12
MAN3038-2
DISCOVERY PRODUCT GUIDE
7.3
Technical Data:
Specifications are typical and given at 23°C and 50% relative humidity unless specified otherwise.
Detector Type:
Point type smoke detector for fire detection and alarm systems for
buildings
Detection Principle:
Ionisation Chamber
Chamber Configuration:
Twin compensating chambers using one single sided ionising radiation source
Radioactive isotope:
Americium 241
Activity:
33.3 kBq, 0.9µCi
Supply Wiring:
Two wire monitored supply, polarity insensitive
Terminal Functions:
L1 and L2: supply in and out connections
+R remote indicator positive connection (internal 2.2K
Ω
resistance to positive)
-R remote indicator negative connection (internal 2.2K
Ω
resistance to positive)
Supply Voltage:
17 - 28V DC
Communication Protocol
Apollo Discovery 5-9V peak to peak
Quiescent Current:
300µA at 24V DC
Power-up Surge Current:
1mA
Maximum power up time:
10s
Alarm Current, LED on:
3.5mA
Remote output
characteristics:
Connects positive line through 4.5K
Ω
(5mA maximum)
Clean-air analogue value:
23 +4/-0
Alarm level analogue
value:
55
Alarm Indicator:
2 Light Emitting Diodes (LEDs); illuminating red in alarm. Optional remote LED
Temperature range:
-30°C to +70°C
Humidity:
0% to 95% relative humidity (no condensation or icing)
Effect of Temperature:
Less than 10% change in sensitivity over rated range
Effect of Atmospheric
Pressure:
Operating: Suitable for installation up to 2,000m above sea level.
Effect of Wind Speed:
Less than 20% change in sensitivity at speeds up to 10m/s Note: slow
changes in ambient conditions will automatically be compensated and will not
affect sensitivity.
Vibration, Impact &
Shock
To EN54-7: 2000
IP Rating:
44 in accordance with BS EN 60529
Dimensions:
Detector: 100mm Dia x 42mm H, Detector in Base: 100mm Dia x 50mm H
Weights:
Detector 105g, Detector in Base:160g
Material:
Detector housing: White polycarbonate rated V-0 in accordance with UL 94.
Terminals: Nickel plated stainless steel
