KROHNE IFC 090F Converter EEx-ATEX EN - Manual (Page 25)

ALTOFLUX IFC 090 F-EEx and ALTOFLUX IFC 090 F / i-EEx 25
Regular IFC 090-EEx with 100…230 Vac power supply
Note: Before commencing work, read the instructions in Sect. 5.1 ("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 the display unit carefully aside.
3. The fuse-holder, in which the power fuse in accordance with IEC 127-2 size Ø5 x 20 mm is
mounted, is now accessible to replace the defect power fuse F1 by a new fuse with the
same rating. The rating depends on the voltage setting of the power supply unit. The power
supply of 100/115 Vac requires a fuse of T200mA (part No. 5.05678.00.00) and the
200/230 Vac requires a fuse of T125 mA (part No. 5.06627.00.00).
The fuse rating is also shown by the yellow sticker that is glued on the mains transformer,
which can only be seen after the regular IFC 090-EEx electronics unit is completely
removed from the flameproof signal converter housing. See the next figure.
NOTE:
In case of any doubt about the fuse rating or the voltage setting of the unit, remove the
complete unit from the housing as described in Sect. 5.2 and check in the following
figure depicted items. Change when needed !
4.
Reassemble the unit in reverse order (points 2 and 1).
Note Read the instructions of Sect. 5.1 ("After opening") during reassembling.
Power supply version 115/230 Vac
Mains
transformer
Sticker with fuse
Voltage
l t
Side
of
dis
p
la
y unit
Indication of
voltage
selector
Power fuse F1
(in fuse holder)
Voltage selector