Siemens SIMATIC ET 200pro FC-2 Operating Instructions Manual page 251

Environment 1
An environment in which there are residential estates and facilities which are connected
directly to a public low-voltage supply network without the use of an intermediate
transformer.
Note
Example: Houses, apartments, commercial units or office rooms within a residential building.
Environment 2
An environment in which there are commercial estates and facilities which are not connected
directly to a public low-voltage supply network.
Note
Example: Developed commercial sites and other sites which are supplied by a transformer
provided specially for the purpose.
Class C1
Power drive system (PDS) with a rated voltage of less than 1000 V for use in residential
buildings.
Class C2
Power drive system (PDS) with a rated voltage of less than 1000 V, which is neither fitted
with a plug connector nor intended for (easy) transport and which, when used in residential
buildings, is designed solely for installation and commissioning by a specialist.
Note
A specialist is a person or organization with the necessary skills to install and/or commission
a power drive system (PDS) including its EMC aspects.
SIMATIC ET 200pro FC-2 converter
Operating Instructions, 04/2018, FW V4.7 SP10, A5E34257324B AF
11.5 Electromagnetic compatibility of the converters
Technical data
249