Reliability/Safety 2.5 Electromagnetic compatibility 2.5.1 Definition Electromagnetic compatibility is the ability of a device to function satisfactorily in its electromagnetic environment wi- thout itself causing any electromagnetic interference that would be intolerable to other devices in this environment Of all known phenomena of electromagnetic noise, only a certain range occurs at the location of a given device. This noise depends on the exact location. It is defined in the re- levant product standards.
The international standard regulating construction and de- gree of noise resistance of programmable logic controllers is IEC 1131-2 which, in Europe, has been the basis for Eu- ropean standard EN 61131-2. 2.5.2 Resistance to interference Ш Electrostatic discharge, ESD in acc. with EN 61000-4-2, 3 Ш Irradiation resistance of the device, HF in acc. with EN 61000-4-3, 3 rd degree of sharpness rd degree of sharpness Ш Fast transient interference, burst in acc. with EN 61000-4-4, 3 Ш Immunity to damped oscillations in acc. with EN 61000-4-12 (1 MHz, 1 kV) rd degree of sharpness 17