This paper describes a simple and low cost design of Ethernet based addressable fire alarm system. Each fire zone system consists of a microcontroller, Ethernet controller and fire detection and alarm circuit. Fire detection circuit reads the status of the fire and sends signal to the microcontroller. Ethernet controller, ENC28J60 enables the communication between microcontroller and Ethernet IEEE 802.3 protocol. The various fire zone systems are connected in different areas of the premises. The status of each fire zone is monitored by main system. Each fire zone system has its unique static IP address and MAC address. The main system is designed in such way that, it collects the status of each fire zone system and displays on a single webpage. It can be accessed from anywhere, once its connected to the internet. In industry, during the installation of building Ethernet connectivity is an important part. Hence there is no need of any special wiring to set up the fire alarm system.
IEEE 802.3 protocol, microcontroller, Ethernet controller, addressable system
