ONYX series ACS annunciator - up to 96 points of annunciation (available on NCA-2/ NCA-2-M & 2-3030 only) with Alarm or Active LED, trouble LED and switch per circuit. Active/Alarm LEDs can be programmed (by powered up switch selection) by point to be Red, Green or Yellow and the trouble LED is always yellow. Expandable with 1 , 2 or 3 AEM-24AT's.