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The SI-3
industrial alarm
The SI-3 alarm can monitor up to 3 services with one
condition per service. Each alarm condition has a relay providing volt-free
contacts for connection to other systems. The alarm is mounted in an enclosure
protected to IP65 & is fitted with an audible alarm and a Mute/Test push
button. A Xenon beacon can be fitted to the alarm as an optional extra. For
applications where the alarm initiating contacts are in an area where explosive
gas mixtures may be present, zenner barriers can be fitted within the alarm
panel, making the initiating circuits intrinsically safe. Note that, where
zenner barriers are used, a connection must be made to the consumer's main
earth, using a minimum of 4mm sq. cable. See BS5345 for more details.
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