Non-Addressable Heat DetectorThe Non Addressable Smoke Heat Detector uses photoelectric smoke and heat sensors, analog detection differentiation, and dual LEDs for 360 degree visibility. 2 wire and 4 wire models for DC 12V and 24V operation DC 4 wire model for DC 48 V operation 4 wire models available with a N O alarm relay output 4 wire models available with auto reset 2 wire models available with remote LED output Connects to zone monitor for use with addressable control and