1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Determination of suitability
5 Determination of the control parameters
6 Control actuator settings
7 Ignition protection of sensors and actuators
8 Sensor and ignition control actuator functional failure
rate (FFR)
9 Additional constructional requirements for sensors and
ignition control actuators
10 Type tests
11 Documentation and instructions
12 Marking
Annex A (informative) Flow diagram of the procedures
described in this standard
Annex B (informative) The thought process used to assign
FFRs to the different categories of equipment
B.1 For Category 3 non-electrical equipment
B.2 For Category 2 non-electrical equipment,
B.3 For Category M2 non-electrical equipment
B.4 For Category 1 and category M1 non-electrical
equipment
Annex C (informative) Background information on EN 954-1
and IEC 61508
Annex ZA (informative) Clauses of this European Standard
addressing essential requirements or other
provisions of EU Directives