IEC 62368-3 pdf download

IEC 62368-3 pdf download.AUDIO/VIDEO, INFORMATION AND COMMUNICATION TECHNOLOGY EQUIPMENT – Part 3: Safety aspects for DC power transfer through communication cables and ports
1 Scope
This part of IEC 62368 applies to equipment intended to supply and receive operating power through communication cables or ports. It covers particular requirements for circuits that are designed to transfer DC power from a power sourcing equipment (PSE) to a powered device (PD). The power transfer uses voltages at ES1 or ES2 or in very specific cases voltage levels at ES3. NOTE 1 ES1 can generally be assumed to have similar limits as non-hazardous voltage definitions used in other standards (for example, SELV, PELV). NOTE 2 ES2 can generally be assumed to have similar limits for single fault conditions as non-hazardous voltage definitions used in other standards. NOTE 3 PS2 circuits are generally expected to provide less than 1 00 W to an undefined load under both normal operating conditions and single fault conditions. EXAMPLES – For power transfer using voltages at ES1 : USB, PoE, ISDN S0, etc. – For power transfer using voltages at ES2: analogue telephone during ringing, ISDN U, etc. – For power transfer using voltages at ES3: power feeding used by communications service providers and utilities communication circuits (for example, RFT circuits, such as line powered HDSLx, SHDSLx, VDSLx and G.fast). NOTE 4 Any cable provided with a connector defined by an industry standard that permits DC power transfer between equipment is considered a communication cable even if communication does not take place. For example, a USB cable can be used just to recharge a portable device battery. This group safety publication is primarily intended to be used as a product safety standard for the products mentioned in the scope, but shall also be used by technical committees in the preparation of standards for products similar to those mentioned in the scope of this standard, in accordance with the principles laid down in IEC Guide 1 04 and lSO/lEC Guide 51 . One of the responsibilities of a technical committee is, wherever applicable.
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 62368-1 :201 4 and the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: – IEC Electropedia: available at http://www.electropedia.org/ – ISO Online browsing platform: available at http://www.iso.org/obp 3.1.1 power sourcing equipment PSE equipment, other than dedicated external power supply units intended to supply specific equipment within the scope of IEC 62368-1 , supplying DC power to other equipment through communication cables or ports Note 1 to entry: It should be noted that the IEEE 802.3-201 5 standard has a similar but different definition. Note 2 to entry: This note applies to the French language only. 3.1.2 powered device PD equipment supplied DC power by a PSE through communication cables or ports Note 1 to entry: It should be noted that the IEEE 802.3-201 5 standard has a similar but different definition. Note 2 to entry: Some in line devices may just function as a PSE to inject power into the cable connecting to PD equipment. IEEE 802.3-201 5 identifies such devices as Midspan PSE. Note 3 to entry: Some PD equipment may also have a PSE output to pass on unused power to other PD equipment. Note 4 to entry: This note applies to the French language only.3.1.3 information and communication technology network ICT network metallically terminated transmission medium and its associated equipment and communication cables Note 1 to entry: The cable consists of two or more conductors intended for communication and/or power transfer between the various pieces of equipment. The equipment may be located within the same or separate structures, buildings or locations, excluding: – the mains system for supply, transmission and distribution of electrical power, if used as a communication transmission medium; – a dedicated HBES/BACS network. Note 2 to entry: This may include twisted pairs, and may include circuits, that are subjected to transients as indicated by ID1 in Table 1 4 of IEC 62368-1 :201 4 (assumed to be 1 ,5 kV). Note 3 to entry: An ICT network may be: – publicly or privately owned; – subject to longitudinal (common mode) voltages induced from nearby power lines or electric traction lines.