Data Sheet:
OPTICAL SMOKE ALARM Model No. 300 - RE
Detection
part
Socket
Description
The ICAS Model 300-RE is an external powered smoke alarm operating on the scattered light principle
with relay output. It is intended for household or similar residential applications as system detector in combine
with suitable central unit.
This model can be powered from an external voltage source (central unit) 9V DC or from an external
source (central unit) with output voltage in the range from 12V DC to 24V DC. It is activated relay in alarm,
sound output and red LED is flashing, It is possible to use both NO or NC potential less contacts for a
communication with central unit.
Model 300-RE contents as an special option a buzzer with a high sound level like self-contained
smoke alarm.
It is best for slow smouldering fires with large smoke particles.
Model 300-RE is non-latching – the buzzer will sound output for an alarm and relay will be activated only when
smoke particles are present in the smoke chamber .
There is one combined push-buttons / LED indicator light projection lens and sound outlet on top of
the smoke alarm. There are six contacts on the bottom side of the detection part for a possibility to contact the
socket part.
The smoke alarm consist of a full covered detection part with optical chamber, sounder and all
electronics components and of the socked with 6 terminals. The terminals are numbered.
Terminal description:
1
+U DC
(for using of the power supply voltage from 12V to 24V DC)
2
+9V DC
(for using of the power supply voltage 9V DC)
3
0V
9V
0V
Shield
4
NO
relay contact – normal open
5
COM
common relay contact
6
NC
relay contact – normal connect
Example
of the connection to the 9V
Installation
1. Locate smoke alarm it in the middle of the ceiling in living and dining rooms, halls and landings, max. 1.5m
from the door in bedrooms and at least 1.5m from wall and at least 1m from lighting fixture or any other
electrical household equipment.
2. Fix socket to the ceiling by two screws and connect correspondent wires from the central unit. The using of
shielded cables (AF CEI 20-22 IEC 332) and connection of the shield to 0V on each position of smoke
alarms is recommended.
