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18
5.3.1
Fitting and removal
Both modules have connectors that are designed to prevent an ignition-
capable spark when the module is installed or removed. The modules are not
interchangeable but the method of installing and removal is the same.
Do not use, or attempt to repair, a module that has any of the pins on its underside
bent or damaged, because this might affect its safety and will invalidate the
certification.
5.3.1.1
Mounting a module
Refer to Figure 5.4.
Orientate the module so that the smaller front clip is facing the user, then:
•
lower the module so that the safety retaining clip on the TTA housing fits into the
loop on the module
•
locate the terminal pins into their contact sockets on the TTA housing and
•
push the module home until front and rear retaining clips engage.
5.3.1.2
Removing a module
Refer to Figures 5.3 and 5.4 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 TTA.
•
Press the clip at the rear 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, then press down on the safety retaining clip enough
to release it and pull the module away from the TTA body without rotating or
twisting it.
Front clip
A contact
socket
Figure 5.4 - Mounting a module - e.g. Trunk Surge Protection module
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.
For addtional information refer to Section 4.6 on page 13.
Safety
retaining
clip
INM 9370-RD Rev 5
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