Samson 4763, Монтаж и эксплуатация

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3 Connections
3.1 Electrical connections
DANGER!
Risk of electric shock and/or the
formation of an explosive atmo-
sphere!
–
For electrical installation, observe the rel-
evant electrotechnical regulations and
the accident prevention regulations that
apply in the country of use.
– The following regulations apply to
mounting and installation in hazardous
areas: EN 60079-14: 2008 Explosive
atmospheres – Part 14: Electrical instal-
lations design, selection and erection (or
VDE 0165 Part 1).
NOTICE
– Adhere to the terminal assignment!
Switching the assignment of the electrical
terminals may cause the explosion pro-
tection to become ineffective!
– Do not loosen enameled screws in or on
the housing.
– The maximum permissible values speci-
fied in the national EC type examination
certificates apply when interconnecting
intrinsically safe electrical equipment (U
i
or U
o
; I
i
or I
o
; P
i
or P
o
; C
i
or C
o
, and L
i
or
L
o
).
Selecting cables and wires:
Observe Clause 12 of EN 60079-14: 2008
when installing intrinsically safe circuits. The
Subclause 12.2.2.7 applies when running
multi-core cables containing more than one
intrinsically safe circuit.
In particular, the radial thickness of the con-
ductor insulation for common insulation ma-
terials, such as polyethylene, must have a
minimum radial thickness of 0.2 mm.
The diameter of an individual wire in a
fine-stranded conductor must not be smaller
than 0.1 mm. Protect the conductor ends
against splicing, e.g. by using wire-end fer-
rules.
When two separate cables are used for con-
nection, an additional cable gland can be
installed.
Seal cable entries left unused with plugs.
Devices used at ambient temperatures
be-
low –20 °C must be fitted with metal cable
glands.
Equipment for use in zone 2/zone 22
In equipment operated with type of protec-
tion Ex nA II (non-sparking equipment) ac-
cording to EN 60097-15: 2003, circuits
may be connected, interrupted or switched
while energized only during installation,
maintenance or repair.
The wiring for the input signal is led using
cable glands to the terminals 11 (+) and 12
(–). The ground connection can be
connected inside or outside of the positioner
housing.
10
EB 8359-2 EN
Connections