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 L-PCM06A features a cone design with gasket for long operational lifetime. It is CE- and RoHS-compliant, and its metal grille appearance is resistant to rust and crashes.