EN 60947-5-6:2000

SLOVENSKI SIST EN 60947-5-6:2000
prva izdaja
STANDARD
junij 2000
Low-voltage switchgear and controlgear - Part 5-6: Control circuit devices and
switching amplifiers (NAMUR)
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29.130.20
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NORME CEI
INTERNATIONALE IEC
60947-5-6
INTERNATIONAL
Première édition
STANDARD
First edition
1999-12
Appareillage à basse tension –
Partie 5-6:
Appareils et éléments de commutation
pour circuits de commande –
Interface à courant continu pour capteurs de
proximité et amplificateurs de commutation (NAMUR)
Low-voltage switchgear and controlgear –
Part 5-6:
Control circuit devices and switching elements –
DC interface for proximity sensors and switching
amplifiers (NAMUR)
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60947-5-6 © IEC:1999 – 3 –
CONTENTS
Page
FOREWORD . 5
Clause
1 Scope. 7
2 Normative references . 7
3 Definitions . 7
4 Classification.11
5 Characteristics . 13
5.1 Control input of the switching amplifier . 13
5.2 Interaction between proximity sensor and switching amplifier . 13
5.3 Continuous characteristic . 13
5.4 Discontinuous characteristic . 13
5.5 Switching current difference . 13
5.6 Line resistance . 13
5.7 Insulation resistance. 13
6 Product information . 15
6.1 Proximity sensors . 15
6.2 Switching amplifiers. 15
7 Normal service, mounting and transport conditions. 17
7.1 Normal service conditions. 17
7.2 Connection identification and marking . 21
7.3 Conditions during transport and storage . 21
7.4 Electromagnetic compatibility (EMC) . 21
8 Constructional and performance requirements. 21
9 Tests . 21
9.1 Switching amplifier . 21
9.2 Proximity sensor . 23
9.3 Results to be obtained. 25
9.4 Verification of the electromagnetic compatibility. 27
Figure 1 – Example of a continuous characteristic of a proximity sensor. 19
Figure 2 – Example of a discontinuous characteristic of a proximity sensor . 19
Figure 3 – Control input of the switching amplifier . 23
Figure 4 – Characteristics of proximity sensor in the high impedance state . 25
Figure 5 – Characteristics of proximity sensor in the low impedance state. 27
Table 1 – Classification of proximity switches. 11
Table 2 – Connection and wiring identification. 21

60947-5-6 © IEC:1999 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
__________
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 5-6: Control circuit devices and switching elements –
DC interface for proximity sensors and
switching amplifiers (NAMUR)
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International
Organization for Standardization (ISO) in accordance with conditions determined by agreement between the
two organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60947-5-6 has been prepared by subcommittee 17B: Low-voltage
switchgear and controlgear, of IEC technical committee 17: Switchgear and controlgear.
The text of this standard is based on the following documents:
FDIS Report on voting
17B/1011/FDIS 17B/1030/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
The committee has decided that this publication remains valid until 2003.
At this date, in accordance with the committee’s decision, the publication will be
•
reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
60947-5-6 © IEC:1999 – 7 –
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 5-6: Control circuit devices and switching elements –
DC interface for proximity sensors and
switching amplifiers (NAMUR)
1 Scope
This International Standard applies to proximity sensors connected for operation by a two-wire
connecting cable to the control input of a switching amplifier. The switching amplifier contains
a d.c. source to supply the control circuit and is controlled by the variable internal resistance
of the proximity sensor.
These devices can be used in an explosive atmosphere if they also comply with
IEC 60079-11.
NOTE These devices have been defined by the German organization “Normenausschuß für Meß- und
Regelungstechnik (NAMUR)” (Office for Standardization of Measurement and Regulation Techniques).
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this International Standard. For dated references, subsequent
amendments to, or revisions of, any of these publications do not apply. However, parties to
agreements based on this International Standard are encouraged to investigate the possibility
of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of IEC
and ISO maintain registers of currently valid International Standards.
IEC 60079-11:1999, Electrical apparatus for explosive gas atmospheres – Part 11: Intrinsic
safety “i”
IEC 60947-1:1999, Low-voltage switchgear and controlgear – Part 1: General rules
IEC 60947-5-2:1999, Low-voltage switchgear and controlgear – Part 5-2: Control circuit
devices and switching elements – Proximity switches
3 Definitions
For the purpose of this International Standard the following definitions apply.
3.1
proximity sensor
device which converts the travel of an influencing body relative to it into an output signal
NOTE 1 The proximity sensor is preferably contactless (e.g. inductive, capacitive, magnetic, photoelectric).
NOTE 2 The proximity sensor may be operated with or without mechanical contact.
3.2
switching amplifier
device which converts the signal from the proximity sensor presented at the control input into
a binary output signal which may be produced e.g. by an electromagnetic relay or a semi-
conductor switching element
60947-5-6 © IEC:1999 – 9 –
3.3
control circuit
system comprising the proximity sensor, the control input of the switching amplifier and the
two-wire connecting cable
3.4
output signal of the proximity sensor
output current as a function of the variable internal resistance
3.5
distance/current characteristic of the proximity sensor
relationship of the output signal (the current value) in the steady state to the distance of the
influencing body relative to the sensor. Both continuous and discontinuous characteristics are
permitted (see 5.3 a
...