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 4XD300 is controlled and monitored by the Variodyn D1 module’s DOM4-8 or DOM4-24 (Digital Output Module). It comes with a cooling unit socket located on its rear side for the mains connection and