The in-suite isolator module FW859 fits into a 4-square-inch square electric box. The Module provides two supervised isolator outlets (two dwellings) with a capacity of 200 mA per output. In this configuration, if the sound system has an open circuit, the control panel will indicate a zone problem.
This alarm isolator module is a product ranked UL according to UL864 and ULC-S527 for fire protection signalling systems for indoor use.