Alan electronic systems offers alarm annunciator for industrial use. Salient features: micro-controller and electro-mechanical based logic; easily replaceable window legends; wide input voltage range [18-88 v dc and 88-350 v ac/dc]; standard modules - 1, 2, 6, 8, 11, 15, 19, 23 and any custom built system; fascia windows with long life super bright leds; all site selection by dip switch at the rear [back] side of the unit; flashing synchronisation in group annunciation; and various operating sequences selectable at site. Optional features: green and yellow leds are available for window illumination; and repeat potential free [pf] no contacts for each channel for remote annunciation.