Emc-Compliant Installation - Grundfos SM 113 Montage- Und Betriebsanleitung

SM 113 can be removed by pushing the adapters
upwards and free off the DIN rail.
Fig. 4 Dismounting from DIN rail
SM 113 can also be built into the top cover of
a pump.
SM 113
Fig. 5 Built into a pump

2.4 EMC-compliant installation

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.
It is especially important to ensure an
EMC-compliant installation of pumps with
a frequency converter or when using more than
one pair of IO 113 and SM 113, no matter whether
SM 113 is built into a cabinet or the pump.
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. 6.
• 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.
IO 113
Fig. 6 Screen fixed with cable clamp, and both
IO 113 and SM 113 mounted in a cabinet
We recommend that you fix the screen of
the cable between IO 113 and SM 113 with
a cable clamp, no matter whether SM 113
is built into a cabinet or the pump.
CAUTION
Electric shock
Minor or moderate personal injury
All sensors in contact with phase voltage
must be double insulated according to
EN 61010-1.
P1 P2 P3 P4 P5 I1 I2 I3
14 13 12 11 10 9 8 7 6 5 4 3 2 1
SM 113
7