The Honeywell Enraf Prover Series
viii SVP Controller Operation Manual Part No.: 44200004 - Revision 2
Warning – Risk of Explosion
Do not open any of the electronics enclosures when an explosive
atmosphere may be present.
Warning – Risk of Explosion
Explosion proof (Ex d) compound cable glands or conduit sealed directly at
all cable entries must be used.
Which type depends on local & national requirements and legislation. For
the SVP Controller these glands and seals are installed at the factory.
Warning – Risk of Explosion
Unused cable entries must be sealed with an approved metric or NPT
threaded stopping (“Stopper”) plugs. Take care to select whichever is
appropriate and contact Honeywell Enraf in case of doubt. Improper
installation of cable glands, conduit or stopping plugs will invalidate the
Ex approval.
Warning – Risk of Explosion
Intrinsically safe connections to the SVP are factory wired. No unauthorized
changes are allowed as these would invalidate the approval.
The LAD and the SVP Controller are intrinsically safe devices and as
such may only be connected to devices with compatible intrinsically safe
parameters. Intrinsically safe cabling may only be connected to the outside
5 pin socket of the SVP Controller. Connection of non-intrinsically safe
signals will invalidate the approval. The electrical data of the intrinsically
safe circuits is to be taken from the ATEX/IECEx certificates (numbers see
below) which are shipped with the instruments.
Warning – Risk of Explosion
In order to withstand the explosion pressure the bolts of the SVP Controller
lid must be fastened hand-tight (approximately 13.5 to 17.6 Nm [10 to 13
Lbf-Ft]) but don’t overtighten so as not to damage the threads.
Warning – Risk of Explosion
For ensuring intrinsic safety, ground connection of one of the internal
boards to the enclosure and the box to the local grounding system is
crucial. The former is done at the factory but the local grounding is required
to ensure compliant installation.
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