IEC 62040-2:2016/ISH1:2018

INTERNATIONAL ELECTROTECHNICAL COMMISSION
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IEC 62040-2
Edition 3.0  2016-11
UNINTERRUPTIBLE POWER SYSTEMS (UPS) –

Part 2: Electromagnetic compatibility (EMC) requirements

INTERPRETATION SHEET 1
This interpretation sheet has been prepared by subcommittee 22H: Uninterruptible power
systems (UPS), of IEC technical committee 22: Power electronic systems and equipment.
The text of this interpretation sheet is based on the following documents:
FDIS Report on voting
22H/232/FDIS 22H/236/RVD
Full information on the voting for the approval of this interpretation sheet can be found in the
report on voting indicated in the above table.
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Interpretation of 5.3.2.4, Limits at the network ports
Introduction
Sub-clause 5.3.2.4 states that the network port limits applicable to UPS of category C1, C2
and C3 are located in Table 1, Table 2 and Annex C.
It was not clear whether 5.3.2.4 applies to network ports that originate and terminate within
the enclosure port of the UPS (i.e. to network ports connected exclusively to circuits or
devices forming an integral part of the UPS).
Interpretation
The network port limits in Table 1, Table 2 and Annex C apply only to network ports for
which connection to circuits or devices external to the enclosure port of the UPS is allowed.
This includes, without limitation, connection to PSTN, ISDN, xDSL and Ethernet networks.
The limits in Table 1, Table 2 and Annex C do not apply to network ports that originate and
terminate within the enclosure port of the UPS (i.e. to network ports connected exclusively
to circuits or devices forming an integral part of the UPS).

ICS 17.220; 29.200; 33.100.10
IEC 62040-2:2016-11/ISH1:2018-06(en-fr)

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COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
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IEC 62040-2
Edition 3.0  2016-11
ALIMENTATIONS SANS INTERRUPTION (ASI)
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