Industrial, scientific and medical (ISM) equipment - radio-frequency disturbances; limits and methods of measurement.
The standard specifies radio-frequency disturbance limits and measurement methods for industrial, scientific and medical (ISM) equipment, including equipment intentionally generating RF energy for technological purposes. It classifies equipment into Groups 1 and 2 and Classes A and B according to application and operating environment.
It covers disturbance emissions; immunity is not included.
An EN 55011 Class A/B declaration documents the encoder's RF emission level; for installation on rolling stock, the designer compares it with the limits of EN 50121-3-2, which EN 55011 does not replace.
