Overview
CEN/TR 1459-6:2015 is a Technical Report that explains how to apply EN ISO 13849-1:2008 to slewing and non-slewing variable-reach rough-terrain trucks. Its primary aim is to document the risk assessment methodology used to determine the Performance Level required (PLr) for safety-related parts of control systems (SRP/CS) referenced in prEN 1459‑1, EN 1459‑2 and EN 1459‑3. The report clarifies rationale and procedures for establishing minimum PLs for electrical/electronic SRP/CS (it does not apply where SRP/CS contain no electrical/electronic components).
Key topics and technical requirements
- Risk assessment methodology: Step‑by‑step approach for identifying hazards, estimating and evaluating risk, and deriving required PLr for SRP/CS.
- Risk assessment process elements:
- Determination of machine limits and operating conditions
- Hazard identification (aligned with EN ISO 12100 principles)
- Risk estimation and evaluation for different persons (operator, co‑worker, bystander)
- Performance Level determination: Use of EN ISO 13849‑1 criteria to translate risk priority into required PL for control functions.
- Risk Priority Number (RPN) approach: Numerical weighting and mapping of RPNs to Performance Levels (informative annexes provide the weighting and conversion guidance).
- Extensive annex material: Informative annexes include hazard lists, RPN numerical tables, PL correlation tables and comprehensive risk estimation examples covering many operating scenarios.
Practical applications
- Design and validation of SRP/CS: OEMs and system integrators can use the methodology to justify the required safety architecture and diagnostic measures for electrical/electronic control components.
- Type‑C standard implementation: Enables consistent application of EN ISO 13849‑1 within the EN 1459 series for variable‑reach rough‑terrain trucks.
- Conformity and verification: Useful for safety engineers, notified bodies and test laboratories performing verification, certification or conformity assessments against EN 1459 parts.
- Standards development: The methodology is intended as a template for future EN 1459 parts and can be reused by other technical committees developing machine‑specific standards.
Who should use this standard
- Manufacturers of rough‑terrain trucks and attachments
- Functional safety engineers and control system designers
- Certification bodies, test labs and safety assessors
- Standards committees drafting machine‑specific PL requirements
Related standards
- EN ISO 13849‑1:2008 (Safety of machinery - Safety‑related parts of control systems - Performance levels)
- EN ISO 12100 (general principles for hazard identification and risk assessment)
- prEN 1459‑1, EN 1459‑2, EN 1459‑3 (parts of the EN 1459 series on variable‑reach rough‑terrain trucks)
Keywords: rough‑terrain trucks, variable‑reach, slewing, EN ISO 13849‑1, Performance Level, SRP/CS, risk assessment, EN 1459.