Samson TROVIS 3730-3, Mounting And Operating Instructions

Page: 83 / 180

EB 8384-3 EN 83
Mounting and start-up
5.15.4 Signal pressure (output)
The signal pressure at the output (38) of the
positioner can be restricted to 1.4 bar,
2.4 bar or 3.7 bar in Code 16.
The limitation is not activated [No] by de-
fault.
5.16 Electrical connections
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.
Risk of fatal injury due to the formation of
an explosive atmosphere.
The following regulations apply to installation
in hazardous areas: EN 60079-14
(VDE 0165, Part 1) Explosive Atmospheres –
Electrical Installations Design, Selection and
Erection.
Incorrect electrical connection will render the
explosion protection unsafe.
−
Adhere to the terminal assignment.
−
Do not undo the enameled screws in or on
the housing.
−
Do not exceed the maximum permissible
values specified in the EC type examina-
tion certificates when interconnecting in-
trinsically safe electrical equipment (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 certificate
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 applies additionally: For posi-
tioners in type of protection Ex tb
(Type 3730-35) and type of protection Ex nA
(Type 3730-38), the cable glands and blank
-
ing plugs must be certified according to
EN 60079-7 (Ex e).
Selecting cables and wires
Observe Clause 12 of EN 60079-14 for in-
stallation of the intrinsically safe circuits.
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 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 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)
DANGER !
WARNING !