Siemens SINAMICS DCM Manual page 97

Connecting
6.1 Instructions for EMC-compliant drive installation
EMC planning
If two devices are not electromagnetically compatible, you can reduce the interference
emission level of the source of interference or increase the interference immunity of the
potentially susceptible equipment. Sources of interference are generally power electronics
devices with high power consumption; reducing their interference emission levels requires
complex filters. Potentially susceptible equipment usually refers to control gear and sensors,
including their evaluation circuit. There is less work involved in increasing the interference
immunity of inefficient devices, meaning that - economically speaking - increasing
interference immunity is generally a more favorable option for industrial applications than
reducing the interference emission level.
In industrial applications, EMC between devices should be based on a carefully-balanced
combination of the interference emission and interference immunity levels.
The most cost-effective measure that can be put in place to achieve EMC conformance is to
physically separate sources of interference and potentially susceptible equipment - provided
that you have taken this option into account during the planning stage of your machine/plant.
In the first instance, it is necessary to determine whether each device used is a potential
source of interference or potentially susceptible equipment. Within this context, converters
and contactors, for example, can be counted as sources of interference, while examples of
potentially susceptible equipment are PLCs, encoders, and sensors.
The components in the control cabinet (sources of interference and potentially susceptible
equipment) must be physically separated, by means of partition plates if necessary, or by
installing them in metal enclosures.
6.1.2 EMC-compliant drive installation (installation instructions)
General information
Not only are drives operated in a wide variety of environments, but the electrical components
used (controllers, switch mode power supplies, and so on) can also differ widely with respect
to interference immunity and interference emission levels, meaning that all installation
guidelines of any kind can offer is a practical compromise. For this reason, EMC rules do not
need to be implemented to the letter in all cases, provided that measures are tested on a
case-by-case basis.
In order to ensure electromagnetic compatibility (EMC) in your control cabinets in rugged
electrical environments and adhere to the standards required by the relevant legislating
body, the EMC rules listed below should be followed during the construction and design
stages.
Rules 1 to 10 apply on a general level. Rules 11 to 15 must be followed in order to fulfill
interference emission standards.
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Operating Instructions, 02.2015, A5E34763375/RS-AA/001
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SINAMICS DCM DC Converter