Notifier SDX-551 Smoke Detector

Notifier SDX-551/SDX-551TH photoelectronic sensor utilizes a state-of-the-art, optical sensing chamber. This sensor
is designed to provide open area protection, and to be used with compatible UL-listed NOTIFIER control panels only.
Suitable for use with panel Model AM2020, Loop Interface Board, LIB-200; compatibility ID:A; maximum number of sensors per loop is 99. See 155-531, Revision A, for installation and wiring diagrams.