5.2 Electrical connections
36 EB 8387-3 EN
Connections
DANGER!
Risk of the formation of an explosive atmosphere!
4
The following standard applies for assembly and installation in hazardous
areas: EN 60079-14 (VDE 0165 Part 1) Explosive atmospheres - Electrical
installations design, selection and erection.
Connection to conform with the type of protection Ex d (EN 60079-1):
The Type 3731-321 Positioner must be connected over the appropriate cable
glands or conduit systems which meet the requirements of EN 60079-1 (Electri
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cal apparatus for explosive gas atmospheres - Part 1: Flameproof enclosures
"d") Clauses 13.1 and 13.2 and for which a special test certificate exists.
Do not use simple types of cable glands or blanking plugs.
Seal any cable entries that are not used using blanking plugs approved for this
purpose for installations according to the type of protection Ex db.
Install the connecting line rigidly and ensure it is protected adequately from be-
ing damaged. In case the temperature exceeds 70 °C at the cable entries, use
appropriate temperature-resistant connecting cables.
Integrate the positioner into the equipotential bonding system on site.
Connection to conform with the type of protection Ex e (EN 60079-7):
The cable and cable entries or blanking plugs must be certified according to the
type of protection Ex e (ATEX) and for which a special test certificate exists.
Devices used at ambient temperatures below –20 °C must have metal cable en
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tries.
In cases where more than one cable core is connected to the same terminal,
make sure that each cable core is clamped adequately.
Two cables with varying cross-sections may only be connected to one terminal,
if this is not explicitly allowed in the documentation related to the electrical ap
-
paratus, when the two cables are secured with a common crimp sleeve before
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hand.
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