Com-Power LI-125 Line Impedance Stabilization Network (LISN)

EN 55011 is a product family standard (largely based on CISPR 11) for industrial, scientific and medical (ISM) equipment and electro-discharge machining (EDM) and arc welding equipment. This standard sets forth procedures for the measurement of radio-frequency (RF) disturbances and limits within the frequency range of 9 kHz to 400 GHz. Requirements for ISM lighting apparatus and UV irradiators operating at frequencies within the ISM frequency bands defined by the ITU Radio Regulations are also contained in EN 55011. ISM equipment or appliances tested against EN 55011 under the EMC Directive are designed to generate and use locally, RF energy for industrial, scientific, medical, domestic or similar purposes, excluding applications in the field of telecommunication. Typical ISM applications are the production of physical, biological, or chemical effects such as heating, ionization of gases, mechanical vibrations, hair removal and acceleration of charged particles. Compliance with this standard gives a partial presumption of conformity with the European EMC Directive, 2004/108/EC. EN 55011 is an emission only standard covering radiated and conducted emissions. Most products will also require an assessment of immunity standards, such as: (1) EN 61326-1 – Electrical equipment for measurement, control, and laboratory use; or (2) EN 61000-6-2 – Generic Standards Immunity for industrial environments. These aforementioned two specifications contain additional requirements for electromagnetic interference and transient phenomenon. Additionally, devices powered via AC mains may require additional testing for power line harmonics and power line flicker. Although the term medical is in the title of this standard, EN 55011 does not apply directly to medical devices within the scope of the Medical Device Directive 93/42/EEC. The reason is that for medical devices falling within the scope of 93/42/EEC, the EMC directive does not apply directly, but

EN 55022 is a modified derivative of CISPR 22 that applies to information technology equipment (ITE) as defined as any equipment: – Which has a primary function of either (or a combination of) entry, storage, display, retrieval, transmission, processing, switching or control of data and of telecommunication messages and which may be equipped with one or more terminal ports typically operated for information transfer; – With a rated supply voltage not exceeding 600 V. Procedures are given for the measurement of the levels of spurious signals generated by the ITE and limits are specified within the standard for protection of radio services in industrial, commercial or residential environments in the frequency range of 9 kHz to 400 GHz for both class A and class B equipment. The intention of this publication is to establish uniform requirements for the radio disturbance level of the equipment contained in the scope, to fix limits of disturbance, to describe methods of measurement and to standardize operating conditions and interpretation of results. Compliance with this standard gives partial presumption of conformity with the European EMC Directive, 2004/108/EC. Most products will also require assessment to the companion standard EN 55024, for immunity to electromagnetic interference and transient phenomenon. Additionally, devices powered via the AC mains, may require additional testing for power line harmonics and power line flicker. Information Technology Equipment (ITE), as would be tested for EN 55022, includes computer hardware and software, operating systems, web-based information and applications, telephones and other telecommunications products, video equipment and multimedia products, information kiosks, and office products such as photocopiers and fax machines. All European Standards, including EN 55022, are shaped by consensus among enterprises, public authorities, consumers, and trade unions, through a consultation process