VII. Interconnection Between
Devices
When multiple units are needed to secure a large area or perimeter around a
work site, the Detective+ units can be connected together to provide indication
of hazardous gas level alarms on all units, even when the detecting unit may be
out of sight/sound of some of the working party.
Two connector sockets are provided at the rear of each Detective+ unit to
permit this mode of operation. Using only suitable Crowcon supplied cables,
connect each Detective to its two neighbours in a “Daisy Chain” configuration.
When a unit in such a system detects a gas alarm it will initiate an alarm in all
units. The unit detecting the alarm will indicate the alarm in the normal man-
ner as described in the preceding sections. The other units in the system will
indicate an alarm with the beacon lights at the top of the unit flashing at a
much slower rate. This permits the user(s) to determine at which point the gas
alarm is occurring.
Up to twelve Detective+ units can be connected in this manner with a maxi-
mum cable length of 100 m between adjacent units.
Detective+ Interconnection Between Devices
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