Siemens Cerberus DOT1151A-Ex Technical Description

Cerberus® DOT1151AĆEx
Neural smoke detector, interactive,
intrinsically safe

Technical description

Fire & Security Products

Siemens Building Technologies Group

Data and design subject to change
without notice. / Supply subject to
availability.
E Copyright by
Siemens Building Technologies AG

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1 Overview 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 Characteristics 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Design 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Technical data 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 Algo-Parameter sets for DOT1151A-Ex 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Design 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Principle of operation (see block diagram Fig. 3) 7. . . . . . . . . . . . . . . . . . . .

5 Self-test / function state 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 Emergency operation 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 Response characteristics of the detector 9. . . . . . . . . . . . . . . . . . . . . . . . . . .

8 Environmental influences 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.1 Influence of the ambient air temperature 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.2 Other influencing variables 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9 Application 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9.1 Compatibility 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9.2 Adjustment functions / selection of parameter sets 10. . . . . . . . . . . . . . . . . . . . . .

9.3 Application 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9.4 Wiring 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10 Commissioning 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11 Maintenance 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11.1 Diagnostic possibilities 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11.2 Functional check / overhaul 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12 Terms 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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1 Overview

1.1 Characteristics

Dimensions

Ø 115

47...70

63

incl. base DB1151A

D For application in explosion-hazard areas of zones 1 and 2
D Homogenous response behavior across a wide application spectrum

through freely programmable percentages of smoke and heat

D Efficient signal processing algorithms with downloadable, application specific

characteristics

for optimum detection reliability

D High-quality sensor system with temperature compensation

functions reliably also under critical environmental conditions

D High contamination resistance

through appropriate design of the measurement chamber, the protective grille
and automatic, continuous digital compensation

D Comprehensive EMC concept based on the latest technology

allows installation also in difficult environments

D Integrated multiple coincidence circuit

suppresses extreme electrical and optical interference signals

D State-of-the-art, microprocessor-controlled electronics
D Transmission of 4 different danger levels and function states each
D Automatic, comprehensive self-test

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1.2 Design

The PolyRex detector DOT1151A-Ex is installed in a modern, attractive, impact-resistant
plastic housing that fits unobtrusively into any room architecture. The detector is secured in
the DB1151A base with a vibration-proof bayonet fitting. Except for the identification mod­ule that defines the installation location at the time the system is commissioned, the base
does not contain any electronic components.
The detector is equipped with a response indicator (red LED) to indicate alarm. Activated
from the control unit, the response indicator can also be programmed to provide informa­tion for servicing purposes. Each detector is equipped with an output for connecting an ex­ternal response indicator. This indicator is normally assigned to the connected detector but
it can also be assigned programmatically to any detector within the same object.
The detector is fully electronic and has no wearing parts. As protection against environ­mental influences the electronic circuitry is shielded and the circuit board is coated with a
special protective varnish. For periodic factory overhaul the protective hood and grille can
be removed.
In explosion-hazard rooms the DB1151A detector base is mounted on the ceiling direct by
means of the recess box, or surface-mounted together with the DBZ1191 base attachment
and connected to the control unit with twin wire via a shunt Zener diode barrier and possibly
other devices. The base has spring terminals for connection.
Efficient installation, removal and testing of a detector is possible by means of the DZ1191
detector extractor and the RE6 testing unit. If an extension tube is used, work up to a ceiling
height of 7m can be performed without any further tools. A comprehensive range of base
accessories is available for special applications such as installation in humid environ­ments, protection against unauthorized removal, etc.

IMPORTANT!
The DZ1193 optoelectronic detector tester and exchanger and the RE6T heat
detector tester may not be used in explosion-hazard areas!

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2 Technical data

Normal ambient conditions, if nothing else is specified:
Temperature T
Air pressure: p = 1’000hPa (750 Torr)

Parameters Symbol Unit min. typ. max. Conditions

Operating voltage U
Operating current

(quiescent condition)
Capacity

Detection line
Response indicator line

Inductance

Detection line

Response indicator line
Baud rate kBd 4.8
Response sensitivity

(software setting dependent on
algorithms)

Compensation
Compensation speed

Self test interval min. 15
Response indicator:

Flashing interval times: bright
Response indicator current

Elektromagnetic compatibility E

Operating temperature T
Humidity ≤34°C

Storage temperature T
Connection factor for interactive

elements

Colour: white ~RAL9010

>34°C

dark

b

I

b

C
C

L
L

D

1

E

a

rF

abs. F

l

IMK 1

Classification Standards for explosion-hazard areas:

Standards EN 54-7
Application category IEC 721-3: 3K8H EN50014

Ex classification EEx ib IIC T4 (–25°C ≤Ta ≤70°C )
Test category IEC 68-1: 25/070/42
Protection category EN60529 / IEC529: IP44

Ex approval DOT1151A-Ex:

PTB Nr. Ex-99.E.2154

Environmental compatibility:

– Easy to uninstall and disassemble
– Halogen-free plastic material identifiable through embossed code

Intrinsic safety:

Intrinsic safety «i» when using a certified shunt Zener diode barrier with the following data:

Riw 280Ω
Uiv 28V
I

v 100mA

i

Piv 700mW

=20°C (293K)

a

Value

V 18.5 28 modulated

µA 300 ≤350

nF
nF

mH

µH

%/m 1.3 6.6 smoke sensitivity with paraffin

Voltage increase

for detection

Voltage increase

for detection/h

ms

s

mA

V/m
V/m

°C –25 +70

%

3

g/M

°C –30 +75

50
30

20

1.5
9

EN50020

1

≤33

–

≤40

2

1 / 64

≤95
≤35

test aerosol

depending on control unit

1MHz...1GHz
1GHz...2GHz

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2.1 Algo-Parameter sets for DOT1151A-Ex

APS083S

Parameter set Operating state

present

APS083S

2) 3)

!

APS005S

(Default)

APS082S

APS015S

APS015S

APS006S

APS006S

APS085S

APS085S

APS084S

2) 3)

!

APS009S

APS009S

APS019S

APS019S

APS007S

APS007S

APS081S

APS081S

APS080SH

1) 2)

!

Test mode

absent
special no response to smoke (only temperature

present

absent
special no response to smoke (only temperature

present

absent
special no response to smoke (only temperature

present

absent
special no response to smoke (only temperature

present

absent
special no response to smoke (only temperature

present

absent
special no response to smoke (only temperature

present

absent
special no response to smoke (only temperature

present

absent
special no response to smoke (only temperature

present

absent
special no response to smoke (only temperature

present

absent
special no response to smoke (only temperature

present

absent
special no response to smoke (only temperature

present

absent

AlgoRex smoke sensitivity index (1)

Response time

Without temperature

influence

for danger level 3 with

smoke

1.3

1 2 110

for China only: Similar as APS005S, but thermal behaviour changed according
to chinese standards.

1 2 85

1 2.5

1.4 4.3

1.5 2 240

2 4 110

2 4 85

2 5

4 8 *

5.5 12 15

2 5 5

With full temperature

influence

3.5 60

3.5 60

actuation)

actuation)

actuation)

actuation)

actuation)

actuation)

actuation)

actuation)

actuation)

actuation)

actuation)

when testing with

test gas (~seconds)

60
40

75
45

60
40

60
30

With the exception of test mode, the parameter sets listed here are arranged in order of
sensitivity (APS080SH is the most sensitive).
* Comment: Slightly corrected values compared to those noted in the help of

AlgoWorks EP5 (SR1) update 2.

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Note: all values are approximative !
Smoke sensitivity: To simplify the comparison of smoke sensitivities between the

parameter sets, we are specifying an AlgoRex smoke sensitivity index for danger level 3.
Please note, that this index is a relative figure, where ”2” means an increased sensitivity by
a factor of 2 (compared to the parameter set with index ”1”); therefore the detector will alarm
at half the smoke density if measured in the CEN smoke tunnel acc. to EN54.
An AlgoRex smoke sens. Index of ”0” means ”no alarm with smoke only”.

Important: The parameter sets APS083S, APS084S and APS080SH must only be ap­plied for special applications!
APS080: Caution, low security against false alarm! Parameter set with very high sensitivity
and extreme fast reaction time.
APS083: In mode ”present”, detection of smoke without temperature rise will not lead to a
danger level 3. This behaviour is outside the standard EN54–7; in mode ”absent”, EN54–7
is fulfilled.
APS084: This parameter set prevents nuisance alarms due to short and single nuisance
signals. Long or multiple events may lead to danger level 3.

1)

The detector DOT1151-Ex with APS080SH can have a slightly lower electromagnetic

compatibility (APS081S passed EMC tests in the meantime).

2)

Not available for temporary change of detector parameter set on CT/CI due to further

risks in application.

3)

IMPORTANT NOTE regarding APS083 and APS084 (see info MI290):
Unfortunately there has been a mistaken parameter value in detector DOT1151A Index
”ke”; however, this mistake only a ffects behaviour in parameter sets 083/084. As a result,
the detector may not be able to go into alarm on reasonable smoke density!

--> You must never choose APS083 or APS084 with a detector DOT1151A with Index ”ke”!

As a simple rule of thumb, only use APS083 or APS084 with detectors DOT115x with
Technical Index ”_f” or later.

Detectors DOT1151A-Ex are not concerned by this fault.
The Index is shown on the detector label as two letters following the part number (e.g.
DOT1151A: ”P/N 486695 ke”); first letter means ”Schematic Index”, second letter means
”Technical Index”. Both are in alphabetical order.

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Light source

3 Design

The heart of the PolyRex detectors DOT1151-Ex is a high-quality opto electronic measure­ment chamber that screens off extraneous light but optimally detects light-colored and dark
smoke particles. The light source, the light stop and the light receiver are arranged in such a
way that the light from the source cannot directly reach the receiver (Fig. 1 and Fig. 2). Only
when smoke particles are present in the optical path does some of the scattered light reach
the receiver and produce an optical signal.
The temperature sensor (NTC) is located in the detector dome.
Due to its optimized optical system, the temperature sensor installed in a protective jacket,
shielded electronics and special circuit board coating this detectors are highly immune to
environmental influences such as temperature, humidity, corrosion and electrical interfer­ence fields.
Intrinsically safe detectors are marked with the model number and the Ex label.

Light receiver

Light stop

Transmitter optics

Fig. 1 Principle of the scattered light measurement

Labyrinth

Smoke particles

Section A - A’

Smoke particles

A’

Light source

Labyrinth

Light stop

Light receiver

A

NTC temperature sensor

Fig. 2 Detector design

6

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4 Principle of operation (see block

diagram Fig. 3)

The PolyRex detector DOT1151-Ex measures the smoke density as well as the ambient air
temperature. The temperature sensor signal can be evaluated either differentially and/or
absolute. The smoke sensor sensor is based on the principle of light scatter. An infrared
LED (IRED) transmits brief, intensive light pulses into the scattering chamber. The receiv­ing element «sees» the scattering chamber but not the transmitter. The smoke that has
penetrated into the chamber scatters the light beam produced by the transmitter. A s a re­sult some of the light reaches the receiver. The generated receiver signal is processed by
the electronic circuitry.
The microprocessor (µP)
forms the signal processing, and classifies the events into different danger levels and func­tion states. Also the communication with the control unit is controlled by the µP. Numerous
detector characteristics are stored in the non-volatile µP memory (255 Byte EEPROM).
These can be read out and modified at any time by authorized specialists. The content of
the non-volatile memory is checked automatically in intervals of approx.15 minutes.
The sensor specific functions are implemented in the application-specific integrated circuit
(ASIC)

2

. Centrally located is the sequence control 3. It produces, among other func-

tions, a current pulse in light transmitter

12

produces a signal current if smoke penetrates into the sensor chamber.
This current is amplified and integrated in integrator
very selectively passes only signals of the correct frequency and phasing (interference sig­nal suppression). The sample/hold stage
til the µP has read the value. The Level Check unit
amplification. Gain Control
ity setting. On request the test unit
overall gain of the signal path can be monitored (part of the self-test).

1

controls the various measurement and test sequences, per-

13

which is monitored by the µP. The light receiver

4

. The multiple coincidence filter

6

further amplifies the signal and stabilizes it un-

7

monitors the signals for possible over-

8

is used for coarse alignment of the detector and the sensitiv-

9

transmits a test signal to the receiver input so that the

5

13

4 5 6

12

23

20

22 21

NTC

10

39

87

11

12 ASIC

µP

ADC
ADC

ADC I/O

14 LI

15

17

16

Detector

B
D

F

18

19

E

A
C

Base

Fig. 3 Block diagram DOT1151-Ex
All circuits are adapted to the standards for explosion-hazard areas.
The temperature drift of the optical module is compensated by temperature sensor
grated in the ASIC. By means of the multiplexer (MUX)

11

the µP 1 detects either the

smoke density or the temperature.

Shunt Zener
diode barrier
and control
unit

10

inte-

+

Detection line

–

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The external NTC temperature sensor 22 is controlled by circuit element 23. It contains cir-

21

cuit

, which produces the bias voltage for this NTC and is simultaneously controlled and

monitored by the µP. The signal from the NTC temperature sensor is taken via the filter

20

to
the A/C converter of the µP. This filter reduces electromagnetic interference and protects
the circuit against electrostatic discharges (ESD)
The µP
Through the data interface

1

communicates via the line interface 14 and the two-wire bus with the control unit.

15

the detector receives commands that activate the operating
modes, initiate diagnostic steps, etc. Response signals, results from diagnostic inquiries,
and status signals are transmitted by the detector back to the control unit.
To prevent total bus failure in the event of a short circuit, DOT1152 disconnector detectors
can be installed which «isolate» defective sections. In the DOT1152 disconnector detector
two «electronic switches» (FET)

16

open automatically in the event of a short circuit and
isolate the faulty section of the line until the short circuit is remedied.
The driver
an external RI

17

for the response indicators (RI) activates the blinking of the internal RI 18 and

19

under control of the control unit.

5 Self-test / function state

Periodically and on request by the control unit a comprehensive detector self-test is initi­ated which monitors the IRED current, the signal amplifier and the EEPROM.
Also periodically monitored are the compensation value, NTC, the line voltage, etc. The
entire signal path is monitored with the compensation value. If the basic pulse value is too
low, this condition is signalled.
If the detector signals a status change, the control unit can read the cause out of the detec­tor memory.
«Function state 0» corresponds to «Normal state».
In the «Normal state» the detector is fully functional.

«Function state 1» corresponds to «Notices».
«Notices» draw attention to certain irregularities, for example, error ID-ROM, but these do

not influence the correct functioning of the system.

«Function state 2» corresponds to «Impairment».
«Impairments» are not accurately quantifiable deviations of the system (for example, com-

pensation value too high). The reasons leading to the response of the detector must be
taken seriously.
«Function state 3» corresponds to «Fault».
A «Fault» is an impairment of such a serious nature that the response of the detector can no
longer be taken to signal a real event but the fault must be immediately remedied.

Upper limit value (function state 2)

Drift (function state 1)

Compensation range

Voltage in-

crease for

detection

Basic detection pulse, new condition
Lower limit value (function state 1)

Zero value

Fig. 4 Compensation range

8

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6 Emergency operation

If the PolyRex detector DOT1151-Ex can no longer be periodically addressed, for example
due to a µP failure in the control unit, the detectors switch automatically to emergency op­eration. In the event of a fire this detector can still trigger a collective alarm.

7 Response characteristics of the

detector

The PolyRex detector DOT1151-Ex is equipped with ef ficient algorithms for discriminating
between true fires and deceptive phenomena. To signal a danger level the detector does
not simply respond to a reading above a «response threshold», but rather tracks the smoke
density pattern over a longer period of time and evaluates it with appropriate algorithms.
The software parameters determine the response behavior of the detectors. They are de­pendent on the risk prevailing at the installation site (on the selected parameter set) and on
the activated operating mode (day, night, special [renovation], test and switched off).
The current operating mode is signalled to the detectors by the control unit in intervals of
approx. 3 seconds.
The algorithms contain, for example, filters for suppressing transient interference vari­ables. Slow changes caused by contamination are compensated by the automatic digital
compensation circuit. This extremely slow compensation ensures that also slowly develop­ing fires are reliably detected.

8 Environmental influences

8.1 Influence of the ambient air temperature

The smoke sensitivity of the PolyRex detector DOT1151-Ex typically changes typical
±10% across the entire operating temperature range.

8.2 Other influencing variables

The PolyRex detector DOT1151-Ex is resistant to ambient light, air drafts and other
changes within the specified data.
The influence of air drafts with fast and large temperature fluctuations depends on the se­lected parameter set.

9 Application

9.1 Compatibility

Fire detection system: S11 AlgoRex
Control unit: CC11 (E3M171)
Base: DB1151A

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9.2 Adjustment functions / selection of

parameter sets

On the detector itself there is no mechanical adjustments. All function changes are initiated
remotely by the control unit. The factory programs all detectors with a basic parameter set.
This ensures that each detector is fully functional when it is installed. The additional param­eter sets can be programmed in the field with the service PC by downloading them from the
control unit.

9.2.1 DOT1151A-Ex

Parameter set Risk exposure and influence Risk exposure

APS083S

!

APS005S

(foctory default)

APS082S

APS015S

APS006S

APS085S

APS084S

!

APS009S

APS019S

APS007S

APS081S

APS080SH

!

Low concentration of valuable property;
no direct danger to life;
No danger of smouldering fire!
Aerosols arise regularly and for a length of time in ”Manned”
mode. No simultaneous thermal influence. No or few aero­sols in ”Unmanned” mode.

Low to moderate concentration of valuable property;
no direct danger to life.
No ban on smoking.

––> Only for application in the China region in compliance
with Chinese standards;

––> As for APS005S, but with modified thermal response.
––> As for APS005S, but specially for applications at sea

level as it has a slightly faster reaction than APS005S.
Moderate concentration of valuable property;

no direct danger to life.
No ban on smoking.

Medium to high concentration of valuable property;
Person self-rescue is possible.
No ban on smoking; little thermal influence.

Low concentration of valuable property;
no direct danger to life;
low risk of smouldering fire.
Aerosols arise briefly at times without simultaneous thermal
influence.

High concentration of valuable property;
Person self-rescue is possible.
No ban on smoking.

––> As for APS009S, but specially for applications at sea
level as it has a slightly faster reaction than APS009S.

High concentration of valuable property;
Persons partly endangered.
Ban on smoking.

Very high concentration of valuable property;
Persons endangered.
Ban on smoking; no thermal influences.

Extremely high concentration of valuable equipment;
persons endangered.
Total ban on smoking, no other aerosols;
no thermal influences.

The parameter sets listed here are arranged in order of sensitivity (APS080SH is the most
sensitive).
For planning and project planning see «Application guidelines», document e1225, manual

DS11, section 10

The detailed clarification of the application is required! See notes in chapter 2.1!

!

Discotheques/dance halls, places of
entertainment with artificial smoke or
fog.

Caution, use very restrictively!

Industry, workshop halls,
diesel vehicle traffic, park garage,
restaurants, kitchen, smoking rooms

as for APS005S

as for APS005S
Offices, warehouses,

electric vehicle traffic,
congress centers.

Museums, warehouses, offices.

Special production areas with trans­ient and nonrecurring aerosols.

Caution, use very restrictively!

Storerooms, hotel rooms, home for
the elderly rooms, schools,
data processing and telecommuni­cation systems in clean environe­ment.

as for APS009S
Clean warehouses, museums,

archives,
data processing and telecommuni­cation systems in clean environe­ment.

Clean rooms, patient rooms,
museums.

Patient rooms, intensive care unit,
clean rooms.

Caution, use restrictively!

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9.3 Application

Due to its EN54 compliance the PolyRex detector DOT1 151-Ex can be used as an univer­sal detector. The recommended monitoring surfaces, detector spacing, etc. can be found
in the national guidelines, the Cerberus planning and application guidelines (CRP), or the
Security Guide.

9.4 Wiring

The DOT1151A-Ex detector and the DB1151A base are used in DS1 1-Ex with intrinsically
safe fire detection lines which consist of an E3M171 line module, a shunt Zener diode bar­rier and intrinsically safe detectors.
Non-Ex-detectors mayal so be installed before the shunt Zener diode barrier. After the shunt
Zener diode barrier only Ex detectors (DOT1151A-Ex, DT1151A-Ex, DM1153/54-Ex or
DF1151-Ex) may be connected. A maximum of 32 devices with IMK1 may be connected to a
stub line (total of all devices before and after the shunt Zener diode barrier). T -branches ( T-TAP)
are admissible. The Ex devices do not have a disconnection function.
Within the explosion-hazard area per detector base DB1151A only one external response
indicator DJ1191-Ex, DJ1192-Ex or AJUT24-Ex may be connected.
Wiring comprises of a twisted two-wire circuit without shielding. If shielding is used, the
shielding must be earthed on one side at the equipotential bonding.
Further information about installation in explosion-hazard areas can be found in the docu-

ment e1204.

Non-hazardous area

E3M171 DB1151A

–

+

Line module

Explosion-hazard area

DB1151A

SB3

Auxiliary

Shunt Ze-

ner diode

barrier

Equipoten-

tial bonding

(PA)

terminal

Fig. 5 Connection diagram

DB1151A DB1151A

+–

DJ1191-Ex
DJ1192-Ex

max. 70nF / 4mH

AJUT24-Ex

DB1151ADB1151A

+–

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10 Commissioning

To prevent unnecessary soiling during the construction phase, the detectors should be in­serted into the bases just before the system is put into service.
Each PolyRex DOT1151-Ex is connected in p arallel t o t he two-wire d etector b us. The a ddress o f
the individual detectors is determined by the order in which the detectors are inserted, checked
with the detector tester, or by entering the individual detector identification numbers.
The base contains an integrated identification module which means that once detectors of
the same type have been commissioned and addressed, they can be interchanged without
restriction. Based on this identification module the control unit automatically reestablishes
the correct assignment with the correct algorithm. Each base identification module is facto­ry programmed with its own, unique serial number.
If the swapped detectors are of a different type, an error message is output.

11 Maintenance

11.1 Diagnostic possibilities

A detector can transmit 4 events to the control unit:

Stage of danger 0 (quiescent value)
Stage of danger 1 (potential danger)
Stage of danger 2 (probable danger)
Stage of danger 3 (highly probably danger)

Danger level 1

To provide early warning in locations which are difficult for intervention, the number of times
danger level 1 is exceeded is counted by the control unit. Upon reaching a pre-pro­grammed level, the message «Application warning» is given.
These messages are entered in the basic parameterization of the control unit in the event
memory.

Danger level 2

If danger level 2 is reached, the basic parameterization of the control unit activates a
«Warning» message.
This message is also entered in the basic parameterization of the control unit in the event
memory.

Danger level 3

Normally, danger level 3 results in immediate alarm activation.
Cross or multiple detection is possible by programming the control unit accordingly.
Due to the identification module integrated in the base, detectors can be swapped as de­sired after they have been put into service and addressed. Based on this identification mod­ule the control unit automatically reestablishes the correct assignment with the correct al­gorithm. Each base identification module is factory programmed with its own, unique serial
number.

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11.2 Functional check / overhaul

Through the detector self-test the DOT1151-Ex is subjected automatically to an extensive
electrical function check. However, it is still necessary to conduct a physical function test on
site in regular intervals.
Recommendation: A visual check of the detectors must be performed periodically (usual­ly once per year). Detectors that are strongly soiled or which are mechanically damaged
must be replaced.
All detectors should be jointly replaced and factory overhauled in intervals of 6 to 8 years,
depending on the environmental conditions and the severity of contamination (see also
Maintenance instructions, document e1386, manual CS11.2, section 6).

Important:
The DZ1193 optoelectronic detector tester and exchanger as well as the
RE6T detector tester must not be used in explosion-hazard areas!

If mechanically damaged detectors must be scrapped, the plastic materials can be sorted
out based on the embossed code.

Electrostatic danger

The housing is made of plastic and has a surface resistance of >1GigaΩ which means
there is a risk of electrostatic discharge. Therefore the manual call point should not be
located where there is powerful ventilation. Cleaning with solvents is forbidden.

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12 Terms

AlgoLogic Protected trade-mark

(Algorithm + Logic)

AlgoRex Interactive fire detection system with AlgoLogic
Algorithm Special calculation method in the detector processor for

optimizing the smoke sensitivity, noise immunity and reliability

APS Algo Parameter-Set
ASIC Application Specific Integrated Circuit
CS11 Fire detection control unit AlgoControl

to fire detection system S11

DB1151A Base for interactive DS11 fire detectors
DBZ1191 Base attachment
DJ1191-Ex External response indicator
DJ1192-Ex External response indicator
AJUT24-Ex External response indicator
DOT1151A-Ex PolyRex Smoke/Heat detector
DZ1191 Detector extractor
DZ1193 Optoelectronic detector tester and exchanger
E3M171 Line module
EEPROM Electrical Erasable Programmable Read Only Memory
EMC Electro Magnetic Compatibility
EMI Electro Magnetic Influence
ESD Electro Static Discharge
IRED Infra-Red Emitting Diode
ILK Interactive line factor (32)
IMK Connection factor for interactive elements
µP Microprocessor
MUX Multiplexer
NTC Resistor with Negative Temperature Coefficient
PolyRex DOT1151A-Ex combined Smoke/Heat detector for

explosion-hazard areas

RE6 Detector tester
RE6T Detector tester for heat detectors
RI Response indicator
S11 Generic term of fire detection system S11
SB3 Recommended shunt Zener diode barrier

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Back

Siemens Building Technologies AG
Alte Landstrasse 411
CHĆ8708 Männedorf
Tel.

+41 1 - 922 61 11

Fax

+41 1 - 922 64 50

www.cerberus.ch

16

Fire & Security Products

Document no.
Siemens Building Technologies Group 06.2001

Edition

06.2001

e1901a

Manual DS11

Section 6

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