Connection of detectors Labor Strauss
Chapter 2 • Conventional technology
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2.9.6
Thermal detector HT-27121-275
2.9.6.1 Notes
The number of detectors of a zone is not limited since only a thermally controlled, normally open con-
tact (bimetallic strip) is used. (Quiescent current of the detector = 0 mA).
This detector activates at 135°C (275°F) and does not have a light emitting diode.
This connection also applies analogously to the following detectors, because they also do not have a
light emitting diode.
Type
Alarm temperature
27121-0-225
107°C
27121-0-275
135°C
LST AN242170
27121-0-325
162°C
27121-0-360
182°C
27121-0-450
232°C
27121-0-600
315°C
27121-0-725
385°C
2.9.6.2 Connection
Make sure that the temperature resistance of the connection cable is sufficient.
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