JUMO 14597 safetyM STB/STW Ex - Safety Temperature Limiter and Safety Temperature Monitor Operating Manual - Manual (Page 43)

6 Safety Manual
37 2013-04-01
Table 3: Terms and abbreviations according to DIN EN 61508 and DIN EN 61511
Name Description
Actuator Part of a safety instrumented system that intervenes in the process to achieve a safe
state.
EUC EUC (equipment under control)
Equipment, machine, apparatus, or plant used for manufacturing, shaping materials, for
transport, medical purposes, or other activities.
E / E / PE Electrical/electronic/programmable electronic (E/E/EP):
based on electrical (E) and/or electronic (E) and/or programmable electronic (PE)
technology
Failure End of the ability of a functional unit to perform a required function.
Diagnostic coverage Partial reduction in the probability of dangerous hardware failures due to the use of
automatic diagnostic tests.
Error A non-normal condition that can cause a reduction or the loss of the ability of a
functional unit to perform a required function.
Functional safety A part of overall safety related to the EUC and EUC control system that depends on the
correct function of the E/E/EP safety-relevant system, safety-relevant systems based
on other technology, and external equipment for risk reduction.
Functional unit Unit consisting of hardware or software or both that is suitable for performing a
specified task.
Dangerous failure A failure with the potential of placing the safety-related system in a dangerous state or a
state without functional capability.
Safe failure A failure without the potential of placing the safety-related system in a dangerous state
or state without functional capability.
Hazard Potential source of damage
Security Absence of unjustifiable risks