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10 Wired networking of
several smoke detectors
If one or more smoke detectors has or have to
be mounted at a location where only a limited
wireless connection is available due to a building’s
reinforcements being well shielded or due to
electromagnetic interference, several smoke
detectors can be networked using wires in order
to ensure that signals can be sent and received
properly.
This type of network also increases signalling
reliability at locations that, in addition to the
restrictions mentioned above, are some distance
away or are sound insulated, as when one smoke
detector triggers an alarm, all the connected
smoke detectors also set off their alarms.
However, as the LED in the test button only flashes
on the smoke detector that has triggered the
alarm, this detector can be easily identified.
A twisted, two-wire cable such as a J-Y(ST)Y 2 x 2
x 0.6 mm should be used as the connecting cable.
This ensures that a maximum overall network
length of up to 400 m is possible.
Up to 40 smoke detectors can be networked using
wires.
Summary of Contents for HM-Sec-SD
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