e1485b
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Fire & Security Products
Siemens Building Technologies Group
06.2001
5 Application
5.1 Compatibility
Control units: Compatible with all Cerberus control
units with collective signal evaluation to-
gether with input/output module DC1192
and shunt Zener barrier
Bases: DB1101
5.2 Alignment functions
None.
5.3 Application
OptoRex DO1101-Ex
The OptoRex DO1101-Ex is suitable for applications in ex-
plosion-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.
ThermoRex DT1101-Ex / DT1102-Ex
The ThermoRex DT1101-Ex/DT1102-Ex is suitable for ap-
plications in explosion-hazard areas of zones 0, 1 and 2.
The ThermoRex DT1101-Ex can be used up to a tempera-
ture 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 types of detector cannot be used because work
processes cause smoke, dust, exhaust gases etc.
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 Explo-
sion-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. .
ExEx
SB3
Shunt Zener diode barrier
Equipotential bonding
Detection line,
control unit sided
Supply 24VDC
Non-explosion-hazard area Explosion-hazard area
End-of-line device
Input/output
module DC1192
max. 15 DO1011-Ex
max. 25 DT1011/02Ex
EOL22(Ex)
Ex
Fig. 4 Connection diagram for DO1101-Ex and DT1101-Ex/DT1102-Ex
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