Fire-Lite I300 Fault Isolator ModuleThe Fire Lite I300 Fault Isolator Module is used with Fire Lites addressable fire alarm control panels to protect the system against wire to wire short circuits on the SLC loop. Integral LED blinks to indicate normal condition. Illuminates steady when short circuit condition is detected. I300 modules mount directly to 4 inch square electrical boxes with a min. depth of 21 8".