The FMM-1 Monitor Module is designed for intelligent, two-wire systems. It uses built-in rotary switches for individual address selection. The module offers a 2-wire or 4-wire fault tolerant initiating device circuit (IDC) for normally open contact fire alarm and supervisory devices, or normally open/closed security devices. It features a panel-controlled LED indicator and can replace MMX-1 modules. It is also UL Listed as a commercial proprietary burglar alarm accessory and a commercial central station burglar alarm accessory.