Digital fire detection control panel
COMPACT LYON
FIRE PRETECTION MANUFACTURER 5
Ctra. de Molins de Rei a Rubí, Km. 8,4 - 08191 RUBÍ (Barcelona) ESPAÑA.
1- System description
1.1- Introduction
The Digital Fire detection Control Panel Compact Lyon is EN54-2 and EN 54-4 standard certified
according to the latest CE directives and can succesfully overcome difficult environmental conditions,
electrical interference, electromagnetic radiate upsets, vibrations, etc.
The Digital Detection System represents the most modern technology in fire detection and constitutes
a natural evolution from the Identifiable Detection System towards equipment that not only is able to identify
the element that produces the alarm (sensor or button), but that also allows for the total configuration of
detection parameters (alarm levels, sensitivity,…) as well as the adaptation of the set-up to the environmental
conditions and the dirtiness of the sensor.
In the Cofem Digital Detection System, the loop elements (sensors, manual call points, relay modules,
masters, analogue sounders and technical indicator modules) are auto-identifiable, in other words, all of them
can be installed with no need for prior manual encoding, facilitating enormously the assembly of and
subsequent modifications to the installation.
1.2.- Principle of operation
The Digital Detection System is based on the measurement and transmission of the instant value of
the monitored magnitude (smoke, temperature or monoxide concentration), for their subsequent processing
in the control panel, which will consider the alert or standby status of the sensor.
The temperature, the smoke concentration and the amount of monoxide are sent through the
corresponding sensor in electrical voltages related to the measured magnitude.
After an adaptation process, an optimal relationship between the measured magnitude and the
electrical voltage is obtained.
Each sensor incorporates a microprocessor responsible for the digitisation of the analogue value read
in the sensor, for transmission of this value to the control panel and for identification of the sensor.
The main difference between the conventional and analogical detection systems lies in that for the
former the Voltage delivered by the transducer is compared with a predetermined and fixed threshold
(Valarm), obtaining from that comparison the system in standby or system in alarm status.
In the digital detection system, on the contrary, the value given by the transducer is constantly
recorded and processed, being possible to act on the detection parameters, as well as, for example, the alarm
threshold.
With this type of system, not only we can vary the sensitivity of the sensor, but we can even adapt the
sensitivity to the environmental conditions.
Each sensor on the Cofem Digital Detection System transmits its digital value to the control panel with
a regularity of less than 10 seconds. The control panel gathers the readings from each sensor and determines
the status thereof according to these instant readings, any previous readings (history), the pre-programmed
parameters and on the decision algorithm.
