VSO Sounder

VSO Sounder & Lid VSO Sounder

The VSO Sounder is a ceiling mount base sounder. It has been designed for use with conventional fire alarm systems and accepts all Ampac detector bases while offering a cost-effective solution for sounder installation.

The VSO Sounder is a low profile sounder with 32 selectable tones as standard and is factory set to the Australian compliant AS4428-16 tone. The sounder has the option of a changeover facility from Alert to Evacuate tone when installed using 3 core cable.

All tones have been selected to comply with the latest sound patterns and frequencies used throughout the world. All tones are fully synchronised. When a detector is not being mounted to the sounder a blank cover plate is available so that the unit can be used as a standalone sounder.

  • Switch selectable volume output levels
  • Modem ultra-low profile for discreet mounting
  • Designed to accept most leading detector bases
  • Two colour options
  • Designed to work with conventional alarm circuits
  • Synchronisation between devices

Approvals: AS ISO 7240.3:2014







    Volume Settings 3 - high, medium & low
    Voltage 18 to 30 V dc
    Current at Vmax (30 Vdc) 13mA high, 8mA med, 6mA low
    Current at Vmin (21 Vdc) 10mA high, 5mA med, 4mA low
    Sound Output Typical Max 90.9dB (high)
    Sound Pattern (Evacuate) 520Hz +/- 5% on a temporal 3 pattern (ISO8201)
    Sound Pressure (Alert) 520Hz +/- 5%, 1 pulse of tone for 0.5 seconds followed by 3.5 seconds of silence (ISO7731)
    Number of Tones 32 (refer tone table)
    Monitoring Reverse Polarity
    Sounder Type Type A
    Temperature Range (°C) -20°C to + 70°C
    Protection Rating IP21C (Shallow Body)
    Body Colour White or Ivory (ABS Fire Retardant Plastic)
    Dimensions Ø 20mm x 20mm D
    Boxed Weight 0.11 kg
    4107-3005 VSO Sounder White Body
    4107-3006 VSO Sounder Ivory Body
    4107-3008 VSO White Sounder Cover Plate