Bosch FAH-420, Operation Manual

Page: 43 / 50

Technical Data
DO detectors
Detector Type FAP-DOTC420 FAP-DOT420 FAP-DO420
Detection principle Combination of:
–
Scattered-light measurement
– Measurement of absolute
temperature and temperature
increase
Scattered-light
measurement
– Combustion
gas
measurement - -
Special features – Two optical sensors
– Contamination detection
– Drift compensation in the optical sensor
– Operation switching/sensor
deactivation in the optical unit and
in the thermal unit -
Operating voltage 15 V DC to 33 V DC
Current consumption < 0.55 mA
Individual display Two-color LED (red/green)
Alarm output Per data word by two-wire signal line
Indicator output Open collector connects 0 V over 1.5 kilohm, max. 15 mA
Response sensitivity (basic
data)
Optical sensor < 0.18 dB/m (EN 54-7)
Thermal sensor EN 54-5 -
– Thermal differential
unit -
– Thermal maximum unit > 54 °C/> 69 °C -
Chemical sensor ppm range - -
Max. monitoring area 120 m
2
(observe VdS guidelines)
Max. installation height 16 m (observe VdS guidelines)
Permitted air speed 20 m/s
Permissible operating
temperature -10 °C. . . +50 °C -20 °C. . . +50 °C -20 °C. . . +65 °C
Permitted relative humidity < 95% (non-condensing)
Protection category
according to EN 60529 IP 40/IP 43 with detector base with damp room seal
9
Automatic Fire Detectors LSN
improved
Technical Data | en 43
Bosch Sicherheitssysteme GmbH Operation Guide 12/2012 | 8.1 | F.01U.003.448