 12m 20m 3 4m 6 7m 6 7m 12m 4 7 Guideline for distances between DLO1191 and reflector Distance DLO1191 à reflector Types and number of reflectors 5 10m 10 30m 30 50m 50 65m 20 100m Short distance filter 1 DLR1193 1 DLR1193 1 DLR1192 4 DLR1192 1 DLR1191 If a number of reflect...

Страница 27: ...nd can reflect the beam back to the re ceiver angle of incidence angle of reflection 3 As much as possible penetrate only one pane of glass Maximum 2 panes of 5mm glass may be penetrated 4 Each pane of glass reduces the distance by 20m 5 The detection is certain if the signal decreases to 2 when the reflector is covered see section 6 3 electronic alignment DLO DLR E S Pane of glass Partial light s...

Страница 28: ...xample for the penetration of panes of glass 4 8 3 Reflectors mounted on glass walls If reflectors are mounted on glass walls there is a danger that the glass and not the reflec tor will reflect the beam This situation may only occur after commissioning if the glass wall moves slightly However it does not occur if the beam strikes a glass wall at an angle greater or less than 90 Recommendation In ...

Страница 29: ...en DLO1191 and reflector Distance DLO11 and reflector 100 80 60 40 20 0 1 2 3 4 5 6 m m Fig 20 Min distance between two parallel IR beams 4 10 Beam spacing from the ceiling In order that the IR beam can detect the smoke it is normally mounted immediately be neath the cushion of warm air The higher the room the further away the DLO1191 and the reflector should be mounted from the ceiling 0 3 0 5 1 ...

Страница 30: ...ed risks a narrower monitoring width can be chosen 4 12 Measures for dividing long distances DLO DLO DLR DLO1191s can negatively influence each other if mounted face to face In such an ar rangement a sufficiently large plate must be mounted between the reflectors 4 13 Measures against condensation If the DLO1191 or the reflector is mounted on cool outside walls in rooms in which high humidity and ...

Страница 31: ...ons include the walls of rooms constructed of steel which expand and contract due to the tempera ture coefficient of steel masonry walls on which a steel roof has been constructed In such cases the DLO1191 must be mounted on the rigid structural element meanwhile the reflector can be mounted on the instable wall Reflector incorrect DLO11 0 43 28 8mm 3 83m Roof length 80m Fig 23 Deflection of the I...

Страница 32: ...e easily accessible also in high halls for commissioning and servicing Suitable equipment for this purpose includes fixed ladders catwalks etc or safe mobile equipment such as stacker trucks sky workers etc Fig 25 Difficult and dangerous work using a ladder Fig 26 Precise and safe work using a permanent platform ...

Страница 33: ...ng and other ob stacles at least 30 cm 153 5 135 135 4 5 Base DLB1191 45 PG16 115 Detector module DLA1191 Mounting plane DLO1191 Response indicator always at the bottom Fig 27 Installation of the DLO1191 Mounting plane DLR1191 Reflector heating must be mounted beneath Reflector DLR1191 45 65 PG16 153 5 135 135 4 5 Fig 28 Installation of the DLR1191 reflector ...

Страница 34: ... 7 10m DLF1191 AA 5 8m DLF1191 AB In the event of influence from external light insert the corresponding filter DLF1191 AC not possible if short distance filter is inserted Special filter Fig 29 Insertion of special filter 5 2 2 Detector heater In the event of danger of condensation the installation of the detector heater is recom mended Note Supply voltage 24V necessary A terminal block is suppli...

Страница 35: ...active mode Auxiliary supply for detector heater option 24V Response indicator _ Y X W V _ Z MB DLB1191 Detector bus MB IRED pulse signal for adjusting the lenses during detector production Z auxiliary terminal Fig 31 Connection diagram for interactive mode Connection diagram collective mode MB IRED pulse signal for adjusting the lenses during detector production Z auxiliary terminal Detection lin...

Страница 36: ...with DIP switch S3 The DIP switch S3 which governs the transmitter intensity is set to strong by default If the signal amplitude is too high display on the adjustment unit Range 13 signal 50 the transmitter can be set to weak If the measurement section is 10m a supplemen tary filter must be installed Function S1 S2 S3 S4 S5 S6 Reduced sensitivity OFF ON Standard sensitivity ON OFF ON OFF Increased...

Страница 37: ...ector side or illuminating the reflector with a spotlight simplifies the rough adjustment procedure Switch on the detection line Connect the adjustment unit to the detector Attention At first use insert a new battery Switch the adjustment unit to ON and AUTO RANGE The correct range will be measured automatically When the mechanical adjustment is correct a signal 2 should be available on the ad jus...

Страница 38: ...just the range and then re adjust to the maximum value SIGNAL The RANGE and SIGNAL indication on the adjustment device should both be at tain a maximum value If Range is 13 and Signal 60 the transmitter signal switch S3 must be set to weak Engage the locking screws Switch the adjustment set to FIX RANGE Cover the reflector With a dark cover interrupt the IR beam the signal should decrease to 2 If ...

Страница 39: ...e indicator flashes the compensation value is formed approx 30 sec During this time the measurement should not be interfered with No manipulations on the detector and no interruption of the IR beam When the initialization is completed the AI turns off If any procedural error has been made a new initialization can be started at any time with the magnet Test alarm with test filter Place the test fil...

Страница 40: ...ing objects are to be avoided These can lead to inadver tent alarms or disturbances 7 2 Reflection If a specular surface comes too close to the measurement section or near the detector a reflection can occur Reflections can lead to an amplified signal This can cause unwanted faults with both systems interactive collective 7 3 Checklist for trouble shooting Is the building structure stable Is the d...

Страница 41: ... respond or which are mechanically damaged must be re placed If an information or fault signal is transmitted during operation the status bits in the EEPROM of the detector can be read out with the service computer A preliminary diag nosis on the cause can be established based on this information All detector hoods and reflectors should be cleaned regularly with a soft piece of cloth which is eith...

Страница 42: ...ntrol unit for the S11 fire detection system DIP switch Microswitch DLO1191 Linear smoke detector EEPROM Electrically Erasable and Programmable Read Only Memory EMC Electro Magnetic Compatibility EMI Electro Magnetic Influence FET Field Effect Transistor Fuzzy logic Imprecise logic IMK Load factor for interactive elements IR Infrared IRED Infra Red Emitting Diode KMK Load factor for collective ele...

Страница 43: ...Back_e 39 Siemens Building T echnologies Cerberus Division 09 2000 ...

Страница 44: ... e1276d Doc no Edition Replaces 09 2000 Siemens Building T echnologies Cerberus Division Siemens Building T echnologies AG Cerberus Division CHĆ8708 Männedor f Alte Landstrasse 411 T el Fax www cerberus ch 41 1 922 61 11 41 1 922 64 50 Cerberus Security for People and Assets ...

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