The EST2 Fire Alarm System is modular in design allowing systems to be easily configured to match installation requirements. With one Signature Data Circuit (SDC) EST2 is capable of supporting 96 detectors and 94 modules and has two built in Notification Appliance Circuits (NAC). The system supports the full line of Signature series detectors and modules. EST2’s modular design means the system easily expands to two SDCs and four NACs by adding a single 2-LCX module increasing system capacity to 380 points/zones with four built in Notification Appliance Circuits. The EST2 provides an RS-232 port to facilitate computer, coder and printer interfacing and an RS-485 communication port for supporting remote annunciation. Annunciation of system events are displayed on a back lit LCD with enhanced diagnostic LEDs on the front panel. There is space to add up to 48 additional points/zones of software controlled LED annunciation and switch control on the front panel. Both alpha-numeric LCD and annunciation LEDs are available for remote annunciation and control with the GE Security 2-LSRA and SAN series of annunciators. EST2 features Auto Programming through the front panel and Custom Programming via PC laptop interface. The Auto Program mode will identify all devices on the SDC and automatically assign addresses to each device. Then the auto programming feature automatically links the proper response to the proper input, providing real time savings during installation.