IEC TR 63203-250-1:2021

IEC TR 63203-250-1 ®
Edition 1.0 2021-06
TECHNICAL
REPORT
colour
inside
Wearable electronic devices and technologies –
Part 250-1: Electronic textile – Snap fastener connectors between e-textiles and
detachable electronic devices
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IEC TR 63203-250-1 ®
Edition 1.0 2021-06
TECHNICAL
REPORT
colour
inside
Wearable electronic devices and technologies –

Part 250-1: Electronic textile – Snap fastener connectors between e-textiles and

detachable electronic devices
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 59.080.80 ISBN 978-2-8322-9891-6

– 2 – IEC TR 63203-250-1:2021 © IEC 2021
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Classification of devices by connector type . 6
4.1 General . 6
4.2 Devices having two electrodes and using sockets of snap fasteners to
connect with the e-textile . 7
4.2.1 Size of the stud on the e-textile . 7
4.2.2 Distance between electrodes on the e-textile . 7
4.3 Devices with two electrodes using snap fastener studs to connect . 9
4.3.1 Size of the stud on the device . 9
4.3.2 Distance between the electrodes on the device . 9
4.4 Devices using snap fasteners to connect the e-textile, but having more than
two electrodes . 9
5 Summary . 11
5.1 Overview. 11
5.2 Standardization needs . 11

Figure 1 – a pair of typical snap fastener stud and socket . 7

Table 1 – Examples of devices using sockets as connector . 8
Table 2 – Examples of devices using two studs as connectors . 9
Table 3 – Examples of devices having many electrodes . 10

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
WEARABLE ELECTRONIC DEVICES AND TECHNOLOGIES –

Part 250-1: Electronic textile – Snap fastener connectors
between e-textiles and detachable electronic devices

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 activities, IEC publishes International Standards, Technical Specifications,
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IEC TR 63203-250-1 has been prepared by IEC technical committee 124: Wearable electronic
devices and technologies. It is a Technical Report.
The text of this Technical Report is based on the following documents:
Draft Report on voting
124/119/DTR 124/143/RVDTR
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Technical Report is English.

– 4 – IEC TR 63203-250-1:2021 © IEC 2021
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement,
available at www.iec.ch/members_experts/refdocs. The main document types developed by
IEC are described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts in the IEC 63203 series, published under the general title Wearable
electronic devices and technologies, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct
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INTRODUCTION
E-textiles are suitable for measuring biological signals such as electrocardiograms,
electromyograms and respiratory rates in everyday life without discomfort. The e-textile is
interwoven or coated with an electric material for sensing the body surface potential in order
to measure biological signals. To measure these biological signals, a detachable electronic
device is connected to measure the body surface potential from the e-textile.
However, there is no established standard on the method for connecting the detachable
electronic device to the e-textile. In view of the above circumstances and in order to
standardize connection interface issues, it is necessary to investigate the connector types
between e-textile and the detachable electronic device.
To date, conductive snap fasteners have been the most commonly applied as connectors for
e-textiles.
This document reviews conductive snap fastener connectors and gives some guidance for
future standardization work as regards connectors for e-textiles.

– 6 – IEC TR 63203-250-1:2021 © IEC 2021
WEARABLE ELECTRONIC DEVICES AND TECHNOLOGIES –

Part 250-1: Electronic textile – Snap fastener connectors
between e-textiles and detachable electronic devices

1 Scope
This document reviews the use cases of conductive snap fasteners applied as electrical
connectors for e-textile products available on the market and provides guidance on future
standardization works.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition cited
applies. For undated references, the latest edition of the referenced document (including any
amendments) applies.
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• ISO Online browsing platform: available at http://www.iso.org/obp
• IEC Electropedia: available at http://www.electropedia.org/
3.1
snap fastener
device for attaching one material to another consisting of matching male (stud) and female
(socket) parts, each of which is attached to a separate material so that the parts can be
joined by an appropriate force and separated by a sufficient perpendicular tensile force
3.2
stud
male functional part of a snap fastener which engages with, or snaps into, the mouth of the
socket to form a closure of two parts of the item, or garment on which the fastener is used
3.3
socket
female functional part of the fastener which engages with the stud part of the fastener to
form the closure of two parts of the item on which the fastener is used
4 Classification of devices by connector type
4.1 General
Snap fasteners may be used for connecting detachable electronic devices to e-textile
products.
Snap fasteners are already accepted in the e-textile industry.
The snap fastener consists of a socket and a stud. Snap fastener connectors are used taking
into account whether the device to be connected has a socket or a stud part of a snap
fastener already mounted on it. Snap fastener connectors are classified into two types
dependi
...