ISO/TR 22053:2021

Safety of machinery - Safeguarding supportive system

This document provides guidance for the design and integration of a safeguarding supportive system (SSS) which is intended to include a mode selection as part of an SRP/CS or to add a layer of personnel authentication and authorization to an IMS designed according to ISO 11161. This document is meant to be used in conjunction with ISO 11161. This document is applicable to the SSS but does not address personnel qualification and competency.

Sécurité des machines — Système de protection complémentaire

General Information

• Status: Published
• Publication Date: 01-Feb-2021
• ICS: 13.110 - Safety of machinery
• Technical Committee: ISO/TC 199 - Safety of machinery
• Drafting Committee: ISO/TC 199/WG 3 - Safety of integrated manufacturing systems
• Current Stage: 6060 - International Standard published
• Start Date: 02-Feb-2021
• Completion Date: 02-Feb-2021

Overview

ISO/TR 22053:2021 - Safety of machinery - Safeguarding supportive system (SSS) - provides guidance for the design and integration of a safeguarding supportive system (SSS) used with integrated manufacturing systems (IMS). The technical report explains how an SSS can provide mode selection as part of safety-related parts of a control system (SRP/CS) or add a layer of personnel authentication and authorization to IMS designed according to ISO 11161. This guidance is intended to be used alongside ISO 11161 and does not cover personnel qualification or competency.

Key topics and technical requirements

• Purpose and scope
  • SSS is a complementary protective measure - used in conjunction with, not in place of, guards and protective devices.
  • Targets tasks in hazard zones where human factors increase risk (set‑up, adjusting, maintenance, teaching, troubleshooting).
• Primary SSS functions
  • Identification of authorized personnel (authentication).
  • Verification that requested task matches personnel authorization.
  • Displaying authorized tasks and accessible zones.
  • Enabling the appropriate operating mode (mode selection) via SRP/CS inputs.
• System components
  • Identification elements: ID devices (biometric cameras, RFID/tag readers, barcode, key switches) and authorized personnel IDs.
  • Human–SSS interface (HMI): request input, status feedback, audible/visual indications of access paths, selected task and authorization outcome.
  • Logic unit: authenticates credentials against a credential database and provides outputs to SRP/CS.
  • Credential database: local or remote resource defining permissions, modes and task associations.
• Interfaces and safety functions
  • Interface between SSS and SRP/CS must support enabling/disabling safety functions (e.g., restart, reset, guard‑lock release).
  • Mode selection enabled by SSS is a safety function requiring SRP/CS performance assessment per ISO 13849‑1.
• Design validation
  • Risk assessment and verification/validation required per ISO 12100 and ISO 13849 series.

Practical applications and users

• Typical applications: machine builders and OEMs adding access control for local operations; system integrators implementing IMS mode selection; factories reducing human error during maintenance and setup; safety teams coordinating access to control zones.
• Primary users:
  • Safety engineers and system integrators
  • Machinery designers and OEMs
  • Plant managers and employers responsible for machinery safety
  • Compliance auditors and technical writers preparing safety documentation

Related standards

• ISO 11161 (IMS requirements)
• ISO 12100 (risk assessment and reduction)
• ISO 13849‑1 / ISO 13849‑2 (SRP/CS performance)
• ISO 14119 (interlocking devices)
• ISO 20607 (instructions for use)
• ISO/TR 22100‑4 (IT/cyber considerations)

Keywords: ISO/TR 22053:2021, safeguarding supportive system, SSS, safety of machinery, IMS, ISO 11161, SRP/CS, authentication, authorization, ISO 13849-1, risk assessment.

Standards Content (Sample)

TECHNICAL ISO/TR
REPORT 22053
First edition
2021-01
Safety of machinery — Safeguarding
supportive system
Sécurité des machines — Système de protection complémentaire
Reference number
©
ISO 2021
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
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ii © ISO 2021 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 2
5 Safeguarding supportive system . 2
5.1 General . 2
5.2 Description of safeguarding supportive system . 3
5.3 Interface between SSS and SRP/CS . 3
6 Design of safeguarding supportive system. 4
6.1 General . 4
6.2 System components . 4
6.2.1 General. 4
6.2.2 Identification elements . 4
6.2.3 Human–SSS interface . 5
6.2.4 Logic unit . 5
6.3 Output from the credential database . 5
6.4 Verification and validation . 5
7 Information for use . 6
Annex A (informative) Visualization of integration of SSS within IMS . 7
Bibliography . 8
Foreword
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This document was prepared by Technical Committee ISO/TC 199, Safety of machinery.
Any feedback or questions on this document should be directed to the user’s national standards body. A
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iv © ISO 2021 – All rights reserved

Introduction
This document was developed to provide information about systems incorporating measures that can
be introduced into machinery, especially in IMS for reducing risks based on human factors.
Due to lack of human attentiveness during any task performed in a hazard zone (for example,
inspections, maintenance or set-up), safeguarding supportive systems can be used as a technical
measure to minimize the probability of dangerous human errors occurring.
TECHNICAL REPORT ISO/TR 22053:2021(E)
Safety of machinery — Safeguarding supportive system
1 Scope
This document provides guidance for the design and integration of a safeguarding supportive system
(SSS) which is intended to include a mode selection as part of an SRP/CS or to add a layer of personnel
authentication and authorization to an IMS designed according to ISO 11161.
This document is meant to be used in conjunction with ISO 11161.
This document is applicable to the SSS but does not address personnel qualification and competency.
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.
ISO 11161:2007, Safety of machinery — Integrated manufacturing systems — Basic requirements
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 11161, ISO 12100 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
safeguarding supportive system
SSS
complementary risk reduction/protective measure to enable mode selection by the use of authentication
(3.5) means
3.2
identificat
...