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CHQ-WS2 fire siren


Loop Powered
Single Loop Address – addressed via the TCH-B100 Hand Held Programmer
Variable Sound Output 90 ~ 102 dB(A) (±2 dB(A)) output at 1 metre
Fits Hochiki Standard or Isolator Base
Weatherproof Kit available
51 User-Selectable Tones (all tones EN54-3 compatible)
Also available in white
Approved by LPCB & VdS
SIL Level 2 approved variants available
Model CHQ-WS2 is an addressable loop powered Wall Sounder innovatively designed to provide a range of tones and volumes with a maximum output of up to 102dB(A) (±2dB(A)) with low current consumption. The unit is designed to fit to the Standard Base (YBO-R/3(RED)) or the Isolator Base (YBO-R/SCI(RED)). The sounder is IP rated to IP21 for internal use but it can be made weatherproof by utilising the WS2-WPK Weatherproof Kit, which consists of a specialised back box and gasket set.
Also incorporates an auto shutdown mode* which allows the user to set a fixed time within which the sounder will operate, before automatically silencing itself, ideal for minimising noise pollution.
Ordering Codes
CHQ-WS2 / CHQ-WS2(WHT) WS2-WPK (Weatherproof Kit)
Operating Voltage
17 ~ 41 VDC
Quiescent Current (typ)
150 A (with YBO-R/3(RED))
200 A (with YBO-R/SCI(RED))
Sounding Current (typ)
2 mA (90 dB(A) (±2 dB(A)) @ 1 m) ~
8 mA (102 dB(A) (±2 dB(A)) @ 1 m)
Sound Output (at 1 metre)
90 ~ 102 dB(A) (±2 dB(A)) @ 24 VDC or above
Number of Tones
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
Red or White/ PC ABS
Ingress Protection Rating
IP21 (IP65 with WS2-WPK)
Weight (g)/Dimensions (mm)
152 / H112 x W112 x D67
Base Fixing Centres (mm)
48 ~ 74
*Dependent on control panel compatibility.
Note: Although the TCH-B100 Hand Held Programmer will allow addresses between 128 and 254 to be programmed into the CHQ-WS2, addresses 1 to 127 ONLY should be used.

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