ADT-LED10 Fire alarm annunciator.

The LED-10 Series Annunciators are capable of displaying independent zone fire alarm,
process monitor alarm, trouble and supervisory status. They also provide system
status LEDs to display Power, Alarm, Trouble, Supervisory and Signals Silenced
conditions. The LED-10 model is also capable of performing system acknowledge,
silence, drill and reset remotely.
Communication between the control panel and the LED-10 Series Annunciators is
accomplished over a two-wire serial interface employing the EIA-485 communication
standard. Up to 32 LED-10 Series Annunciators may be connected to the two-wire EIA485
circuit. The annunciators may be powered from the host FACP or remote, UL
listed, filtered, regulated power supplies.