Samson 3731-5, Mounting And Operating Instructions

Page: 45 / 112

EB 8387-5 EN 45
Mounting and start-up
5.11 Electrical connections
Risk of fatal injury due to the formation of
an explosive atmosphere.
For installation in hazardous areas, observe
the relevant standards that apply in the coun
-
try of use.
Standard applicable in Germany:
EN 60079-14: 2008 (VDE 0165, Part 1) Ex-
plosive Atmospheres – Electrical Installations
Design, Selection and Erection.
Connection with type of protection Ex d ac -
cording to EN 60079-1:
Connect the Type 3731-321 Positioner using
suitable cable entries or conduit systems that
comply with EN 60079-1 Explosive Atmo-
spheres – Part 1: Equipment Protection by
Flameproof Enclosures "d", Clauses 13.1
and 13.2 and for which a separate test cer-
tificate is available. Do not use cable glands
and blanking plugs of simple construction.
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For installation according to the type of
protection Ex db, seal cable entries left
unused with plugs certified for this pur-
pose.
Install the connecting cable properly so that
it is protected against mechanical damage. If
the temperature at the inlet parts exceeds
70 °C, use a temperature-resistant connect-
ing cable.
Include the positioner in the on-site equipo-
tential bonding system.
DANGER !
Connection with type of protection Ex e ac -
cording to EN 60079-7:
Cable entries and the blanking plug must be
certified according to type of protection Ex e
according to ATEX and possess a separate
test certificate.
Use metal cable glands for ambient tem-
peratures below –20 °C.
If more than one cable core is connected to
the same terminal, make sure that each core
is clamped adequately.
If it is not explicitly allowed in the documen-
tation relating to the electrical equipment,
two cables with different cross-sections may
only be connected to one terminal after be-
ing secured with a common crimp sleeve.
Connection with type of protection Ex i ac -
cording to EN 60079-11:
For connection to a certified, external intrin-
sically safe circuit, the terminal compartment
of the positioner may be opened within the
hazardous area.
Only the terminal compartment is to be
opened within the hazardous area to con-
nect it to a certified intrinsically safe circuit.
Î
Positioners that are connected to non-
intrinsically safe circuits are no longer
permitted to be used as intrinsically
safe equipment.
Î
The degree of protection (IP rating) of
the cable entries and the blanking plug
must be the same as that of the posi -
tioner.