The Intelligent Addressable Priority Monitor Module MRI-100P provides an address for a group of UL Listed normally open (N.O.) initiating devices, such as heat detectors, beam smoke detectors, 4-wire smoke detectors, waterflow switches, manual pull stations, etc. wired in a Class A (Style D) or Class B (Style B) initiating circuit. The MRI-100P is equipped with a priority interrupt to provide a fast response to emergency conditions. The MRI-100P has an activated red LED.