Samson 3730 Series - Page 81

EB 8384-3 EN 5-43
Installation
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 must 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coverwithor
without window.
− TheType3730-31,Type3730-35and
Type3730-38Positionersare100%
identical in design, except for the mark-
ing 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(seeaccessoriesin
Table 5-4).
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 connected
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) at terminals 11 and 12 will damage
the positioner.
Î Only connect a voltage source and never
a current source.
In general, it is not necessary to connect the
device to a bonding conductor. However, if it
is to be connected, it can be connected ei-
ther to the terminal for equipotential bonding
inside or outside 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
terminals31and32is24VDC.Takingthe
NOTICE
!