prEN IEC 63315:2025

SLOVENSKI STANDARD
01-december-2025
Avdio/video, informacijska in komunikacijska tehnološka oprema - Varnost -
Prenos enosmerne napetosti med vrati opreme IKT z uporabo ožičenja IKT in
kablov pri napetostih, ki ne presegajo 60 V enosmerne napetosti
Audio/video, information and communication technology equipment – Safety – DC power
transfer between ICT equipment ports using ICT wiring and cables at voltages not
exceeding 60 V DC
Ta slovenski standard je istoveten z: prEN IEC 63315:2025
ICS:
33.160.01 Avdio, video in avdiovizualni Audio, video and audiovisual
sistemi na splošno systems in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

108/851/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 63315 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-10-10 2026-01-02
SUPERSEDES DOCUMENTS:
108/840/NP, 108/846/RVN
IEC TC 108 : SAFETY OF ELECTRONIC EQUIPMENT WITHIN THE FIELD OF AUDIO/VIDEO, INFORMATION TECHNOLOGY AND COMMUNICATION
TECHNOLOGY
SECRETARIAT: SECRETARY:
United States of America Ms Valara Davis
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
TC 23, TC 34, TC 61, TC 62, TC 72, TC 100 TC 108 Horizontal Group Safety
ASPECTS CONCERNED:
Safety
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of CENELEC,
is drawn to the fact that this Committee Draft for Vote (CDV) is
submitted for parallel voting.
The CENELEC members are invited to vote through the CENELEC
online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they are aware
and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries” clauses to be
included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for submitting ISC clauses. (SEE
AC/22/2007 OR NEW GUIDANCE DOC).
nex A
TITLE:
Audio/video, information and communication technology equipment – Safety – DC power transfer between ICT
equipment ports using ICT wiring and cables at voltages not exceeding 60 V DC

PROPOSED STABILITY DATE: 2029
NOTE FROM TC/SC OFFICERS:
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108/851/CDV
Link to Committee Draft for Vote (CDV) online document:
https://osd.iec.ch/#/editor/archive/35bc1c6a-32c8-9e36-e063-dd13000ac89e/en/CCDV/1

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(NMC) comments. The project draft may be found further down this document.

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i
IEC CDV 63315 © IEC 2025
CONTENTS
FOREWORD . 3
Introduction. 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Abbreviated terms . 10
5 Electrically-caused injury, electrical sources and safeguards . 10
6 Electrically-caused fire, power sources and safeguards . 10
6.1 General requirements . 10
6.2 Normal operating conditions. 11
6.2.1 PSE . 11
6.2.2 PD . 12
6.3 Circuit safeguards . 12
6.3.1 DC power transfer through a remote ICT interface . 12
6.3.2 DC power transfer through a local ICT interface . 12
6.3.3 PSE output current in abnormal condition and single fault condition
(during interconnection to other equipment) . 13
6.3.4 Voltage limits for PSE under abnormal operating conditions from
external loads . 14
6.4 Supplementary safeguards during single fault conditions in the PSE . 14
6.4.1 Voltage limits for PSE under fault conditions . 14
6.4.2 Supplementary Safeguard for the PD during a PSE overvoltage single
fault condition . 16
6.5 Protocol safeguards . 16
6.5.1 General . 16
6.5.2 Data packet negotiated power systems safeguard requirements for PSE
rated output above 100 W . 17
6.5.3 Protocol updates . 18
Annex A (informative) Examples of common interfaces which are in or out of the
scope of this document . 19
Annex B (informative) Example behaviours of non-static power sources and qualified
loads . 20
B.1 Non-static power sources . 20
B.2 Qualified loads . 20
Annex C (informative) Rationale for 6.3 and 6.4 . 22
Annex D (informative) Rationale and examples of communication errors and protocol
safeguards . 24
D.1 Rationale for 6.5 . 24
D.1.1 General . 24
D.1.2 Software Architecture and software faults . 24
D.1.3 Soft errors . 24
D.1.4 Protocol elements and supplemental information . 24
D.1.5 Cable marker . 26
D.1.6 Source reference . 27
D.2 Typical relationships between errors and protocol safeguards . 27
D.3 Communication errors . 28
D.3.1 General . 28
IEC CDV 63315 © IEC 2025
D.3.2 Corruption . 28
D.3.3 Unintended repetition . 28
D.3.4 Incorrect sequence . 28
D.3.5 Loss . 29
D.3.6 Unacceptable delay . 29
D.3.7 Insertion . 29
D.3.8 Masquerade . 29
D.3.9 Addressing . 29
D.4 Protocol safeguards . 29
D.4.1 General . 29
D.4.2 Sequence number . 29
D.4.3 Time stamp . 29
D.4.4 Time expectation . 30
D.4.5 Connection authentication . 30
D.4.6 Feedback message . 30
D.4.7 Data integrity assurance . 30
D.4.8 Redundancy with cross checking . 30
D.4.9 Different data integrity assurance systems . 30
Annex E (informative) Communication errors and USB Power Delivery protocol
safeguards . 32
E.1 General . 32
E.2 USB PD example walk-through . 33
Bibliography . 37

Figure 1 – PSE maximum sustained output fault voltage limit. 15
Figure E.1 – Block diagram of daisy chained USB devices . 33
Figure E.2 – Flowchart of USB power modes . 35

Table 1 – . 10
Table 2 – Overview of electrically-caused fire clauses for PSE’s (3.2) and PD’s (3.3) . 11
Table 3 – Current limits in abnormal conditions and single-fault conditions for PSE
(3.2) output circuits when no fault current value exists . 14
Table 4 – Voltage limits in single-fault conditions for PSE output circuits when no fault
voltage value exists . 15
Table D.1 – Overview of the effectiveness of the various measures on the possible
errors . 27
Table E.1 – Communication error types and USB PD protocol safeguards . 32
Table E.2 – Examples of different USB PD power modes and how limits are derived . 34

IEC CDV 63315 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Audio/video, information and communication technology equipment –
Safety – DC power transfer between ICT equipment ports using ICT wiring
and cables at voltages not exceeding 60 V DC

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for
standardization comprising all national electrotechnical committees (IEC National Committees).
The object of IEC is to promote international co-operation on all questions concerning
standardization in the electrical and electronic fields. To this end and in addition to other
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Standardization (ISO) in accordance with conditions determined by
...