ISO 14118:2017 specifies requirements for designed-in means aimed at preventing unexpected machine start-up (see 3.2) to allow safe human interventions in danger zones (see Annex A). ISO 14118:2017 applies to unexpected start-up from all types of energy source, i.e.: - power supply, e.g. electrical, hydraulic, pneumatic; - stored energy due to, e.g. gravity, compressed springs; - external influences, e.g. from wind. ISO 14118:2017 does not specify performance levels or safety integrity levels for safety-related parts of control systems. While available means to prevent unexpected start-up are identified, this document does not specify the means for the prevention of unexpected machine start-up for specific machines. NOTE A type-C standard can define the required means for the prevention of harm arising from unexpected start-up. Otherwise, the requirements for a specific machine need to be determined by risk assessment outside the scope of this document.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 General measures to prevent unexpected start-up
4.1 General
4.2 Manual measures for isolation and energy dissipation
4.3 Other means to prevent unexpected (unintended) start-up
4.4 Signalling and warning (delayed start)
5 Isolation and energy dissipation
5.1 Prevention of unexpected start-up upon restoration of any power supplies
5.2 Devices for isolation from power supplies
5.3 Locking (securing) devices
5.4 Devices for stored-energy dissipation or restraint (containment)
6 Other measures to prevent unexpected start-up
6.1 Design strategy
6.2 Measures to prevent unintended generation of start commands
6.3 Measures to maintain stop commands
6.4 Automatic monitoring of the safe state (stopped condition) during a category 2 stop
7 Design requirements for verification
7.1 General
7.2 Provisions for verifying isolation
7.3 Provisions for verifying energy dissipation or restraint (containment)
Annex A Examples of tasks which can require the presence of persons in danger zones (informative)
IEC 62061:2005
ISO 12100:2010 Safety of machinery -- General principles for design -- Risk assessment and risk reduction
ISO 13849-1:2015 Safety of machinery -- Safety-related parts of control systems -- Part 1: General principles for design
IEC 62061:2005
ISO 12100:2010 Safety of machinery -- General principles for design -- Risk assessment and risk reduction
ISO 13849-1:2015 Safety of machinery -- Safety-related parts of control systems -- Part 1: General principles for design