General wiring drawing ／ Characteristics ／ 1.There are two LEDs which can turn 360o and watch the    situation of the detector at any angle. 2.Joint functioning way: NO type and NC type. 3.The use of common base is advantageous to the     exchange of detector. Functioning way／ As there is smoke getting in the detector, by making use of the scattered rays caused by the reflection of smoke, the rays can be detected by the luminous two-node substance inside the device. Then the detector functions and sends out alarm. Meanwhile, the LED is turned on. It is suitable for installation at the places like the entrance of staircase, corridor, lift hall, indoor room, etc. Specifications ／ Model No HC-206B Optical Smoke Detector Overall structure Adopted voltage DC-12V Mainframe Fire-resisting ABS resin material Monitoring electric current 90μA Joint terminal Copper rod (zinc-plated) Functioning electric current 60mA Color Ivory Suitable temperature -15~50° C Notes Prohibit from being installed at the places with large volume of smoke and steam lingering, and the inlet and outlet of cold and warm air. Suitable humidity 0~95% RH Size 103mm x 43mm Weight 1520g Provide the outside with the maximum value of signal input joint volume DC-30V 1A General wiring drawing ／ ※The red wire is the power source (DC-12V) ※The black wire is the signal source. ※For point 3 and point 4, the NO type appears to be open all the time, and the NC type appears to be close all the time.