INM 937x-FB2-Px-SS Rev 1
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5 .3 .1 .1
Mounting a module
Refer to Figure 5.3.
Orientate the module so that the smaller front clip is facing the trunk terminals, then:
• push the module so that the safety retaining clip on the carrier housing fits into
the loop on the module
• locate the terminal pins into their contact sockets on the carrier housing and
• push the module home until front and rear retaining clips engage.
5 .3 .1 .2
Removing a module
Refer to Figures 5.2 and 5.3 for further information.
Removal is a two-step process that first breaks the electrical connection, followed by
the physical removal of the module from the housing.
• Press the clip at the top of the module and tilt the module forward until the clip
disengages at the rear
• Press the front clip and withdraw the module from its socket until it is stopped
by the safety retaining clip
• Press down on the safety retaining clip enough to release it, then pull the
module away from the carrier housing without rotating or twisting it.
5 .4 Spur connections
All of the spur connections are intrinsically safe and therefore may be live-worked
in a hazardous area without ‘gas clearance’, while complying with normal ‘permit to
work’ procedures.
If spur wiring is removed from a connecting plug, ensure that the same polarity is
observed when it is reconnected.
5 .4 .1 Removing a Spur Surge module & spur cable adjustment
If an FS32 Spur Surge module needs to be removed from circuit, it will probably be
necessary to increase the cable length inside the enclosure slightly to allow the spur
wiring connector to be plugged into the circuit board. Use the following procedure.
a) Loosen the two screws securing the pluggable, spur-wiring connector to the
Spur Surge module and unplug it.
b) Loosen all three of the Spur Surge module’s fixing screws and unplug it from
the carrier.
c) Loosen the spur cable gland.
d) Pull an additional 20 mm (approx.) of additional cable length into the enclosure.
e) Plug the spur connecting plug into its mating socket on the barrier carrier and
tighten the fixing screws to a recommended torque value 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 .4 .2 Adding a Spur Surge module & spur cable adjustment
If an FS32 Spur Surge module is added, it will probably be necessary to reduce the
cable length inside the enclosure slightly when connecting the spur wiring connector
to the Spur Surge module. Refer also to Section 4.6.1 for further fitting details.
