IECEx (Zone 2 and 22 purging system
installation)
GasEye Cross Duct
Operating instructions, 05/2021
247
System pressurization failure alarm
If pressurization failure of the enclosures occurs, power to the GasEye is cut-off by
the 5500 purging controller. At the same time, “K2” relay contacts of 5500 controller
are switched on when pressurization is too low. Those contacts can be used to
generate additional alarms signals or switching. To use it properly, user must replace
24VDC 2-wire power cable with e.g. 5-wire cable and connect additional 3 wires to
the “K2” contacts.
Figure 228. Alarm terminals for pressurization failure.
When alarm occurs, “K2” contacts are energized and switched into NC position (“K2
C” connected with “K2 NC”)
Airoptic Sp. z o.o. supplies purging system controller without any connection to the
“K2” contacts.
