Conventional Fire System

September 19, 2017

fire systemConventional Fire System: that is, the use of two content cables for the relationship between the detector to the detector and to the Panel. Used cables are generally 2×1.5mm NYMHY or 2×1.5mm NYMHY cables drawn in conduit pipes such as EGA or Clipsal. In critical installations are often used fire resistant cable (FRC) with a size of 2×1.5mm, especially for cables leading to the Panel and 220V power source.

Wire Type the terminal name of the detector is L (+) and Lc (-). This cable is connected to the Fire Alarm Panel at the terminal labeled L and C as well. The interrelationship between detectors with each other is done in parallel with the condition that it should not be branched which means there must be a starting point and a END point.

The end point of the cable pull is called the End-of-Line (EOL) term. At this point the last fire detector is installed and here also one loop is terminated (stop). In the last detector is installed one EOL Resistor or EOL Capacitor. So the truth is EOL This resistor is installed at the end of the loop, not inside the Control Panel and the sum is only one EOL Resistor on each loop. Therefore it can be said 1 Loop = 1 Zone is closed with Resistor End of Line (EOL Resistor).

As for the conventional term, the term is to distinguish it from the Addressable system. In a conventional fire  system, each detector is just a regular electrical contact, not sending a dedicated Address ID.

Wire Type is used when desired so that each detector has its own output in the form of a lamp. Examples of the application, for example for hotel rooms and hospitals. An indicator lamp – called the Remote Indicating Lamp – is mounted over the outer door of each room and will light up when the detector detects. That way, the fire location can be known to outsiders through the lights.

Wire Type is commonly used on most 12V Smoke Detectors to be connected to the Home Alarm Panel. As is known Panel Alarm Home using 12VDC source to supply voltage to the sensor one of which can be Smoke Detector type 4-Wire. Here, there are 2 cables used as supply + 12V and -12V, while the remaining two are NO – C relays connected to the terminal marked ZONE and COM on the alarm panel. In addition, this type of 4-wire can also be used if there are one or more detectors “assigned” to trigger other equipment in the event of fire, such as: turn off the factory machine switch, turn on the water pump machine, activate the sprinkler system or releasing agent) and so on. Usually a 4-wire detector has a voltage range between 12VDC up to 24VDC.

No Comments

Leave a Reply