KROHNE ALTOFLUX IFM 5080 K EEx EN - Manual (Page 9)

9
7.2 Replacement of the electronic unit
For part numbers of the electronic units, see sect. 8 of this addition.
The electronic units have been tested by Krohne conform the electrical safety codes involved.
Before commencing work, note the instructions in the grey shaded box "Important" at the
begin of section 7.
1. Remove the cover of the connection compartment by using the special wrench.
2. Remove screws R (see drawing in section 8.8 of the standard installation and operating
instructions) and fold the display board aside.
3. Remove the 2-pole connector X1 (field power) and the 3-pole connector for the electrode-
circuits mounted on the safety-barrier board.
4. Remove screws Q and the screw SE for the earthing strip at the backside of the electronic unit.
For latter screw a screwdriver for recessed-head screws (size 2, length of blade at least 200
mm) must be used. Carefully remove the electronic unit.
5. Relocate Dataprom IC18 on the amplifier PCB (see drawing in section 8.9 of the standard
Installation and operating instructions) carefully from the old to the new electronic unit. Note the
direction (position of pin 1) of IC18 while inserting it into the new socket.
6. Check the rating of the power supply fuse on the new electronic unit. If necessary, exchange.
7. Reassemble in reverse order (points 4 till 1). Note the instruction at the beginning of this
paragraph.
8 Part numbers
See following table.
The IFC090 i-EEx electronic units are only available in 24 V AC/DC power supply.
IFC090 i-EEx
version Part no. Power supply
fuse Part no. of fuse
Ex-i1 2.11582.01
Ex-i2 2.11582.03
Ex-i3 2.11582.02
Ex-i4 2.11582.04
Ex-i5 2.11582.05
Ex-i6 2.11582.06
T1,25 H 250V 5.06232.00