FMM-1 is a standard-sized module (typically mounts to a 4" [10.16 cm] square box) that supervises either a Class A (Style D) or Class B (Style B) circuit of dry-contact input devices.
The SCU serves as digital audio memory for Honeywell’s Variodyn D1 PAVA system. Connection to the Variodyn D1 can be established via the Ethernet. This unit can be used to log and record announcements