Auxiliary Junction Box - Crowcon IRmax Instructions D'installation, D'utilisation Et De Maintenance

4. Auxiliary junction box

An IRmax or IREX gas detector can be installed using an auxiliary junction box. Cast
from 316 stainless steel and available with two M20 or ½" NPT cable entries, the auxiliary
junction box is ATEX and IECEx certified for use in zone 1 or 2 hazardous areas.
The auxiliary junction box provides ample space for connecting field cables - see the
dimensioned drawing (Diagram 6 on page 7), and must be used where RS485 Modbus
enabled versions of IRmax are to be used and multi-dropped in addressable networks.
A Crowcon spigot gland must be used to connect the detector to the auxiliary junction
box.
Unused cable entries on the auxiliary junction box must be sealed using a certified blanking
gland.
Diagram 5
If the IRmax are to be multi-dropped into an addressable network, RS485 Modbus enabled
IRmax must be connected to auxiliary junction boxes as shown in Diagram 5 above.
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Detecting Gas Saving Lives