English (GB)
5
3.4 EMC-compliant installation
It is especially important to ensure EMC-compliant
installation of pumps with a frequency converter or
when using more than one IO 113 in a cabinet.
The following rules must be observed:
•
Connect the cable screen to earth.
•
Do not twist screen ends as this will destroy the
screening effect at high frequencies. Use cable
clamps as shown in fig.
.
•
Ensure a good electrical contact from the
mounting plate through the mounting screws to
the metal cabinet of the frequency converter.
•
Use toothed washers and a galvanically
conducting mounting plate.
Fig. 3
Screen fixed with cable clamp
If the motor cable between the pump and
any frequency converter is more than 10
metres long, we recommend that you
equip the frequency converter with an
output filter to prevent incorrect analog
measurements.
TM
05
40
56
20
12
Screen both ends of the motor cable to
earth. The insulating plastic layer between
screen and sheath must be as close to the
terminals as possible.
P1 . . . P5
I1 I2 I3
