Samson 3730 Series - Electrical Connection

5-42 EB 8384-3 EN
Installation
5.12 Electrical connection
For electrical installation, observe the rele-
vant electrotechnical regulations and the ac-
cident prevention regulations that apply in
the country of use. In Germany, these are
theVDEregulationsandtheaccidentpre-
vention regulations of the employers’ liability
insurance.
Incorrect electrical connection will render
the explosion protection unsafe.
Î Adhere to the terminal assignment.
Î Do not undo the enameled screws in or
on the enclosure.
Intrinsic safety rendered ineffective in in-
trinsically safe devices.
Î Only connect intrinsically safe devices in-
tended for use in intrinsically safe circuits
to certied intrinsically safe input-con-
nected units.
Î Do not place intrinsically safe devices
back into operation that were connected
to intrinsically safe input-connected units
without certication.
Î Do not exceed the maximum permissible
electric values specied in the EC type
examination certicates when intercon-
necting intrinsically safe electrical equip-
ment (U
i
or U
0
, l
i
or I
0
, P
i
or P
0
, C
i
or C
0
and L
i
or L
0
).
The ambient temperature ranges of the ta-
blesintheECtypeexaminationcerticate
apply for the assignment between the per-
missible ambient temperature, temperature
class, maximum short-circuit currents and
maximum power P
i
and P
0
.
The following additionally applies: For posi-
tionersintypeofprotectionExtb(3730-35)
andtypeofprotectionExnA(3730-38),
the cable glands and blanking plugs must be
certiedaccordingtoEN60079-7(Exe).
Selecting cables and wires
Î Observe Clause12 of EN60079-14 for
installation of the intrinsically safe cir-
cuits.
Clause12.2.2.7applieswhenrunningmulti-
core cables or wires with more than one in-
trinsically 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ne-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 un-
used with plugs. Fit equipment used in ambi-
ent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(non-sparkingequipment)
WARNING
!
WARNING
!