<div class="prod-desc-summary">

S-A491 Intelligent Sounder Strobe is a kind of audible and visual alarm device installed in field, which can be initiated by fire alarm control panel in fire control center or by manual call point installed in field. Having been initiated, it will generate strong audible and visual alarm signal to warn people in field.

Both shallow base with 25.5mm high and deep base with 40mm high are available, deep base is used if there is no special statement in this manual.
<ul class="solutions-features">
 	<li>Providing two tones.</li>
 	<li>Using several high red LEDs as light source.</li>
 	<li>Initiated by shorting external terminals; not affected by loop power cut.</li>
 	<li>Signal loop and power loop are polarity-insensitive, which is convenient for wiring and features power-off checking.</li>
 	<li>Standard: EN 54-3.</li>
</ul>
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