Siemens Cerberus DO1101A-Ex, Cerberus DT1101A-Ex, Cerberus DT1102A-Ex Technical Description
Page 1
Cerberus® DO1101AĆEx,
DT1101AĆEx, DT1102AĆEx
Wide spectrum smoke detector,
collective
Heat detectors, collective,
intrinsically safe
Technical description
Fire & Security Products
Siemens Building Technologies Group
Page 2
Data and design subject to change
without notice. / Supply subject to
availability.
E Copyright by
Siemens Building Technologies AG
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1 Brief overview 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Characteristics 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Design 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Technical data 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Principle of operation 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Environmental influences 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Influence of the ambient temperature 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Other influencing variables 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Application 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Compatibility 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 Alignment functions 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3 Application 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4 Installation 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Commissioning 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 Maintenance 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1 Functional check 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2 Overhaul 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.3 On-site measurement with the DZ1194 detector test set 7. . . . . . . . . . . . . . . . .
8 Terms 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fire & Security Products
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II
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1 Brief overview
OptoRex DO1101-Ex ThermoRex DT1101-Ex / DT1102-Ex
Dimensions
Ø 115
47...70
With base DB1101
1.1 Characteristics
For applications in explosion-hazard areas of zones
1 and 2
Balanced response behavior and wide range of applications
High reliability and stability through new, high-quality optoelectronic sensor system and fully automatic
manufacturing and inspection processes
High degree of reliability and long-term stability
High resistance to:
Electromagnetic interference (EMI) intelligently designed
circuit
Soiling, temperature fluctuations, humidity and corrosion
achieved through custom developed, protective circuit board
coating
Together with detection line coupler and shunt Zener barrier ,
compatible with Cerberus control units with collective signal
evaluation
Manufactured in state-of-the-art SMD technology
Bayonet fitting for connection to base simplifies detector re-
placement
Comprehensive range of detector base accessories for spe-
cial applications
Dimensions
Ø 115
47...70
51
With base DB1101
For applications in explosion-hazard areas of zones
1 and 2
Heat detectors to meet the highest requirements
DT1101-Ex class A1R heat detector with wide applica-
tion range (up to +50°C)
DT1102-Ex class BR heat detector for high ambient
temperatures (up to +70°C)
Response behaviour immune to deceptive phenomena with rapid and slow increase in temperature
through:
Intelligently designed differential characteristics
Precise maximum temperature alarm activation with
quality thermosensor
54,5
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1.2 Design
OptoRex DO1101-Ex
The OptoRex DO1101-Ex is eminently suited to early
detection of smoldering fires, but it also quickly detects
flaming fires that produce smoke. The newly developed,
high-quality optoelectronic system ensures a homogenous
response behavior across a wide smoke spectrum, ranging from light-colored to dark smoke.
The OptoRex DO1101-Ex conforms to EN 54-7 and is consequently a universal smoke detector.
The built-in response indicator (red LED) serves as a local status
indicator. An external response indicator can be connected to the
base.
For periodic factory cleaning the detector can be easily disassembled.
The detectors are fully electronic and are not subject to wear and
tear. To protect it against environmental influences the electronic
circuit has a specially developed circuit board protective coating.
The DB1101 detector base is mounted on the ceiling direct on the
recess box direct, or surface-mounted using the DBZ1191 base attachment and connected to the control unit via twin wire. The base is
fitted with spring terminals for connection.
The detectors are secured in the base DB1101 with a vibrationproof bayonet fitting. Efficient installation and removal of a detector
is possible by means of the DZ1191 detector extractor. For testing of
the DO1101-Ex serves the RE6 testing unit. DT1101Ex and
DT1102-Ex can only be tested with RE6T in non-explosion hazard
areas. By means of extension tubes this work can be carried out up
to a height of 7 metres without additional tools.
A range of base accessories is available for installation in wet areas
and for protection against theft etc.
ThermoRex DT1101-Ex / DT1102-Ex
The DT1101-Ex/DT1102-Ex ThermoRex is suitable for the
monitoring of rooms in which upon an outbreak of fire, a
rapid rise in temperature is to be expected.
The DT1101-Ex ThermoRex complies with standard EN
54-5 and can be used for a wide range of applications. The
DT1102-Ex ThermoRex complies with standard EN 54-5
and is suitable for higher ambient temperatures.
2
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2 Technical data
Normal ambient conditions, if nothing else is specified:
Temperature TaDO1101-Ex =20°C (293K) DT1101-Ex/DT1102-Ex =25°C (298K)
Air pressure p = 1’000hPa (750 Torr)
Parameters Symbol Unit DO1101-Ex DT1101-Ex DT1102-Ex Conditions
Operating voltage
(quiescent condition)
Max. permissible voltage U
Starting current I
Operating current
(quiescent condition)
Alarm voltage
at IA = 1 ... 10mA
at IA = 1...60mA
Max. alarm current, pulsed I
Reset voltage U
Reset current I
Reset time (UR = 2V) t
Response integrating time t
Response sensitivity D
Electrical sensitivity
signal voltage ∆
Ext. response indicator:
Voltage
Current
Flashing frequency
Capacitance detection line
AI line
Inductance detection line
AI line
Response sensitivity
temperature increase
dT/dt = 10K/min.
EN 54-5 class A1R
max. release temperature
EN 54-5 class BR
max. release temperature
Electromagnetic compatibility V/m min. 50 min. 50 min. 50 1MHz ... 1GHz
Operatic compatibility T
Humidity ≤34°C
>34°C
Storage temperature (continuous) T
Protection category
EN60529/IEC529
Colour white
Standards
- for fire detectors EN54-7 EN54-5
U
max
I
U
U
U3A
U
I
dT
T
T
VDC 17 24. . . . . . . 16 24. . . . . . . 16 24. . . . . . .
b
VDC max. 27 max. 27 max. 27
e
b
A
A
A
R
R
R
A
1
µA max. 160 max. 100 max. 100 max. 25s after switch-on
µA max. 100 max. 100 max. 100 for DT1101-Ex Ta=25...50°C
V
5 10. . . . . .
V
5 12. . . . . .
5 10. . . . . .
5 12. . . . . .
5 10. . . . . .
5 12. . . . . .
mA max. 100 max. 100 max. 100 must be limited externally
for DT1102-Ex Ta=25...70°C
f≥0.5Hz, Duty Cycle 50%
V 2 6. . . . . . . 2 6. . . . . . . 2 6. . . . . . .
µA 20 500. . . . . 40 500. . . . . 40 500. . . . .
s
max. 2 max. 2 max. 2
s typ. 7 –– ––
%/m typ. 3.0 –– –– smoke sensitivity with paraffin
test aerosol (1m/s)
V 1.2 2.8. . . . . . –– –– measurement with DZ1194
V
ie
ie
a
a
a
mA
l
1.5 6. . . . .
Hz
°C
°C
°C
max. 50
1
≤1nF
≤33nF
-
≤40µH
––
––
––
°C –25 +60. . . . –25 +50. . . . –25 +70. . . .
≤95% rel.
3
≤35g/m
abs.
°C –30 +75. . . . –30 +75. . . . –30 +75. . . .
1.5 6. . . . .
max. 50
1
≤1nF
≤33nF
-
≤40µH
20 40. . . . . . .
54 62. . . . . . .
≤100% rel.
3
≤35g/m
abs.
1.5 6. . . . .
max. 50
1
≤1nF
≤33nF
-
≤40µH
20 40. . . . . . .
74 85. . . . . . .
≤100% rel.
3
≤35g/m
f≥0.5Hz, Duty Cycle 50%
depending on line module
transient condensation allowed
abs.
IP44 IP44 IP44
≈RAL9010
white
≈RAL9010
white
≈RAL9010
EN54-5
class A1R
class BR
– for explosion-hazard areas EN50014
EN50020
EN50014
EN50020
EN50014
EN50020
Application category IEC 721-3 3K6 3K8H 3K8H
Ex classification EEx ib IIC T4
(Ta ≤60°C)
EEx ia IIC T4
(Ta ≤50°C *)
EEx ia IIC T4
(Ta ≤70°C *)
Ex approvals
– PTB Nr.
– ASEV Nr.
Ex-96.D.2060
96.1.10358
Ex-95.D.2148
95.1.11013
Ex-95.D.2148
95.1.11013
Load factor KMK 1.6 1 1
* not Ex conditional (Alarm release DT1101-Ex 54°C
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
Fire & Security Products
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DT1102-Ex 74°C)
3
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3 Principle of operation
OptoRex DO1101-Ex
The OptoRex DO1101-Ex is based on the principle that
smoke scatters light. An infrared LED (IRED) transmits
brief, intensive light pulses into the scattering chamber.
The receiving element is screened off from direct IR light
incidence and reflections. Smoke entering the chamber
scatters the light so that some of it reaches the receiver
whose signal is evaluated by the electronics. After three
positively evaluated pulses an alarm is transmitted to the
control unit.
Time base 2 in the integrated circuit 1 controls the logic
unit 3 and produces pulses for controlling the IRED light
source 5 via the amplifier 4. If the detector is not contaminated and the air is clean, no signal is available at the receiver 6.
If the air contains smoke, the receiver sees a signal that is
transmitted via the amplifier7 to the discriminator 9. Integrated in the amplifier is a multiple coincidence circuit that
generates the difference between a light and a dark measurement which has the effect that no interference signals
and «only» smoke induced signals are amplified and transmitted. In circuit 8 a stable reference voltage U
duced which in discriminator 9 forms the alarm threshold.
The detector sensitivity is set with the trimming resistor 10.
The signal voltage U
at the output of the receiving ampli-
sig
aref
is pro-
ThermoRex DT1101-Ex / DT1102-Ex
The ThermoRex DT1101/DT1102 measures the ambient
temperature with the NTC thermistor Rm in the tip of the
sensor and measures the temperature in the detector
housing with the NTC thermistor Rg. Rapid temperature
changes bring about a faster change of resistance with
thermistor Rm than with thermistor Rg. This causes a positive voltage shift at point P. As soon as this voltage exceeds
a fixed threshold value, the threshold value detector 3 activates multivibrator 4 and an alarm is given. If, due to a very
slow increase in temperature, the resistance values R
and Rg fall to the same extent, upon reaching a maximum
temperature determined by resistors 1 and 2 an alarm is
given. At the same time resistor 2 accelerates response
for fast changes in temperature.
The weak current IB flows in non-alarm condition. As soon
as the multivibrator 4 becomes conductive, the response
indicator alarm current IA flows. At the same time the response indicator 6 built into the detector is activated via
the driver stage 5. One external response indicator 7 may
be connected. The multivibrator remains in self-hold condition until the control unit is reset by briefly interrupting the
operating voltage, whereupon it reverts to its original state.
The intrinsically safe detector circuit is isolated from the line
circuit by protective diodes 8.
fier can only be factory-measured with the aid of special
measuring equipment. The alarm threshold U
for measuring the alarm stroke ∆
on site with the detec-
U3A
is used
aref
tor measuring instrument DZ1194.
The logic unit 3 evaluates the pulses of discriminator
9
and after the third pulse activates the alarm stage 11 integrated in ASIC. Also activated in the event of an alarm are
the internal response indicator 12 and an external response
indicator 13 if available. The alarm stage 11 is self-holding
and is restored to the initial condition only when reset by the
system control unit (through brief interruption of the operating voltage). The intrinsically safe detector circuit is isolated from the line circuit by protective diodes 14 .
5 6
4
1
ASIC
7 9
10
U
sig
∆
U3A
B
+
D
F
12 13
3
E
8
U
aref
11
2
14
Detector
Base
U
B
C
A
–
Shunt Zener
diode barrier
Operating voltage
2
6
R
m
P
R
g
1
MB
3
4
I
A
I
B
5
Detector
B
D
F
7
E
8
C
A
Base
Fig. 1 Block diagram DO1101-Ex Fig. 2 Block diagram DT1101-Ex/DT1102-Ex
+
U
B
Operating voltage
–
Shunt Zener
diode barrier
m
4
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4 Environmental influences
4.1 Influence of the ambient temperature
OptoRex DO1101-Ex
[%/m]
5
4
DO1101A-Ex
3
2
1
0
0 102030405060–10
Ambient temperature
ϑ
[°C]
Fig. 3 Smoke sensitivity of the OptoRexDO1101-Ex as
a function of the ambient temperature
4.2 Other influencing variables
Ambient light, air drafts and fluctuations within the specified operating voltage range have no influence on the detector.
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5 Application
5.1 Compatibility
Control units: Compatible with all Cerberus control
Bases: DB1101
5.2 Alignment functions
None.
5.3 Application
units with collective signal evaluation together with input/output module DC1192
and shunt Zener barrier
OptoRex DO1101-Ex
The OptoRex DO1101-Ex is suitable for applications in explosion-hazard areas of zones 1 and 2. Due to its EN 54
compliance, the OptoRex DO1101-Ex can be used as a
universal smoke detector.
The recommended monitoring areas, distances between detectors
etc. can be found in the national guidelines, the Cerberus «Guide-
lines for Planning and Application» (CRP), «Fire Detection in Explosion-hazard Areas», document e1204., or the «Security Guide».
5.4 Installation
Bases are connected together by twisted twin wire. Shielded cable
is only required for special applications, e.g. in the case of powerful
high frequency fields or special national guidelines.
For detailed information, see «Fire Detection in Explosion-hazard
Areas», document e1204. .
Non-explosion-hazard area Explosion-hazard area
ThermoRex DT1101-Ex / DT1102-Ex
The ThermoRex DT1101-Ex/DT1102- Ex is suitable for applications in explosion-haz ard areas of zones 0, 1 and 2.
The ThermoRex DT1101-Ex can be used up to a temperature of 50°C and the DT1102-Ex up to a temperature of
70°C. The DT1101-Ex/DT1102- Ex are especially suitable
for monitoring rooms and installations in which in the event
of fire, a rapid increase in temperature is to be expected, or
where other t ypes o f d etector c annot b e u sed b ecause w ork
processes cause smoke, dust, exhaust gases etc.
Input/output
module DC1192
Detection line,
control unit sided
Supply 24VDC
Shunt Zener diode barrier
SB3
max. 15 DO1011-Ex
max. 25 DT1011/02Ex
Equipotential bonding
Fig. 4 Connection diagram for DO1101-Ex and DT1101-Ex/DT1102-Ex
6
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Ex
EOL22(Ex)
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6 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.
For detailed information, see «Fire Detection in Explosion-hazard
Areas», document e1204. .
7 Maintenance
7.1 Functional check
A functional check of the detectors must be performed periodically
(usually once per year) by forcing each detector to respond by
means of a suitable testing device (RE6 or DZ1192 for DO1101-Ex
or RE6T for DT1101-Ex/DT1102-Ex). Detectors that do not respond
or which are mechanically damaged must be replaced.
7.2 Overhaul
All detectors should be jointly replaced and factory overhauled in intervals of 2 to 8 years, depending on the environmental conditions
and the severity of contamination.
Important !
The DZ1193 and RE6T detector tester and the DZ1194 detector
!
!
test set must only be used in areas where there is no explosionhazard!
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.
7.3 On-site measurement with the DZ1194 detector test set
OptoRex DO1101-Ex
The voltage ∆
checked with the DZ1194 detector test set. The ∆
age measured is directly proportional to the remaining voltage increase for alarm.
can be measured and alarm activation
U3A
Detectors with values which lie outside those in the technical data
must be replaced.
U3A
volt-
ThermoRex DT1101-Ex / DT1102-Ex
The operating current can be measured and alarm activation checked with the DZ1194 detector test set.
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8 Terms
ASIC Application Specific Integrated Circuit
CC11 Fire detection control unit AlgoControl
to fire detection system S11
CZ.. Fire detection control unit to fire detection system MS9
DB1101 Base for collective DS11 fire detectors
DBZ1191 Base attachment
DC1192 Input/output module
DO1101-Ex OptoRex smoke detector, for explosion-hazard areas
DT1101-Ex ThermoRex heat detector with static alarm threshold 60°C,
for explosion-hazard areas
DT1102-Ex ThermoRex heat detector with static alarm threshold 80°C,
for explosion-hazard areas
DZ1191 Detector exchanger
DZ1194 Detector test set
EMC Electro Magnetic Compatibility
EMI Electro Magnetic Influence
ESD Electro Static Discharge
IRED Infra-Red Emitting Diode
KMK Load factor for collective elements
NTC-Thermistor Negative Temperature Coefficient Thermistor
RE6 Detector tester
RE6T Detector tester for heat detectors
R
g
R
m
Measuring sensor for housing temperature
Measuring sensor for ambient temperature
RI (AI..) Response indicator
S11 Generic term of fire detection system S11
SB Shunt Zener diode barrier
8
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9
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Siemens Building Technologies AG
Alte Landstrasse 411
CHĆ8708 Männedorf
Tel.
+41 1 - 922 61 11
Fax
+41 1 - 922 64 50
www.cerberus.ch
10
Fire & Security Products
Document no.
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Edition
e1485b
06.2001
Manual DS11
Section 6
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06.2001
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