SigCom AU502 Fire Alarm

The AU-502 can be powered from either a continuous or a switchable 24 VDC power source. By powering the AU-502 from a switchable 24 VDC source minimum power consumption during quiescent periods can be maintained. In addition, the AU-502 24 VDC power input is polarity sensitive allowing connection to be supervised by a polarity reversing source (i.e. NAC).