Optical analogical smoke detectors intrinsically safe “EEX ia ”. analogical detection with signal processing algorithms grasped by the detector. Ideal for classified zones installations (Zones 0, 1 and 2). Includes manal and automatic test function and dedicated manual directioning (01-99). Includes two LEDs for alarm indication and a remote indicator output. Only compatible with CLIP 99+99 protocol. Requires B501AP base, Y72221 galvanic isolator and IST200E converter interface for each detection line.