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DS/EN 300 132-2 V2.5.1:2016
Environmental Engineering (EE);*Power supply interface at the input to*telecommunications and datacom (ICT) equipment;*Part 2: Operated by -48 V direct current (dc)
The present document contains requirements and measurements methods for the physical interface that is situated*between the power supply system(s) and the power consuming telecommunications and datacom (ICT) equipment; this*point is called interface "A" as defined in clause 4.*The purpose of the present document is to use a power supply system with the same characteristics for all*telecommunications and datacom (ICT) equipment defined in the area of application:*- to facilitate inter working of different (types of) load units;*- to facilitate the standardization of telecommunications and datacom (ICT) equipment;*- to facilitate the installation, operation and maintenance in the same network of telecommunications and*datacom (ICT) equipment and systems from different origins.*The present document aims at providing electrical compatibility between the power supply equipment and the power*consuming telecommunications and datacom (ICT) equipment, and also between different system blocks connected to*the same power supply.*The requirements are defined for:*- the output of the power supply equipment or power supply installation of telecommunications centres*providing power at the interface "A";*- the power supply input of any type of telecommunications and datacom (ICT) equipment installed at*telecommunication centres that are connected to interface "A" powered by DC;*- any type of telecommunications and datacom (ICT) equipment, installed in access networks and*customers' premises, the DC interface "A" of which is also used by equipment requiring a supply to the present*document.*- any type of telecommunication and datacom (ICT) equipment powered by DC, used in the fixed and mobile*networks installed in different locations as building, shelter, street cabinet.*Disturbances on the power supply interface "A" relating to the continuous wave phenomena below 20 kHz are covered*within the present document.*The present document does not cover safety requirements, they are covered by relevant safety standards.*The present document does not cover EMC requirements, they are covered by relevant EMC standards.*NOTE 1: The present document is applicable only to -48 VDC power supply interfaces. However, during a*transitional period, other DC voltages may be used in existing installations. Annex B gives guidance on*working in conjunction with existing -60 VDC supply systems.*NOTE 2: The DC voltage at interface "A" may be derived from the AC primary supply. The DC supply may*incorporate a backup battery
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Danish Standards [ds]
