Samson TROVIS 3730-3, Mounting And Operating Instructions

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84 EB 8384-3 EN
Mounting and start-up
according to EN 60079-15, circuits may be
connected, interrupted or switched while en-
ergized only during installation, mainte-
nance or repair.
The special conditions of use mentioned in
the statement of conformity are to be ob-
served for the rated values and the installa-
tion of the series-connected fuse for intercon-
nection of Ex nA circuits.
For Ex nA equipment (non-sparking equip
-
ment), circuits may be connected, interrupted
or switched while energized only during in-
stallation, maintenance or repair.
− Positioners with type of protection Ex nA
or Ex tc can be used with a closed cover
(no window) or or with a cover with win-
dow.
−
The Types 3730-31, 3730-35 and 3730-
38 Positioners are 100 % identical in de
-
sign, except for the marking and the
housing cover.
− For type of protection Ex nA, the VCC
connection in the interface adapter must
be connected in series with a fuse ac-
cording to IEC 60127, 250 V F or T with
a fuse rating of I
N
≤40 mA.
−
The signal current circuit must be con-
nected in series with a fuse according to
IEC 60127-2/VI, 250 V T with a fuse
rating of I
N
≤63 mA.
− The transmitter current circuit must be
connected in series with a fuse according
to IEC 60127-2/VI, 250 V T with a fuse
rating of I
N
≤40 mA.
The fuses must be installed outside the haz-
ardous area.
Cable entry
Cable entry with M20x1.5 cable gland, 6 to
12 mm clamping range.
There is a second M20x1.5 threaded hole in
the housing that can be used for additional
connection, when required. The screw termi-
nals are designed for wire cross-sections of
0.2 to 2.5 mm². Tighten the screws by 0.5 to
0.6 Nm.
The wires for the set point must be connect-
ed to the terminals 11 and 12 located in the
housing.
Only use a
current source . OVERLOAD ap -
pears on the display when the set point ex-
ceeds 22 mA.
The connection of a voltage source (U ≥ 7 V
or U ≥ 2 V when connected to the wrong
pole) can damage the positioner.
Only use a current source and never a volt -
age source!
In general, it is not necessary to connect the
positioner to a bonding conductor. Should
this be required, however, this conductor can
be connected inside the device.
Depending on the version, the positioner is
equipped with
inductive limit switches and/
or a solenoid valve .
The position transmitter is operated on a
two-wire circuit. The usual supply voltage to
NOTICE !