Digital fire detection control panel
LYON
FIRE PROTECTION MANUFACTURER
Ctra. de Molins de Rei a Rubí, Km. 8,4 - 08191 RUBÍ (Barcelona) ESPAÑA.
14
Tlf.: +34 935 862 690 - Fax:+34 936 999 261 - [email protected] -
www.cofem.com
1.5.1.2.- Analogue temperature sensor (A30XTA)
The Analogue Temperature Sensor (
A30XTA
) measures the room temperature, as well as its rate of
change.
When the ambient temperature experiences slow
rates of change (less than 1ºC / min), the Alarm level remains
constant to 60ºC. However, for fast variations in temperature
(above 1 ºC/min), the control panel uses an algorithm capable
of evaluating the rate of change of temperature, and of
adjusting the Alarm level to different gradients (
rate of rise
detection of temperature
). In this way, a fast variation causes
a decrease in the Alarm threshold, thereby accelerating the
detection.
The chosen degree of sensitivity will depend on the
room temperature of the place where each sensor is installed,
and in each case the alarm temperature will adapt to the
chosen degree.
Also in the detection of temperature confirmation by means of two consecutive readings is used (less
than 10 seconds), before activation of the Alarm.
The operation principle is based on the physical properties of an NTC. The variation in electrical
characteristics of the thermistor, due to the variation of the room temperature, is what enables its use as a
sensor element.
The measurement made by the sensor is converted in a Voltage value, which is digitized and
transmitted to the control panel.
The
A30XTA
is conforms to EN 54-5 with the mark of conformity with the regulations awarded by
AENOR with an A2R sensitivity degree.
The head and the base (interchangeable throughout the range of sensors) are made in thermal
resistant ABS.
The flashing of the red transparent LED indicates communication with the Control panel Lyon
system, and if they remain lit they indicate the alert status of the sensor.
Connection is made according to figure 2.
Technical specifications A30XTA
Supply
24 – 35 V, any polarity
Standby consumption
1 mA
Alarm consumption
5 mA
Indicator activation
Double red LED
Remote indicator output
Yes
Humidity
20% – 95% RH
Temperature
-10º + 50ºC
Sensitivity
According to EN 54-5
IP IP20
