Functional Safety 2014

TÜV SÜD Product Service

Objectives

To create E/E/PE safety related systems conforming to the specification for the E/E/PE system

safety requirements (comprising the specification for the E/E/PE system safety functions

requirements and the specification for the E/E/PE system safety integrity requirements).

IEC 61508

Part 1 Clauses

7.11.1; 7.11.2

Part 2 for Hardware

Part 3 for Software

IEC 62061

Subsystems can be

evaluated for random

hardware failures

according to formulae

given in clause 6.7.8.2

Verification is primarily

achieved by testing –

Clause 6.12

ISO 13849

Clause 4.7

The PL achieved by each

safety function shall

match the required PL

(PLr). Figure 5 describes

the relationship

between Category,

MTTF

and DC

avg

Realisation – Hardware verification