Salwico NS-AOS (N11111) is an analogue addressable optical smoke detector for Salwico addressable fire alarm systems. The address is set with a DIP-switch mounted on the back of the detector. When the detector is in alarm condition, a red LED on the detector will be lit. The LED is lit until the alarm has been reset at the control panel. The detector is polarity independent. An external LED indicator, buzzer and so on can be connected to the remote output.