19
Action against high frequency interference
High frequency interference can occur for example as a result of out-of-phase switching operations.
Should such interference occur and lead to sporadic failures, we recommend the following actions in
order to suppress any interference.
n
Provide inductive loads with RC combinations according to manufacturer's specification to ensure
interference suppression.
n
Make sure that all connecting cables leading to the conductivity electrode are segregated and run
separately from power cables.
n
Increase the distance to sources of interference.
n
Check the connection of the screen. Check the connection of the screens of the equipment as stipu-
lated in the respective installation & operating manuals. If equipotential bonding currents are to be
expected (e. g. in outdoor installations) connect screen only at one end.
n
HF interference suppression by means of hinged-shell ferrite rings.
Further Notes
n
Switch off supply voltage and
cut off power supply to the equipment.
n
Remove the lower and upper terminal strips
Fig. 6
n
Insert a screwdriver to the right and left of the arrow markings between the terminal strip and the
front frame.
n
Unlock terminal strip on the left and right side For this purpose move screwdriver in direction of
the arrow .
n
Remove the terminal strip
n
Release the white fixing slide at the bottom of the equipment and take the equipment off the support-
ing rail.
Decommissioning / replacing the equipment
Disposal
For the disposal of the equipment observe the pertinent legal regulations concerning waste disposal.
If faults occur that are not listed above or cannot be corrected, please contact our service centre or
authorized agency in your country.
Fig. 6
