... fire alarm systemFeatures:1. Multi- loop HBUS bus communication technology, with automatic protection function, nonpolarity design, can ... 5. Provides RS485 communication interface, can achieve the interconnection with our company 's XG100 Graphical monitoring system. 6. With ... ,XE3112H,XE3122,XE3123, XE3124,XE3125, XE3126Our system diagarm addressable electrical fire alarm system for mostly 512 points