Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Operating principles and typical forms of interlocking
devices associated with guards
4.1 Interlocking principles
4.2 Typical forms of interlocking devices
4.3 Technological forms of interlocking devices
5 Provisions for the design of interlocking devices (independent
of the nature of the energy source)
5.1 Actuation modes of mechanically actuated position detectors
5.2 Arrangement and fastening of position detectors
5.3 Arrangement and fastening of cams
5.4 Reducing the possibility of common cause failures
5.5 Guard locking device
5.6 Delay devices
5.7 Design to minimize defeat possibilities
5.8 Environmental considerations
6 Additional technological requirements for electrical interlocking
devices
6.1 Compliance with EN 60204-1
6.2 Interlocking devices incorporating mechanically actuated
position switches
6.3 Interlocking devices incorporating non-mechanically
actuated position switches (proximity switches and magnetic
switches)
7 Selection of an interlocking device
7.1 General
7.2 Conditions of use and intended use
7.3 Risk assessment
7.4 Stopping time and access time
7.5 Frequency of access (frequency of opening the guard for
access to the danger zone)
7.6 Performance considerations
Annex A (informative) - Guard-operated interlocking device with
one single cam-operated position detector
Annex B (informative) - Guard-operated interlocking device with
tongue-operated switch
Annex C (informative) - Direct (mechanical) interlocking between
guard and start/stop manual control
Annex D (informative) - Captive-key interlocking device
Annex E (informative) - Trapped-key interlocking device
Annex F (informative) - Plug and socket interlocking device
[plug/socket combination]
Annex G (informative) - Guard-operated interlocking device
incorporating two cam-operated position detectors
Annex H (informative) - Mechanical interlocking between a guard and
a movable element
Annex J (informative) - Electrical interlocking device incorporating
magnetically actuated [magnetic] switches
Annex K (informative) - Electrical interlocking device incorporating
two proximity detectors
Annex L (informative) - Pneumatic/hydraulic interlocking devices
Annex M (informative) - Interlocking device with spring applied/power
released guard locking device
Annex N (informative) - Interlocking device with guard locking,
with manually operated delay device
Annex ZA (informative) - Relationship between this European Standard
and the Essential Requirements of EU Directive 98/37/EC
Annex ZB (informative) - Relationship between this European Standard
and the Essential Requirements of EU Directive 2006/42/EC
Bibliography