OWS 120W

Product Overview

The Ampac Single Zone Occupant Warning System is available as a 120 Watt audio output with an optional front panel control. The alert and evacuation signals are compliant to AS1670.1 and NZS4512 including voice messages as standard.

The speaker circuit is protected and monitored for shorts and interruptions. Up to three spur lines (branches) are supported. A monitored strobe output is provided as standard which supports both xenon and led strobes.

Each audio source (alert / evacuation signals, emergency paging and secondary analogue audio input) has a dedicated volume control.

Three programmable relays are provided, which default to Emergency Warning Condition, Fault and Test Mode.

The optional front panel control has an integrated emergency microphone (and can optionally support a hand held microphone)

The Single Zone Occupant Warning System is suitable for use in Ampac’s FireFinder and FireFinder Plus Fire Alarm Control Panels.


  • Optional front panel control
  • Alert and Evacuation Signals to AS1670.1 / NZS4512
  • Speaker Line Monitoring and Protection
  • Monitored strobe output
  • Volume Control
  • Dedicated emergency microphone input
  • Secondary analogue audio input
  • Programmable evacuation strategies
  • False Alarm, System test and Lock Down Messages
  • Three programmable output relays




Supply Voltage     

27VDC (nominal)

Max Audio Load


Quiescent Current (no audio load, no strobe load)


Max. Current (full audio load, no strobe load)


Strobe Output (Xenon)

8 sets (208-0011)

Strobe Output (LED)

40 sets (4107-1005/6)

Audio output voltage



-20°C to 70°C


0-95% non-condensing

Alert / Evac Changeover time (secs)

Alert only, Evac only, 60, 90, 120, 180, 300 or under manual control

Speaker EOL

Nominal 47kΩ 5% 1/3 Watt



Signal to Noise Ratio


Amplifier Dimension

(L x W x H)

170mm x 210mm x 85mm


Item Numbers


OWS 120W Amplifier


OWS Indicator & Controls