KROHNE ALTOFLUX IFM 4080 K EEx EN - Manual (Page 20)

19
Figure 13: Power supply version 115/230 Vac.
MODIS version IFC 090i-EEx
Before commencing work, note the instructions in Section 3.1 ("Before opening") .
Then continue as follows:
1. Remove the cover of the electronics compartment.
2. Unscrew the two screws A of the display unit and turn it carefully aside.
3. Disconnect the 2-pole field circuit connector (item B) and the 3-pole electrode circuit
connector (item C). See figure 11 on page 15 for details.
4. Unscrew the two screws D and screw SE by a screwdriver with a long shaft (200 mm).
Take out the electronics unit, but do not damage the connecting cables. See the note
marked with IMPORTANT (gray-shaded box) below.
5. The defective power fuse (see figure 14 on the next page) can be replaced now. Use a
fuse rated at T1.25H250V (part No. 5.06232.00.00) for the 24 Vac/dc power supply and a
fuse of T1.6H250V (part No. 5.07823.00.00) for the 100…230 Vac power supply. Notice
that the locations are slightly different (the 24 Vac/dc supply version is shown).
6. Reassemble in reverse order (points 4 through 1).
Note the instructions of section 3.1 ("After opening") during reassembling.
IMPORTANT !
Carefully keep the connecting cables of the field coil and electrode circuits to the side of
the housing, while removing respectively inserting the electronics unit into the signal
converter housing. This is to prevent damaging of the connecting cables !
Mains transformer
115/230 Vac version
Power fuse F1 (in fuse-holder)
Sticker with fuse rating
Voltage selector
SIDE OF DISPLAY UNIT
Indication of
voltage selector
(black dot = notch)