VEGA VEGAMET 381 Ex - Manual (Page 23)

23
5 Connecting to power supply
VEGAMET 381 Ex • 4 … 20 mA signal conditioning instrument
30418-01-131025
be opened.
Information:
Input mode active/passive: Before
mounting VEGAMET 381 Ex, set the
requested mode of the measuring data
input. With a slide switch on the rear of
the instrument you can choose between
active and passive current input (see
chapter "Input mode active/passive").
After mounting the instrument, the slide
switch is no longer accessible.
4.2 Mounting instructions
Front panel mounting
1. Make sure that the cutout required for
installation has a size of 92 x 92 mm
(3.63 x 3.63 in). The required installation
depth is min. 90 mm (3.54 in).
2. Remove the pluggable terminal strips from
the top and bottom.
3. Screw the threaded pin [3] into the rear of
the instrument and tighten with a screwdri-
ver.
4. Insert the instrument from the front into the
front panel [1].
5. Place the clamping strap [2] from the back
over the pin [3] and pull it with the knurled
nut [4] against the panel [1].
1
3 2 4
Abb. 11: Front panel mounting
1 Front panel
2 Clamping bracket
3 Pin
4 Knurled nut
Screw mounting
1. Insert the metal strap [1] from above into the
housing cut-out.
2. Fasten the instrument directly to the wall
with the three screws (max. ø 4 mm).
105
80
ø 4,5*
1
2
Abb. 12: Screw mounting
1 Metal strap
2 Covering slide switch active-passive
Carrier rail mounting
1. Place the adapter plate [1] to the rear of
VEGAMET 381 Ex (spring of the adapter
plate downward) and fasten the plate with
screw [2] (M4 x 6).
2. PlaceVEGAMET 381 Ex against the carrier
rail [3] from below and push the instrument
upward until it snaps in.
61
43,5
2 1 3
Abb. 13: Carrier rail mounting
1 Adapter plate
2 Screw (M4 x 6)
3 Carrier rail
5 Connecting to power
supply
5.1 Preparing the connection
Note safety instructions
Always keep in mind the following safety inst-
ructions:
•
Connect only in the complete absence of
line voltage
•
If overvoltage surges are expected, overvol-
tage arresters should be installed
Take note of safety instructions for Ex
applications
In hazardous areas you must take note
of the respective regulations, conformity
and type approval certificates of the