FDM-1 is a standard-sized dual monitor module used to monitor and supervise two independent two-wire Style B (Class B) dry-contact initiating device circuits (IDCs) at two separate, consecutive addresses in intelligent, two-wire systems.
The NOTIFIER ISO-X Fault Isolator Module is used with the NFS-3030, AM2020, AFP1010, NFS-640, AFP-400, AFP-300, AFP-200, AFP-100 and System 5000 (equipped with an AIM-200 module) to protect the system
This unique and patented device has been helping stop false fire alarms around the world for more than 25 years, without restricting legitimate alarms.