Dear compliance colleagues,

I just received the (german translation of) EN61326-1.

This standard applies to various classes of apparata, but also to
IPMC,i.e. industrial-process measurement and control apparata, such as
PLCs, displays, etc.

This new standard applies to apparata for INDUSTRIAL ENVIRONMENT
but requires an immunity which corresponds to EN50082-1 (domestic
environment). The requirements of the generic standard for industrial
environment, EN50082-2,  are much higher.

Examples:

ESD:
   EN50082-2 : 6kV/8kV
   EN61326-1 : 4kV/4kV
EM fields
   EN50082-2 : 10V/m
   EN61326-1 : 3V/m
HF conducted:
   EN50082-2 : 10V
   EN61326-1 : 3V
burst on AC supply
   EN50082-2 : 2kV
   EN61326-1 : 1kV

The question which arises is, how to build an equipment which has to
comply with EN50082-2 using display, PLCs etc. which comply only with
these lower immunity requirements.

Even if it could be assumed that cabinets provide some attenuation for
EM fields and conducted disturbances (e.g. using filters ), displays
should
have an immunity of 6kV against ESD since they can be accessed
from "outside".

Any comments welcome.


Greetings


Georg Dancau

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