ISO 20401:2017

Pneumatic fluid power systems - Directional control valves - Specification of pin assignment for 8 mm and 12 mm diameter electrical round connectors

ISO 20401:2017 specifies the pin assignment for pneumatic directional control valves when used together with 8 mm and 12 mm diameter electrical round connectors according to IEC 60947-5-2. This definition is valid for connectors as shown in IEC 60947-5-2:2004, Figures D.2 and D.4, which are shown in Clause 4.

Transmissions pneumatiques — Distributeurs de commande directionnels — Spécification de l'affectation des broches des connecteurs électriques ronds de diamètres 8 mm et 12 mm

Fluidna tehnika - Pnevmatika - Potni ventili - Specifikacija za kontakte za okrogle električne konektorje s premeroma 8 mm in 12 mm

Standard ISO 20401:2017 določa dodelitev zatičev za pnevmatske krmilne ventile, kadar se uporabljajo skupaj z električnimi okroglimi konektorji premera 8 mm in 12 mm v skladu z IEC 60947-5-2. Ta opredelitev velja za konektorje, kot so prikazani v IEC 60947-5-2:2004, sliki D.2 in D.4, ki sta prikazani v točki 4.

General Information

• Status: Published
• Publication Date: 01-Aug-2017
• ICS: 23.100.50 - Control components
• Technical Committee: ISO/TC 131/SC 5 - Control products and components
• Drafting Committee: ISO/TC 131/SC 5/WG 3 - Pneumatic control products
• Current Stage: 9093 - International Standard confirmed
• Start Date: 22-Mar-2023
• Completion Date: 13-Dec-2025
• Ref Project: SIST ISO 20401:2023 - Pneumatic fluid power systems - Directional control valves - Specification of pin assignment for 8 mm and 12 mm diameter electrical round connectors

Relations

• Revises: ISO 20401:2005 - Pneumatic fluid power systems - Directional control valves - Specification of pin assignment for electrical round connectors of diameters 8 mm and 12 mm
• Effective Date: 08-Nov-2014

Overview

ISO 20401:2017 specifies standardized pin assignment for electrical round connectors used on pneumatic directional control valves. It applies to 8 mm and 12 mm diameter round plug connectors as defined in IEC 60947-5-2 (Figures D.2 and D.4). The standard ensures consistent wiring and electrical interface for solenoid-actuated valves in pneumatic fluid power systems, supporting interoperability, safe installation, and simplified maintenance.

Key Topics and Requirements

• Scope: Pin assignment for directional control valves used with 8 mm and 12 mm electrical round connectors according to IEC 60947-5-2.
• Connector types: Definitions refer specifically to the connector forms shown in IEC 60947-5-2 (male face views for 12 mm five-pin and 8 mm four-pin connectors).
• Pin allocation (explicit):
  • Valves with a single solenoid:
    • Pin 1: not used
    • Pin 2: not used
    • Pin 3: 0 V (solenoid)
    • Pin 4: UB (supply voltage for solenoid)
  • Valves with double solenoids (one connector):
    • Pin 1: not used
    • Pin 2: UB for solenoid 12
    • Pin 3: 0 V for solenoids
    • Pin 4: UB for solenoid 14
  • Valves with double solenoids (two connectors):
    • For both connectors:
      • Pin 1: not used
      • Pin 2: not used
      • Pin 3: 0 V
      • Pin 4: UB
• Identification & symbols:
  • Port and control mechanism identification follows ISO 11727.
  • Graphical symbols used are in accordance with ISO 1219-1.
• Normative references: ISO 5598 (vocabulary), IEC 60947-5-2 (proximity switch connectors), plus related ISO documents.

Applications and Who Uses It

• Pneumatic valve manufacturers: implement standardized pinouts to ensure product compatibility.
• OEMs and machine builders: design machines with consistent electrical interfaces for directional control valves.
• System integrators and panel builders: reduce wiring errors and commissioning time through predictable connector pinning.
• Maintenance and service engineers: quickly diagnose and replace solenoid valves without consulting device-specific wiring diagrams.
• Safety and compliance teams: use the standard to demonstrate conformity with international switchgear and control interface practices.

Related Standards

• IEC 60947-5-2 - Low-voltage switchgear and controlgear (connector forms referenced)
• ISO 1219-1 - Graphical symbols for fluid power
• ISO 11727 - Identification of valve ports and control mechanisms
• ISO 5598 - Fluid power vocabulary
• Bibliography: ISO 5599-1, ISO 15407-1 (mounting interface references)

Keywords: ISO 20401:2017, pneumatic fluid power, directional control valves, pin assignment, 8 mm connector, 12 mm connector, IEC 60947-5-2, solenoid pin allocation.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2023
Fluidna tehnika - Pnevmatika - Potni ventili - Specifikacija za kontakte za okrogle
električne konektorje s premeroma 8 mm in 12 mm
Pneumatic fluid power systems - Directional control valves - Specification of pin
assignment for 8 mm and 12 mm diameter electrical round connectors
Transmissions pneumatiques — Distributeurs de commande directionnels —
Spécification de l'affectation des broches des connecteurs électriques ronds de
diamètres 8 mm et 12 mm
Ta slovenski standard je istoveten z: ISO 20401:2017
ICS:
23.100.50 Krmilni sestavni deli Control components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 20401
Second edition
2017-07
Pneumatic fluid power systems —
Directional control valves —
Specification of pin assignment for 8
mm and 12 mm diameter electrical
round connectors
Transmissions pneumatiques — Distributeurs de commande
directionnels — Spécification de l’affectation des broches des
connecteurs électriques ronds de diamètres 8 mm et 12 mm
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2017 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Integral connectors for plug-in proximity switches . 2
5 Graphical symbols . 2
6 Electrical contacts (pin allocation) . 2
6.1 Identification . 2
6.2 Pin allocation for valves with a single solenoid . 3
6.3 Pin allocation for valves with double solenoids and one connector . 3
6.4 Pin allocation for valves with double solenoids and two connectors . 3
Bibliography . 5
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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
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 paten
...

INTERNATIONAL ISO
STANDARD 20401
Second edition
2017-07
Pneumatic fluid power systems —
Directional control valves —
Specification of pin assignment for 8
mm and 12 mm diameter electrical
round connectors
Transmissions pneumatiques — Distributeurs de commande
directionnels — Spécification de l’affectation des broches des
connecteurs électriques ronds de diamètres 8 mm et 12 mm
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2017 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Integral connectors for plug-in proximity switches . 2
5 Graphical symbols . 2
6 Electrical contacts (pin allocation) . 2
6.1 Identification . 2
6.2 Pin allocation for valves with a single solenoid . 3
6.3 Pin allocation for valves with double solenoids and one connector . 3
6.4 Pin allocation for valves with double solenoids and two connectors . 3
Bibliography . 5
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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity
...