The AS1200 Annunciators are simple Common alarm indicators with 12 NO Inputs. As soon as an input is activated, the corresponding external indicator and the relay is enabled. The device connected to the relay, e.g. a horn or a flash-light is activated until the external horn acknowledgement button is pressed. This sequence starts everytime when an alarm occurs. Even short pulses are detected.
The nominal supply voltage is 24VAC/DC, the allowed voltage range is 10-30 VDC / 12-24VAC.