YBO-BS Hochiki Addressable Base Sounder

YBO-BS Hochiki Addressable Base Sounder




Collections: Addressable Fire Alarm Equipment, Beacons, Strobes, Sounders

Product type: Sounder

Vendor: Hochiki

Tags: addressable, base, sounder, ybo-bs



Model YBO-BS is an addressable loop powered Base Sounder innovatively designed to give a range of tones and volumes with a maximum output of up to 98 dB(A) (±2 dB(A)) with low current consumption. The sounder is Ingress Protection rated to IP21 and for internal use only. The unit can also be converted into a wall sounder with the simple addition of a Cap (SI/CAP). The sounder is Ingress Protection rated to IP21 and for internal use only.

An Auto-Shutdown feature allows the user to set a fixed time within which the sounder will operate, before automatically silencing itself, cutting noise pollution (dependant on control panel compatibility).


  • Loop Powered with Single Loop Address - addressed automatically by Control Panel or via the TCH-B200 Hand Held Programmer
  • Variable Sound Output 50 ~ 98 dB(A) (+/-2 dB(A)) output at 1 metre
  • 51 User-Selectable Tones (all tones EN54-3 compatible) Auto-Shutdown feature prevents noise-pollution/


  • Operating Voltage 17 – 41 volts dc
  • Low Power Mode (typ)40 mA
  • Quiescent Current (typ)150 mA
  • Sounding Current (typ)0.8 mA (50 dB(A) @ 1 m) ~ 16 mA (98 dB(A) @ 1 m)
  • Sound Output (at 1 metre)50 ~ 98 dB(A) (±2 dB(A)) @ 24 VDC or above (EN54-3 compliant)
  • Number of Tones 51
  • Tone Frequency Range 300 Hz ~ 2850 Hz
  • Operating Temperature Range -10°C to +50°C
  • Storage Temperature Range -30°C to +70°C
  • Maximum Humidity 95%RH - Non Condensing (at 40°C)
  • Colour / Case Material Ivory or white / PC+PS+GF5
  • Ingress Protection Rating IP21
  • Weight 112g


YBO-BS Datasheet

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