ISO 23570-3:2006
(Main)Industrial automation systems and integration — Distributed installation in industrial applications — Part 3: Power distribution bus
Industrial automation systems and integration — Distributed installation in industrial applications — Part 3: Power distribution bus
The scope of ISO 23570 is the interconnection of elements in the control system of machine tools and similar large pieces of industrial automation. This specification includes cable types, sizes, and sheath colours, connector types and contact assignments, and diagnostic functions appropriate to the sensors and actuators. ISO 23570-3:2006 covers the interconnection of three-phase auxiliary motors with their power source.
Systèmes d'automatisation industrielle et intégration — Installation distribuée dans les applications industrielles — Partie 3: Bus de distribution d'énergie
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 23570-3
First edition
2006-08-15
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 23570-3:2006(E)
©
ISO 2006
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ISO 23570-3:2006(E)
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ISO 23570-3:2006(E)
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 . 5
Annex A (normative) Design specification for power bus connectors . 8
Annex B (normative) Design specification for motor connectors . 14
Annex C (normative) Motor controller connector. 18
Annex D (informative) Reference colours. 23
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ISO 23570-3:2006(E)
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, Industrial automation systems and
integration, Subcommittee SC 1, Physical device control.
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
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ISO 23570-3:2006(E)
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.
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
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ISO 23570-3:2006(E)
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. Benefits will occur to the manufacturer of such systems in decreased complexity costs
and to the user of such systems in 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; there is no
intention of restricting it to discrete parts manufacturing.
There are three main areas 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;
⎯ 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. It is the intention of ISO 23570 to specify system elements that support the compliance to such
standards.
In Figure 1, the solid cable represents the power distribution bus providing three-phase AC 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 (1) a motor with integrated electronics and (2) a fixed speed motor with a
separate motor controller. 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 (4) a fixed speed motor with an attached motor controller, (5) a variable
speed motor with an integrated I/O module connected to several sensors and actuators, and (6) another
I/O module 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, (7) a motor with integrated electronics, (8) another
I/O module connected to several sensors and actuators including a hydraulic/pneumatic valve, and (9) a
remote control terminal.
The figure is intended to illustrate the variety of interconnections possible employing the elements of
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. ISO 23570-3 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.
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INTERNATIONAL STANDARD ISO 23570-3:2006(E)
Industrial automation systems and integration — Distributed
installation in industrial applications —
Part 3:
Power distribution bus
1 Scope
The scope of ISO 23570 is the interconnection of elements in the control system of machine tools and similar
large pieces of industrial automation. This specification includes 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 covers the interconnection of three-phase auxiliary motors with their power source.
NOTE ISO 23570 does not address the design or operation of such equipment with respect to safety issues.
Appropriate safety standards should 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 6 meet those requirements.
3 Normative references
The following referenced documents are indispensable for the application 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.
IEC 60529:2001-02 Ed. 2.1, Degrees of protection provided by enclosures (IP code)
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ISO 23570-3:2006(E)
4 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
4.1
IP Code
coding system to indicate the degrees of protection provided by an enclosure against access to hazardous
parts, ingress of solid foreign objects, ingress of water and to give additional information in connection with
such protection
[IEC 60529]
5 Requirements for power bus
5.1 General
This part of ISO 23570 specifies a cable system capable of supplying three-phase power to auxiliary motors
present in the system. Motors, that power cutting spindles, are outside the scope of this part of ISO 23570.
All components specified by ISO 23570 shall be rated IP65 and IP67 as defined in IEC 60529.
NOTE 1 Components and systems covered by this part of ISO 23570 may also be subject to requirements on EMC.
NOTE 2 For the purposes of this part of ISO 23570, auxiliary motors are defined to be motors capable of providing
5,5 kW output or less.
5.2 Cables and cable assemblies
The cable for the power bus shall contain seven wires. The minimum cross-sectional area of a wire shall be
2
2,5 mm .
Cables shall have an outer sheath whose material is resistant to all common industry coolants. The supplier of
cable assemblies shall provide a list of lubricants and coolants that are compatible with the cable. The sheath
colour shall be black.
NOTE See Annex D for further elaboration of the colour specification.
A cable connector meeting the requirements of 5.3 shall terminate each end of a cable assembly. One end of
the cable assembly shall have a male connector; the other end shall have a female connector.
Some uses of such cables may require constant flexing such as use in drag chain operations. The cable shall
be characterized as to whether it is suitable for such an operation.
All low voltage control cables that are not otherwise specified in ISO 23570 shall have a sheath colour of grey.
5.3 Connectors
The connectors shall have a positive coupling facility ensuring that the connectors are fully mated. The
coupling facility shall require either no tools or simple hand tools to couple or uncouple. Connectors shall be
polarized so as to avoid incorrect mating.
The contacts for the wires shall be matched in size to the cable wires to ensure physical integrity of the
connection and adequate electrical conductance. The contacts for the wires shall have a current-carrying
capacity of 10 A or greater per contact.
The connectors shall have six contacts plus protective earth. Table 1 provides the contact assignments for
these connectors.
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ISO 23570-3:2006(E)
Table 1 — Contact assignment for power bus connectors
Contact Assignment
1 Phase 1 power
2 Phase 2 power
3 Phase 3 power
4 Neutral
11 Brake
12 Brake
PE Protective earth
NOTE Annex A provides further specification for connectors satisfying these requirements.
5.4 Motor controllers
Each motor controller shall be equipped with two connectors each meeting the requirements of 5.3, one male
connector and one female connector.
NOTE 1 The intention is that the motor controller will be placed in the power bus so that the power is fed to the male
connector. Strict adherence to the requirements for cable assemblies and for power supplies provided in this part of
ISO 23570 will ensure that this occurs.
The use of the neutral circuit and the brake circ
...
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