PLC based Multi-channel Fire Detection & Alarm System Project


PLC based Multi-channel Fire Detection & Alarm System Project report

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PLC based Multi-channel Fire Detection & Alarm System Project

PLC based Multi-channel Fire Detection & Alarm System Project


Abstract: Fire alarm system is a combination of number of devices working together to detect and warn the people through a visual and audible appliances when smoke, fire are present .The alarm used in FAS may be activated from smoke detectors or heat detectors.Alarms can be either motorized bells or wall mountable sounders or horns. Fire alarm system plays the main role in maintaining and monitoring the safe of all kind environments and situations. However the usability of many existing fire alarm and detection system is well known but could be produce with high cost.. The main objective of this Fire Alarm Control System in Building Automation Using PLCis to make a fire control and suppression system with reliable cost. The Fire Alarm Control System in Building Automation Using PLChas three main systems, 1) the detection fire, 2) the monitoring system and 3) the appliance system in which the main door will get open and Lift will come to ground floor for safety purpose. The detection system operates as the fire detector. This detection system has components like bimetallic strips as a flame detector, smoke detector, heat detector. This project is design and implementation of a fire alarm system using the PLC S7-1200 which operates the entire system. The detectors are placed in such a way that they are parallel in different levels. Any signal from each detector at any level is detected and monitored using monitoring system. The appliance system has components like buzzer for alarming and motor pump to stop the fire. Relay driver to make switch on/off relay according to PLC output. The entire system is controlled by PLC. The PLC is programmed in such way by using ladder diagrams. From the project done, the system can detects smoke, heat etc. are sensed by the detector, followed by the monitoring system which indicates smoke, heat etc. at that particular level. Finally when the sensors form each level triggered individually, the main buzzer operates and disconnect the AC power supply. Then it runs the emergency exit Door motor to escape


A Programmable Logic Controller is a special computer device used for industrial control systems. These are used in many process industries such as oil refineries, manufacturing industries, conveyor systems etc. If there is a need to control devices, the PLC provides a more flexibility to "software" the components together. The most important part of the PLC is a CPU (a computer processor) that is dedicated to run one program that monitors a series of different inputs and logically manipulates the outputs to the desired control. They are very flexible in how they can be programmed while also providing the advantages of high reliability, small in size, flexible and economical over traditionalcontrol systems.