UNE-EN IEC 61326-3-2:2018

This part of IEC 61326 covers all equipment within the scope of IEC 61326-1, but is limited to

systems and equipment for industrial applications within a specified electromagnetic

environment and intended to perform safety functions as defined in IEC 61508 with SIL 1-3.



The electromagnetic environments encompassed by this product family standard are

industrial, both indoor and outdoor, and based on the requirements of the process industry,

specifically chemical/petrochemical/pharmaceutical manufacturing plants using the mitigation

measures given in Annex C. The difference between the electromagnetic environment

covered by this standard compared to the general industrial environment (see IEC 61326-3-1)

is due to the mitigation measures employed against electromagnetic phenomena leading to a

specified electromagnetic environment with test values that have been proven in practice.



The environment of industrial application with a specified electromagnetic environment

typically includes the following characteristics:

industrial area with limited access;

limited use of mobile transmitters;

dedicated cables for power supply and control, signal or communication lines;

separation between power supply and control, signal or communication cables;

factory building mostly consisting of metal construction;

overvoltage/lightning protection by appropriate measures (for example, metal construction of the building or use of protection devices);

pipe heating systems driven by a.c. main power;

no high-voltage substation close to sensitive areas;

presence of CISPR 11 Group 2 ISM equipment using ISM frequencies only with low power;

competent staff;

periodical maintenance of equipment and systems;

mounting and installation guidelines for equipment and systems.



Equipment and systems considered as proven-in-use according to IEC 61508 or prior use

according to IEC 61511 are excluded from the scope of IEC 61326-3-2.



Fire alarm systems and security alarm systems intended for protection of buildings are

excluded from the scope of IEC 61326-3-2.