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Bosch Rexroth AG
EMC Measures for Design and Installation
6.5
General Measures of Radio Interference Suppression for Re‐
lays, Contactors, Switches, Chokes and Inductive Loads
LSA Control S.L. www.lsa-control.com comercial@lsa-control.com (+34) 960 62 43 01
Rexroth IndraDrive Fc Drive Controllers Frequency Converters FCS01
If, in conjunction with electronic devices and components, inductive loads,
such as chokes, contactors, relays are switched by contacts or semiconduc‐
tors, appropriate interference suppression has to be provided for them:
●
By arranging free-wheeling diodes in the case of d.c. operation
●
In the case of a.c. operation, by arranging usual RC interference sup‐
pression elements depending on the contactor type, immediately at the
inductance
Only the interference suppression element arranged immediately at the in‐
ductance does serve this purpose. Otherwise, the emitted noise level is too
high which can affect the function of the electronic system and of the drive.
DOK-INDRV*-FCS01******-IT01-EN-P
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