Siemens SIWAREX WP231 Manual page 27

Rule 4: Special EMC measures
● All inductors that are to be controlled should be connected with suppressors.
● For cabinet or enclosure lighting in the immediate range of your controller, use
incandescent lamps or interference suppressed fluorescent lamps.
Rule 5: Homogeneous reference potential
● Create a homogeneous reference potential and ground all electrical equipment.
● Use sufficiently dimensioned equipotential bonding conductors if potential differences
exist or are expected between your system components. Equipotential bonding is
absolutely mandatory for applications in hazardous areas.
SIWAREX WP231
Manual, 07/2014, A5E31238908A-02
Mounting
5.2 EMC-compliant setup
27