Vega VEGAPULS 68 - Functional Safety; In General

1 Functional safety
1.1 In
general
This safety manual applies to measuring systems consisting of
the VEGAPULS series 60 radar sensor in two-wire and four-
wire versions 4 … 20 mA/HART:
VEGAPULS 61, 62, 63, 65, 66, 67, 68
Valid hardware and software versions:
Serial number of the
electronics
Sensor software
VEGAPULS 61, 62, 63,
65, 66
>13978716 from rev. 3.22
VEGAPULS 61, 62, 63
with increased sensitiv-
ity
>14165303 from rev. 3.25
VEGAPULS 67, 68 >14165303 from rev. 3.25
The measuring system can be used for level measurement of
liquids and solids which meet the specific requirements of the
safety technology.
This is possible up to SIL2 in a single channel architecture
(1oo1D), and up to SIL3 in a multiple channel, diverse
redundant architecture.
The use of the measuring system in a multiple channel,
homogeneous redundant architecture is excluded.
The SIL declaration of conformity can be downloaded from our
homepage in the Internet.
Further abbreviations and terms are stated in IEC 61508-4.
SIL Safety Integrity Level
HFT Hardware Fault Tolerance
SFF Safe Failure Fraction
PFD
avg
average Probability of dangerous Failure on Demand
PFH Probability of a dangerous Failure per Hour
FMEDA Failure Mode, Effects and Diagnostics Analysis
λ
sd
Rate for safe detected failure
λ
su
Rate for safe undetected failure
Scope
Area of application
SIL conformity
Abbreviations, terms
VEGAPULS series 60 - 4 … 20 mA/HART 3
Functional safety
31338-EN-070510