ISO 23570-3:2009

INTERNATIONAL ISO
STANDARD 23570-3
Second edition
2009-07-01
Industrial automation systems and
integration — Distributed installation
in industrial applications —
Part 3:
Power distribution bus
Systèmes d'automatisation industrielle et intégration — Installation
distribuée dans les applications industrielles —
Partie 3: Bus de distribution d'énergie

Reference number
©
ISO 2009
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

©  ISO 2009
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2009 – All rights reserved

Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Conformance. 1
3 Normative references . 1
4 Terms and definitions. 2
5 Requirements for power bus . 2
5.1 General. 2
5.2 Cables and cable assemblies . 2
5.3 Connectors . 2
5.4 Motor controllers . 3
5.5 Power supplies. 3
5.6 Cable assembly termination . 3
6 Connection of motors to motor controllers .4
6.1 Connectors . 4
6.2 Cables . 9
Annex A (normative) Design specification for power bus connectors . 13
Annex B (normative) Design specification for type 1 motor/controller connectors . 19
Annex C (normative) Design specification for type 2 motor/controller connectors . 23
Annex D (normative) Design specification for type 3 motor/controller connectors . 28
Annex E (informative) Reference colours. 37
Bibliography . 38

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 23570-3 was prepared by Technical Committee ISO/TC 184, Automation systems and integration,
Subcommittee SC 1, Physical device control.
This second edition cancels and replaces the first edition (ISO 23570-3:2006), of which it constitutes a minor
revision.
The following significant changes have been made to the first edition:
a) addition of a third variant of motor connectors which is especially suitable for smaller motors, either in
physical size, in power capacity, or both, and which can be used to interconnect the motor controller and
the auxiliary motors;
b) extension and reorganizion of the contents of Clause 6 in order to describe the new motor connector;
c) addition of a new Annex D, which describes the design elements of the new motor connector;
d) renumbering of previous Annex D as Annex E.
ISO 23570 consists of the following parts, under the general title Industrial automation systems and
integration — Distributed installation in industrial applications:
⎯ Part 1: Sensors and actuators
⎯ Part 2: Hybrid communication bus
⎯ Part 3: Power distribution bus
iv © ISO 2009 – All rights reserved

Introduction
Modern machine tools for the discrete parts manufacturing industry are complex systems, consisting of
subsystems for material preparation (metal removal, material forming, etc.), material handling, fixturing and
transfer lines for moving parts from one station to another. Each subsystem, in turn, is itself a complex system,
including many sensors, actuators and control elements that receive and transmit electric signals and/or
require electric power. To reduce down time in case of failure, most of them use cable assemblies for quick
replacement. Proper operation of the system as a whole requires co-ordination of the subsystems, which
requires more cables and connectors. As a consequence of this complexity, a large variety of cables and
connectors are required for the proper operation of such a machine tool. The increasing number of sensors,
actuators and control elements leads to an increasing variety of such cable assemblies. This variety results in
increased maintenance costs due to complexity, large spare parts inventory and increased training costs for
maintenance personnel.
ISO 23570 prescribes a set of requirements for cables, connectors and parameter selections within these
elements, which, if implemented completely, will greatly reduce the wiring complexity and maintenance cost of
such machine systems. The manufacturer of such systems will benefit in terms of decreased complexity costs,
and the user of such systems will benefit in terms of decreased down time because of decreased parts
inventory and simplified maintenance training.
The technology described in ISO 23570 may have applicability to other industries and processes, i.e. there is
no intent to restrict it to discrete parts manufacturing.
The following three main areas are addressed within ISO 23570:
⎯ the interconnection of sensors and actuators to the system backbone,
⎯ a hybrid system backbone containing an information path (a fieldbus) and a source of power to the field
devices, and
⎯ a power trunk capable of providing power to all the auxiliary motors in the system.
Large power devices, such as spindle motors for metal removal, are not covered by ISO 23570.
Machine tools described in ISO 23570 are subject to constraints imposed by national and international safety
standards. ISO 23570 is intended to specify system elements that support the compliance to such standards.
Figure 1 illustrates the system components addressed in ISO 23570. In the figure, the solid cable represents
the power distribution bus providing three-phase a.c. power for electric motors. The open cable represents a
hybrid communication bus, containing both a fieldbus communication channel and low voltage power.
The centre of the figure shows a control cabinet (3) serving three sets of distribution buses. This box contains
the fieldbus communication front end, the low voltage power supplies and the three-phase power supplies.
To the left of the control cabinet are a motor with integrated electronics (1) and a fixed speed motor with a
separate motor controller (2). Both units are linked to the control cabinet by both the communication bus and
the power distribution bus.
To the right of the control cabinet are a fixed speed motor with an attached motor controller (4), a variable
speed motor with an integrated I/O module connected to several sensors and actuators (5), and another
I/O module (6) connected to several sensors and actuators, including a hydraulic/pneumatic valve. The
I/O module (6) is linked to the control cabinet only by the hybrid communication bus.
In front of the control cabinet are three more units: a motor with integrated electronics (7), another I/O module
connected to several sensors and actuators including a hydraulic/pneumatic valve (8), and a remote control
terminal (9).
Figure 1 is intended to illustrate the variety of interconnections possible using the elements of ISO 23570.
Key
1 motor with integrated electronics (e.g. a stepping motor)
2 fixed speed motor with separate motor controller
3 power distribution and control cabinet
4 fixed speed motor with attached motor controller
5 variable speed motor with integrated I/O module together with sensors and actuators
6 I/O module with a set of sensors
7 motor with integrated electronics (e.g. a stepping motor)
8 I/O module connected to a set of sensors and actuators including a hydraulic/pneumatic valve
9 remote control terminal
Figure 1 — System components addressed in ISO 23570
ISO 23570-1 provides the requirements for sensors, actuators, and I/O modules that support this system
requirement. ISO 23570-2 provides the requirements for a shared communication and low voltage power
distribution system. This part of ISO 23570 provides the requirements for distribution of power to the low
power motor systems.
While significant reduction in maintenance and operational costs may be achieved by adoption of individual
parts of ISO 23570, the greatest benefit will occur only if all parts are implemented.
This part of ISO 23570 provides requirements for the distribution of power to the low power motor systems.
vi © ISO 2009 – All rights reserved

INTERNATIONAL STANDARD ISO 23570-3:2009(E)

Industrial automation systems and integration — Distributed
installation in industrial applications —
Part 3:
Power distribution bus
1 Scope
ISO 23570 specifies the interconnection of elements in the control system of machine tools and similar large
pieces of industrial automation, including cable types, sizes and sheath colours, connector types and contact
assignments, and diagnostic functions appropriate to the sensors and actuators.
This part of ISO 23570 specifies the interconnection of single-phase or three-phase auxiliary motors with their
power source.
ISO 23570 does not address the design or operation of such equipment with respect to safety issues. It is
advisable that appropriate safety standards be consulted for such requirements.
2 Conformance
Producers of power bus cable assemblies may claim conformance to this part of ISO 23570 if they meet the
requirements of Clause 5.
Producers of motor controllers may claim conformance to this part of ISO 23570 if they meet the requirements
of Clause 5 and the requirements of Clause 6.
Producers of connectors may claim conformance to this part of ISO 23570 if they meet the requirements of
Clause 5 or the requirements of Clause 6.
Producers of motors and motor cable assemblies may claim conformance to this part of ISO 23570 if they
meet the requirements of Clause 6.
Producers of discrete part manufacturing equipment may claim conformance to this part of ISO 23570 if all the
components of the discrete part manufacturing equipment that are subject to the requirements of Clause 5
and/or Clause
...