Samson FOUNDATION 3730-5, Mounting And Operating Instructions

Page: 55 / 132

EB 8384-5 EN 55
Connections
Selecting cables and wires
Observe clause 12 of EN 60079-14: 2008
(VDE 0165, Part 1) for installation of the
intrinsically safe circuits.
Clause 12.2.2.7 applies when running multi-
core cables and wires with more than one
intrinsically safe circuit.
The radial thickness of the insulation of a
conductor for common insulating materials
(e.g. polyethylene) must not be smaller than
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
ferrules. When two separate cables or wires
are used for connection, an additional cable
gland can be installed. Seal cable entries left
unused with plugs. Fit equipment used in
ambient temperatures
below –20 °C with
metal cable entries.
Equipment for use in zone 2/zone 22
In equipment operated according to type of
protection Ex nA II (non-sparking equipment)
according to EN 60079-15: 2003, circuits
may be connected, interrupted or switched
while energized only during installation,
maintenance or repair.
Equipment connected to energy-limited cir-
cuits with type of protection Ex nL (ener-
gy-limited equipment) according to
EN 60079-15: 2003 may be switched under
normal operating conditions.
The maximum permissible values specified
in the statement of conformity and its ad -
denda apply when interconnecting the
equipment with energy-limited circuits in
type of protection Ex nL IIC.
Cable entry
Cable entry with M20 x 1.5 cable gland.
See section on Accessories for clamping
range.
u
Option
+81 -82 IEC 1158-2 +87 -88 +85 -86 +41 -42 A B
24 V DC BE1 BE2
G
Forced venting func-
tion with solenoid
valve (optional)
Bus line
Binary contacts
(optional)
Switching amplifier
EN 60947-5-6
Inductive limit
switch (optional)
Leakage sensor
Fig. 20: Electrical connections