2-3-0-629/ISS3/JUN11
Tones and Volumes
Table 1 below shows the full range of sound outputs available from the YBO-BS and the amount of current drawn
when operated. When the YBO-BS is selected to be a base sounder (sensor on top) the default sound output will
be 85dB(A). The YBO-BS is also capable of utilising a number of different EN54-3 Approved tones; these are
listed In Table 2. The tone of the sounder and the volume level is selected and controlled by the control
panel, therefore check with the control panel manufacturer for options and default values available.
Table 1
Table 2
Nominal Sound Output dB(A)*
‡
Current Drawn mA
Tone Number Tone Frequencies & Durations*
50 0.8
1 925Hz/0.25s, 628Hz/0.25s
55 0.8
4 (French) 554Hz/0.1s, 440Hz/0.4s
60 0.8
5 (Swedish) 660Hz/0.15s, 0Hz/0.15s
70 0.8
8 (Whoop) 500HZ/3s, 1200Hz/0.5s
78 1.5
12 (Sweep) 800Hz/1s, 970Hz/0s
80 2.0
15 (Sweep) 2400Hz/1s, 2850Hz/0s
85 3.0
17 (970:ISO8201) 970Hz/0.5s, 0Hz/0.5s
88 4.5 18 (2850:ISO8201) 2850Hz/0.5s, 0Hz/0.5s
90 6.5
93 8.0
94 10
95 11
* Refer to AP083 (available from our website) for complete EN54-3 A-weighted
sound levels.
98 16
‡
@ 1m distance.
Installation
The base sounder is designed to be mounted on the Standard Mounting Base (YBN-R/3) or the Short-Circuit
Isolator Mounting Base (YBO-R/SCI, from batch code 6044 only) in the same method as a Sensor. The terminals
on the mounting base hold the YBO-BS and in turn the terminals on the YBO-BS hold the sensor, beacon or cap if
being used as a wall sounder (see below). For correct wiring of the appropriate mounting base, please refer to the
diagram below.
Remove tab carefully using a pair of pliers.
Locking Mechanism
The base sounder can be locked onto the relevant mounting base
by removing a plastic lug on the underside of the sounder (see
Fig. 3).
The sounder can then only be removed by using a special
Removal Tool (TSC-SRT), which is available from Hochiki
Europe (UK) Ltd.
Fig. 3
Using the YBO-BS as a Wall Sounder
A push-fit cap (SI/CAP) is available to cover the electrical connections if an analogue sensor, beacon or indicator
is not being fitted (see Fig. 2). Align the arrow marked inside the cap with the sensor alignment mark on the base
sounder. This will ensure the four tabs on the cover will engage with the matching slots in the base sounder. Push
cap firmly onto the base sounder until it clicks into place.
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