The SD-651 is designed to meet the performance criteria designated by UL. Its sensing chambers are sealed against back pressure air flow, dirt, and insects.
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.
X-NPMI Configurable Network Paging Console is a key module in X-618 Digital Public Address and Voice Alarm System. It provides paging, monitoring, full duplex communication, touch screen operation and