ABB LLT100, Functional Safety Manual

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SIL Verification:
The Safety Integrity Level (SIL) of an entire Safety Instrumented Function (SIF)
must be verified via a calculation of PFH/PFD
avg
considering redundant
architectures, proof test interval, proof test effectiveness, any automatic
diagnostics, average repair time and the specific failure rates of all products
included in the SIF. Each element must be checked to assure compliance with
minimum hardware fault tolerance (HFT) requirements.
The following documents are a mandatory part of certification:
Assessment Report:
ABB 17-04-094 R001 V1R0
Safety Manual: AA019031-01 Rev A LLT100 SIL Safety Manual
ABB 1704094 C001
Certificate / Certificat / Zertifikat /
Series LLT100
Lidar Sensors
Systematic Capability: SC 2 (SIL 2 Capable)
Random Capability: Type B Element
SIL 2 @ HFT=0; Route 1
H
PFH/PFD
avg
and Architecture Constraints
must be verified for each application
IEC 61508 Failure Rates in FIT*
Page 2 of 2
80 N Main St
Sellersville, PA 18960
* FIT = 1 failure / 10
9
hours
Systematic Capability:
The product has met manufacturer design process requirements of Safety
Integrity Level (SIL) 2. These are intended to achieve sufficient integrity
against systematic errors of design by the manufacturer.
A Safety Instrumented Function (SIF) designed with this product must not
be used at a SIL level higher than stated.
Random Capability:
The SIL limit imposed by the Architectural Constraints must be met for
each element.
Device λ
SD
λ
SU
λ
DD
λ
DU
ABB LLT100 0 356 705 113
T-013, V5R1