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Johnson Controls M300RJ Addressable Relay Module Aspirating Smoke Detectors Apollo ORB-HT-11003-APO Orbis Heat DetectorJohnson Controls M300RJ Addressable Module Single Relay 500 Series Flashscan CLIP The Johnson Controls M300RJ Addressable Relay Module provides a dry contact output for activating a variety of auxiliary devices, such as fans, dampers, and control equipment. Addressability allows the dry contact to be activated either manually or through panel programming on a selective basis.