INM 937x-FB2-Px-SS Rev 1
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a) Loosen the two screws securing the pluggable, spur-wiring connector to the
carrier and unplug it.
b) Plug the Spur Surge module into the vacant socket on the carrier and tighten
the two fixing screws and its grounding screw, all to a recommended torque
of 0.4 Nm.
c) Loosen the spur cable gland.
d) Withdraw approximately 20 mm of the cable length from the enclosure.
e) Plug the spur connecting plug into its mating socket on the Spur Surge module
and tighten the fixing screws to a recommended torque of 0.4 Nm.
Make any final adjustments to the cable, to avoid any tension then tighten the spur
cable gland to clamp the cable to retain the IP rating of the enclosure.
5 .5 Trunk connections
WARNING !
No part of the Trunk Terminal Assembly may be worked while the
enclosure is powered, unless the environment is known to be
non-hazardous.
Before any work starts on the Trunk Terminal Assembly the trunk power to the
enclosure must be isolated, or a gas clearance certificate obtained.
Once the conditions are known to be safe, the protective plastic cover of the Trunk
Terminal area may be removed.
Refer to Section 4.2.1 for additional information about trunk wiring connections.
When any changes or checks have been carried out, ensure there are no loose
implements left inside the Trunk Terminal area before replacing its protective cover.
5 .6 Regular Maintenance checks
Check the general condition of the installation occasionally to ensure that no
deterioration has occurred. At least every two years (and more frequently for harsh,
dusty or dirty environments) check:
• the condition of all wire connections/terminations/screens.
• that all of the fixing and cover screws and blanking plugs are secure and the
breather is clear.
• that there are no signs of damage or corrosion.
• that the level of accumulated dust on the enclosure does not exceed 5mm.
WARNING !
If the outer enclosure of the apparatus needs to be cleaned, this should
be done with a non-electrostatic generating cloth lightly moistened by a
dilute mixture of detergent in water.
In addition, take advantage of plant maintenance shutdown periods or
whenever the
area is known to be non-hazardous,
to check wiring quality by confirming that the
dc voltage on the fieldbus trunk, when measured at the enclosure, is >16V. This can be
performed using a multimeter or an FBT-6 fieldbus tester.
