A Rationale for Susceptibility Limits for Commercial Digital Control Equipments

A rationale, based on a literature survey, has been developed to establish test limits for digital industrial control equipment intended to be installed in commercial buildings in urban and suburban areas. No widely accepted comprehensive susceptibility specification exists for such commercial equipments. This paper has attempted to incorporate the most relevant and realistic aspects of existing standards and suggested limits for other equipments and environments, modifying these where deemed necessary to reflect information found in the literature and our own engineering judgement. It is felt that designing equipments that they conform to these suggested limits will result in systems that will be compatible with EM environments that are likely to be encountered, without encountering unrealistic costs due to over-protection.